Electronic and structural characterisation of polycrystalline platinum disulfide thin films
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2020Access:
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Kuanysh Zhussupbekov, Conor P. Cullen, Ainur Zhussupbekova, Igor V. Shvets, Georg S. Duesberg, Niall McEvoy, Cormac O ́ Coileain ́, Electronic and structural characterisation of polycrystalline platinum disulfide thin films, RSC Advances, 10, 2020, 42001 - 42007Download Item:
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Abstract:
We employ a combination of scanning tunnelling microscopy (STM) and scanning tunnelling spectroscopy (STS) to investigate the properties of layered PtS2, synthesised via thermally assisted conversion (TAC) of a metallic Pt thin film. STM measurements reveal the 1T crystal structure of PtS2, and the lattice constant is determined to be 3.58 ± 0.03 Å. STS allowed the electronic structure of individual PtS2 crystallites to be directly probed and a bandgap of ∼1.03 eV was determined for a 3.8 nm thick flake at liquid nitrogen temperature. These findings substantially expand understanding of the atomic and electronic structure of PtS2 and indicate that STM is a powerful tool capable of locally probing non-uniform polycrystalline films, such as those produced by TAC. Prior to STM/STS measurements the quality of synthesised TAC PtS2 was analysed by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. These results are of relevance to applications-focussed studies centred on PtS2 and may inform future efforts to optimise the synthesis conditions for thin film PtS2.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
SFI PI_12/IA/1264
European Commission
Queformal [829035]
Science Foundation Ireland (SFI)
PI_15/IA/3131
BMBF
NobleNEMS [16ES1121].
Irish Research Council (IRC)
IRCLA/2019/171
Science Foundation Ireland (SFI)
15/SIRG/3329
Science Foundation Ireland (SFI)
12/RC/2278_P2
Author's Homepage:
http://people.tcd.ie/zhussupahttp://people.tcd.ie/duesberg
http://people.tcd.ie/ivchvets
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RSC Advances10
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Nanoscience & Materials , NanotechnologyDOI:
http://dx.doi.org/10.1039/d0ra07405eSource URI:
https://pubs.rsc.org/az/content/articlehtml/2020/ra/d0ra07405eLicences: