Study of electrophysical properties of pure and intercalated highly oriented pyrolytic graphite
Z.A. Akhmatov1,2,3, F.Kh.. Khokonov2,3,4, I.N. Sergeev2
1 Kabardino-Balkarian State University named after H.M. Berbekov
2 Institute for Nuclear Research of the RAS
3 Kabardino-Balkar Scientific Center of the RAS
4 Adyghe State University
DOI: 10.26456/pcascnn/2025.17.007
Original article
Abstract: Graphite intercalated compounds have attracted significant attention from researchers due to their unique physical properties. Metals and molecules introduced into the interplanar spacing of graphite can act as donors or acceptors of electrons. This means that intercalation with different chemical elements can influence the carrier concentration in graphite. As a result, graphite intercalated compounds can exhibit different electronic, thermal and magnetic properties. In this work, the possibility of modifying the electrophysical properties of highly oriented pyrolytic graphite by intercalating it with potassium atoms is demonstrated. Intercalation of highly oriented pyrolytic graphite by potassium was performed using a two-zone method. The intercalation stage of the sample was determined from Raman spectra data. Measurements of the electrophysical properties of pure and intercalated graphite were carried out using the van der Pauw method (four-probe method). It has been shown that intercalation of highly oriented pyrolytic graphite by potassium leads to a decrease in its specific resistance and Hall constant, while there is a significant increase in the concentration and mobility of charge carriers. Considering that the change in the electrophysical properties of graphite during its intercalation occurs without the destruction of the crystalline structure, which leads to a deterioration in the physical characteristics, it can be said with confidence that this method is one of the most promising in modifying electronic, surface, and other properties of layered carbon materials.
Keywords: Highly oriented pyrolytic graphite, electrophysical properties, Hall constant, alkali metals, intercalation, two-zone method, Raman spectroscopy
- Zeitun A. Akhmatov – Ph. D., Senior Researcher of the Department of Theoretical and Experimental Physics, Kabardino-Balkarian State University named after H.M. Berbekov, Senior Researcher of the Laboratory of Astrophysics and Cosmic Ray Physics Institute for Nuclear Research of the RAS, Senior Researcher of the Institute of Informatics and Regional Management Problems Kabardino-Balkar Scientific Center of the RAS
- Azamat Kh.. Khokonov – Dr. Sc, Leading Researcher, Institute for Nuclear Research of the RAS, Senior Researcher of the Institute of Informatics and Regional Management Problems Kabardino-Balkar Scientific Center of the RAS, Leading Researcher Adyghe State University
- Igor N. Sergeev – Ph. D., Senior Researcher of the Laboratory of Astrophysics and Cosmic Ray Physics, Institute for Nuclear Research of the RAS
For citation:
Akhmatov Z.A., Khokonov F.Kh.., Sergeev I.N. Issledovanie elektrofizicheskikh svojstv chistogo i interkalirovannogo vysokoorientirovannogo piroliticheskogo grafita [Study of electrophysical properties of pure and intercalated highly oriented pyrolytic graphite], Fiziko-khimicheskie aspekty izucheniya klasterov, nanostruktur i nanomaterialov [Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials], 2025, issue 17, pp. 007-014. DOI: 10.26456/pcascnn/2025.17.007. ⎘
Full article (in Russian): download PDF file
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