Improvement of Gas-Sensing Performance of Large-Area Tungsten Disulfide Nanosheets by Surface Functionalization

Kyung Yong Ko; Jeong Gyu Song; Youngjun Kim; Taejin Choi; Sera Shin; Chang Wan Lee; Kyounghoon Lee; Jahyun Koo; Hoonkyung Lee; Jongbaeg Kim; Taeyoon Lee; Jusang Park; Hyungjun Kim

doi:10.1021/acsnano.6b03631

Improvement of Gas-Sensing Performance of Large-Area Tungsten Disulfide Nanosheets by Surface Functionalization

Kyung Yong Ko, Jeong Gyu Song, Youngjun Kim, Taejin Choi, Sera Shin, Chang Wan Lee, Kyounghoon Lee, Jahyun Koo, Hoonkyung Lee, Jongbaeg Kim, Taeyoon Lee, Jusang Park, Hyungjun Kim

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

297 Citations (Scopus)

Abstract

Semiconducting two-dimensional (2D) transition metal dichalcogenides (TMDCs) are promising gas-sensing materials due to their large surface-to-volume ratio. However, their poor gas-sensing performance resulting from the low response, incomplete recovery, and insufficient selectivity hinders the realization of high-performance 2D TMDC gas sensors. Here, we demonstrate the improvement of gas-sensing performance of large-area tungsten disulfide (WS₂) nanosheets through surface functionalization using Ag nanowires (NWs). Large-area WS₂ nanosheets were synthesized through atomic layer deposition of WO₃ followed by sulfurization. The pristine WS₂ gas sensors exhibited a significant response to acetone and NO₂ but an incomplete recovery in the case of NO₂ sensing. After AgNW functionalization, the WS₂ gas sensor showed dramatically improved response (667%) and recovery upon NO₂ exposure. Our results establish that the proposed method is a promising strategy to improve 2D TMDC gas sensors.

Original language	English
Pages (from-to)	9287-9296
Number of pages	10
Journal	ACS Nano
Volume	10
Issue number	10
DOIs	https://doi.org/10.1021/acsnano.6b03631
Publication status	Published - 2016 Oct 25

Bibliographical note

Funding Information:
This work was supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as Global Frontier Project (CISS-2011-0031848). In addition, this work was supported by Korea Evaluation Institute of Industrial Technology (KEIT) funded by the Ministry of Trade, Industry and Energy (MOTIE) (Project No. 10050296, Large scale (Over 8)

Publisher Copyright:
© 2016 American Chemical Society.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Engineering(all)
Physics and Astronomy(all)

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10.1021/acsnano.6b03631

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title = "Improvement of Gas-Sensing Performance of Large-Area Tungsten Disulfide Nanosheets by Surface Functionalization",

abstract = "Semiconducting two-dimensional (2D) transition metal dichalcogenides (TMDCs) are promising gas-sensing materials due to their large surface-to-volume ratio. However, their poor gas-sensing performance resulting from the low response, incomplete recovery, and insufficient selectivity hinders the realization of high-performance 2D TMDC gas sensors. Here, we demonstrate the improvement of gas-sensing performance of large-area tungsten disulfide (WS2) nanosheets through surface functionalization using Ag nanowires (NWs). Large-area WS2 nanosheets were synthesized through atomic layer deposition of WO3 followed by sulfurization. The pristine WS2 gas sensors exhibited a significant response to acetone and NO2 but an incomplete recovery in the case of NO2 sensing. After AgNW functionalization, the WS2 gas sensor showed dramatically improved response (667%) and recovery upon NO2 exposure. Our results establish that the proposed method is a promising strategy to improve 2D TMDC gas sensors.",

author = "Ko, {Kyung Yong} and Song, {Jeong Gyu} and Youngjun Kim and Taejin Choi and Sera Shin and Lee, {Chang Wan} and Kyounghoon Lee and Jahyun Koo and Hoonkyung Lee and Jongbaeg Kim and Taeyoon Lee and Jusang Park and Hyungjun Kim",

note = "Funding Information: This work was supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as Global Frontier Project (CISS-2011-0031848). In addition, this work was supported by Korea Evaluation Institute of Industrial Technology (KEIT) funded by the Ministry of Trade, Industry and Energy (MOTIE) (Project No. 10050296, Large scale (Over 8) Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

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AU - Shin, Sera

AU - Lee, Chang Wan

AU - Lee, Kyounghoon

AU - Koo, Jahyun

AU - Lee, Hoonkyung

AU - Kim, Jongbaeg

AU - Lee, Taeyoon

AU - Park, Jusang

AU - Kim, Hyungjun

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PY - 2016/10/25

Y1 - 2016/10/25

N2 - Semiconducting two-dimensional (2D) transition metal dichalcogenides (TMDCs) are promising gas-sensing materials due to their large surface-to-volume ratio. However, their poor gas-sensing performance resulting from the low response, incomplete recovery, and insufficient selectivity hinders the realization of high-performance 2D TMDC gas sensors. Here, we demonstrate the improvement of gas-sensing performance of large-area tungsten disulfide (WS2) nanosheets through surface functionalization using Ag nanowires (NWs). Large-area WS2 nanosheets were synthesized through atomic layer deposition of WO3 followed by sulfurization. The pristine WS2 gas sensors exhibited a significant response to acetone and NO2 but an incomplete recovery in the case of NO2 sensing. After AgNW functionalization, the WS2 gas sensor showed dramatically improved response (667%) and recovery upon NO2 exposure. Our results establish that the proposed method is a promising strategy to improve 2D TMDC gas sensors.

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Improvement of Gas-Sensing Performance of Large-Area Tungsten Disulfide Nanosheets by Surface Functionalization

Abstract

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