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This paper introduces a micro-hydrogen generator with self-circulation and self-regulation mechanisms for delivering alkaline sodium borohydride solution without parasitic power consumption. The self-circulation of the sodium borohydride solution was achieved by using directional growth and selective venting of hydrogen bubbles in microchannels, which leads to agitation and addition of fresh solution...
We have developed a fully integrated micro power generator, based on a hydrogen fuel cell. Key to the power generator is an on-board hydrogen production with a passive microfluidic control valve that provides self-regulating operation. Critical integration issues are identified and regimes established for efficient power generation. Preliminary results demonstrate the ability of our device to operate...
We propose a new type of micro/nano fluidic mixer based on non-equilibrium electrokinetics and demonstrate its mixing capacity. We fabricate the device with two-step reactive ion etching, one for a nanochannel and one for a microchannel. Mixing is achieved by strong vortex structures formed near the micro/nano channel interface. We expect the proposed device to be beneficial in the development of...
We have performed trapping and detection of protozoa cells Cryptosporidium parvum and Giardia lamblia with real samples using a filter-based biochip that can substantially minimize clogging. The filter-based biochip is designed with bypass filter concept to relieve pressure buildup, hence improve clogging sensitivity, and sample handling capacity. This biochip may be further integrated for use in...
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