Dear Sir. Concerning your issue about the calculation of the number of layers in nano sheets of the exfoliated MoS2 from it's UV ViS spectra . I think the following below links and the attached files may help you in your analysis:

http://shodhganga.inflibnet.ac.in/bitstream/10603/151841/10/10_chapter%203.pdf https://arxiv.org/ftp/arxiv/papers/1803/1803.02240.pdf

https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.7b04873?src=recsys&journalCode=ascecg

Thanks

Thank you Sir ... I will go through these papers.