Gas molecule sensing of van der Waals tunnel field effect transistors

Hong Kyw Choi, Jaesung Park, Nojoon Myoung, Ho Jong Kim, Jin Sik Choi, Young Kyu Choi, Chi Young Hwang, Jin Tae Kim, Serin Park, Yoonsik Yi, Soo Kyung Chang, Hee Chul Park, Chanyong Hwang, Choon Gi Choi, Young Jun Yu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

van der Waals (vdW) heterostructures with two-dimensional (2D) crystals such as graphene, hexagonal boron nitride (hBN) and transition metal dichalcogenides (TMDCs) allow us to demonstrate atomically thin field-effect transistors (FETs), photodetectors (PDs) and photovoltaic devices capable of higher performance and greater stability levels than conventional devices. Although there have been studies of gas molecule sensing with 2D crystal channels, vdW heterostructures based on 2D crystals have not been employed thus far. Here, utilizing graphene/WS2/graphene (G/WS2/G) vdW heterostructure tunnel FETs, we demonstrate the rectification behavior of the sensitivity signal by tuning the WS2 potential barriers as a function of the gas molecule concentration and devise a fingerprint map of the sensitivity variation corresponding to an individual ratio of two different molecules in a gas mixture. Because the separation of different gas molecule concentrations from gas mixtures is in high demand in the gas-sensing research field, this result will greatly assist in the progress on selective gas sensing.

Original languageEnglish
Pages (from-to)18644-18650
Number of pages7
JournalNanoscale
Volume9
Issue number47
DOIs
Publication statusPublished - 2017 Dec 21

Fingerprint

Field effect transistors
Tunnels
Gases
Graphite
Molecules
Graphene
Heterojunctions
Gas mixtures
Crystals
Boron nitride
Photodetectors
Transition metals
Tuning

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Choi, H. K., Park, J., Myoung, N., Kim, H. J., Choi, J. S., Choi, Y. K., ... Yu, Y. J. (2017). Gas molecule sensing of van der Waals tunnel field effect transistors. Nanoscale, 9(47), 18644-18650. https://doi.org/10.1039/c7nr05712a
Choi, Hong Kyw ; Park, Jaesung ; Myoung, Nojoon ; Kim, Ho Jong ; Choi, Jin Sik ; Choi, Young Kyu ; Hwang, Chi Young ; Kim, Jin Tae ; Park, Serin ; Yi, Yoonsik ; Chang, Soo Kyung ; Park, Hee Chul ; Hwang, Chanyong ; Choi, Choon Gi ; Yu, Young Jun. / Gas molecule sensing of van der Waals tunnel field effect transistors. In: Nanoscale. 2017 ; Vol. 9, No. 47. pp. 18644-18650.
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Choi, HK, Park, J, Myoung, N, Kim, HJ, Choi, JS, Choi, YK, Hwang, CY, Kim, JT, Park, S, Yi, Y, Chang, SK, Park, HC, Hwang, C, Choi, CG & Yu, YJ 2017, 'Gas molecule sensing of van der Waals tunnel field effect transistors', Nanoscale, vol. 9, no. 47, pp. 18644-18650. https://doi.org/10.1039/c7nr05712a

Gas molecule sensing of van der Waals tunnel field effect transistors. / Choi, Hong Kyw; Park, Jaesung; Myoung, Nojoon; Kim, Ho Jong; Choi, Jin Sik; Choi, Young Kyu; Hwang, Chi Young; Kim, Jin Tae; Park, Serin; Yi, Yoonsik; Chang, Soo Kyung; Park, Hee Chul; Hwang, Chanyong; Choi, Choon Gi; Yu, Young Jun.

In: Nanoscale, Vol. 9, No. 47, 21.12.2017, p. 18644-18650.

Research output: Contribution to journalArticle

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T1 - Gas molecule sensing of van der Waals tunnel field effect transistors

AU - Choi, Hong Kyw

AU - Park, Jaesung

AU - Myoung, Nojoon

AU - Kim, Ho Jong

AU - Choi, Jin Sik

AU - Choi, Young Kyu

AU - Hwang, Chi Young

AU - Kim, Jin Tae

AU - Park, Serin

AU - Yi, Yoonsik

AU - Chang, Soo Kyung

AU - Park, Hee Chul

AU - Hwang, Chanyong

AU - Choi, Choon Gi

AU - Yu, Young Jun

PY - 2017/12/21

Y1 - 2017/12/21

N2 - van der Waals (vdW) heterostructures with two-dimensional (2D) crystals such as graphene, hexagonal boron nitride (hBN) and transition metal dichalcogenides (TMDCs) allow us to demonstrate atomically thin field-effect transistors (FETs), photodetectors (PDs) and photovoltaic devices capable of higher performance and greater stability levels than conventional devices. Although there have been studies of gas molecule sensing with 2D crystal channels, vdW heterostructures based on 2D crystals have not been employed thus far. Here, utilizing graphene/WS2/graphene (G/WS2/G) vdW heterostructure tunnel FETs, we demonstrate the rectification behavior of the sensitivity signal by tuning the WS2 potential barriers as a function of the gas molecule concentration and devise a fingerprint map of the sensitivity variation corresponding to an individual ratio of two different molecules in a gas mixture. Because the separation of different gas molecule concentrations from gas mixtures is in high demand in the gas-sensing research field, this result will greatly assist in the progress on selective gas sensing.

AB - van der Waals (vdW) heterostructures with two-dimensional (2D) crystals such as graphene, hexagonal boron nitride (hBN) and transition metal dichalcogenides (TMDCs) allow us to demonstrate atomically thin field-effect transistors (FETs), photodetectors (PDs) and photovoltaic devices capable of higher performance and greater stability levels than conventional devices. Although there have been studies of gas molecule sensing with 2D crystal channels, vdW heterostructures based on 2D crystals have not been employed thus far. Here, utilizing graphene/WS2/graphene (G/WS2/G) vdW heterostructure tunnel FETs, we demonstrate the rectification behavior of the sensitivity signal by tuning the WS2 potential barriers as a function of the gas molecule concentration and devise a fingerprint map of the sensitivity variation corresponding to an individual ratio of two different molecules in a gas mixture. Because the separation of different gas molecule concentrations from gas mixtures is in high demand in the gas-sensing research field, this result will greatly assist in the progress on selective gas sensing.

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U2 - 10.1039/c7nr05712a

DO - 10.1039/c7nr05712a

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Choi HK, Park J, Myoung N, Kim HJ, Choi JS, Choi YK et al. Gas molecule sensing of van der Waals tunnel field effect transistors. Nanoscale. 2017 Dec 21;9(47):18644-18650. https://doi.org/10.1039/c7nr05712a