Abstract
Black phosphorus (BP), especially in its two-dimensional (2D) form, is an intriguing material because it exhibits higher chemical sensing ability as compared to other thin-film and 2D materials. However, its implementation into hydrogen sensors has been limited due to its insensitivity toward hydrogen. We functionalized exfoliated BP flakes with Pt nanoparticles to improve their hydrogen sensing efficiency. Pt-functionalized BP sensors with back-gated field-effect transistor configuration exhibited a fast response/decay, excellent reproducibility, and high sensitivities (over 50%) at room temperature. Langmuir isotherm model was employed to analyze the Pt-catalyzed BP sensors. Furthermore, the activation energy of hydrogen adsorption on Pt-decorated BP was evaluated, which is equal to the change in work function resulting from hydrogen adsorption on the Pt(111) surface. These results demonstrate that Pt-catalyzed BP exhibits a great potential for next-generation hydrogen sensors.
| Original language | English |
|---|---|
| Article number | 242103 |
| Journal | Applied Physics Letters |
| Volume | 110 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 2017 Jun 12 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Platinum-functionalized black phosphorus hydrogen sensors. / Lee, Geonyeop; Jung, Sunwoo; Jang, Soohwan; Kim, Ji Hyun.
In: Applied Physics Letters, Vol. 110, No. 24, 242103, 12.06.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Platinum-functionalized black phosphorus hydrogen sensors
AU - Lee, Geonyeop
AU - Jung, Sunwoo
AU - Jang, Soohwan
AU - Kim, Ji Hyun
PY - 2017/6/12
Y1 - 2017/6/12
N2 - Black phosphorus (BP), especially in its two-dimensional (2D) form, is an intriguing material because it exhibits higher chemical sensing ability as compared to other thin-film and 2D materials. However, its implementation into hydrogen sensors has been limited due to its insensitivity toward hydrogen. We functionalized exfoliated BP flakes with Pt nanoparticles to improve their hydrogen sensing efficiency. Pt-functionalized BP sensors with back-gated field-effect transistor configuration exhibited a fast response/decay, excellent reproducibility, and high sensitivities (over 50%) at room temperature. Langmuir isotherm model was employed to analyze the Pt-catalyzed BP sensors. Furthermore, the activation energy of hydrogen adsorption on Pt-decorated BP was evaluated, which is equal to the change in work function resulting from hydrogen adsorption on the Pt(111) surface. These results demonstrate that Pt-catalyzed BP exhibits a great potential for next-generation hydrogen sensors.
AB - Black phosphorus (BP), especially in its two-dimensional (2D) form, is an intriguing material because it exhibits higher chemical sensing ability as compared to other thin-film and 2D materials. However, its implementation into hydrogen sensors has been limited due to its insensitivity toward hydrogen. We functionalized exfoliated BP flakes with Pt nanoparticles to improve their hydrogen sensing efficiency. Pt-functionalized BP sensors with back-gated field-effect transistor configuration exhibited a fast response/decay, excellent reproducibility, and high sensitivities (over 50%) at room temperature. Langmuir isotherm model was employed to analyze the Pt-catalyzed BP sensors. Furthermore, the activation energy of hydrogen adsorption on Pt-decorated BP was evaluated, which is equal to the change in work function resulting from hydrogen adsorption on the Pt(111) surface. These results demonstrate that Pt-catalyzed BP exhibits a great potential for next-generation hydrogen sensors.
UR - http://www.scopus.com/inward/record.url?scp=85020523306&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85020523306&partnerID=8YFLogxK
U2 - 10.1063/1.4985708
DO - 10.1063/1.4985708
M3 - Article
AN - SCOPUS:85020523306
VL - 110
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 24
M1 - 242103
ER -