Picogram Mass Sensor Using Piezoresistive Cantilever for Biosensor
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概要
- 論文の詳細を見る
A harmonic vibrator using a piezoresistive cantilever has been developed for a picogram mass biosensor. We constructed a prototype vibrator sensor using the cantilever, Wheatstone bridge circuits, positive feedback controller, a piezoactuator and a phase-locked loop (PLL) demodulator. As experimental results, a mass sensitivity of 2.2 pg/Hz was obtained from water molecular adsorption on the cantilever. We confirmed that the mechanism of water molecular growth has 2 modes, island growth and layer growth. The critical point of the mechanism change was a humidity of about 42%. At the critical point, the adsorbed mass corresponds to the water layer of about 13 monolayers.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-07-15
著者
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Sone Hayato
Department Of Applied Physics The Science University Of Tokyo
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Hosaka Sumio
Department Of Electronic Engineering Gunma University
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Okano Haruki
Tokyo Sokki Kenkyujo Co. Ltd.
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Okano Haruki
Tokyo Sokki Kenkyujo Co., Ltd., 4-247 Aioi-cho, Kiryu, Gunma 376-0011, Japan
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