# Nanorobotics

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Emerging technology field

"Nanobots" redirects here. For the They Might Be Giants album, see [Nanobots (album)](/source/Nanobots_(album)).

 A [ribosome](/source/Ribosome) is a [biological machine](/source/Biological_machine).  [Protein domain dynamics](/source/Protein_domain_dynamics) can now be seen by [neutron spin echo](/source/Neutron_spin_echo) spectroscopy.

Part of a series of articles on Nanotechnology History Organizations Popular culture Outline Impact and applications Nanoengineering Nanomedicine Nanonetwork Nanotoxicology Green nanotechnology Hazards Regulation Nanomaterials Fullerenes Carbon nanotubes Nanoparticles Molecular self-assembly Self-assembled monolayer Supramolecular assembly DNA nanotechnology Nanoelectronics Molecular scale electronics Molecular logic gate Nanolithography Moore's law Semiconductor device fabrication Semiconductor scale examples Nanometrology Atomic force microscopy Scanning tunneling microscope Electron microscope Super-resolution microscopy Nanotribology Molecular nanotechnology Molecular assembler Nanorobotics Mechanosynthesis Molecular engineering Science portal Technology portal v t e

**Nanoid robotics** (**nanorobotics** or **nanobotics** for short) is an [emerging technology](/source/Emerging_technology) field creating [robots](/source/Robot) whose components are at or near the scale of a [nanometer](/source/Nanometer) (10−9 meters).[1][2][3] More specifically, nanorobotics (as opposed to [microrobotics](/source/Microrobotics)) refers to the [nanotechnology](/source/Nanotechnology) engineering discipline of designing and building nanorobots with devices ranging in size from 0.1 to 10 [micrometres](/source/Micrometre) and constructed of [nanoscale](/source/Nanoscopic_scale) or [molecular](/source/Molecular) components.[4][5] The terms *nanobot*, *nanoid*, *nanite*, *nanomachine* and *nanomite* have also been used to describe such devices currently under research and development.[6][7]

[Nanomachines](/source/Nanomachine) are largely in the [research and development](/source/Research_and_development) phase,[8] but some primitive [molecular machines](/source/Molecular_machine) and [nanomotors](/source/Nanomotor) have been tested. An example is a sensor having a switch approximately 1.5 nanometers across, able to count specific molecules in the chemical sample. The first useful applications of nanomachines may be in [nanomedicine](/source/Nanomedicine). For example,[9] [biological machines](/source/Biological_machine) could be used to identify and destroy cancer cells.[10][11] Another potential application is the detection of toxic chemicals, and the measurement of their concentrations, in the environment. [Rice University](/source/Rice_University) has demonstrated a [single-molecule car](/source/Nanocar) developed by a chemical process and including [Buckminsterfullerenes](/source/Buckminsterfullerene) (buckyballs) for wheels. It is actuated by controlling the environmental temperature and by positioning a [scanning tunneling microscope](/source/Scanning_tunneling_microscope) tip.

Another definition[12][13][14] is a robot that allows precise interactions with nanoscale objects, or can manipulate with [nanoscale](/source/Nanoscopic_scale) resolution. Such devices are more related to [microscopy](/source/Microscopy) or [scanning probe microscopy](/source/Scanning_probe_microscopy), instead of the description of nanorobots as [molecular machines](/source/Molecular_machines). Using the microscopy definition, even a large apparatus such as an [atomic force microscope](/source/Atomic_force_microscope) can be considered a nanorobotic instrument when configured to perform nanomanipulation. For this viewpoint, macroscale robots or microrobots that can move with nanoscale precision can also be considered nanorobots.

 [Kinesin](/source/Kinesin)  uses [protein domain dynamics](/source/Protein_domain_dynamics) on [nanoscales](/source/Nanoscopic_scale) to walk along a [microtubule](/source/Microtubule).

## "Swallowing the Surgeon"

Part of a series of articles on Molecular nanotechnology Mechanosynthesis Molecular assembler Molecular machine Brownian motor Productive nanosystems Nanorobotics Engines of Creation Science portal Technology portal v t e

According to [Richard Feynman](/source/Richard_Feynman), it was his former graduate student and collaborator [Albert Hibbs](/source/Albert_Hibbs) who originally suggested to him (circa 1959) the idea of a *medical* use for Feynman's theoretical micro-machines (see [biological machine](/source/Biological_machine)). Hibbs suggested that certain repair machines might one day be reduced in size to the point that it would, in theory, be possible for a patient to (as Feynman put it) "*[swallow the surgeon](/source/Molecular_machine#Biological)*". The idea was incorporated into Feynman's case study 1959 essay *[There's Plenty of Room at the Bottom](/source/There's_Plenty_of_Room_at_the_Bottom).*[15]

