Structural changes of MoS2 nano-powder in dependence on the annealing temperature

A. S. Berdinsky, L. T. Chadderton, J. B. Yoo*, A. K. Gutakovsky, V. E. Fedorov, L. N. Mazalov, D. Fink

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

To search for structural changes of molybdenum disulphide (MoS2) nano-powder under thermal treatment, the annealing of the powder was carried out in vacuum or in argon. MoS2 powder with a grain size of 3-5 nm was synthesized by a chemical method. The temperature of annealing was varied in the range of 380-1000 °C. The time of annealing was varied in the range from 4 h (380 °C) to 5 min (1000 °C). X-ray diffraction and transmission electron microscopy analyses were made to see the character of the change of the crystallization process and the curvature of (002) MoS2 planes. The increase of crystalline phase and the decrease of amorphous phase in the powder appears as a result of the rise of the annealing temperature. The sample annealed at Tann = 380 °C and 500 °C has a small curvature of (002) planes and more enlarged grains in comparison with non-annealed MoS 2 powder. The increase of the annealing temperature to T ann = 700 °C leads to a strong curvature of the (002) planes. The character of the curved planes varies from quite long planes with a large radius of curvature to right-angle-form and U-form structures. The increase of the annealing temperature to Tann = 1000 °C leads to a strong crystallization of the powder and a reduction of the amorphous phase.

Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalApplied Physics A: Materials Science and Processing
Volume80
Issue number1
DOIs
Publication statusPublished - Jan 2005
Externally publishedYes

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