Type

Journal Article

Authors

Hongzhou Zhang
Niall Mc Evoy
Valeria Nicolosi

Subjects

Physics

Topics
raman spectra low frequency lattice disorders shear mode linear chain model suppression transmission electron microscopy red shift

Suppression of the Shear Raman Mode in Defective Bilayer MoS2 (2019)

Abstract We investigate the effects of lattice disorders on the low frequency Raman spectra of bilayer MoS 2. The bilayer MoS 2 was subjected to defect engineering by irradiation with a 30 keV He + ion beam, and the induced morphology change was characterized by transmission electron microscopy. When increasing the ion dose, the shear mode is observed to red-shift, and it is also suppressed sharply compared to other Raman peaks. We use the linear chain model to describe the changes to the Raman spectra. Our observations suggest that the crystallite size and orientation are the dominant factors behind the changes to the Raman spectra.
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Full list of authors on original publication

Hongzhou Zhang, Niall Mc Evoy, Valeria Nicolosi

Experts in our system

1
Hongzhou Zhang
Trinity College Dublin
Total Publications: 50
 
2
Niall Mc Evoy
Trinity College Dublin
Total Publications: 20
 
3
Valeria Nicolosi
Trinity College Dublin
Total Publications: 67