Since nano-robots would be microscopic in size, it would probably be necessary for very large numbers of them to work together to perform microscopic and macroscopic tasks.[*[citation needed](https://en.wikipedia.org/wiki/Wikipedia:Citation_needed)*] These nano-robot swarms, both those unable to [replicate](/source/Self-replicating_machine) (as in [utility fog](/source/Utility_fog)) and those able to replicate unconstrained in the natural environment (as in [grey goo](/source/Grey_goo) and [synthetic biology](/source/Synthetic_biology)), are found in many science fiction stories, such as the [Borg](/source/Borg) [nano-probes](/source/Nanoprobe_(Star_Trek)) in *[Star Trek](/source/Star_Trek)* and *[The Outer Limits](/source/The_Outer_Limits_(1995_TV_series))* episode "[The New Breed](/source/The_New_Breed_(The_Outer_Limits))".

Some proponents of nano-robotics, in reaction to the [grey goo](/source/Grey_goo) scenarios that they earlier helped to propagate, hold the view that nano-robots able to replicate outside of a restricted factory environment do not form a necessary part of a purported productive nanotechnology, and that the process of self-replication, were it ever to be developed, could be made inherently safe. They further assert that their current plans for developing and using molecular manufacturing do not in fact include free-foraging replicators.[16][17]

A detailed theoretical discussion of nanorobotics, including specific design issues such as sensing, power communication, [navigation](/source/Navigation), manipulation, [locomotion](/source/Robot_locomotion), and onboard [computation](/source/Computation), has been presented in the medical context of [nanomedicine](/source/Nanomedicine) by [Robert Freitas](/source/Robert_Freitas).[18][19] Some of these discussions[*[which?](https://en.wikipedia.org/wiki/Wikipedia:Avoid_weasel_words)*] remain at the level of unbuildable generality and do not approach the level of detailed engineering.

## Legal and ethical implications

### Open technology

A document with a proposal on nanobiotech development using [open design](/source/Open_design) technology methods, as in [open-source hardware](/source/Open-source_hardware) and [open-source software](/source/Open-source_software), has been addressed to the [United Nations General Assembly](/source/United_Nations_General_Assembly).[20] According to the document sent to the [United Nations](/source/United_Nations), in the same way that [open source](/source/Open_source) has in recent years accelerated the development of [computer](/source/Computer) systems, a similar approach should benefit the society at large and accelerate nanorobotics development. The use of [nanobiotechnology](/source/Nanobiotechnology) should be established as a human heritage for the coming generations, and developed as an open technology based on [ethical](/source/Ethical) practices for [peaceful](/source/Peace) purposes. Open technology is stated as a fundamental key for such an aim.[*[citation needed](https://en.wikipedia.org/wiki/Wikipedia:Citation_needed)*]

### Nanorobot race

In the same ways that technology [research and development](/source/Research_and_development) drove the [space race](/source/Space_race) and [nuclear arms race](/source/Nuclear_arms_race), a race for nanorobots is occurring.[21][22][23][24][25] There is plenty of ground allowing nanorobots to be included among the [emerging technologies](/source/Emerging_technologies).[26] Some of the reasons are that large corporations, such as [General Electric](/source/General_Electric), [Hewlett-Packard](/source/Hewlett-Packard), [Synopsys](/source/Synopsys), [Northrop Grumman](/source/Northrop_Grumman) and [Siemens](/source/Siemens) have been recently working in the development and research of nanorobots;[27][28][29][30][31] surgeons are getting involved and starting to propose ways to apply nanorobots for common medical procedures;[32] universities and research institutes were granted funds by government agencies exceeding $2 billion towards research developing nanodevices for medicine;[33][34] bankers are also strategically investing with the intent to acquire beforehand rights and royalties on future nanorobots commercialisation.[35] Some aspects of nanorobot litigation and related issues linked to monopoly have already arisen.[36][37][38] A large number of patents have been granted recently on nanorobots, mostly by patent agents, companies specializing solely on building patent portfolios, and lawyers. After a long series of patents and eventually litigations, see for example the [invention of radio](/source/Invention_of_radio), or the [war of currents](/source/War_of_currents), emerging fields of technology tend to become a [monopoly](/source/Monopoly), which normally is dominated by large corporations.[39]

## Approaches to manufacturing

Manufacturing nanomachines assembled from molecular components is a very challenging task. Because of the level of difficulty, many engineers and scientists continue working cooperatively across multidisciplinary approaches to achieve breakthroughs in this new area of development. The following techniques are currently applied towards manufacturing nanorobots:

### Biochip

Main article: [Biochip](/source/Biochip)

