Investigation of Size Dependence on Sensitivity for Nanowire FET Biosensors

被引：27

作者：

Ahn, Jae-Hyuk ^{[1
]}

Choi, Sung-Jin ^{[1
]}

Han, Jin-Woo ^{[2
]}

Park, Tae Jung ^{[3
]}

Lee, Sang Yup ^{[3
,4
,5
,6
,7
]}

Choi, Yang-Kyu ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea

[2] NASA, Ames Res Ctr, Ctr Nanotechnol, Moffett Field, CA 94035 USA

[3] Korea Adv Inst Sci & Technol, BioProc Engn Res Ctr, Ctr Syst & Synthet Biotechnol, Inst BioCentury, Taejon 305701, South Korea

[4] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South Korea

[5] Korea Adv Inst Sci & Technol, Bioinformat Res Ctr, Taejon 305701, South Korea

[6] Korea Adv Inst Sci & Technol, Dept Biol Sci, Taejon 305701, South Korea

[7] Korea Adv Inst Sci & Technol, Dept Bio & Brain Engn, Taejon 305701, South Korea

来源：

IEEE TRANSACTIONS ON NANOTECHNOLOGY | 2011年 / 10卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

Biosensor; capacitive model; double gate (DG); field-effect transistor (FET); nanowire (NW); LABEL-FREE DETECTION; ELECTRICAL DETECTION; SILICON NANOWIRES; CARBON NANOTUBES; DNA HYBRIDIZATION; NANOSENSORS; DEVICES; SENSORS; MOSFETS; SURFACE;

D O I：

10.1109/TNANO.2011.2157519

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Label-free electrical detection of biomolecules is demonstrated with a double-gate (DG) nanowire (NW) field-effect transistor (FET). Experimental results confirm that detection sensitivity is favorably improved by the increment of NW size in the DG-NWFET, whereas it is enhanced by the decrement of NW size in a conventional single-gate (SG) NWFET. Sensitivity improvement by the augmentation of the NW size in the DG-FET paves the way to overcome technical challenges we face in achieving ultimate miniaturization of the NW size in the SG-FET. This result is comprehensively understood by simple capacitive modeling. The proposed model explains the observed experimental data and provides a design guideline for highly sensitive NW biosensors.

引用

页码：1405 / 1411

页数：7

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