UV-Enhanced NO2 Gas Sensing Properties of SnO2-Core/ZnO-Shell Nanowires at Room Temperature

被引：393

作者：

Park, Sunghoon ^{[1
]}

An, Soyeon ^{[1
]}

Mun, Youngho ^{[1
]}

Lee, Chongmu ^{[1
]}

机构：

[1] Inha Univ, Dept Mat Sci & Engn, Inchon 402751, South Korea

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

SnO2; ZnO; core/shell nanowires; gas sensor; UV irradiation; VOLATILE ORGANIC-COMPOUNDS; OXIDE; ZNO; SURFACE; CHEMISTRY; CO;

D O I：

10.1021/am400500a

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

SnO2-core/ZnO-shell nanowires were synthesized using a two-step process: the synthesis of SnO2 nanowires by the thermal evaporation of Sn powders followed by the atomic layer deposition of ZnO. The room temperature NO2 gas sensing properties of the nanowires under ultraviolet (UV) illumination were examined. The cores and shells of the nanowires were primitive tetragonal-structured single crystal SnO2 and wurtzite-structured single crystal ZnO, respectively. The responses of multiple networked SnO2 nanowire sensors were increased 2-3-fold at NO2 concentrations ranging from 1 to 5 ppm by encapsulating the nanowires with ZnO. The SnO2-core/ZnO-shell nanowire sensors showed a remarkably enhanced response under UV illumination. The sensing mechanism of the core/shell nanowires under UV illumination is also discussed.

引用

页码：4285 / 4292

页数：8

共 39 条

[1] Design and performance of a simple, room-temperature Ga2O3 nanowire gas sensor [J].

Arnold, S. P. ;

Prokes, S. M. ;

Perkins, F. K. ;

Zaghloul, M. E. .

APPLIED PHYSICS LETTERS, 2009, 95 (10)

[2] Conduction model of metal oxide gas sensors [J].

Barsan, N ;

Weimar, U .

JOURNAL OF ELECTROCERAMICS, 2001, 7 (03) :143-167

[3] Size-dependent photoconductivity in MBE-grown GaN-nanowires [J].

Calarco, R ;

Marso, M ;

Richter, T ;

Aykanat, AI ;

Meijers, R ;

Hart, AV ;

Stoica, T ;

Luth, H .

NANO LETTERS, 2005, 5 (05) :981-984

[4] UV sensor based on TiO2 nanorod arrays on FTO thin film [J].

Cao, Chunlan ;

Hu, Chenguo ;

Wang, Xue ;

Wang, Shuxia ;

Tian, Yongshu ;

Zhang, Hulin .

SENSORS AND ACTUATORS B-CHEMICAL, 2011, 156 (01) :114-119

[5] Novel fabrication of an SnO2 nanowire gas sensor with high sensitivity [J].

Choi, Young-Jin ;

Hwang, In-Sung ;

Park, Jae-Gwan ;

Choi, Kyoung Jin ;

Park, Jae-Hwan ;

Lee, Jong-Heun .

NANOTECHNOLOGY, 2008, 19 (09)

[6] UV light activation of tin oxide thin films for NO2 sensing at low temperatures [J].

Comini, E ;

Faglia, G ;

Sberveglieri, G .

SENSORS AND ACTUATORS B-CHEMICAL, 2001, 78 (1-3) :73-77

[7] Light enhanced gas sensing properties of indium oxide and tin dioxide sensors [J].

Comini, E ;

Cristalli, A ;

Faglia, G ;

Sberveglieri, G .

SENSORS AND ACTUATORS B-CHEMICAL, 2000, 65 (1-3) :260-263

[8] Nanopatterned polycrystalline ZnO for room temperature gas sensing [J].

Fan, Shan-Wei ;

Srivastava, Arvind K. ;

Dravid, Vinayak P. .

SENSORS AND ACTUATORS B-CHEMICAL, 2010, 144 (01) :159-163

[9] UV-activated room-temperature gas sensing mechanism of polycrystalline ZnO [J].

Fan, Shan-Wei ;

Srivastava, Arvind K. ;

Dravid, Vinayak P. .

APPLIED PHYSICS LETTERS, 2009, 95 (14)

[10] Synthesis, Raman scattering and defects of β-Ga2O3 nanorods [J].

Gao, YH ;

Bando, Y ;

Sato, T ;

Zhang, YF ;

Gao, XQ .

APPLIED PHYSICS LETTERS, 2002, 81 (12) :2267-2269

← 1 2 3 4 →