DataVXACS Applied Nano MaterialsPaper
journal article·2021-04-23Open access

Direct Observation of Charge Transfer between NOx and Monolayer MoS2 by Operando Scanning Photoelectron Microscopy

Ingvild J. T. Jensen, Ayaz Ali, Patrick Zeller, Matteo Amati, Matthias Schrade, Per Erik Vullum, Marta Benthem Muñiz, Prashant Bisht, Takashi Taniguchi, Kenji Watanabe, Bodh Raj Mehta, Luca Gregoratti, Branson D. Belle

ACS Applied Nano Materials· Volume 4· Issue 4
Publisher pageOpen full text
Source abstract

Abstract

Atomically thin transition-metal dichalcogenides (MoS2, WSe2, etc.) have long been touted as promising materials for gas detection because of their tunable band gaps; however, the sensing mechanism, based on a charge-transfer process, has not been fully explored. Here, we directly observe the effect of this charge transfer on the doping levels in MoS2 upon exposure to NOx by performing scanning photoelectron microscopy (SPEM) on a monolayer MoS2 transistor under bias conditions in a gas environment. By a comparison of the operando SPEM maps of the transistor with and without exposure to NOx gas, a downward shift in the Fermi level position could be detected, consistent with NOx gas making the MoS2 channel less n-type.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: 2D Materials and Applications · Gas Sensing Nanomaterials and Sensors · Transition Metal Oxide Nanomaterials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Sustainable Energy Technology, SINTEF, Forskningsveien 1, 0373 Oslo, Norway

Department of Smart Sensor Systems, SINTEF, Forskningsveien 1, 0373 Oslo, Norway

Department of Electronic Engineering, University of Sindh, 76080 Jamshoro, Pakistan

Elettra Sincrotrone Trieste S.C.p.A., SS14-Km163.5, 34149 Trieste, Italy

Helmholtz-Zentrum Berlin für Materialien and Energie GmbH, BESSY II, Albert-Einstein-Straße 15, 12489 Berlin, Germany

Department of Inorganic Chemistry, Fritz-Haber-Institute of the Max Planck Society, Faradayweg 4−6, 14195 Berlin, Germany

Department of Materials and Nanotechnology, SINTEF, Høgskoleringen 5, 7034 Trondheim, Norway

Institut de Physique de la Matière Complexe, Ecole Polytechnique Fèdèrale de Lausanne, 1015 Lausanne, Switzerland

Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, 110016 Delhi, India

International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

Funding

Ministry of Education, Culture, Sports, Science and Technology · Norges Forskningsråd · Core Research for Evolutional Science and Technology · Japan Society for the Promotion of Science

References (30)

Show source-provided references
1. 10.1021/es400744g10.1021/es400744g ↗
2. 10.1289/ehp.94102s10510.1289/ehp.94102s105 ↗
3. 10.1016/j.snb.2011.08.03210.1016/j.snb.2011.08.032 ↗
4. 10.1021/acsnano.8b0877810.1021/acsnano.8b08778 ↗
5. 10.1038/ncomms756310.1038/ncomms7563 ↗
6. 10.1038/srep2918410.1038/srep29184 ↗
7. 10.1021/acsnano.7b0381910.1021/acsnano.7b03819 ↗
8. 10.1038/nnano.2010.27910.1038/nnano.2010.279 ↗
9. 10.1016/j.sna.2020.11224710.1016/j.sna.2020.112247 ↗
10. 10.1002/asia.20130017410.1002/asia.201300174 ↗
11. 10.1038/srep0805210.1038/srep08052 ↗
12. 10.1088/1361-6528/aa718310.1088/1361-6528/aa7183 ↗
13. 10.1021/nn400026u10.1021/nn400026u ↗
14. 10.1021/acsnano.6b0174210.1021/acsnano.6b01742 ↗
15. 10.1007/s11244-018-0982-610.1007/s11244-018-0982-6 ↗
16. 10.1002/pssa.20180030810.1002/pssa.201800308 ↗
17. 10.1088/2053-1583/1/1/01100210.1088/2053-1583/1/1/011002 ↗
18. 10.1002/smll.20110101610.1002/smll.201101016 ↗
19. 10.1021/nn500532f10.1021/nn500532f ↗
20. 10.1088/1361-6528/ab227710.1088/1361-6528/ab2277 ↗
21. 10.1186/1556-276X-8-42510.1186/1556-276X-8-425 ↗
22. 10.1038/s41598-017-15577-110.1038/s41598-017-15577-1 ↗
23. 10.3390/nano906088210.3390/nano9060882 ↗
24. 10.1039/C5NR04592D10.1039/C5NR04592D ↗
25. 10.1021/nl500654210.1021/nl5006542 ↗
26. 10.1103/PhysRevB.85.20530210.1103/PhysRevB.85.205302 ↗
27. 10.1038/ncomms1304410.1038/ncomms13044 ↗
28. 10.1021/acsanm.0c0238510.1021/acsanm.0c02385 ↗
29. 10.1038/ncomms364210.1038/ncomms3642 ↗
30. 10.1038/s41557-018-0136-210.1038/s41557-018-0136-2 ↗