The joint use of [nanoelectronics](/source/Nanoelectronics), [photolithography](/source/Photolithography), and new [biomaterials](/source/Biomaterial) provides an approach to manufacturing nanorobots for common medical uses, such as surgical instrumentation, diagnosis, and drug delivery.[40][41][42] This method for manufacturing on nanotechnology scale is in use in the electronics industry since 2008.[43] So, practical nanorobots should be integrated as nanoelectronics devices, which will allow tele-operation and advanced capabilities for medical instrumentation.[44][45]

### Nubots

Main article: [DNA machine](/source/DNA_machine)

A *nucleic acid robot* (nubot) is an organic molecular machine at the nanoscale.[46] DNA structure can provide means to assemble 2D and 3D nanomechanical devices. DNA based machines can be activated using small molecules, proteins and other molecules of DNA.[47][48][49] Biological circuit gates based on DNA materials have been engineered as molecular machines to allow in-vitro drug delivery for targeted health problems.[50] Such material based systems would work most closely to smart biomaterial drug system delivery,[51] while not allowing precise in vivo teleoperation of such engineered prototypes.

### Surface-bound systems

Several reports show the attachment of [synthetic molecular motors](/source/Synthetic_molecular_motor) to surfaces.[52][53] These primitive nanomachines have been shown to undergo machine-like motions when confined to the surface of a macroscopic material. The surface anchored motors could potentially be used to move and position nanoscale materials on a surface in the manner of a conveyor belt.

### Positional nanoassembly

Nanofactory Collaboration,[54] founded by [Robert Freitas](/source/Robert_Freitas) and [Ralph Merkle](/source/Ralph_Merkle) in 2000 and involving 23 researchers from 10 organizations and 4 countries, focuses on developing a practical research agenda[55] specifically aimed at developing positionally-controlled diamond [mechanosynthesis](/source/Mechanosynthesis) and a [diamondoid](/source/Diamondoid) nanofactory that would have the capability of building diamondoid medical nanorobots.

### Biohybrids

See also: [Biohybrid microswimmer](/source/Biohybrid_microswimmer)

The emerging field of bio-hybrid systems combines biological and synthetic structural elements for biomedical or robotic applications. The constituent elements of bio-nanoelectromechanical systems (BioNEMS) are of nanoscale size, for example DNA, proteins or nanostructured mechanical parts. Thiol-ene e-beams resist allow the direct writing of nanoscale features, followed by the functionalization of the natively reactive resist surface with biomolecules.[56] Other approaches use a biodegradable material attached to magnetic particles that allow them to be guided around the body.[57]

### Bacteria-based

See also: [Bacterial motility](/source/Bacterial_motility)

This approach uses biological microorganisms, like the [bacterium](/source/Bacterium) *[Escherichia coli](/source/Escherichia_coli)*[58] and *[Salmonella typhimurium](/source/Salmonella_typhimurium)*.[59] Thus the model uses a flagellum for propulsion purposes. Electromagnetic fields normally control the motion of this kind of biological integrated device.[60] Chemists at the University of Nebraska have created a humidity gauge by fusing a bacterium to a silicon computer chip.[61]

### Virus-based

[Retroviruses](/source/Retrovirus) can be used to attach to [cells](/source/Cell_(biology)) and replace [DNA](/source/DNA). They go through a process called [reverse transcription](/source/Reverse_transcription) to deliver genetic packaging in a [vector](/source/Vector_(molecular_biology)).[62] Usually, these devices are Pol – Gag [genes](/source/Gene) of the [virus](/source/Virus) for the [Capsid](/source/Capsid) and Delivery system. This process is called [retroviral](/source/Retroviral) [gene therapy](/source/Gene_therapy), having the ability to re-engineer cellular DNA by usage of viral vectors.[63] This approach has appeared in the form of retroviral, [adenoviral](/source/Adenoviridae), and [lentiviral](/source/Lentivirus) gene delivery systems.[64][65] These gene therapy vectors have been used in cats to send genes into the [genetically modified organism](/source/Genetically_modified_organism) (GMO), causing it to display the trait.[66]

## Magnetic helical nanorobots

Scanning Electron Microscope image of a Helical nanomotor

Research led to the creation of helical silica particles coated with magnetic materials that can be maneuvered using a rotating magnetic field.[67]

Such nanorobots are not dependent on chemical reactions to fuel the propulsion. A triaxial [Helmholtz coil](/source/Helmholtz_coil) can provide directed rotating field in space. It was shown how such nanomotors can be used to measure viscosity of [non-newtonian fluids](/source/Non-newtonian_fluids) at a resolution of a few microns.[68] This technology promises creation of a viscosity map inside cells and the extracellular milieu. Such nanorobots move in blood.[69] Researchers have managed to controllably move such nanorobots inside cancer cells allowing them to trace out patterns inside a cell.[68] Nanorobots moving through the tumor microenvironment have demonstrated the presence of sialic acid in the cancer-secreted [extracellular matrix](/source/Extracellular_matrix).[70]

