The operating mechanism of Schottky-gate nanosensors

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Title:	The operating mechanism of Schottky-gate nanosensors
Authors:	Lee, Yun-ju;Tung, Hsien-chin;Wu, Wen-wei;Yeh, Ping-hung
Contributors:	淡江大學物理學系
Keywords:	Schottky contact;Zinc oxide;nanowire and sensor
Date:	2011-06-22
Issue Date:	2012-02-09 15:55:38 (UTC+8)
Publisher:	IEEE Electron Devices Society
Abstract:	The highly sensitive nanowire-based Schottky-gate nanosensors for detecting UV, bio-molecules, and gas sensing were demonstrated. The operating mechanism of the Schottky-gate nanosensors is totally distinct from the conventional Ohmic contacted nanosensors. The Schottky-gated device (SGD) has a few merits in comparison to the conventional Ohmic contacted device (OCD). First, it needs no bio-probe to detect molecules; rather, it depends on the absorption of the charged molecules to the junction region. Second, as for the same type of nanowires, such as ZnO, the sensitivity of the SGD is much higher than that of OCD, because a few molecules at the junction region can change the “gate” that effectively tunes the conductance. This Schottky-gate-modulation based sensing principle can be applied to other materials and sensing systems.
Relation:	2011 IEEE 4th International Nanoelectronics Conference(INEC), Tao-Yuan, Taiwan, 1, pp.29-32
DOI:	10.1109/INEC.2011.5991751
Appears in Collections:	[Graduate Institute & Department of Physics] Proceeding

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