2020/01/29 by Shubham Bhagat, Shivani Sharma, Bhagat, Shubham +5
Chemistry · Materials Science · Physics and Astronomy · #2D Materials and Applications #Absorption (acoustics) #Analytical Chemistry (journal) #Blueshift #Chemistry #Composite material #Diffraction #FOS: Physical sciences #Graphene research and applications #MXene and MAX Phase Materials #Materials science #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Optics #Optics (physics.optics) #Optoelectronics #Photoluminescence #Raman spectroscopy #Red shift #Strain (injury) #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.48550/arxiv.2001.11126
arxiv created 2020/01/29 · openalex publication_date 2020/01/29 · arxiv updated 2020/01/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The sensitive correlation between optical parameters and strain in MoS2 results in a totally different approach to tune the optical properties. Usually, an external source of strain is employed to monitor the optical and vibrational properties of a material. It is always challenging to have a precise control over the strain and its consequences on material properties. Here, we report the presence of a compressive strain in MoS2 crystalline powder and nanosheets obtained via the process of ball-milling and probe sonication. The diffraction peaks in the X-ray diffraction pattern shift to higher 2θ value implying a compressive strain that increases with the processing time. The absorption spectra, photoluminescence and Raman modes are blue-shifted w.r.t the bulk unprocessed sample. The observed blue-shift is attributed to the presence of compressive strain in the samples. Whereas in thin nano-sheets of MoS2, it is very likely that both quantum confinement as well as strain result in the observed blue-shift. These results indicate that by optimizing the processing conditions and/or time, a strain of desired amount and hence tunable shift in optical properties of material can be achieved.