Premium
Chemical vapor deposition growth and characterization of drop‐like MoS 2 /MoO 2 granular films
Author(s) -
Hao Song,
Yang Bingchu,
Gao Yongli
Publication year - 2017
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201600245
Subject(s) - kelvin probe force microscope , raman spectroscopy , monolayer , photoemission electron microscopy , chemical vapor deposition , materials science , scanning electron microscope , photoluminescence , thin film , analytical chemistry (journal) , nanotechnology , photoemission spectroscopy , semiconductor , drop (telecommunication) , x ray photoelectron spectroscopy , chemistry , chemical engineering , electron microscope , optoelectronics , optics , atomic force microscopy , composite material , telecommunications , physics , engineering , chromatography , computer science
Monolayer MoS 2 is an emerging two‐dimensional semiconductor with wide‐ranging potential applications in novel optoelectronic devices and catalysis. Here, we report the growth of drop‐like monolayer MoS 2 /MoO 2 granular films on SiO 2 /Si substrate by chemical vapor deposition method. The as‐synthesized films were systematically characterized by various means of optical microscopy, X‐ray/ultraviolet photoemission spectroscopy, scanning electron microscopy, atomic/kelvin force microscopy, X‐ray diffraction, Raman and photoluminescence techniques. The combined results of atomic force microscopy and scanning electron microscopy clearly present novel drop‐like granulars and domain boundaries, ascribed to lower growth temperature. X‐ray photoemission spectroscopy results complemented by Raman and X‐ray diffraction results confirm the formation of MoS 2 /MoO 2 granular films. The ultraviolet photoemission spectroscopy, along with kelvin force microscopy, reveals a different nature of surface potential of drop‐like MoS 2 granular films compared with crystalline MoS 2 , owing to electron transfer from MoS 2 to MoO 2 and drop‐like structure. Our study broadens the scope of two‐dimensional transition metal dichalcogenides research and reveals the distinct physical properties of drop‐like monolayer MoS 2 granular films.