Journal
ACS OMEGA
Volume 7, Issue 1, Pages 629-637Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.1c05250
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Funding
- RUSA 2.0 (MHRD-India) grant, Policy (TNMulti-Gen), Department of Education, Government of India [F. 24-51/2014-U]
- Deanship of Scientific Research, King Khalid University, Abha, Suadi Arabia [RGP: 1/275/1442]
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In this study, MoS2/graphene heterostructure was successfully synthesized and characterized using various techniques, revealing improved photoluminescence and better luminescence contrast for fluorescence live-cell imaging applications compared to individual MoS2.
Here, we report the synthesis of MoS2/graphene heterostructure in single-stage, liquid-phase exfoliation using a 7:3 isopropyl alcohol/water mixture. Further, the synthesized heterostructure was characterized using UV-visible and micro-Raman spectroscopies, transmission electron microscopy (TEM), and dynamic light scattering (DLS) analysis. UV-visible and micro-Raman analyses confirmed that the synthesized heterostructure had mostly few-layered (two-to-four sheets) MoS2. The photophysical properties of the heterostructure were analyzed using steady-state and time-resolved luminescence techniques. Enhanced photoluminescence was observed in the case of the heterostructure probably due to an increase in the defect sites or reduction in the rate of nonradiative decay upon formation of the sandwiched heterostructure. Applications of this heterostructure for fluorescence live-cell imaging were carried out, and the heterostructure demonstrated a better luminescence contrast compared to its individual counterpart MoS2 in phosphate-buffered saline (PBS).
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