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Lattice strain effects on the optical properties of MoS2 nanosheets

Year: 2014
Type: article
Abstract: "Strain engineering" in functional materials has been widely explored to tailor the physical properties of electronic materials and improve their electrical and/or optical properties. Here, we exploit both in plane and out of plane uniaxial tensile strains in MoS2 to modulate its band gap and engineer its optical properties. We utilize X-ray diffraction and cross-sectional transmission electron microscopy to quantify the strains in the as-synthesized MoS2 nanosheets and apply measured shifts of Raman-active modes to confirm lattice strain modification of both the out-of-plane and in-plane phonon vibrations of the MoS2 nanosheets. The induced band gap evolution due to in-plane and out-of-plane tensile stresses is validated by photoluminescence (PL) measurements, promising a potential route for unprecedented manipulation of the physical, electrical and optical properties of MoS2.
Authors: Lei Yang, Xudong Cui, Jingyu Zhang, Kan Wang, Meng Shen, Shuangshuang Zeng, Shadi A. Dayeh, Liang Feng, Bin Xiang
Institutions: University of Science and Technology of China, Laser Fusion Research Center, Lawrence Berkeley National Laboratory, Molecular Foundry, University of California San Diego, University at Buffalo, State University of New York
Language: English
Open Access status: gold
Estimated APC paid: $2,690
OpenAlex ID: W2088776954
FWCI: 11.48
Cites: 44
Cited by: 422
Related to: 10