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 language | English |
|---|---|
| Pages (from-to) | 18644-18650 |
| Number of pages | 7 |
| Journal | Nanoscale |
| Volume | 9 |
| Issue number | 47 |
| DOIs | |
| Publication status | Published - 2017 Dec 21 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
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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 journal › Article
TY - JOUR
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
M3 - Article
VL - 9
SP - 18644
EP - 18650
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 47
ER -