Low Hg(II) ion concentration electrical detection with AlGaN/GaN high electron mobility transistors

被引：57

作者：

Chen, K. H. ^{[1
]}

Wang, H. W. ^{[1
]}

Kang, B. S. ^{[1
]}

Chang, C. Y. ^{[2
]}

Wang, Y. L. ^{[2
]}

Lele, T. P. ^{[1
]}

Ren, F. ^{[1
]}

Pearton, S. J. ^{[2
]}

Dabiran, A. ^{[3
]}

Osinsky, A. ^{[3
]}

Chow, P. R. ^{[3
]}

机构：

[1] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA

[2] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[3] SVT Associates, Eden Prairie, MN 55344 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2008年 / 134卷 / 02期

关键词：

Mercury ion sensor; Hg2+; HEMT; Thioglycolic acid;

D O I：

10.1016/j.snb.2008.05.012

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Thioglycolic acid functionalized Au-gated AlGaN/GaN high electron mobility transistors (HEMTs) were used to detect mercury(II) ions. The drain current of the HEMT sensors monotonically increased with the mercury(II) ion concentration from 1.5 x 10(-8) to 4 x 10(-8) M. The drain current reached equilibrium around 15-20 s after the concentrated Hg ion solution added to the gate area of the HEMT sensors. The effectiveness of the thioglycolic acid functionalization was evaluated with a surface contact angle study. The results suggest that portable, fast response, and wireless-based heavy metal ion detectors can be realized with AlGaN/GaN HEMT-based sensors. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：386 / 389

页数：4

共 26 条

[1]

Anderson JL, 1996, ANAL CHEM, V68, pR379, DOI 10.1021/a1960015y

[2] Optical sensor for the visual detection of mercury using mesoporous silica anchoring porphyrin moiety [J].

Balaji, T ;

Sasidharan, M ;

Matsunaga, H .

ANALYST, 2005, 130 (08) :1162-1167

[3]

Burlingame AL, 1996, ANAL CHEM, V68, pR599, DOI 10.1021/a1960021u

[4] Highly selective chromogenic and redox or fluorescent sensors of Hg2+ in aqueous environment based on 1,4-disubstituted azines [J].

Caballero, A ;

Martínez, R ;

Lloveras, V ;

Ratera, I ;

Vidal-Gancedo, J ;

Wurst, K ;

Tárraga, A ;

Molina, P ;

Veciana, J .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (45) :15666-15667

[5] Preparation, characterization and evaluation of water-soluble L-cysteine-capped-CdS nanoparticles as fluorescence probe for detection of Hg(II) in aqueous solution [J].

Cai, ZX ;

Yang, H ;

Zhang, Y ;

Yan, XP .

ANALYTICA CHIMICA ACTA, 2006, 559 (02) :234-239

[6] A novel fluorescent array for mercury (II) ion in aqueous solution with functionalized cadmium selenide nanoclusters [J].

Chen, Jinlong ;

Gao, YingChun ;

Xu, ZhiBing ;

Wu, GenHua ;

Chen, YouCun ;

Zhu, ChangQing .

ANALYTICA CHIMICA ACTA, 2006, 577 (01) :77-84

[7] Reversible colorimetric probes for mercury sensing [J].

Coronado, E ;

Galán-Mascaros, JR ;

Martí-Gastaldo, C ;

Palomares, E ;

Durrant, JR ;

Vilar, R ;

Gratzel, M ;

Nazeeruddin, MK .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (35) :12351-12356

[8] Selective gold-nanoparticle-based "turn-on" fluorescent sensors for detection of mercury(II) in aqueous solution [J].

Huang, Chih-Ching ;

Chang, Huan-Tsung .

ANALYTICAL CHEMISTRY, 2006, 78 (24) :8332-8338

[9]

*ISI, 1981, IS2490 ISI

[10]

Jackson KW, 1996, ANAL CHEM, V68, pR231, DOI 10.1021/a1960012l

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