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We developed a MEMS Fabry-Perot interferometer with high wavelength selectivity by using Au half-mirrors for a highly sensitive label-free biosensor. The proposed optical interferometer can perform signal conversion from membrane deformation caused by biomolecule adsorption to electrical readout signal in an exponential manner by using the gradient of the transmitted interference spectrum. By integrating...
32 x 32 pH image sensors were successfully fabricated by using the CCD/CMOS image sensor technique, and real time imaging of a chemical reaction and pH distribution was carried out for the first time. The pH variations by a chemical reaction are observed by 200 ms step (i.e. 5 flames per sec). The pH image sensor was able to take a pH image of mouse stomach successfully. It means that the novel image...
We successfully fabricated a super high sensitivity charge transfer type pH sensor. The proposed pH sensor is possible to amplify the sensing signals without an external amplifier by accumulation cycle. The pH sensitivity was obtained 5048 mV/pH, which is approximately 100 times higher than the Ion Sensitive Field Effect Transistor (ISFET), which is the most familiar pH sensor using semiconductor...
The charge transfer type blood glucose sensor (CTTGS) has been proposed. The CTTGS is an accumulation method H+ ion (gluconic acid) perception system. As compared to cyclic-voltammetry and ISFET, the performance was found to be excellent with span and range of 1445 mV and 200 mmol/L respectively. The sensitivity obtained for blood glucose level of the person was 29.06 mV/mmol with a non-linear error...
We present about a pH sensor, which is capable of measuring high sensitivity using charge transfer technique. The sensitivity of pH was obtained 1130 mV/pH by charge accumulation operation. The proposed pH sensor using charge transfer technique is possible to increase a sensing signal without an extra amplifier. It is expected that charge transfer type pH sensor increases sensitivity and decreases...
The microcolumnar structure of Co-Cr film has been studied using chemical etching. Only the columns are dissolved, leaving the column boundaries with a micro-honeycomb structure. From compositional analysis of the etchant after etching, Cr segregated column boundaries have been confirmed to exist even in Co-Cr films sputtered at high sputtering rates. Co-Cr films with higher Hc show sharper and narrower...
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