### Summary of helical nanorobots

A magnetic helical nanorobot consists of at least two components - one being a helical body, and the other being a magnetic material. The helical body provides a structure to the nanorobot capable of translation along the helical axis. The magnetic material, on the other hand, allows the structure to rotate by following an externally applied rotating magnetic field. Helical nanorobots use magnetic actuation and helical propulsion methods.[*[citation needed](https://en.wikipedia.org/wiki/Wikipedia:Citation_needed)*]

Magnetic helical nanorobots translate a rotational motion into translational movement through a fluid in low Reynolds number environments. These nanorobots have been inspired by naturally occurring microorganisms such as flagella, cilia, and Escheric coli (otherwise known as E. coli) which rotate in a helical wave.[71]

### Movement of magnetic helical nanorobots

One approach to the wireless manipulation of helical swimmers is through externally applied gradient rotation magnetic field. This can be done through Helmholtz coil as the helical swimmers are actuated by a rotating magnetic field. All magnetized objects within an externally imposed magnetic field will have both forces and torques exerted on them. The helical swimmers can rotate due the magnetic field received by the magnetic head and the forces acting upon it. Once the whole structure feels the field then the helical shape of its body converts this rotational movement into a propulsive force. Magnetic forces (fm) are proportional to the gradient of the magnetic field (∇B) on the magnetized object, and act to move the object to local maxima. Also, magnetic torques (τ) are proportional to the magnetic field (B) and act to align the internal magnetization of an object (M) with the field. The equations that express the interactions are as follows where V is the volume of the magnetized object.[72]

F = V ⋅ ( M ⋅ ∇ B ) {\displaystyle {\boldsymbol {F}}=V\cdot ({\boldsymbol {M}}\cdot \nabla {\boldsymbol {B}})} (Equation 1)

τ = V ⋅ ( M × B ) {\displaystyle {\boldsymbol {\tau }}=V\cdot ({\boldsymbol {M}}{\boldsymbol {\times }}{\boldsymbol {B}})} (Equation 2)

Equation one indicates that, increasing the volume of the magnetic material will increase the force experienced by the material proportionally. If the volume is doubled, the force will also double, assuming the magnetization (M) and the gradient of the magnetic field (∇B) remain constant. This would be the same for the torque of the magnetic material too since it is proportional to the volume.

This increase in magnetic dipoles enhances the overall magnetic response of the material to an external magnetic field, resulting in greater force and torque. Hence when the magnetic material gets bigger than the helical swimmer it can move faster.

### Movement of a helical swimmer with square magnetic head

To use the rotation magnetic field, a permanent magnet can be planted in the helical swimmer's head, whose magnetization direction would be perpendicular to the swimmer body. When a rotating magnetic field is applied, the swimmer's head experiences a magnetic torque, causing it to rotate. The helical shape converts this rotational movement into a propulsive force. As the swimmer's head rotates, its helical tail generates a force against the surrounding fluid, propelling it forward.[73] According to equation 2, the magnetic torque around the *x*-axis is zero

( M × B ) ∗ u x = 0 {\displaystyle ({\boldsymbol {M}}{\boldsymbol {\times }}{\boldsymbol {B}})*{\boldsymbol {ux}}=0}

at the initial position. After the magnet manipulator turns 45°, the magnetic field near the head position of the square magnet turns at an angle around the *x*-axis, as shown in

the figure below. If the square magnet stays in its initial position, it will be subject to a magnetic torque around the *x*-axis

( M × B ) ∗ u x ≠ 0 {\displaystyle ({\boldsymbol {M}}{\boldsymbol {\times }}{\boldsymbol {B}})*{\boldsymbol {ux}}\neq 0}

Thus, the helical swimmer will follow the magnetic field. If the magnet manipulator rotates one turn, the magnetic field near the head position of the swimmer projected on the plane *yoz* rotates a whole turn around the x-axis.[74] This results in the helical shape to move, resulting in propulsion as follows:

i p u s h = sin ⁡ φ i n sin ⁡ θ i n cos ⁡ φ i n cos ⁡ θ i n cos ⁡ φ i n {\displaystyle i_{push}=\sin {\varphi _{in}}\sin {\theta _{in}}\cos {\varphi _{in}}\cos {\theta _{in}}\cos {\varphi _{in}}}

This propulsion helps the helical structure to rotate with the angle of the force. As a result, the magnetic robot rotates around the *x*-axis by the action of the rotating magnetic field.

