title: A New 2H-2H'/1T Cophase in Polycrystalline MoS2and MoSe2Thin Films.
abstract: We report on 2H-2H'/1T phase conversion of MoS2and MoSe2polycrystalline films grown by thermally assisted conversion. The structural conversion of the transition metal dichalcogenides was successfully carried out by organolithium treatment on chip. As a result we obtained a new 2H-2H'/1T cophase system of the TMDs thin films which was verified by Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The conversion was successfully carried out on selected areas yielding a lateral heterostructure between the pristine 2H phase and the 2H'/1T cophase regions. Scanning electron microscopy and atomic force microscopy revealed changes in the surface morphology and work function of the cophase system in comparison to the pristine films, with a surprisingly sharp lateral interface region.
authors: Department of Chemistry, Quaid-i-Azam University , 45320 Islamabad, Pakistan.
authors: Mehwish
authors: M
authors: Naz
authors: Toby
authors: T
authors: Hallam
authors: Nina C
authors: NC
authors: Berner
authors: Niall
authors: N
authors: McEvoy
authors: Riley
authors: R
authors: Gatensby
authors: John B
authors: JB
authors: McManus
authors: Department of Chemistry, Quaid-i-Azam University , 45320 Islamabad, Pakistan.
authors: Zareen
authors: Z
authors: Akhter
authors: Georg S
authors: GS
authors: Duesberg
keywords: 2D materials; butyl lithium; heterostructure; molybdenum disulfide; polytype; transition metal dichalcogenides