Browsing by Author "Lo, Yen-Ren"

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Gas Sensing Ability on Polycrystalline-Silicon Nanowire
(2018-01-01)
Lo, Yen-Ren
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Chen, Huang-Ming Philip
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Yang, Yuh-Shyong
;
Lu, Ming-Pei
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生物科技學系
Trace of protic gases can alter the conductivity of the polycrystalline silicon nanowire (poly-Si NW) field effect transistor (FET). The aprotic gases have no effect on the electrical parameters. The proposed mechanism is due to the surface grain boundary of poly-Si NW. The direct evidence is obtained from the comparison between single-and poly-Si NW. The electrical parameters are varied according to the relative humidity levels. Nevertheless, the water molecules can be removed by vacuum indicating that it is physical absorption on the surface. As a result, the poly-Si NW FET has potential to be a reusable device for protic gas sensor. (C) The Author(s) 2018. Published by ECS.
Novel poly-silicon nanowire field effect transistor for biosensing application
(2009-01-01)
Hsiao, Cheng-Yun
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Lin, Chih-Heng
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Hung, Cheng-Hsiung
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Su, Chun-Jung
;
Lo, Yen-Ren
A simple and low-cost method to fabricate poly-silicon nanowire field effect transistor (poly-Si NW FET) for biosensing application was demonstrated. The poly-silicon nanowire (poly-Si NW) channel was fabricated by employing the poly-silicon (poly-Si) sidewall spacer technique, which approach was comparable with current commercial semiconductor process and forsaken expensive E-beam lithography tools. The electronic properties of the poly-Si NW FET in aqueous solution were found to be similar to those of single-crystal silicon nanowire held effect transistors reported in the literature. A model biotin and avidin/streptavidin sensing system was used to demonstrate the biosensing capacity of poly-Si NW FET. The changes Of ID-VG curves were consistent with an n-type FET affected by a nearby negatively (streptavidin) and positively (avidin) charged molecules, respectively. Specific electric changes were observed for streptavidin and avidin sensing when nanowire surface of poly-Si NW FET was modified with biotin and streptavidin at sub pM to nM range could be distinguished. With its excellent electric properties and the potential for mass commercial production, poly-Si NW FET can be a very useful transducer for a variety of biosensing applications. (C) 2008 Elsevier B.V. All rights reserved.
Ultrasensitive detection of dopamine using a polysilicon nanowire field-effect transistor
(2008)
Lin, Chih-Heng
;
Hsiao, Cheng-Yun
;
Hung, Cheng-Hsiung
;
Lo, Yen-Ren
;
Lee, Cheng-Che
An unprecedented high sensitive sensing of neurotransmitter dopamine at fM level was demonstrated using a poly-crystalline silicon nanowire field-effect transistor (poly-SiNW FET) fabricated by employing a simple and low-cost poly-Si sidewall spacer technique, which was compatible with current commercial semiconductor processes for large-scale standard manufacture.