The 81st JSAP Autumn Meeting, 2020

Presentation information

Oral presentation

17 Nanocarbon Technology » 17.3 Layered materials

[10a-Z29-1~14] 17.3 Layered materials

Thu. Sep 10, 2020 8:30 AM - 12:15 PM Z29

Hitoshi Wakabayashi(Tokyo Tech)

8:45 AM - 9:00 AM

[10a-Z29-2] Structure evaluation of MoS2(1-x)Te2x alloy through Mo chemical binding states analysis

Yusuke Hibino1,2, Kota Yamazaki1, Yusuke Hashimoto1, Hideaki Machida3, Masato Ishikawa3, Hiroshi Sudoh3, Hitoshi Wakabayashi4, Atsushi Ogura1,5 (1.Meiji Univ., 2.JSPS Research Fellow, 3.Gas Phase Growth Ltd., 4.Tokyo Tech, 5.MREL)

Keywords:transition metal dichalcogenides, alloy, X-ray photoelectron spectroscopy

The research on alloys of layered materials are progressing further and further recently. However, phase separation seen in, for example alloy of graphene and h-BN is one issue that needs to be solved. The same applies to the alloy of MoS2 and MoTe2. Confrimation of whether there is phase separation or not is a cricitical evaluation in alloy, and non-destructive and easy-to-perform method is preferred. In this study we propose a method using X-ray photoelectron spectroscopy. It is expected that performing 2 peak-fitting for Mo 3d orbital for MoS2(1-x)Te2x and examining the difference in the peak energy values would reveal whether the sample shows phase separation or not. In this presentation, we report how the 2 peak-fitting results for uniform alloy and actual samples with phase separation.