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Author: thomas lebrun
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1. Significantly Improved Trapping Lifetime of Nanoparticles in an Optical Trap using Feedback Control
Published: 4/10/2012
Authors: Arvind Kumar Balijepalli, Thomas W LeBrun, Jason John Gorman
Abstract: We demonstrate an increase in trapping lifetime for optically trapped nanoparticles by more than an order of magnitude using feedback control. This has been demonstrated through simu- lation and experimental results for 100, nm gold particles and 3 ...

2. Feedback Control of Optically Trapped Particles
Published: 12/17/2011
Authors: Jason John Gorman, Arvind Kumar Balijepalli, Thomas W LeBrun
Abstract: Optical trapping is a method for manipulating micro- and nanoscale particles that is widely used in biophysics and colloid science, among other areas. This method uses optical forces to confine the position of a particle to a localized region, which ...

3. Accurate Stochastic Simulations Using Graphics Hardware: Nanoassembly With the Optical Tweezers
Published: 3/1/2010
Authors: Arvind Kumar Balijepalli, Thomas W LeBrun, Satyandra K. Gupta
Abstract: Significant speedup is possible when using the Graphics Processing Unit (GPU) for stochastic particle simulations. A simulation of freely diffusing spherical particles using Langevin's equation has been developed and the results from the CPU an ...

4. A Flexible System Framework for a Nanoassembly Cell Using Optical Tweezers
Published: 1/1/2006
Authors: Arvind Kumar Balijepalli, Thomas W LeBrun, Satyandra K. Gupta
Abstract: The optical tweezers instrument is a unique tool for directed assembly of nanocomponents. In order to function as a viable nanomanufacturing tool, a software architecture is needed to run the optical tweezers hardware, provide an effective user inter ...

5. Three-dimensional Scanning Optical Tweezers
Published: 12/5/2005
Authors: Thomas W LeBrun, T W. Hwang, I Y Park, Jun-Feng Song, Yong-Gu Lee, Nicholas G Dagalakis, Cedric Gagnon, Arvind Kumar Balijepalli
Abstract: There are several new tools for manipulating microscopic objects. Among them, optical tweezers (OT) has two distinguishing advantages. Firstly, OT can easily release an object without the need of a complicated detaching scheme. Secondly, it is antici ...

6. A Modular System Architecture for Agile Assembly of Nanocomponents using Optical Tweezers
Published: 9/10/2005
Authors: Arvind Kumar Balijepalli, Thomas W LeBrun, Cedric Gagnon, Yong-Gu Lee, Nicholas G Dagalakis
Abstract: In order to realize the flexibility optical trapping offers as a nanoassembly tool, we need to develop natural and intuitiveinterfaces to assemble large quantities of nanocomponents quickly and cheaply. We propose a system to create such aninterface ...

7. A Modular System Architecture for Agile Assembly of Nano-Components using Optical Tweezers
Published: 9/1/2005
Authors: Arvind Kumar Balijepalli, Thomas W LeBrun, et al

8. Characterization of Optical Traps Using On-Line Estimation Methods
Published: 8/26/2005
Authors: Jason John Gorman, Thomas W LeBrun, et al
Abstract: System identification methods are presented for the estimation of the characteristic frequency of an optically trapped particle. These methods are more amenable to automated on-line measurements and are believed to be less prone to erroneous results ...

9. Development of Multiple Beam Optical Tweezers
Published: 6/1/2005
Authors: Dongjin Lee, Thomas W LeBrun, Arvind Kumar Balijepalli, Jason John Gorman, Cedric Gagnon, Daehie Hong, Esther H Chang
Abstract: This paper presents the design of a multiple beam optical tweezers instrument used for manipulating micro/nano-sized components. The basic equations used in designing the optical tweezers are derived and the stable and time-sharing multiple beam opti ...

10. Virtual Environment for Manipulating Microscopic Particles with Optical Tweezer
Published: 7/1/2003
Authors: Thomas W LeBrun, Kevin W Lyons, Yong-Gu Lee
Abstract: In this paper, we use virtual reality techniques to define an intuitive interface to a nanoscale manipulation device. This device utilizes optical methods to focus laser light to trap and reposition nano-to-microscopic particles. The underlying physi ...

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