Fabrication of metal-shelled coaxial nanowires and annealing-induced formation of metal nanoparticles for catalytic applications: Growth and characteristics of SnO2-branched nanostructures

Hyo Sung Kim; Sang Eon Park; Hyoun Woo Kim; Jae Young Park; Nanzhe Jiang; Sang Sub Kim

doi:10.1016/j.solidstatesciences.2009.04.033

Fabrication of metal-shelled coaxial nanowires and annealing-induced formation of metal nanoparticles for catalytic applications: Growth and characteristics of SnO₂-branched nanostructures

Hyo Sung Kim, Sang Eon Park, Hyoun Woo Kim, Jae Young Park, Nanzhe Jiang, Sang Sub Kim

Inha University

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

10 Scopus citations

Abstract

We have fabricated SnO₂ branches on SiO_x stem nanowires, via a novel multi-step process. With the SnO₂ branches having diameters in the range 20-80 nm, X-ray diffraction, transmission electron microscopy and selected area diffraction pattern coincidentally revealed that the branches were crystalline rutile SnO₂ structures. We suggested that a Ag-catalyzed base-growth vapor-liquid-solid growth mechanism was responsible for the growth of SnO₂ branches. Photoluminescence analysis indicated that the Ag-coated SiOx nanowires exhibited emission bands centered at 2.6 eV and 3.1 eV, presumably from the SiOx core nanowires. Subsequent annealing induced 2.4-eV band, whereas the growth of SnO₂ branches induced 2.1-eV band. For the branched product, we have investigated the O₂ and NO₂ sensing properties. A linear relationship between sensitivity and the O₂ gas concentration was observed, which demon-strates its potential application to chemical sensors.

Original language	English
Pages (from-to)	970-977
Number of pages	8
Journal	Solid State Sciences
Volume	12
Issue number	6
DOIs	https://doi.org/10.1016/j.solidstatesciences.2009.04.033
State	Published - Jun 2010

Keywords

Branched structures
Gas sensingproperties
Nanomaterials
Photoluminescence

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10.1016/j.solidstatesciences.2009.04.033

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@article{a21930d2124e4182bbecc71d5561110b,

title = "Fabrication of metal-shelled coaxial nanowires and annealing-induced formation of metal nanoparticles for catalytic applications: Growth and characteristics of SnO2-branched nanostructures",

abstract = "We have fabricated SnO2 branches on SiOx stem nanowires, via a novel multi-step process. With the SnO2 branches having diameters in the range 20-80 nm, X-ray diffraction, transmission electron microscopy and selected area diffraction pattern coincidentally revealed that the branches were crystalline rutile SnO2 structures. We suggested that a Ag-catalyzed base-growth vapor-liquid-solid growth mechanism was responsible for the growth of SnO2 branches. Photoluminescence analysis indicated that the Ag-coated SiOx nanowires exhibited emission bands centered at 2.6 eV and 3.1 eV, presumably from the SiOx core nanowires. Subsequent annealing induced 2.4-eV band, whereas the growth of SnO2 branches induced 2.1-eV band. For the branched product, we have investigated the O2 and NO2 sensing properties. A linear relationship between sensitivity and the O2 gas concentration was observed, which demon-strates its potential application to chemical sensors.",

keywords = "Branched structures, Gas sensingproperties, Nanomaterials, Photoluminescence",

author = "Kim, {Hyo Sung} and Park, {Sang Eon} and Kim, {Hyoun Woo} and Park, {Jae Young} and Nanzhe Jiang and Kim, {Sang Sub}",

year = "2010",

month = jun,

doi = "10.1016/j.solidstatesciences.2009.04.033",

language = "English",

volume = "12",

pages = "970--977",

journal = "Solid State Sciences",

issn = "1293-2558",

publisher = "Elsevier Masson s.r.l.",

number = "6",

}

Fabrication of metal-shelled coaxial nanowires and annealing-induced formation of metal nanoparticles for catalytic applications: Growth and characteristics of SnO₂-branched nanostructures. / Kim, Hyo Sung; Park, Sang Eon; Kim, Hyoun Woo et al.
In: Solid State Sciences, Vol. 12, No. 6, 06.2010, p. 970-977.

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

TY - JOUR

T1 - Fabrication of metal-shelled coaxial nanowires and annealing-induced formation of metal nanoparticles for catalytic applications

T2 - Growth and characteristics of SnO2-branched nanostructures

AU - Kim, Hyo Sung

AU - Park, Sang Eon

AU - Kim, Hyoun Woo

AU - Park, Jae Young

AU - Jiang, Nanzhe

AU - Kim, Sang Sub

PY - 2010/6

Y1 - 2010/6

N2 - We have fabricated SnO2 branches on SiOx stem nanowires, via a novel multi-step process. With the SnO2 branches having diameters in the range 20-80 nm, X-ray diffraction, transmission electron microscopy and selected area diffraction pattern coincidentally revealed that the branches were crystalline rutile SnO2 structures. We suggested that a Ag-catalyzed base-growth vapor-liquid-solid growth mechanism was responsible for the growth of SnO2 branches. Photoluminescence analysis indicated that the Ag-coated SiOx nanowires exhibited emission bands centered at 2.6 eV and 3.1 eV, presumably from the SiOx core nanowires. Subsequent annealing induced 2.4-eV band, whereas the growth of SnO2 branches induced 2.1-eV band. For the branched product, we have investigated the O2 and NO2 sensing properties. A linear relationship between sensitivity and the O2 gas concentration was observed, which demon-strates its potential application to chemical sensors.

AB - We have fabricated SnO2 branches on SiOx stem nanowires, via a novel multi-step process. With the SnO2 branches having diameters in the range 20-80 nm, X-ray diffraction, transmission electron microscopy and selected area diffraction pattern coincidentally revealed that the branches were crystalline rutile SnO2 structures. We suggested that a Ag-catalyzed base-growth vapor-liquid-solid growth mechanism was responsible for the growth of SnO2 branches. Photoluminescence analysis indicated that the Ag-coated SiOx nanowires exhibited emission bands centered at 2.6 eV and 3.1 eV, presumably from the SiOx core nanowires. Subsequent annealing induced 2.4-eV band, whereas the growth of SnO2 branches induced 2.1-eV band. For the branched product, we have investigated the O2 and NO2 sensing properties. A linear relationship between sensitivity and the O2 gas concentration was observed, which demon-strates its potential application to chemical sensors.

KW - Branched structures

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KW - Nanomaterials

KW - Photoluminescence

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Fabrication of metal-shelled coaxial nanowires and annealing-induced formation of metal nanoparticles for catalytic applications: Growth and characteristics of SnO₂-branched nanostructures

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