title: Hybrid optofluidic integration.
abstract: Complete integration of microfluidic and optical functions in a single lab-on-chip device is one goal of optofluidics. Here, we demonstrate the hybrid integration of a PDMS-based fluid handling layer with a silicon-based optical detection layer in a single optofluidic system. The optical layer consists of a liquid-core antiresonant reflecting optical waveguide (ARROW) chip that is capable of single particle detection and interfacing with optical fiber. Integrated devices are reconfigurable and able to sustain high pressures despite the small dimensions of the liquid-core waveguide channels. We show the combination of salient sample preparation capabilities-particle mixing, distribution, and filtering-with single particle fluorescence detection. Specifically, we demonstrate fluorescent labelling of λ-DNA, followed by flow-based single-molecule detection on a single device. This points the way towards amplification-free detection of nucleic acids with low-complexity biological sample preparation on a chip.
authors: School of Engineering, University of CA Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA. hschmidt@soe.ucsc.edu.
authors: Joshua W
authors: JW
authors: Parks
authors: Hong
authors: H
authors: Cai
authors: Lynnell
authors: L
authors: Zempoaltecatl
authors: Thomas D
authors: TD
authors: Yuzvinsky
authors: Kaelyn
authors: K
authors: Leake
authors: Aaron R
authors: AR
authors: Hawkins
authors: Holger
authors: H
authors: Schmidt
mesh_terms: D000818:Animals; D004247:DNA / Q000032:analysis; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D008863:Microspheres; D055096:Optical Devices; D055100:Optical Fibers; D012825:Silicon / Q000737:chemistry; D018511:Systems Integration
chemical_list: D004129:Dimethylpolysiloxanes; C013830:baysilon; D004247:DNA; D012825:Silicon
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