### Example biomedical applications

Due to its small scale and helical shape providing propulsion, helical swimmers can be used in some biomedical applications such as; targeted drug delivery and targeted cell delivery. In 2018, there was a proposed biocompatible and biodegradable chistosan-based helical micro/nanoswimmer loaded with doxorubicin (DOX), a common anticancer drug that was designed to deliver its payload to a desired location. Using 3.4 × 10–1 W/cm2 intensity UV light radiation, when the swimmer approached the target location, a dose of 60% of the total DOX was released within 5 minutes. However, it was seen that the dosage release rate slowed down after the initial 5 minutes that were reported. This was theorized to be caused by a decreasing diffusion rate of DOX molecules coming from the center of the swimmer.[75] Another group's spirulina-based helical micro/nanoswimmer also carrying DOX used a different method for controlled drug release. Once the swimmer had reached its destination, near-infrared (NIR) laser irradiation was used to heat up the location to dissolve the swimmer into individual particles, releasing the drug in the process. Through multiple tests, it was found that weak acidic external environments led to an increase in the dosage release rate.[76]

Using magnetic helical micro/nanorobots for cell transport can also lead to opportunities in solving male infertility, repairing damaged tissue, and cell assembly. In 2015, a helical micro-/nanomotor with a holding ring on the head was used to successfully capture and transport sperm cells with motion deficiencies. The helix device would approach the sperm cell's tail and confine it with the body of the micro-/nanomotor. It would then use the holding ring to loosely capture the head of the sperm cell to prevent escape. After reaching the target location, the sperm cell would be released into the membrane of the oocyte by reversing the rotation of the helix device. This strategy was considered to be an efficient strategy while also reducing risk of damage to the sperm cells.[77]

### 3D printing

Main article: [3D printing](/source/3D_printing)

3D printing is the process by which a three-dimensional structure is built through the various processes of additive manufacturing. Nanoscale 3D printing involves many of the same process, incorporated at a much smaller scale. To print a structure in the 5-400 μm scale, the precision of the 3D printing machine needs to be improved greatly. A two-step process of 3D printing, using a 3D printing and laser etched plates method was incorporated as an improvement technique.[78] To be more precise at a nanoscale, the 3D printing process uses a laser etching machine, which etches the details needed for the segments of nanorobots into each plate. The plate is then transferred to the 3D printer, which fills the etched regions with the desired [nanoparticle](/source/Nanoparticle). The 3D printing process is repeated until the nanorobot is built from the bottom up.

This 3D printing process has many benefits. First, it increases the overall accuracy of the printing process.[*[citation needed](https://en.wikipedia.org/wiki/Wikipedia:Citation_needed)*] Second, it has the potential to create functional segments of a nanorobot.[78] The 3D printer uses a liquid resin, which is hardened at precisely the correct spots by a focused laser beam. The focal point of the laser beam is guided through the resin by movable mirrors and leaves behind a hardened line of solid polymer, just a few hundred nanometers wide. This fine resolution enables the creation of intricately structured sculptures as tiny as a grain of sand. This process takes place by using photoactive resins, which are hardened by the laser at an extremely small scale to create the structure. This process is quick by nanoscale 3D printing standards. Ultra-small features can be made with the 3D micro-fabrication technique used in multiphoton photopolymerisation. This approach uses a focused laser to trace the desired 3D object into a block of gel. Due to the nonlinear nature of photo excitation, the gel is cured to a solid only in the places where the laser was focused while the remaining gel is then washed away. Feature sizes of under 100 nm are easily produced, as well as complex structures with moving and interlocked parts.[79]

## Challenges in designing nanorobots

Several challenges must be addressed when designing and building nanoscale machines with movable parts. The most obvious is the need to develop very fine tools and manipulation techniques capable of assembling individual nanostructures with high precision into an operational device. A less evident challenge relates to the peculiarities of adhesion and friction at the nanoscale. It is impossible to simply scale down the design of a macroscopic device with movable parts. This approach will not work because the high surface energy of nanostructures causes all contacting parts to stick together to minimize energy. The adhesion and static friction between parts can easily exceed the strength of the materials, causing them to break before any movement occurs. This necessitates designing movable structures with minimal contact area.[80]

In spite of the fast development of nanorobots, those designed for [drug delivery](/source/Drug_delivery) purposes have "a long way to go before their commercialization and clinical applications can be achieved."[81][82]

## Potential uses

See also: [Applications of nanotechnology](/source/Applications_of_nanotechnology)

### Nanomedicine

Main article: [Nanomedicine](/source/Nanomedicine)

Potential uses for nanorobotics in [medicine](/source/Medicine) include early diagnosis and targeted drug-delivery for [cancer](/source/Cancer),[83][84][85] biomedical instrumentation,[86] [surgery](/source/Surgery),[87][88] [pharmacokinetics](/source/Pharmacokinetics),[10] monitoring of [diabetes](/source/Diabetes),[89][90][91] and health care.

