@article{, author = {Zhussupbekov, Kuanysh; Cullen, Conor P.; Zhussupbekova, Ainur; Shvets, Igor; Duesberg, Georg; McEvoy, Niall; Ó Coileáin, Cormac}, title = {Electronic and structural characterisation of polycrystalline platinum disulfide thin films}, editor = {}, booktitle = {}, series = {}, journal = {RSC Advances}, address = {}, publisher = {}, edition = {}, year = {2020}, isbn = {}, volume = {2020}, number = {10}, pages = {42001-42007}, url = {https://doi.org/10.1039/D0RA07405E }, doi = {10.1039/D0RA07405E}, keywords = {}, 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.}, note = {}, institution = {Universität der Bundeswehr München, Fakultät für Elektrotechnik und Informationstechnik, EIT 2 - Institut für Physik, Professur: Düsberg, Georg}, }