Abstract
The pure and 0.3 wt% Pt-doped SnO2 hollow nanospheres were prepared by the oxidation of pure and Pt-doped Sn nanoscrystals embedded in carbon matrix and their gas sensing characteristics were investigated. The formation of hollow morphology was attributed to the nanoscale Kirkendall effect due to rapid outward diffusion of Sn ions and relatively slow inward diffusion of oxygen. Pure SnO2 hollow nanospheres showed a high response (resistance ratio) of 93.3 when exposed to 5 ppm ethanol. The response to 5 ppm ethanol was significantly increased to 1399.9 with doping 0.3 wt% Pt. In addition, selectivity to ethanol was also enhanced by Pt doping. Ultrasensitive and selective detection of ethanol in pure and Pt-doped SnO2 nanospheres is explained by the effective electron depletion in hollow structures and catalytic promotion of gas sensing reaction.
| Original language | English |
|---|---|
| Pages (from-to) | 353-360 |
| Number of pages | 8 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 234 |
| DOIs | |
| Publication status | Published - 2016 Oct 29 |
Fingerprint
Keywords
- Gas sensor
- Hollow spheres
- Kirkendall diffusion
- Sensitivity
- SnO
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry
- Electrical and Electronic Engineering
Cite this
Extremely sensitive ethanol sensor using Pt-doped SnO2 hollow nanospheres prepared by Kirkendall diffusion. / Kim, Bo Young; Cho, Jung Sang; Yoon, Ji Wook; Na, Chan Woong; Lee, Chul Soon; Ahn, Jee Hyun; Kang, Yun Chan; Lee, Jong Heun.
In: Sensors and Actuators, B: Chemical, Vol. 234, 29.10.2016, p. 353-360.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Extremely sensitive ethanol sensor using Pt-doped SnO2 hollow nanospheres prepared by Kirkendall diffusion
AU - Kim, Bo Young
AU - Cho, Jung Sang
AU - Yoon, Ji Wook
AU - Na, Chan Woong
AU - Lee, Chul Soon
AU - Ahn, Jee Hyun
AU - Kang, Yun Chan
AU - Lee, Jong Heun
PY - 2016/10/29
Y1 - 2016/10/29
N2 - The pure and 0.3 wt% Pt-doped SnO2 hollow nanospheres were prepared by the oxidation of pure and Pt-doped Sn nanoscrystals embedded in carbon matrix and their gas sensing characteristics were investigated. The formation of hollow morphology was attributed to the nanoscale Kirkendall effect due to rapid outward diffusion of Sn ions and relatively slow inward diffusion of oxygen. Pure SnO2 hollow nanospheres showed a high response (resistance ratio) of 93.3 when exposed to 5 ppm ethanol. The response to 5 ppm ethanol was significantly increased to 1399.9 with doping 0.3 wt% Pt. In addition, selectivity to ethanol was also enhanced by Pt doping. Ultrasensitive and selective detection of ethanol in pure and Pt-doped SnO2 nanospheres is explained by the effective electron depletion in hollow structures and catalytic promotion of gas sensing reaction.
AB - The pure and 0.3 wt% Pt-doped SnO2 hollow nanospheres were prepared by the oxidation of pure and Pt-doped Sn nanoscrystals embedded in carbon matrix and their gas sensing characteristics were investigated. The formation of hollow morphology was attributed to the nanoscale Kirkendall effect due to rapid outward diffusion of Sn ions and relatively slow inward diffusion of oxygen. Pure SnO2 hollow nanospheres showed a high response (resistance ratio) of 93.3 when exposed to 5 ppm ethanol. The response to 5 ppm ethanol was significantly increased to 1399.9 with doping 0.3 wt% Pt. In addition, selectivity to ethanol was also enhanced by Pt doping. Ultrasensitive and selective detection of ethanol in pure and Pt-doped SnO2 nanospheres is explained by the effective electron depletion in hollow structures and catalytic promotion of gas sensing reaction.
KW - Gas sensor
KW - Hollow spheres
KW - Kirkendall diffusion
KW - Sensitivity
KW - SnO
UR - http://www.scopus.com/inward/record.url?scp=84966908024&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84966908024&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2016.05.002
DO - 10.1016/j.snb.2016.05.002
M3 - Article
VL - 234
SP - 353
EP - 360
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -