June 22, 2008
June 22, 2008
June 25, 2008
13.187.1 - 13.187.12
An Interactive Virtual Reality Simulation for Nanoparticle Manipulation for Nano- assembly using Optical Tweezers
Nanotechnology and nanodevices is believed to be one of the most promising steps that science is taking to the future. This paper proposes virtual reality (VR) as a tool to simulate nanoparticle- manipulation using optical tweezers towards achieving nano- assembly for effectively handle issues such as difficulty in viewing, perceiving and controlling the nano-scale objects. The nano- simulation is modeled, using virtual reality, displaying all the forces acting on nanoparticle during the manipulation. The simulation is developed for particles that belong to Rayleigh region and, represents interactions of OT (a laser beam) with the nanoparticle. The laser beam aimed on to the nanoparticle traps the particle by applying optical forces. The trapped particle is then moved by moving the laser beam. The proposed VR based simulation tool with it capabilities l can be easily extended and used for creating and open system framework by connecting it to a real OT setup to control nanoparticles manipulation. In addition, a feedback system can be build to increase of precision of movement.
Keywords: Virtual Reality, Optical Tweezers
Scanning Tunneling Microscopy (STM) , Atomic Force Microscopy (AFM)  and Optical Tweezers (OT) are some techniques used for nanoparticle manipulation. AFM is a contact method for nanoparticle manipulation. This method has limitations such as wear of the tool tip and particle getting stuck to the tip of the AFM probe making it difficult to release the particle at difficult at desired location. While STM is a non-contact method, it can work only in vacuum conditions and is restricted to conducting and semi-conducting materials. The above discussed drawbacks along with incapability to manipulate particle in X, Y and Z directions make AFM and STM less desirable for effective nanoparticle manipulation. The disadvantages can be overcome by using OT as a manipulation technique. OT is a non contact method which can be used to grab, move and release particles in three dimensional (3-D) space. In addition, the magnitude of forces in OT is very small of the magnitude of pico and nano Newton which can make OT the most desirable method for manipulating nanoparticles.
The transformation of OT from single particle manipulation [3, 4] to several particle manipulations towards nanoassembly has progressed significantly. OT is being experimented with several techniques such as Chemical assembly  and Holographic Optical Tweezers  to achieve nanoassembly. The applications of OT range from bio-medical sciences to chemistry to technology.
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