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The development and refinement of a microfluidic-based alginate bead generator system for bacterial encapsulation is presented. The resulting microgels have application for the encapsulation of single cells, and can allow for small scale, clonal expansion of thousands of isolated cells in parallel. PDMS based microfluidic chips were fabricated using conventional lithography techniques to produce both...
This paper reports on a novel CMOS-based high-density silicon microprobe array for intracortical recording applications. In contrast to existing systems, CMOS multiplexing units are integrated on the slender, needle-like probe shaft 160 mum in width. In the present implementation an unequaled number of 188 electrodes (diameter 20 mum, pitch 40 mum) are arranged in two columns along the 4-mm-long probe...
We report on a CMOS-based microsensor array, featuring 576 electrodes and 24 channels, for label-free electrochemical detection of DNA hybridization. Each channel comprises a potentiostatic circuit that keeps the electrode at a defined potential and measures the respective electrical current. The readout channels rely on a first-order delta-sigma architecture, where the electrode-electrolyte capacitance...
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