Details

Autor(en) / Beteiligte

• Hwang, In-Sung
• Kim, Sun-Jung
• Choi, Joong-Ki
• Choi, Jaewan
• Ji, Hyunjin
• Kim, Gyu-Tae
• Cao, Guozhong
• Lee, Jong-Heun

Titel

Synthesis and gas sensing characteristics of highly crystalline ZnO–SnO2 core–shell nanowires

Ist Teil von

• Sensors and actuators. B, Chemical, 2010-07, Vol.148 (2), p.595-600

Erscheinungsjahr

2010

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The ZnO-SnO2 core-shell nanowires (NWs) were synthesized by a continuous two-step vapor growth method at different synthesis temperatures. A crystalline 15-20nm-thick, SnO2 shell layer was pseudo-epitaxially coated on ZnO NWs with a diameter of 50-80nm. The gas response of the ZnO-SnO2 core-shell NW sensor to 10ppm NO2 reached 33 times enhancement compared to that of the ZnO NWs at 200 degree C In addition, the ZnO-SnO2 core-shell NW sensors showed selective detection to NO2 at 200-300 degree C and to C2H5OH at 400 degree C. The enhanced gas responses to NO2 and C2H5OH are discussed in relation to the thin SnO2 shell layer and core-shell configuration of the NWs.