Opto-biochips for Microcytometry - Goel, Sanket
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Microscale fluorescence activated cell-sorting (micro-FACS) is a technology to identify and separate cells. Different elements of the micro-FACS, fabrication of opto-biochips, particle detection and velocity measurement, and flow switching, are studied in the present work. Biochips were fabricated by casting polydimethylsiloxane (PDMS) on the masters fabricated by direct laser-writing, and standard lithography and dry etching. In a different approach, biochips with integrated waveguides and microchannels were fabricated photolithographically on glass substrates using a negative photoresist,…mehr

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Produktbeschreibung
Microscale fluorescence activated cell-sorting (micro-FACS) is a technology to identify and separate cells. Different elements of the micro-FACS, fabrication of opto-biochips, particle detection and velocity measurement, and flow switching, are studied in the present work. Biochips were fabricated by casting polydimethylsiloxane (PDMS) on the masters fabricated by direct laser-writing, and standard lithography and dry etching. In a different approach, biochips with integrated waveguides and microchannels were fabricated photolithographically on glass substrates using a negative photoresist, SU-8. In these opto-biochips, two excitation waveguides carrying two different wavelengths intersect the microchannel at two points separated and one large output waveguide carry fluorescence signals to a single filtered detector. The velocities of the microparticles were determined by the captured fluorescence from the double peak. Simulations based on beam propagation method were used to predict the performance of the SU-8 waveguides and the intensity at the two intersections has been compared with the experimental results.
Autorenporträt
Sanket Goel is an alumni of Delhi University (BSc (H), 1998), IIT Delhi (MSc, 2000) and University of Alberta (PhD, 2006). Sanket worked at two Government of India Research Labs and Stanford University before moving to Singapore, where he is living with his family and working as a Scientist at the Agency for Science, Technology and Research.