Synthesis and characterization of nanostructured graphene-doped selenium.

Autor: Yadav SK; Department of Physics, Banaras Hindu University Varanasi 221005 India dr_neeraj_mehta@yahoo.co.in., Kumar A; Department of Physics, Banaras Hindu University Varanasi 221005 India dr_neeraj_mehta@yahoo.co.in.; Sunbeam College for Women Bhagwanpur Varanasi 221005 India., Mehta N; Department of Physics, Banaras Hindu University Varanasi 221005 India dr_neeraj_mehta@yahoo.co.in.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2023 May 03; Vol. 13 (20), pp. 13564-13574. Date of Electronic Publication: 2023 May 03 (Print Publication: 2023).
DOI: 10.1039/d3ra01199b
Abstrakt: In this work, we explore various properties of elemental selenium glass (g-Se) by doping with graphene through the facile melt-quench technique. The structural information of the synthesized sample was found by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and Raman spectroscopy. The analyses confirm that the graphene-doped g-Se behaves like a glass-ceramic material. Electrical and dielectric measurements were performed to discover the consequences of graphene incorporation on the nano-structure of g-Se. The electrical measurements of the dielectric parameters ( i.e. , dielectric constant ε ' and loss ε '') and conductivity ( σ ac ) reveal that graphene incorporation causes a rise in the dielectric constant but simultaneously increases dielectric loss. The enhancement in ε ' and ε '' values is thought to be a consequence of the interface effect between graphene and the host selenium glass. Calorimetric experiments were performed in a standard differential scanning calorimetry (DSC) unit on the glassy nanocomposite in non-isothermal mode. By measuring the kinetic temperatures at four heating rates, the kinetics of the crystallization/glass transition were studied. The results were examined to understand the role of graphene doping on the well-known phase transitions ( i.e. , glass transition and crystallization) of g-Se.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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