One-dimensional CuO-SnO2 p-n heterojunctions for enhanced detection of H2S

被引：64

作者：

Giebelhaus, Irina ^{[1
]}

Varechkina, Elena ^{[2
]}

Fischer, Thomas ^{[1
]}

Rumyantseva, Marina ^{[2
]}

Ivanov, Vladimir ^{[3
]}

Gaskov, Alexander ^{[2
]}

Morante, Joan Ramon ^{[4
]}

Arbiol, Jordi ^{[5
,6
]}

Tyrra, Wieland ^{[1
]}

Mathur, Sanjay ^{[1
]}

机构：

[1] Univ Cologne, Dept Chem, D-50939 Cologne, Germany

[2] Moscow MV Lomonosov State Univ, Lab Chem & Phys Semicond & Sensor Mat, Dept Chem, Moscow 119991, Russia

[3] Kurnakov Inst Gen & Inorgan Chem RAS, Moscow 119991, Russia

[4] Catalonia Inst Energy Res IREC, Dept Adv Mat Energy Applicat, E-08930 Barcelona, Spain

[5] ICMAB CSIC, ICREA, E-08193 Bellaterra, Cat, Spain

[6] ICMAB CSIC, Inst Ciencia Mat Barcelona, E-08193 Bellaterra, Cat, Spain

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2013年 / 1卷 / 37期

关键词：

CHEMICAL-VAPOR-DEPOSITION; GAS SENSORS; CRYSTAL-STRUCTURES; ROOM-TEMPERATURE; ELECTRONIC NOSE; COPPER; SNO2; FILMS; COMPLEXES; NANOWIRE;

D O I：

10.1039/c3ta11867c

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：

Highly crystalline SnO2 nanowires were synthesized and functionalized with copper particles in a CVD using Sn(OBut)(4) and [Cu-II((C5H4N)(CHCOCF3))(2)](2) (1) as precursors respectively. Controlled oxidation of Cu to CuO led to the formation of CuO@SnO2 p-n heterojunctions, which were found to be highly sensitive and selective towards the detection of H2S gas. The change in the conductance upon exposure to H2S gas was attributed to the formation of CuS resulting in the shrinkage of the space charge region along the SnO2 nanowire and a concomitant increase of the conductivity channel in an individual nanowire.

引用

页码：11261 / 11268

页数：8

共 49 条

[1] COMPLETION AND REFINEMENT OF CRYSTAL-STRUCTURES WITH SIR92 [J].