Abstract
Adsorption of small Te clusters on tellurene and \(MoS_{2}\) monolayers have been studied within density functional framework. With adsorption on 2D monolayers, Te clusters show distortion in cluster geometry along with local distortions in the monolayer. Adsorption energy is found to be higher in \(Te_{n}\$tellurene\) as compared to \(Te_{n}\$MoS_{2}\), suggesting that there exists a strong interaction between Te clusters and tellurene substrate. Adsorption of clusters on monolayers results in the modification of the effective band gap of these monolayers. Analysis of the charge density difference profile shows that a certain amount of charge is transferred from the clusters to the substrates. This results in the redistribution of the charge. Our optical calculations for the interband transitions show that Te cluster creates quantum states inside of monolayers, which leads to increasing optical absorption of the system. Additional low-intensity absorption peak, in addition to the main peak, has been noticed in cluster-adsorbed \(MoS_{2}\) monolayer for E \(\parallel \) C. The real part of the dielectric function reveals the existence of plasmon frequencies. We conclude that the cluster adsorption on different monolayers alters the electronic and dielectric properties of monolayers.
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Acknowledgements
The authors gratefully acknowledge UGC for providing the computational HPC facility in the Department of Physics, HPU Summer Hill, Shimla.
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In the manuscript preparation, all authors have contributed significantly. Tamanna Sharma has carried out the work. She was involved with conceptualization, software application, data curation, data analysis, validation, investigation, and manuscript preparation. Sheetal Sharma has taken care of data analysis and manuscript preparation. Munish Sharma was involved in conceptualization, data analysis, and curation. Raman Sharma was involved in supervision, conceptualization, formal analysis, project administration, and acquiring resources.
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Sharma, T., Sharma, S., Sharma, M. et al. Adsorption of Te clusters on tellurene and \(MoS_{2}\) monolayers: structural, electronic, and optical properties. J Nanopart Res 26, 75 (2024). https://doi.org/10.1007/s11051-024-05968-7
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DOI: https://doi.org/10.1007/s11051-024-05968-7