In such plans, future [medical nanotechnology](/source/Medical_nanotechnology) is expected to employ nanorobots injected into the patient to perform work at a cellular level. Such nanorobots intended for use in medicine should be non-replicating, as replication would needlessly increase device complexity, reduce reliability, and interfere with the medical mission.

Nanotechnology provides a wide range of new technologies for developing customized means to optimize the delivery of [pharmaceutical drugs](/source/Pharmaceutical_drug). Today, harmful side effects of treatments such as [chemotherapy](/source/Chemotherapy) are commonly a result of drug delivery methods that don't pinpoint their intended target cells accurately.[92] Researchers at [Harvard](/source/Harvard) and [MIT](/source/MIT), however, have been able to attach special [RNA](/source/RNA) strands, measuring nearly 10 nm in diameter, to nanoparticles, filling them with a chemotherapy drug. These RNA strands are attracted to [cancer cells](/source/Cancer_cell). When the nanoparticle encounters a cancer cell, it adheres to it, and releases the drug into the cancer cell.[93] This directed method of drug delivery has great potential for treating cancer patients while avoiding negative effects (commonly associated with improper drug delivery).[92][94] The first demonstration of nanomotors operating in living organisms was carried out in 2014 at University of California, San Diego.[95] MRI-guided [nanocapsules](/source/Nanocapsule) are one potential precursor to nanorobots.[96]

Another useful application of nanorobots is assisting in the repair of tissue cells alongside [white blood cells](/source/White_blood_cell).[97] Recruiting inflammatory cells or white blood cells (which include [neutrophil granulocytes](/source/Neutrophil_granulocyte), [lymphocytes](/source/Lymphocyte), [monocytes](/source/Monocyte), and [mast cells](/source/Mast_cell)) to the affected area is the first response of tissues to injury.[98] Because of their small size, nanorobots could attach themselves to the surface of recruited white cells, to squeeze their way out through the walls of [blood vessels](/source/Blood_vessel) and arrive at the injury site, where they can assist in the tissue repair process. Certain substances could possibly be used to accelerate the recovery.[*[citation needed](https://en.wikipedia.org/wiki/Wikipedia:Citation_needed)*]

The science behind this mechanism is quite complex. Passage of cells across the blood [endothelium](/source/Endothelium), a process known as transmigration, is a mechanism involving engagement of cell surface receptors to adhesion molecules, active force exertion and [dilation](/source/Vasodilation) of the vessel walls and physical deformation of the migrating cells. By attaching themselves to migrating [inflammatory](/source/Inflammation) cells, the robots can in effect "hitch a ride" across the blood vessels, bypassing the need for a complex transmigration mechanism of their own.[97]

As of 2016[\[update\]](https://en.wikipedia.org/w/index.php?title=Nanorobotics&action=edit), in the United States, [Food and Drug Administration](/source/Food_and_Drug_Administration) (FDA) regulates [nanotechnology](/source/Nanotechnology) on the basis of size.[99]

Nanocomposite particles that are controlled remotely by an [electromagnetic field](/source/Electromagnetic_field) was also developed.[100] This series of nanorobots that are now enlisted in the [Guinness World Records](/source/Guinness_World_Records),[100] can be used to interact with the [biological cells](/source/Cell_(biology)).[101] Scientists suggest that this technology can be used for the treatment of [cancer](/source/Cancer).[102][70][103]

Magnetic nanorobots have demonstrated capabilities to prevent and treat antimicrobial resistant bacteria. Application of [nanomotor](/source/Nanomotor) implants have been proposed to achieve thorough disinfection of the dentine.[104][105]

### Cultural references

This subsection may contain irrelevant references to popular culture. Please help improve it by removing such content and adding citations to reliable, independent sources. (September 2020)

The Nanites are characters on the TV show *[Mystery Science Theater 3000](/source/Mystery_Science_Theater_3000)*. They're self-replicating, bio-engineered organisms that work on the ship and reside in the SOL's computer systems. They made their first appearance in Season 8.

Nanites are used in a number of episodes in the television series *[Travelers](/source/Travelers_(TV_series))*. They be programmed and injected into injured people to perform repairs, and first appear in season 1.

