Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Scientists come up with light-driven motors to power nanorobots of the future: Researchers from Russia and Ukraine propose a nanosized motor controlled by a laser with potential applications across the natural sciences and medicine

This is the operating principle of the proposed translational photomotor.
CREDIT
Image courtesy of the MIPT press office.
This is the operating principle of the proposed translational photomotor. CREDIT Image courtesy of the MIPT press office.

Abstract:
Scientists from the Moscow Institute of Physics and Technology (MIPT), Semenov Institute of Chemical Physics of the Russian Academy of Sciences (ICP RAS), and Chuiko Institute of Surface Chemistry of the National Academy of Sciences of Ukraine (ISC NASU) have proposed a model nanosized dipole photomotor based on the phenomenon of light-induced charge redistribution. Triggered by a laser pulse, this tiny device is capable of directed motion at a record speed and is powerful enough to carry a certain load. The research findings were published in the Journal of Chemical Physics.

Scientists come up with light-driven motors to power nanorobots of the future: Researchers from Russia and Ukraine propose a nanosized motor controlled by a laser with potential applications across the natural sciences and medicine

Moscow, Russia | Posted on November 11th, 2016

"The unprecedented characteristics of dipole photomotors based on semiconductor nanoclusters offer the prospect of more than just addressing a certain scarcity of the translational photomotors family. These devices could actually be applied wherever rapid nanoparticle transport is required. In chemistry and physics, they could help develop new analytical and synthetic instruments, while in biology and medicine they could be used to deliver drugs to diseased tissues, improve gene therapy strategies, and so on," says Prof. Leonid Trakhtenberg of the Department of Molecular and Chemical Physics at MIPT, who is the leader of the research team and the head of the Laboratory of Functional Nanocomposites at ICP RAS.

Prof. Trakhtenberg collaborated with Prof. Viktor Rozenbaum, who heads the Department of Theory of Nanostructured Systems at ISC NASU, to develop the theory of photoinduced molecular transport. This theory provides a framework for the design of nanomachines, whose motion can be controlled by a laser. The scientists have established the relationship between several model parameters (e.g., particle dimensions, photoexcitation conditions etc.) and the key performance characteristic of the device--its average velocity.

Brownian motors

Directed nanomotors have prototypes in nature. Living organisms make use of protein devices driven by external nonequilibrium processes of a different nature, which are known as Brownian, or molecular motors. They are capable of converting random Brownian motion into directed translational motion, reciprocation, or rotation. Brownian motors are involved in muscle contraction, cell mobility (flagellar motility of bacteria), and the intra- and intercellular transport of organelles and relatively large particles of various substances (e.g., phagocytosis, or "cell eating", and elimination of metabolic waste products from the cell). These devices operate with an amazingly high efficiency approaching 100%.

"Understanding the underlying mechanisms of the operation of naturally occurring molecular motors enables us not only to replicate them but also to design new highly efficient multifunctional artificial devices that could eventually be applied in nanorobotics. For the last several decades, researchers and engineers in various fields have been working together and making some real progress towards the development of controllable nanomachines. The results of their work were recognized as a highly relevant achievement and a significant advance in science and technology, when the 2016 Nobel Prize in Chemistry was awarded 'for the design and synthesis of molecular machines,'" says Prof. Rozenbaum.

A Brownian motor operates by switching between at least two discrete states, which is achieved by means of chemical reactions, thermal action, AC signals, or light pulses. In the latter case, the device is referred to as a photomotor.

About ten years ago, a model was developed to describe the work of a translational dipole photomotor that operates due to photoexcitation of the molecule (particle) into a state with a dipole moment different from that in the ground state. The larger the difference between the total dipole moments of the nanoparticle in the two energy states, the higher the average velocity and efficiency of the motor.

Laser triggering

The proposed motor is activated by a resonant laser pulse, which excites electrons in the cylinder-shaped semiconductor nanocluster causing a separation of charges and giving rise to an electrostatic interaction between the particle and the polar substrate. Subjecting the nanocylinder to periodic resonant laser pulses causes its potential energy in the field of the substrate to vary with time, which in turn enables directed motion (see diagram).

