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Nanoscale plasmonic motor
== Introduction ==
The increased demands in microtechnology and nanotechnology has been triggering the vast interests and opportunities for the developments of various micro- (MEMS) and nano-(NEMS) mechanical system based products. One of the features of this technology is its unique ability to imitate various natural phenomena. For example, biomedical engineering has succeeded to replace and increase the function of damaged or diseased organs,〔Ashutosh A.; Henry H. Journal of Nanotechnology in Engineering and Medecine, Vol 1,February,2010〕 by designing the artificial ones using the nanoscale approach.The science behind the nanotechnology help them to design devices used for transplantation in medicine, suggesting that one should understand how nanoscale devices work by exploring living cells and its working principles. It could certainly inspire the ideas behind the design of powerful devices. Mechanism of auto-regeneration of energy by microorganisms has drawn attention to understand how energy can be generated from nanomaterials.As demonstrated in the splendid works of various researchers, nanotechnology has a great ability to power and improve several natural biological devices by replacing those enitities and mimicking natural processes within the living being.The primary concern behind such an approach is to provide an alternative source with higher ability under controlled environment.One of the breakthrough discoveries among them is nanomotor,a tiny device which has the ability to convert various forms of energy into motion using approaches observed in nature. The discovery in this field explains the use of wave and particle properties together to make the nanomotor work. This leads to observation of the so-called plasmonic nanomotor using the properties of plasmon to make the nanomotor work.〔Brongersma M.L., Zia R., Schuller J.A., Applied Physics A: Materials Science & Processing,89,221-223(2007)〕 Researchers with the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory and the University of California (UC) Berkeley have created the first nano-sized light mill motor whose rotational speed and direction can be controlled by tuning the frequency of the incident light waves.
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