Utilization of both-side metal decoration in close-packed SnO2 nanodome arrays for ultrasensitive gas sensing

Young Seok Shim; Do Hong Kim; Hu Young Jeong; Yeon Hoo Kim; Seung Hoon Nahm; Chong Yun Kang; Jin Sang Kim; Wooyoung Lee; Ho Won Jang

doi:10.1016/j.snb.2015.02.103

Utilization of both-side metal decoration in close-packed SnO₂ nanodome arrays for ultrasensitive gas sensing

Young Seok Shim, Do Hong Kim, Hu Young Jeong, Yeon Hoo Kim, Seung Hoon Nahm, Chong Yun Kang, Jin Sang Kim, Wooyoung Lee, Ho Won Jang

Department of Materials Science and Engineering

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

25 Citations (Scopus)

Abstract

Metal decoration on hollow metal oxide nanostructures is an attractive route to enhance gas sensing properties. Herein, we present a facile method for the utilization of metal decoration on both the inner and outer surfaces of hollow metal oxide nanostructure for the first time. Close-packed SnO₂ nanodome arrays decorated with Au nanoparticles are fabricated by soft-template method and self-agglomeration of an Au film. The position of Au decoration for SnO₂ nanodome arrays is controlled by changing the deposition sequence of Au and SnO₂ films. While inside, outside, and both-side Au-decorated SnO₂ nanodome arrays show much higher responses to various gases than a bare SnO₂ nanodome, it is shown that the response of both-side Au-decorated SnO₂ nanodome arrays to C₂H₅OH at 300 °C is 18 times higher than that of the bare SnO₂ nanodome arrays and the theoretical detection limit is below 1 ppb. These are attributed to the catalytic effect of Au nanoparticles on the modulation of barrier potentials in links between the individual SnO₂ nanodomes. Our results demonstrate that the utilization of both-side metal decoration is an effective strategy for enhancing the gas sensing performance of hollow metal oxide nanostructures.

Original language	English
Pages (from-to)	314-321
Number of pages	8
Journal	Sensors and Actuators, B: Chemical
Volume	213
DOIs	https://doi.org/10.1016/j.snb.2015.02.103
Publication status	Published - 2015 Jul 5

Bibliographical note

Funding Information:
This work was financially supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as the Global Frontier Project, the Fusion Research Program for Green Technologies and the Outstanding Young Researcher Program (2013R1A1A1005928) through the National Research Foundation of Korea , the Aspiring Researcher Program through Seoul National University in 2013 and a research program of the Korea Institute of Science and Technology .

Publisher Copyright:
© 2015 Elsevier B.V.. All rights reserved.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1016/j.snb.2015.02.103

Cite this

@article{ab31ad775729496b81b256ee6bc8500c,

title = "Utilization of both-side metal decoration in close-packed SnO2 nanodome arrays for ultrasensitive gas sensing",

abstract = "Metal decoration on hollow metal oxide nanostructures is an attractive route to enhance gas sensing properties. Herein, we present a facile method for the utilization of metal decoration on both the inner and outer surfaces of hollow metal oxide nanostructure for the first time. Close-packed SnO2 nanodome arrays decorated with Au nanoparticles are fabricated by soft-template method and self-agglomeration of an Au film. The position of Au decoration for SnO2 nanodome arrays is controlled by changing the deposition sequence of Au and SnO2 films. While inside, outside, and both-side Au-decorated SnO2 nanodome arrays show much higher responses to various gases than a bare SnO2 nanodome, it is shown that the response of both-side Au-decorated SnO2 nanodome arrays to C2H5OH at 300 °C is 18 times higher than that of the bare SnO2 nanodome arrays and the theoretical detection limit is below 1 ppb. These are attributed to the catalytic effect of Au nanoparticles on the modulation of barrier potentials in links between the individual SnO2 nanodomes. Our results demonstrate that the utilization of both-side metal decoration is an effective strategy for enhancing the gas sensing performance of hollow metal oxide nanostructures.",

author = "Shim, {Young Seok} and Kim, {Do Hong} and Jeong, {Hu Young} and Kim, {Yeon Hoo} and Nahm, {Seung Hoon} and Kang, {Chong Yun} and Kim, {Jin Sang} and Wooyoung Lee and Jang, {Ho Won}",

note = "Funding Information: This work was financially supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as the Global Frontier Project, the Fusion Research Program for Green Technologies and the Outstanding Young Researcher Program (2013R1A1A1005928) through the National Research Foundation of Korea , the Aspiring Researcher Program through Seoul National University in 2013 and a research program of the Korea Institute of Science and Technology . Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.. All rights reserved.",

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doi = "10.1016/j.snb.2015.02.103",

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AU - Shim, Young Seok

AU - Kim, Do Hong

AU - Jeong, Hu Young

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AU - Nahm, Seung Hoon

AU - Kang, Chong Yun

AU - Kim, Jin Sang

AU - Lee, Wooyoung

AU - Jang, Ho Won

N1 - Funding Information: This work was financially supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as the Global Frontier Project, the Fusion Research Program for Green Technologies and the Outstanding Young Researcher Program (2013R1A1A1005928) through the National Research Foundation of Korea , the Aspiring Researcher Program through Seoul National University in 2013 and a research program of the Korea Institute of Science and Technology . Publisher Copyright: © 2015 Elsevier B.V.. All rights reserved.

PY - 2015/7/5

Y1 - 2015/7/5

N2 - Metal decoration on hollow metal oxide nanostructures is an attractive route to enhance gas sensing properties. Herein, we present a facile method for the utilization of metal decoration on both the inner and outer surfaces of hollow metal oxide nanostructure for the first time. Close-packed SnO2 nanodome arrays decorated with Au nanoparticles are fabricated by soft-template method and self-agglomeration of an Au film. The position of Au decoration for SnO2 nanodome arrays is controlled by changing the deposition sequence of Au and SnO2 films. While inside, outside, and both-side Au-decorated SnO2 nanodome arrays show much higher responses to various gases than a bare SnO2 nanodome, it is shown that the response of both-side Au-decorated SnO2 nanodome arrays to C2H5OH at 300 °C is 18 times higher than that of the bare SnO2 nanodome arrays and the theoretical detection limit is below 1 ppb. These are attributed to the catalytic effect of Au nanoparticles on the modulation of barrier potentials in links between the individual SnO2 nanodomes. Our results demonstrate that the utilization of both-side metal decoration is an effective strategy for enhancing the gas sensing performance of hollow metal oxide nanostructures.

AB - Metal decoration on hollow metal oxide nanostructures is an attractive route to enhance gas sensing properties. Herein, we present a facile method for the utilization of metal decoration on both the inner and outer surfaces of hollow metal oxide nanostructure for the first time. Close-packed SnO2 nanodome arrays decorated with Au nanoparticles are fabricated by soft-template method and self-agglomeration of an Au film. The position of Au decoration for SnO2 nanodome arrays is controlled by changing the deposition sequence of Au and SnO2 films. While inside, outside, and both-side Au-decorated SnO2 nanodome arrays show much higher responses to various gases than a bare SnO2 nanodome, it is shown that the response of both-side Au-decorated SnO2 nanodome arrays to C2H5OH at 300 °C is 18 times higher than that of the bare SnO2 nanodome arrays and the theoretical detection limit is below 1 ppb. These are attributed to the catalytic effect of Au nanoparticles on the modulation of barrier potentials in links between the individual SnO2 nanodomes. Our results demonstrate that the utilization of both-side metal decoration is an effective strategy for enhancing the gas sensing performance of hollow metal oxide nanostructures.

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