Photomotors based on inorganic nanoparticles outperform their organic molecule based counterparts in terms of efficiency and average velocity. In a cylinder-shaped semiconductor nanocluster, the value of the dipole moment before irradiation is close to zero, but photoexcitation of an electron from the bulk to the surface gives rise to an enormous dipole moment (approx. 40 D for a cylinder with a height of ca 15 ).

"Owing to the fact that the parameters of the device have been optimized, our proposed model photomotor based on a semiconductor nanocylinder moves at a record speed of 1 mm/s, which is approximately three orders of magnitude faster than similar models based on organic molecules or motor proteins in living organisms," the authors of the study told us.

####

For more information, please click here

Contacts:
Nicolas

Copyright © Moscow Institute of Physics and Technology

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nano Global, Arm Collaborate on Artificial Intelligence Chip to Drive Health Revolution by Capturing and Analyzing Molecular Data in Real Time November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Robotics

DNA triggers shape-shifting in hydrogels, opening a new way to make 'soft robots' September 21st, 2017

Acting like a muscle, nano-sized device lifts 165 times its own weight September 1st, 2017

Silk could improve sensitivity, flexibility of wearable body sensors August 20th, 2017

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

Possible Futures

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nano Global, Arm Collaborate on Artificial Intelligence Chip to Drive Health Revolution by Capturing and Analyzing Molecular Data in Real Time November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Molecular Machines

How to draw electricity from the bloodstream: A one-dimensional fluidic nanogenerator with a high power-conversion efficiency September 11th, 2017

First 3-D observation of nanomachines working inside cells: Researchers headed by IRB Barcelona combine genetic engineering, super-resolution microscopy and biocomputation to allow them to see in 3-D the protein machinery inside living cells January 27th, 2017

Micro-bubbles make big impact: Research team develops new ultrasound-powered actuator to develop micro robot November 25th, 2016

HKU chemists develop world's first light-seeking synthetic Nanorobot November 9th, 2016

Molecular Nanotechnology

Spinning strands hint at folding dynamics: Rice University lab uses magnetic beads to model microscopic proteins, polymers October 17th, 2017

Assembly of nanoparticles proceeds like a zipper: Viruses and nanoparticles can be assembled into processable superlattice wires according to scientists from Aalto University Finland September 25th, 2017

First 3-D observation of nanomachines working inside cells: Researchers headed by IRB Barcelona combine genetic engineering, super-resolution microscopy and biocomputation to allow them to see in 3-D the protein machinery inside living cells January 27th, 2017

Captured on video: DNA nanotubes build a bridge between 2 molecular posts: Research may lead to new lines of direct communication with cells January 9th, 2017

Nanomedicine

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Nanobiotix presented new clinical and pre-clinical data confirming NBTXR3s significant potential role in Immuno-Oncology at SITC Annual Meeting November 14th, 2017

Arrowhead to Present at 29th Annual Piper Jaffray Healthcare Conference November 14th, 2017

A new way to mix oil and water: Condensation-based method developed at MIT could create stable nanoscale emulsions November 8th, 2017

Discoveries

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Announcements

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nano Global, Arm Collaborate on Artificial Intelligence Chip to Drive Health Revolution by Capturing and Analyzing Molecular Data in Real Time November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Photonics/Optics/Lasers

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Math gets real in strong, lightweight structures: Rice University researchers use 3-D printers to turn century-old theory into complex schwarzites November 16th, 2017

Practical superconducting nanowire single photon detector with record detection efficiency over 90 percent November 9th, 2017

Metal-silicone microstructures could enable new flexible optical and electrical devices: Laser-based method creates force-sensitive, flexible microstructures that conduct electricity November 1st, 2017

Research partnerships

Nano Global, Arm Collaborate on Artificial Intelligence Chip to Drive Health Revolution by Capturing and Analyzing Molecular Data in Real Time November 21st, 2017

EC Project Aims at Creating and Commercializing Cyber-Physical-System Solutions November 14th, 2017

Leti Joins DARPA-Funded Project to Develop Implantable Device for Restoring Vision November 9th, 2017

Nanoshells could deliver more chemo with fewer side effects: In vitro study verifies method for remotely triggering release of cancer drugs November 8th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project