Lab-on-a-Display: Microparticles Manipulation using Liquid Crystal Display

W. Choi, Sewhan Kim, Jin Jang, J. Park
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引用次数: 1

Abstract

We report a new microfluidic system, `lab-on-a-display', that microparticles can be manipulated by dielectrophoretic forces generated from the optoelectronic tweezers (OET) on a liquid crystal display (LCD). In this study, the lab-on-a-display is first realized by a conventional LCD module and an OET device including a ground layer, a liquid layer containing microparticles, and a photoconductive layer. When an AC bias voltage is applied between the photoconductive and the ground layers, the LCD makes an image and transmits it to the OET device. Consequently, the image forms virtual electrodes on the surface of photoconductive layer, which results in the electric field gradient to generate a dielectrophoretic force. The lab-on-a-display is successfully applied to the programmable manipulation of 45 mum polystyrene particles. Our lab-on-a-display platform may be potential for programmable particle manipulation or a bioprocessing unit including a cell separator and a bead-based immunoassay
显示器上的实验室:使用液晶显示器的微粒操作
我们报告了一种新的微流体系统,“实验室-显示器”,微粒子可以通过液晶显示器(LCD)上的光电镊子(OET)产生的介电泳力来操纵。在本研究中,首先通过传统的LCD模块和OET器件实现了lab-on-a-display,该器件包括一个接地层、一个含有微粒的液体层和一个光导层。当在光导层和接地层之间施加交流偏置电压时,LCD产生图像并将其传输到OET设备。因此,图像在光导层表面形成虚电极,导致电场梯度产生介电力。该显示器实验室成功地应用于45 μ m聚苯乙烯颗粒的可编程操作。我们的实验室-显示器平台可能是可编程粒子操作或生物处理单元的潜力,包括细胞分离器和基于珠的免疫测定
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