Facile control of C2H5OH sensing characteristics by decorating discrete Ag nanoclusters on SnO2 nanowire networks

In Sung Hwang; Joong Ki Choi; Hyung Sik Woo; Sun Jung Kim; Se Yeon Jung; Tae Yeon Seong; Il Doo Kim; Jong Heun Lee

doi:10.1021/am200647f

Facile control of C₂H₅OH sensing characteristics by decorating discrete Ag nanoclusters on SnO₂ nanowire networks

In Sung Hwang, Joong Ki Choi, Hyung Sik Woo, Sun Jung Kim, Se Yeon Jung, Tae Yeon Seong, Il Doo Kim, Jong Heun Lee

Research output: Contribution to journal › Article › peer-review

233 Citations (Scopus)

Abstract

The effect of Ag decoration on the gas sensing characteristics of SnO ₂ nanowire (NW) networks was investigated. The Ag layers with thicknesses of 5-50 nm were uniformly coated on the surface of SnO₂ NWs via e-beam evaporation, which were converted into isolated or continuous configurations of Ag islands by heat treatment at 450 °C for 2 h. The SnO₂ NWs decorated by isolated Ag nano-islands displayed a 3.7-fold enhancement in gas response to 100 ppm C₂H₅OH at 450 °C compared to pristine SnO₂ NWs. In contrast, as the Ag decoration layers became continuous, the response to C₂H ₅OH decreased significantly. The enhancement and deterioration of the C₂H₅OH sensing characteristics by the introduction of the Ag decoration layer were strongly governed by the morphological configurations of the Ag catalysts on SnO₂ NWs and their sensitization mechanism.

Original language	English
Pages (from-to)	3140-3145
Number of pages	6
Journal	ACS Applied Materials and Interfaces
Volume	3
Issue number	8
DOIs	https://doi.org/10.1021/am200647f
Publication status	Published - 2011 Aug 24

Keywords

Ag catalyst
SnOnanowires
electronic sensitization
gas sensor

ASJC Scopus subject areas

Materials Science(all)

Access to Document

10.1021/am200647f

Cite this

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title = "Facile control of C2H5OH sensing characteristics by decorating discrete Ag nanoclusters on SnO2 nanowire networks",

abstract = "The effect of Ag decoration on the gas sensing characteristics of SnO 2 nanowire (NW) networks was investigated. The Ag layers with thicknesses of 5-50 nm were uniformly coated on the surface of SnO2 NWs via e-beam evaporation, which were converted into isolated or continuous configurations of Ag islands by heat treatment at 450 °C for 2 h. The SnO2 NWs decorated by isolated Ag nano-islands displayed a 3.7-fold enhancement in gas response to 100 ppm C2H5OH at 450 °C compared to pristine SnO2 NWs. In contrast, as the Ag decoration layers became continuous, the response to C2H 5OH decreased significantly. The enhancement and deterioration of the C2H5OH sensing characteristics by the introduction of the Ag decoration layer were strongly governed by the morphological configurations of the Ag catalysts on SnO2 NWs and their sensitization mechanism.",

keywords = "Ag catalyst, SnOnanowires, electronic sensitization, gas sensor",

author = "Hwang, {In Sung} and Choi, {Joong Ki} and Woo, {Hyung Sik} and Kim, {Sun Jung} and Jung, {Se Yeon} and Seong, {Tae Yeon} and Kim, {Il Doo} and Lee, {Jong Heun}",

year = "2011",

month = aug,

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doi = "10.1021/am200647f",

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AU - Hwang, In Sung

AU - Choi, Joong Ki

AU - Woo, Hyung Sik

AU - Kim, Sun Jung

AU - Jung, Se Yeon

AU - Seong, Tae Yeon

AU - Kim, Il Doo

AU - Lee, Jong Heun

PY - 2011/8/24

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N2 - The effect of Ag decoration on the gas sensing characteristics of SnO 2 nanowire (NW) networks was investigated. The Ag layers with thicknesses of 5-50 nm were uniformly coated on the surface of SnO2 NWs via e-beam evaporation, which were converted into isolated or continuous configurations of Ag islands by heat treatment at 450 °C for 2 h. The SnO2 NWs decorated by isolated Ag nano-islands displayed a 3.7-fold enhancement in gas response to 100 ppm C2H5OH at 450 °C compared to pristine SnO2 NWs. In contrast, as the Ag decoration layers became continuous, the response to C2H 5OH decreased significantly. The enhancement and deterioration of the C2H5OH sensing characteristics by the introduction of the Ag decoration layer were strongly governed by the morphological configurations of the Ag catalysts on SnO2 NWs and their sensitization mechanism.

AB - The effect of Ag decoration on the gas sensing characteristics of SnO 2 nanowire (NW) networks was investigated. The Ag layers with thicknesses of 5-50 nm were uniformly coated on the surface of SnO2 NWs via e-beam evaporation, which were converted into isolated or continuous configurations of Ag islands by heat treatment at 450 °C for 2 h. The SnO2 NWs decorated by isolated Ag nano-islands displayed a 3.7-fold enhancement in gas response to 100 ppm C2H5OH at 450 °C compared to pristine SnO2 NWs. In contrast, as the Ag decoration layers became continuous, the response to C2H 5OH decreased significantly. The enhancement and deterioration of the C2H5OH sensing characteristics by the introduction of the Ag decoration layer were strongly governed by the morphological configurations of the Ag catalysts on SnO2 NWs and their sensitization mechanism.

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