Related Experiment Video
Updated: Dec 22, 2025

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
Published on: November 28, 2017
Effect of Ultraviolet Irradiation on Photo-Physical and Surface Electronic Properties of MoS₂
Vijendra Kumar1, R K Shukla1, Jyoti Shakya2
1Department of Physics, University of Lucknow, 226007, Uttar Pradesh, India.
Abstract:
In this study, exfoliation of molybdenum disulfide (MoS₂) using the chemical exfoliation method was successfully achieved via probe sonication followed by centrifugation. The observed ultravioletvisible (UV-Vis) spectra of the MoS₂ dispersions indicated the presence of a few layers of MoS₂. The morphological, structural, optical and surface electronic properties before and after UV light irradiation were investigated by the technique of X-ray diffraction, the Raman spectroscopic measurements, transmission electron microscopy (TEM), and the scanning Kelvin probe microscopy (SKPM). It was observed that after UV irradiation, the Fermi level moves towards the valence band.
More Related Videos
Related Concept Videos
UV–Vis Spectroscopy: Molecular Electronic Transitions
Characteristics of MOSFET
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
Cycloaddition Reactions: MO Requirements for Photochemical Activation
MOSFET: Enhancement Mode
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
Mutations
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...

