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We report a 8-12-μm-diameter 210-μm-length penetrating silicon probe array assembled by vapor-liquid-solid (VLS) growth, for use in multi-site recordings of neuron spikes in a brain cortex. A 3-μm-diameter silicon probe-tip metalized with platinum (Pt)-black by the electroplating, exhibits low enough probe impedance of 103 kΩ and a more than 90% output/input ratio (1 kHz) for spike recordings. Through...
In this paper, we present out-of-plane micro-scale diameter light guiding silicon dioxide tube arrays for use in optical stimulation of neurons. An optical propagation through the dioxide tube was calculated by using finite-difference time-domain (FDTD) simulation. Based on the calculated result, we designed and fabricated 3-μm-inner diameter 24-μm-height silicon dioxide tube arrays with the wall...
We report in-vitro multisite field potential recordings from fish retina using a vertically integrated silicon (Si) microprobe array. Eight active channels of the enlarged probe-head ldquoKokeshi (Japanese dolls)rdquo type Si probe enabled multisite electrical recordings of retinal responses (electroretinograms (ERGs)) to white light stimuli. The ERG a- and b-waves were obtained at each probe, and...
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