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Your search keyword '"Ueda, Toshitsugu"' showing total 227 results
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227 results on '"Ueda, Toshitsugu"'

14. A piezoelectrically operated optical chopper by quartz micromachining

Author

Toshiyoshi, Hiroshi, Fujita, Hiroyuki, and Ueda, Toshitsugu

Subjects
Miniature electronic equipment -- Design and construction, Electrooptical devices -- Design and construction, Nanotechnology -- Research, Miniaturization (Electronics) -- Research, Engineering and manufacturing industries, Science and technology
Abstract

The fabrication and operation of a piezoelectrically operated monolithic optical chopper (6 mm x 7 mm) are reported. The chopper is made by anisotropic etching of a Z-cut quartz wafer (100 [[micro]meter] thick) in an aqueous solution of N[H.sub.4] H[F.sub.2]. Newly developed piezoelectric operating scheme using meandering electrodes on a flexible quartz suspension (10 [similar to] 50 [[micro]meter] wide, 2 mm long) was found to produce large displacement (deforming ratio 3% by size) at a resonant frequency. Typical operational parameters are the amplitude of oscillation of 55 [[micro]meter] (peak to peak) at a driving voltage of 100 V and the chopping frequency in the 2-5 kHz range depending on the suspension width and length. The resonant frequency is accurately calculated when the cross-sectional profile of the suspension is taken into account. We also successfully demonstrated a chopping operation on a collimated laser beam with the chopper. [123]

Published
1995

37. Development of Portable Quartz Crystal Microbalance for Biosensor Applications.

Author

Jinxing Liang, Jing Zhang, Peng Wang, Changchuan Liu, Shi Qiu, and Ueda, Toshitsugu

Subjects
QUARTZ crystals, BIOSENSORS, OPTICAL materials, RESONATORS, ROCK-forming minerals
Abstract

In this work, we report a novel flow-injection-type portable quartz crystal microbalance (QCM) sensor utilizing a high-frequency (higher than 40 MHz) miniaturized QCM chip. The resonator chip is assembled in a novel three-layer flow cell, in which the top and bottom layers are used to fix the spring-pin leading electrodes and the middle layer is used to house the resonator chip. A two-stage operational transconductance-amplifier-(OPA660)-based oscillator circuit is developed to drive the QCM and measure the frequency shift. A low human IgG concentration of 1 ppm has been measured even using the simple physical adsorption antibody immobilization method, which indicates that the developed portable QCM sensor can be used as a biosensor in liquids. [ABSTRACT FROM AUTHOR]

Published
2016

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