Heterojunction Based on Rh-Decorated WO3 Nanorods for Morphological Change and Gas Sensor Application Using the Transition Effect

Young Geun Song; Jae Yeol Park; Jun Min Suh; Young Seok Shim; Seung Yeop Yi; Ho Won Jang; Sangtae Kim; Jong Min Yuk; Byeong Kwon Ju; Chong Yun Kang

doi:10.1021/acs.chemmater.8b04181

Heterojunction Based on Rh-Decorated WO₃ Nanorods for Morphological Change and Gas Sensor Application Using the Transition Effect

Young Geun Song, Jae Yeol Park, Jun Min Suh, Young Seok Shim, Seung Yeop Yi, Ho Won Jang, Sangtae Kim, Jong Min Yuk, Byeong Kwon Ju, Chong Yun Kang

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

77 Citations (Scopus)

Abstract

The use of heterojunctions based on Rh-decorated WO₃ nanorods is an effective strategy for achieving high-performance gas sensors for volatile organic compounds (VOCs), especially acetone (CH₃COCH₃). Herein, we successfully fabricated Rh-decorated WO₃ nanorods with one-dimensional (1D) structures by glancing angle deposition (GLAD). Interestingly, morphological changes characterized by anomalous surfaces with numerous regions of negative curvature were observed upon decoration of the bare WO₃ nanorods with Rh, which were systematically investigated on the basis of impeded surface diffusion and trapping effects. The improvements of gas sensing properties were stepwisely demonstrated by synergistic effects involving transition of Rh, high chemical potential of the negative curvature, primary decomposition at the top side, and highly ordered nanostructures. We are confident that the results provide new insight into the synthesis of effective nanostructures and contribute to a variety of applications including battery, solar water splitting, and sensor devices.

Original language	English
Pages (from-to)	207-215
Number of pages	9
Journal	Chemistry of Materials
Volume	31
Issue number	1
DOIs	https://doi.org/10.1021/acs.chemmater.8b04181
Publication status	Published - 2019 Jan 8

Bibliographical note

Funding Information:
This work was supported by an Institute for Information & Communications Technology Promotion (IITP) grant funded by the Korea government (MSIP; Ministry of Science, ICT & Future Planning) (No. 2015-0-0031, Olfactory Bio Databased Emotion Enhancement Interactive Content Technology Development) and a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP; Ministry of Science, ICT & Future Planning) (NRF-2018H1A2A1060105-Global Ph.D. Fellowship Program, NRF-2018R1C1B6002624 and NRF-2018M3A7B4065625).

Publisher Copyright:
© 2018 American Chemical Society.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acs.chemmater.8b04181

Cite this

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title = "Heterojunction Based on Rh-Decorated WO3 Nanorods for Morphological Change and Gas Sensor Application Using the Transition Effect",

abstract = "The use of heterojunctions based on Rh-decorated WO3 nanorods is an effective strategy for achieving high-performance gas sensors for volatile organic compounds (VOCs), especially acetone (CH3COCH3). Herein, we successfully fabricated Rh-decorated WO3 nanorods with one-dimensional (1D) structures by glancing angle deposition (GLAD). Interestingly, morphological changes characterized by anomalous surfaces with numerous regions of negative curvature were observed upon decoration of the bare WO3 nanorods with Rh, which were systematically investigated on the basis of impeded surface diffusion and trapping effects. The improvements of gas sensing properties were stepwisely demonstrated by synergistic effects involving transition of Rh, high chemical potential of the negative curvature, primary decomposition at the top side, and highly ordered nanostructures. We are confident that the results provide new insight into the synthesis of effective nanostructures and contribute to a variety of applications including battery, solar water splitting, and sensor devices.",

author = "Song, {Young Geun} and Park, {Jae Yeol} and Suh, {Jun Min} and Shim, {Young Seok} and Yi, {Seung Yeop} and Jang, {Ho Won} and Sangtae Kim and Yuk, {Jong Min} and Ju, {Byeong Kwon} and Kang, {Chong Yun}",

note = "Funding Information: This work was supported by an Institute for Information & Communications Technology Promotion (IITP) grant funded by the Korea government (MSIP; Ministry of Science, ICT & Future Planning) (No. 2015-0-0031, Olfactory Bio Databased Emotion Enhancement Interactive Content Technology Development) and a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP; Ministry of Science, ICT & Future Planning) (NRF-2018H1A2A1060105-Global Ph.D. Fellowship Program, NRF-2018R1C1B6002624 and NRF-2018M3A7B4065625). Publisher Copyright: {\textcopyright} 2018 American Chemical Society. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",

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AU - Shim, Young Seok

AU - Yi, Seung Yeop

AU - Jang, Ho Won

AU - Kim, Sangtae

AU - Yuk, Jong Min

AU - Ju, Byeong Kwon

AU - Kang, Chong Yun

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PY - 2019/1/8

Y1 - 2019/1/8

N2 - The use of heterojunctions based on Rh-decorated WO3 nanorods is an effective strategy for achieving high-performance gas sensors for volatile organic compounds (VOCs), especially acetone (CH3COCH3). Herein, we successfully fabricated Rh-decorated WO3 nanorods with one-dimensional (1D) structures by glancing angle deposition (GLAD). Interestingly, morphological changes characterized by anomalous surfaces with numerous regions of negative curvature were observed upon decoration of the bare WO3 nanorods with Rh, which were systematically investigated on the basis of impeded surface diffusion and trapping effects. The improvements of gas sensing properties were stepwisely demonstrated by synergistic effects involving transition of Rh, high chemical potential of the negative curvature, primary decomposition at the top side, and highly ordered nanostructures. We are confident that the results provide new insight into the synthesis of effective nanostructures and contribute to a variety of applications including battery, solar water splitting, and sensor devices.

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