Fabrication of tin dioxide nanowires with ultrahigh gas sensitivity by atomic layer deposition of platinum

被引：54

作者：

Lin, Yu-Hung ^{[1
]}

Hsueh, Yang-Chih ^{[1
]}

Lee, Po-Sheng ^{[1
]}

Wang, Chih-Chieh ^{[1
]}

Wu, Jyh Ming ^{[2
]}

Perng, Tsong-Pyng ^{[1
]}

Shih, Han C. ^{[1
,3
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

[2] Feng Chia Univ, Dept Mat Sci & Engn, Taichung 407, Taiwan

[3] Chinese Culture Univ, Inst Mat Sci & Nanotechnol, Taipei 111, Taiwan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 28期

关键词：

SENSING PROPERTIES; SNO2; NANOWIRES; SENSOR; OXIDE; SURFACE; TIO2; NANOPARTICLES; CATALYSTS; FILMS;

D O I：

10.1039/c1jm10785b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Gas-sensing properties of SnO2 nanowires were investigated before and after their surface functionalization by the atomic layer deposition (ALD) of Pt nanoparticles. The morphology, size, and concentration of Pt particles on SnO2 nanowires can be controlled by varying the number of ALD reaction cycles, and therefore, the gas-sensing properties of the nanowires can be altered via the Pt catalyst effect and the modification of Schottky barrier junctions on the nanowire surface in the vicinity of Pt nanoparticles. The Pt-decorated SnO2 nanowires obtained after 200 ALD reaction cycles exhibited an ultrahigh gas sensitivity (S = I-g/I-a) of similar to 8400 to 500 ppm ethanol vapor at 200 degrees C. This provides an efficient route for strongly enhancing the gas sensitivity of semiconducting nanostructures and fabricating gas sensors that are highly sensitive and responsive.

引用

页码：10552 / 10558

页数：7

共 45 条

[1] Atomic layer deposition of platinum thin films [J].

Aaltonen, T ;

Ritala, M ;

Sajavaara, T ;

Keinonen, J ;

Leskelä, M .

CHEMISTRY OF MATERIALS, 2003, 15 (09) :1924-1928

[2] Scanning tunnelling microscopy studies of the reactivity of the TiO2(110) surface:: Re-oxidation and the thermal treatment of metal nanoparticles [J].

Bennett, RA ;

Stone, P ;

Bowker, M .

FARADAY DISCUSSIONS, 1999, 114 :267-277

[3]

CHEN Y, 2008, NANOTECHNOLOGY

[4] Synthesis and enhanced ethanol sensing characteristics of α-Fe2O3/SnO2 core-shell nanorods [J].

Chen, Yu-Jin ;

Zhu, Chun-Ling ;

Wang, Li-Jiao ;

Gao, Peng ;

Cao, Mao-Sheng ;

Shi, Xiao-Ling .

NANOTECHNOLOGY, 2009, 20 (04)

[5] Nanoscale Structure and Morphology of Atomic Layer Deposition Platinum on SrTiO3 (001) [J].

Christensen, Steven T. ;

Elam, Jeffrey W. ;

Lee, Byeongdu ;

Feng, Zhenxing ;

Bedzyk, Michael J. ;

Hersam, Mark C. .

CHEMISTRY OF MATERIALS, 2009, 21 (03) :516-521

[6] Nanowire nanosensors for highly sensitive and selective detection of biological and chemical species [J].

Cui, Y ;

Wei, QQ ;

Park, HK ;

Lieber, CM .

SCIENCE, 2001, 293 (5533) :1289-1292

[7] XPS and FTIR surface characterization of TiO2 particles used in polymer encapsulation [J].

Erdem, B ;

Hunsicker, RA ;

Simmons, GW ;

Sudol, ED ;

Dimonie, VL ;

El-Aasser, MS .

LANGMUIR, 2001, 17 (09) :2664-2669

[8] SEMICONDUCTING GAS SENSORS [J].

HAGEN, W ;

LAMBRICH, RE ;

LAGOIS, J .

FESTKORPERPROBLEME-ADVANCES IN SOLID STATE PHYICS, 1983, 23 :259-274

[9] Charge transfer in metal catalysts supported on doped TiO2: A theoretical approach based on metal-semiconductor contact theory [J].

Ioannides, T ;

Verykios, XE .

JOURNAL OF CATALYSIS, 1996, 161 (02) :560-569

[10] On the role of catalytic additives in gas-sensitivity of SnO2-Mo based thin film sensors [J].

Ivanovskaya, M ;

Bogdanov, P ;

Faglia, G ;

Nelli, P ;

Sberveglieri, G ;

Taroni, A .

SENSORS AND ACTUATORS B-CHEMICAL, 2001, 77 (1-2) :268-274

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