Nanites also feature in the [*Rise of Iron*](/source/Destiny%3A_Rise_of_Iron) 2016 expansion for the video game *[Destiny](/source/Destiny_(video_game))* in which SIVA, a self-replicating nanotechnology is used as a weapon.

Nanites (referred to more often as nanomachines) are often referenced in [Konami](/source/Konami)'s *[Metal Gear](/source/Metal_Gear)* series, being used to enhance and regulate abilities and body functions.

In the *[Star Trek](/source/Star_Trek)* franchise TV shows nanites play an important plot device. Starting with "[Evolution](/source/Evolution_(Star_Trek%3A_The_Next_Generation))" in the third season of *[The Next Generation](/source/Star_Trek%3A_The_Next_Generation)*, [Borg Nanoprobes](/source/Borg#Nanoprobes) perform the function of maintaining the Borg cybernetic systems, as well as repairing damage to the organic parts of a Borg. They generate new technology inside a Borg when needed, as well as protecting them from many forms of disease.

Nanites play a role in the *[Deus Ex](/source/Deus_Ex)* video game series, being the basis of the nano-augmentation technology which gives augmented people superhuman abilities.

Nanites are also mentioned in the [Arc of a Scythe](/source/Arc_of_a_Scythe) book series by [Neal Shusterman](/source/Neal_Shusterman) and are used to heal all nonfatal injuries, regulate bodily functions, and considerably lessen pain.

Nanites are also an integral part of *[Stargate SG1](/source/Stargate_SG1)* and *[Stargate Atlantis](/source/Stargate_Atlantis)*, where [grey goo](/source/Grey_goo) scenarios are portrayed.

Nanomachines are central to the plot of the [*Silo* book series](/source/Silo_(series)), in which they are used as a weapon of mass destruction propagated via the air, and enter undetected into the human body where, when receiving a signal, they kill the recipient. They are then used to wipe out the majority of the human race.

## See also

- [Diamondoid](/source/Diamondoid)

- [Microswimmer](/source/Microswimmer)

- [Molecular machine](/source/Molecular_machine)

- [Nanoelectromechanical systems](/source/Nanoelectromechanical_systems)

- [Nanomotors](/source/Nanomotors)

- [Programmable matter](/source/Programmable_matter)

## References

1. **[^](#cite_ref-1)** Vaughn JR (2006). "Over the Horizon: Potential Impact of Emerging Trends in Information and Communication Technology on Disability Policy and Practice". *National Council on Disability, Washington DC*: 1–55.

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1. ^ [***a***](#cite_ref-nanorobotdesign.com_97-0) [***b***](#cite_ref-nanorobotdesign.com_97-1) Casal, Arancha *et al.* (2004) ["Nanorobots As Cellular Assistants in Inflammatory Responses"](http://www.nanorobotdesign.com/papers/nanoroboticsBCATS2003.pdf). nanorobotdesign.com

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1. **[^](#cite_ref-104)** Dasgupta, Debayan; Peddi, Shanmukh; Saini, Deepak Kumar; Ghosh, Ambarish (2022-05-04). ["Mobile Nanobots for Prevention of Root Canal Treatment Failure"](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7613116). *Advanced Healthcare Materials*. **11** (14) 2200232. [doi](/source/Doi_(identifier)):[10.1002/adhm.202200232](https://doi.org/10.1002%2Fadhm.202200232). [ISSN](/source/ISSN_(identifier)) [2192-2640](https://search.worldcat.org/issn/2192-2640). [PMC](/source/PMC_(identifier)) [7613116](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7613116). [PMID](/source/PMID_(identifier)) [35481942](https://pubmed.ncbi.nlm.nih.gov/35481942).

1. **[^](#cite_ref-105)** ["Tiny bots that can deep clean teeth"](https://medicalxpress.com/news/2022-05-tiny-bots-deep-teeth.html). 2022-05-18.

## Further reading

- [Haken, Hermann](/source/Hermann_Haken); Paul, Levi (2012). *Synergetic Agents: From Multi-Robot Systems to Molecular Robotics*. Weinheim, Germany: Wiley-VCH. [ISBN](/source/ISBN_(identifier)) [978-3-527-41166-5](https://en.wikipedia.org/wiki/Special:BookSources/978-3-527-41166-5). [OCLC](/source/OCLC_(identifier)) [812066392](https://search.worldcat.org/oclc/812066392).

