Fast electrical detection of Hg(II) ions with AlGaN/GaN high electron mobility transistors

被引：65
作者：
Wang, Hung-Ta
Kang, B. S.
Chancellor, T. F., Jr.
Lele, T. P.
Tseng, Y.
Ren, F. [1 ]
Pearton, S. J.
Johnson, W. J.
Rajagopal, P.
Roberts, J. C.
Piner, E. L.
Linthicum, K. J.
机构：
[1] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA
[2] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA
[3] Nitronex Corp, Durham, NC USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 04期
关键词：
D O I：
10.1063/1.2764554
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Bare Au gated and thioglycolic acid functionalized Au-gated AlGaN/GaN high electron mobility transistors (HEMTs) were used to detect mercury (II) ions. Fast detection of less than 5 s was achieved for thioglycolic acid functionalized sensors. This is the shortest response time ever reported for mercury detection. Thioglycolic acid functionalized Au-gated AlGaN/GaN HEMT based sensors showed 2.5 times larger response than bare Au-gated based sensors. The sensors were able to detect mercury (II) ion concentration as low as 10(-7)M. The sensors showed an excellent sensing selectivity of more than 100 for detecting mercury ions over sodium or magnesium ions. The dimensions of the active area of the sensor and the entire sensor chip are 50 x 50 mu m(2) and 1 x 5 mm(2), respectively. Therefore, portable, fast response, and wireless based heavy metal ion detectors can be realized with AlGaN/GaN HEMT based sensors. (C) 2007 American Institute of Physics.
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相关论文
共 20 条
[1]  
ANDERSON JL, 1996, ANAL CHEM, V68, P379
[2]  
BURLINGAME AL, 1996, ANAL CHEM, V68, P599
[3]   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
[4]   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
[5]   Dose-dependent inorganic mercury absorption by isolated perfused intestine of rainbow trout, Oncorhynchus mykiss, involves both amiloride-sensitive and energy-dependent pathways [J].
Hoyle, I ;
Handy, RD .
AQUATIC TOXICOLOGY, 2005, 72 (1-2) :147-159
[6]   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
[7]  
JACKSON KW, 1996, ANAL CHEM, V68, P231
[8]   Electrical detection of deoxyribonucleic acid hybridization with AlGaN/GaN high electron mobility transistors [J].
Kang, B. S. ;
Pearton, S. J. ;
Chen, J. J. ;
Ren, F. ;
Johnson, J. W. ;
Therrien, R. J. ;
Rajagopal, P. ;
Roberts, J. C. ;
Piner, E. L. ;
Linthicum, K. J. .
APPLIED PHYSICS LETTERS, 2006, 89 (12)
[9]  
Kang BS, 2005, APPL PHYS LETT, V86, DOI [10.1063/1.1952568, 10.1063/1.1920433]
[10]   Electrical detection of immobilized proteins with ungated AlGaN/GaN high-electron-mobility transistors [J].
Kang, BS ;
Ren, F ;
Wang, L ;
Lofton, C ;
Tan, WHW ;
Pearton, SJ ;
Dabiran, A ;
Osinsky, A ;
Chow, PP .
APPLIED PHYSICS LETTERS, 2005, 87 (02)
12