Surface-Bound and Volatile Mo Oxides Produced During Oxidation of Single MoS2 Crystals in Air and High Relative Humidity

Autor:	Robert Szoszkiewicz, Maciej Rogala, Paweł Dąbrowski
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	MoS2 MoO3 surface science nanoscale ripples atomic force microscopy XPS Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Zdroj:	Materials, Vol 13, Iss 14, p 3067 (2020)
Druh dokumentu:	article
ISSN:	1996-1944
DOI:	10.3390/ma13143067
Popis:	We report on the MoO3 oxides and their derivatives on microscopic 2H MoS2 flakes oxidized in air and high relative humidity at a moderate temperature range below 410 °C. We combine XPS and AFM measurements such as topography, friction, creation of nanoscale ripples and scratches on the MoS2 flakes deposited on Si substrates. We detect MoO3 oxides mostly by measuring selected nanomechanical properties of the MoO3 layer, such as its compressive mechanical stress at the plastic yield. We discuss basal surface coverage of the single MoS2 flakes by the MoO3 oxides. We discuss conditions for appearance of all possible MoO3 oxide derivatives, such as molybdenum(VI) hydroxyoxides and MoO3 hydrates. Our findings agree with an expected mechanistic switch in thermal oxidation in water vapors vs. air.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/e141addec3094dbbb566633510e0f51a Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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