## External links

**Nanorobotics**  at Wikipedia's [sister projects](https://en.wikipedia.org/wiki/Wikipedia:Wikimedia_sister_projects)

- [Definitions](https://en.wiktionary.org/wiki/nanorobotics) from Wiktionary
- [Media](https://commons.wikimedia.org/wiki/Category:Nanorobotics) from Commons
- [Textbooks](https://en.wikibooks.org/wiki/Special:Search/Nanorobotics) from Wikibooks
- [Resources](https://en.wikiversity.org/wiki/Special:Search/Nanorobotics) from Wikiversity

- [A Review in Nanorobotics – US Department of Energy](https://www.osti.gov/energycitations/product.biblio.jsp?osti_id=875622)

v t e Mobile robots and uncrewed vehicles Aerial Unmanned aerial vehicle (UAV) Unmanned combat air vehicle (UCAV) Aerobot Helicam List of unmanned aerial vehicle applications Ornithopter Ground Walking Humanoid Android Hexapod list Other Unmanned ground vehicle (UGV) Automated guided vehicle (AGV) Self-driving car Automatic train operation (ATO) list Underwater Unmanned underwater vehicle (UUV) Autonomous underwater vehicle (AUV) Intervention AUV (I-AUV) Remotely operated underwater vehicle (ROUV) Underwater glider Surface Unmanned surface vehicle (USV) Space Uncrewed spacecraft list of probes list by program list of orbiters Cargo spacecraft spaceflights to the ISS Space telescope list Other Domestic Military Rescue Medical Disability Agricultural BEAM robotics Microbotics Nanorobotics Robotics Robot locomotion Autonomous robot Autonomous logistics Radio-controlled model Remote control vehicle Remote control animal Categories Radio control Unmanned vehicles

v t e Robotics Main articles Outline Glossary Index History Geography Hall of Fame Ethics Laws Competitions AI competitions Types Aerobot Anthropomorphic Humanoid Android Cyborg Gynoid Claytronics Companion Automaton Animatronic Audio-Animatronics Industrial Articulated arm Delivery Domestic Educational Entertainment Juggling Military Medical Service Disability Agricultural Food service Retail BEAM robotics Soft robotics Classifications Biorobotics Cloud robotics Continuum robot Unmanned vehicle aerial ground Mobile robot Microbotics Nanorobotics Necrobotics Robotic spacecraft Space probe Swarm Telerobotics Underwater remotely-operated Robotic fish Locomotion Tracks Walking Hexapod Climbing Electric unicycle Robotic fins Navigation and mapping Motion planning Simultaneous localization and mapping Visual odometry Vision-guided robot systems Algorithms Reinforcement learning Vision-language-action model Artificial neural network Research Evolutionary Kits Simulator Suite Open-source Software Adaptable Developmental Human–robot interaction Paradigms Perceptual Situated Ubiquitous Companies ABB Amazon Robotics Anybots Barrett Technology Boston Dynamics Daxbot Doosan Robotics Energid Technologies FarmWise FANUC Figure AI Foster-Miller Fourier Harvest Automation HD Hyundai Robotics Honeybee Robotics Intuitive Surgical IRobot KUKA Rainbow Robotics Robomow Starship Technologies Stäubli Symbotic Universal Robotics Wolf Robotics Waymo Zoox Yaskawa Agility Robotics Unitree Robotics 1X Technologies AgiBot Deep Robotics Engine AI Roborock UBtech Robotics Neura Robotics Fastbrick Robotics Universal Robots White Box Robotics Tesla inc. Welltec KUKA Related Critique of work Powered exoskeleton Workplace robotics safety Robotic tech vest Technological unemployment Terrainability Fictional robots List of robotics software Moravec's paradox Artificial general intelligence Category Outline

v t e Emerging technologies Fields Manufacturing 3D microfabrication 3D printing 3D publishing Claytronics Molecular assembler Smart manufacturing Utility fog Materials science Aerogel Amorphous metal Artificial muscle Conductive polymer Femtotechnology Fullerene Graphene High-temperature superconductivity High-temperature superfluidity Linear acetylenic carbon Metamaterials Metamaterial cloaking Metal foam Multi-function structures Nanotechnology Carbon nanotubes Molecular nanotechnology Nanomaterials Picotechnology Programmable matter Quantum dots Silicene Synthetic diamond Robotics Domotics Nanorobotics Powered exoskeleton Self-reconfiguring modular robot Swarm robotics Uncrewed vehicle Topics Automation Collingridge dilemma Differential technological development Disruptive innovation Ephemeralization Ethics AI Bioethics Cyberethics Neuroethics Robot ethics Exploratory engineering Proactionary principle Technological change Technological unemployment Technological convergence Technological evolution Technological paradigm Technology forecasting Accelerating change Future-oriented technology analysis Horizon scanning Moore's law Technological singularity Technology scouting Technology in science fiction Technology readiness level Technology roadmap Transhumanism List

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Adapted from the Wikipedia article [Nanorobotics](https://en.wikipedia.org/wiki/Nanorobotics) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Nanorobotics?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.