Size Effects in the Heat Capacity of Modified MWCNTs | Sciact - CRIS-system of Boreskov Institute of Catalysis

Size Effects in the Heat Capacity of Modified MWCNTs Full article

Journal

Thermal Science and Engineering Progress
, E-ISSN: 2451-9049

Output data

Year: 2021, Volume: 26, Article number : 101097, Pages count : 6 DOI: 10.1016/j.tsep.2021.101097

Tags

Carbon nanotubes; MWCNTs; Heat capacity; Effects of dimensionality and size

Authors

Bagatskii M.I. ¹ , Jeżowski A. ² , Szewczyk D. ² , Sumarokov V.V. ¹ , Barabashko M.S. ^1,5 , Kuznetsov V.L. ^3,4 , Moseenkov S.I. ³ , Ponomarev A.N. ⁶

Affiliations

1	B. Verkin Institute for Low Temperature Physics and Engineering of NASU, 47 Nauky Ave., 61103 Kharkov, Ukraine
2	W. Trzebiatowski Institute of Low Temperature and Structure Research of Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw, Poland
3	Boreskov Institute of Catalysis, 5 Lavrentiev Ave., 630090 Novosibirsk, Russia
4	National Research Tomsk State University, 36 Lenin Ave., 634050 Tomsk, Russia
5	National Research Tomsk Polytechnic University, 30 Lenin Ave., 634050 Tomsk, Russia
6	Institute of Strength Physics and Materials Science of SB RAS, 2/4 Academicheskii Ave., 634055 Tomsk, Russia

Funding (3)

1	Ministry of Science and Higher Education of the Russian Federation	III.23.2.10 (221040800115-8)
2	Ministry of Science and Higher Education of the Russian Federation	ГЗ-2021-2023
3	National Research Foundation of Ukraine	197/02.2020

Carbon nanomaterials with unique physical and chemical properties find practical applications in various fields, such as in new composite materials, nanoelectronics, medicine, etc. The efficiency of using MWCNTs (multiwalled carbon nanotubes) depends on their morphology, structure, the presence of impurities and defects. In this work, the influence of defects and geometric sizes of CVD MWCNTs on their heat capacity was experimentally studied. The heat capacity of MWCNTs modified by grinding and oxidation with different average outer diameters (7.2 and 18 nm) was measured by the thermal relaxation method in the temperature range from 1.8 to 275 K. The effects of size and dimensionality were found. The character of the temperature dependences of the specific heat of ground and ground-oxidized MWCNTs with various diameters differs fundamentally below ≈140 K. The discovered effects are discussed.

Bagatskii M.I. , Jeżowski A. , Szewczyk D. , Sumarokov V.V. , Barabashko M.S. , Kuznetsov V.L. , Moseenkov S.I. , Ponomarev A.N.
Size Effects in the Heat Capacity of Modified MWCNTs
Thermal Science and Engineering Progress. 2021. V.26. 101097 :1-6. DOI: 10.1016/j.tsep.2021.101097 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Dec 23, 2020
Accepted:	Sep 28, 2021
Published online:	Oct 3, 2021
Published print:	Dec 1, 2021

Web of science:	WOS:000713392900001
Scopus:	2-s2.0-85122726180
Elibrary:	48127910
Chemical Abstracts:	2021:2313749
OpenAlex:	W3205773849

DB	Citing
Web of science	8
Elibrary	6
Scopus	11
OpenAlex	9