Development of Micro Optical Diffusion Sensor using Laser Induced Dielectrophoretic Manipulation

Itani, Koichi; Ebisui, Akira; Taguchi, Yoshihiro; Nagasaka, Yuji

doi:10.2963/jjtp.23.197

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Furthermore, they are difficult to miniaturize. From above aspects, we have developed a novel micro optical diffusion sensor (MODS) [1] based on laser-induced dielectrophoresis (LIDEP) [2], enabling minutely small sample and high-speed measurement without sample pretreatment. In this paper, in order to observe the mass diffusion generated by LIDEP, we propose a novel optical signal detection technique using diffracted light and a novel scanning mirror, which can be easily integrated into MODS.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Micro Optical Diffusion Sensor for Dynamic Sensing of Conformation Change

Kadota

Matoba

Ishii

et al. 2013

Extended Abstracts of the 2013 International Conference on Solid State Devices and Materials

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Micro Optical Diffusion Sensor for Dynamic Sensing of Conformation Change

Kadota

Matoba

Ishii

et al. 2013

Extended Abstracts of the 2013 International Conference on Solid State Devices and Materials

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Study on Micro Optical Diffusion Sensor Using Laser-Induced Dielectrophoresis (Preliminary Experiment of Optical Detection System for Integrated Micro Optical Device)

Itani¹,

Taguchi²,

Nagasaka³

2011

Trans.JSME, Ser.B

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We have developed a Micro Optical Diffusion Sensor (MODS) using laser-induced dielectrophoresis, enabling small sample volume and high-speed measurement without any additives or pretreatments. All optical components are integrated in a small chip by using MEMS fabrication technique. A micro channel of MODS consists of a pair of transparent electrodes and a photoconductive layer. AC voltage is applied between transparent electrodes sealing the liquid sample, and two excitation lasers which generate the light intensity distribution are intersected on the photoconductive layer. The electric conductivity distribution of the photoconductive layer is generated by the photoconductive effect. A non-uniform electric field is formed followed by generating the dielectrophoresis, and then the sinusoidal concentration distribution is induced in a micro channel. After cutting the AC voltage, the mass diffusion occurs, and the diffusion coefficient can be obtained by observing the diffusion process of one-dimensional concentration distribution. In this paper, we have utilized the transient grating method as a detecting method of the mass diffusion because of its simplicity of integration. When probing laser enters the concentration distribution, the diffracted light is generated. The decay of the concentration distribution can be detected by the intensity change of the diffracted light, and the diffusion coefficient can be obtained from the time constant of decay. In order to verify the proposed method, preliminary experiments were conducted, and the applicability of MODS was successfully confirmed.

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Development of Micro Optical Diffusion Sensor using Laser Induced Dielectrophoretic Manipulation

Cited by 2 publications

References 6 publications

Experimental Study on Micro Optical Diffusion Sensor for Dynamic Sensing of Conformation Change

Experimental Study on Micro Optical Diffusion Sensor for Dynamic Sensing of Conformation Change

Study on Micro Optical Diffusion Sensor Using Laser-Induced Dielectrophoresis (Preliminary Experiment of Optical Detection System for Integrated Micro Optical Device)

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