Electrical transport properties of a carbon nanostructure obtained by plasma-enhanced chemical vapor deposition during thermal cycling

  • Alexey A. Maximenko Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus https://orcid.org/0000-0003-2660-8105
  • Erika Rajackaitė Institute of Materials Science, Kaunas University of Technology, 59 K. Baršausko Street, Kaunas LT-51423, Lithuania
  • Šarūnas Meškinis Institute of Materials Science, Kaunas University of Technology, 59 K. Baršausko Street, Kaunas LT-51423, Lithuania https://orcid.org/0000-0001-9622-7573
  • Tomas Tamulevičius Institute of Materials Science, Kaunas University of Technology, 59 K. Baršausko Street, Kaunas LT-51423, Lithuania
  • Sigitas Tamulevičius Institute of Materials Science, Kaunas University of Technology, 59 K. Baršausko Street, Kaunas LT-51423, Lithuania https://orcid.org/0000-0002-9965-2724
  • Andrei A. Kharchanka Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus; Belarusian State Pedagogical University named after Maxim Tank, 18 Savieckaja Street, Minsk 220030, Belarus https://orcid.org/0000-0002-7274-1380
  • Alexander K. Fedotov Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus https://orcid.org/0000-0002-7008-847X
  • Julia A. Fedotova Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus https://orcid.org/0000-0002-4471-0552
DOI: https://doi.org/10.33581/2520-2243-2020-3-89-96

Abstract

We have investigated the structure and electrical conductivity of carbon nanographite layers grown by chemical vapor deposition, enhanced by microwave plasma (PECVD) on an setup by IPLAS Innovative Plasma Systems GmbH (Germany). The samples were grown on fused silica substrates with deposition times of 20 and 40 min, respectively. The study of the formed layers of nanographite by the method of Raman light scattering and scanning electron microscopy showed that the surface of the nanographite sample deposited for 20 min is covered with a large number of unconnected vertical graphene nuclei with an average size of less than 10 nm. An increase in the growth time to 40 min led to an increase in the size of the nuclei to 20 –30 nm; however, their overlap does not occur. This confirmed that the samples corresponded to the initial stages of the formation of vertical graphene in the grown nanographite layers and there is no percolative structure in them. The obtained samples were used to study the temperature dependences of the sheet electrical resistance at direct current in the range of 4 –300 K and the effect on them of the number of cycles N cooling – heating (300 K – 2 K – 300 K) in an atmosphere of gaseous helium, as well as the change in the atmosphere storage of samples (by placing them in the air after warming up to room temperature). It was found that the electrical resistance of the sample deposited for 20 min is very sensitive to two technological parameters of measurement – the number of cycles N and the change in the storage atmosphere after heating. This manifested itself in the fact that after four cooling – heating cycles and one change of the atmosphere (helium – air – helium) after warming up, the resistance increased by more than 20 %, reaching saturation. The resistance of the sample, deposited for 40 min, showed less sensitivity during thermal cycling, increasing by no more than 10 %. The effect of thermal cycling we attribute to the rearrangement of defects formed at the boundaries of grains in the nanographite layer, and in the case of a change in the atmosphere, with the passivation of dangling bonds with atmospheric gases.

Author Biographies

Alexey A. Maximenko, Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus

PhD (physics and mathematics); senior researcher at the laboratory of physics of prospective materials

Erika Rajackaitė, Institute of Materials Science, Kaunas University of Technology, 59 K. Baršausko Street, Kaunas LT-51423, Lithuania

postgraduate student

Šarūnas Meškinis, Institute of Materials Science, Kaunas University of Technology, 59 K. Baršausko Street, Kaunas LT-51423, Lithuania

PhD (physics and mathematics); chief researcher and head of the research laboratory of vacuum and plasma processes

Tomas Tamulevičius, Institute of Materials Science, Kaunas University of Technology, 59 K. Baršausko Street, Kaunas LT-51423, Lithuania

PhD (physics and mathematics); chief researcher

Sigitas Tamulevičius, Institute of Materials Science, Kaunas University of Technology, 59 K. Baršausko Street, Kaunas LT-51423, Lithuania

doctor of science (physics and mathematics), full professor; director

Andrei A. Kharchanka, Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus; Belarusian State Pedagogical University named after Maxim Tank, 18 Savieckaja Street, Minsk 220030, Belarus

PhD (physics and mathematics); senior researcher at the laboratory of physics of prospective materials, Institute for Nuclear Problems, Belarusian State University; associate professor at the department of physics and methods of teaching physics, faculty of physics and mathematics, Belarusian State Pedagogical University named after Maxim Tank

Alexander K. Fedotov, Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus

doctor of science (physics and mathematics), full professor; chief researcher at the laboratory of physics of prospective materials

Julia A. Fedotova, Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus

doctor of science (physics and mathematics); deputy director on international collaboration and head of the laboratory of physics of prospective materials

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Published
2020-10-07
Keywords: carbon structures, vertical graphene, electrical resistance, thermal cycling, chemical vapor deposition (CVD)
Supporting Agencies The authors are grateful to I. A. Svito for carrying out electric transport measurements. This work was supported by the state program of scientific research of the Republic of Belarus «Photonics, opto- and microelectronics» (assignment 3.3.04) and the contract No. 08626319/20553435-74 with Joint Institute for Nuclear Research (Dubna, Russia).
How to Cite
Maximenko, A. A., Rajackaitė, E., Meškinis, Šarūnas, Tamulevičius, T., Tamulevičius, S., Kharchanka, A. A., Fedotov, A. K., & Fedotova, J. A. (2020). Electrical transport properties of a carbon nanostructure obtained by plasma-enhanced chemical vapor deposition during thermal cycling. Journal of the Belarusian State University. Physics, 3, 89-96. https://doi.org/10.33581/2520-2243-2020-3-89-96
Issue
No 3 (2020): Journal of the Belarusian State University. Physics
Section
Condensed State Physics

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