Controlled microfluidic interfaces for microsensors

H. Jiang

doi:10.1117/12.807983

19 February 2009 Controlled microfluidic interfaces for microsensors

H. Jiang

Proceedings Volume 7167, Frontiers in Pathogen Detection: From Nanosensors to Systems; 71670K (2009) https://doi.org/10.1117/12.807983
Event: SPIE BiOS, 2009, San Jose, California, United States

Abstract

Lab on a chip has found many applications in biological and chemical analysis, including pathogen detections. Because these labs on chips involve handling of fluids at the microscale, surface tension profoundly affects the behavior and performance of these systems. Through careful engineering, controlled liquid-liquid or liquid-gas interfaces at the microscale can be formed and used in many interesting applications. In this talk, I will present our work on applying such interfaces to microsensing. These interfaces are created at hydrophobic-hydrophilic boundaries formed within microfluidic channels and pinned by surface tension. We have designed and fabricated a few microsensing techniques including chemical and biological sensing using dissolvable micromembranes in microchannels, chemical and biological sensing at liquid crystals interfacing either air or aqueous solutions, and collection of gaseous samples and aerosols through air-liquid microfludic interfaces. I will next introduce on-chip microlenses and microlens arrays for optical detection, including smart and adaptive liquid microlenses actuated by stimuli-responsive hydrogels, and liquid microlenses in situ formed within microfluidic channels via pneumatic control of droplets.

Citation Download Citation

H. Jiang "Controlled microfluidic interfaces for microsensors", Proc. SPIE 7167, Frontiers in Pathogen Detection: From Nanosensors to Systems, 71670K (19 February 2009); https://doi.org/10.1117/12.807983

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