Title :
Lab-on-a-Display: Microparticles Manipulation using Liquid Crystal Display
Author :
Choi, Wonjae ; Kim, Sewhan ; Jang, Jin ; Park, Je-Kyun
Author_Institution :
Dept. of BioSyst., Korea Adv. Inst. of Sci. & Technol., Daejeon
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
Keywords :
bioMEMS; biological techniques; cellular biophysics; electrophoresis; lab-on-a-chip; liquid crystal displays; microfluidics; optoelectronic devices; particle size; radiation pressure; 45 micron; LCD; bead-based immunoassay; bioprocessing unit; cell separator; dielectrophoretic forces; electric field gradient; ground layer; lab-on-a-display; liquid crystal display; liquid layer; microfluidic system; microparticles manipulation; optoelectronic tweezers; photoconductive layer; polystyrene particles; programmable particle manipulation; virtual electrodes; Dielectrophoresis; Electric fields; Electrodes; Immune system; Liquid crystal displays; Microfluidics; Particle separators; Photoconducting devices; Photoconductivity; Voltage; dielectrophoresis; lab-on-a-display; liquid crystal display (LCD); optoelectronic tweezers; virtual electrode;
Conference_Titel :
Microtechnologies in Medicine and Biology, 2006 International Conference on
Conference_Location :
Okinawa
Print_ISBN :
1-4244-0337-5
Electronic_ISBN :
1-4244-0338-3
DOI :
10.1109/MMB.2006.251484
