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题名: Optical Spectrum and Electric Field Waveform Dependent Optically-Induced Dielectrophoretic (ODEP)Micro-Manipulation
作者: Liang WF(梁文峰); Wang SE(王淑娥); Dong ZL(董再励); Li GB(李国宾); Li WR(李文荣)
作者部门: 机器人学研究室
关键词: optically-induced dielectrophoresis ; ODEP force ; dielectrophoresis ; DEP force ; micro-manipulation ; micro-assembly
刊名: Micromachines
ISSN号: 2072-666X
出版日期: 2012
卷号: 3, 期号:2, 页码:492-508
收录类别: SCI ; EI
产权排序: 1
摘要: In the last seven years, optoelectronic tweezers using optically-induced dielectrophoretic (ODEP) force have been explored experimentally with much success in manipulating micro/nano objects. However, not much has been done in terms of in-depth understanding of the ODEP-based manipulation process or optimizing the input physical parameters to maximize ODEP force. We present our work on analyzing two significant influencing factors in generating ODEP force on a-Si:H based ODEP chips: (1) the waveforms of the AC electric potential across the fluidic medium in an ODEP chip based microfluidic platform; and (2) optical spectrum of the light image projected onto the ODEP chip. Theoretical and simulation results indicate that when square waves are used as the AC electric potential instead of sine waves, ODEP force can double. Moreover, numerical results show that ODEP force increases with increasing optical frequency of the projected light on an ODEP chip following the Fermi-Dirac function, validating that the optically-induced dielectrophoresis force depends strongly on the electron-hole carrier generation phenomena in optoelectronic materials. Qualitative experimental results that validate the numerical results are also presented in this paper.
语种: 英语
WOS记录号: WOS:000325015500021
WOS标题词: Science & Technology ; Technology
类目[WOS]: Nanoscience & Nanotechnology ; Instruments & Instrumentation
关键词[WOS]: AMORPHOUS-SILICON ; CELL ; MICROPARTICLES ; NANOPARTICLES ; IMAGES
研究领域[WOS]: Science & Technology - Other Topics ; Instruments & Instrumentation
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内容类型: 期刊论文
URI标识: http://ir.sia.cn/handle/173321/10333
Appears in Collections:机器人学研究室_期刊论文

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