On the Possible Nature of Armchair-Zigzag Structure Formation and Heat Capacity Decrease in MWCNTs

On the Possible Nature of Armchair-Zigzag Structure Formation and Heat Capacity Decrease in MWCNTs

Structural disorder and temperature behavior of specific heat in multi walled carbon nanotubes (MWCNTs) have been investigated. The results of X-ray diffractometry, Raman spectroscopy, and transmission electron microscopy (TEM) images are analyzed. The thermodynamic theory of the zigzag-armchair dom...

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Bibliographic Details
Main Authors: Alexander Ponomarev, Valeriy Egorushkin, Nadezhda Bobenko, Maksym Barabashko, Anastasiya Rezvanova, Anna Belosludtseva
Format: Article
Language:English
Published: MDPI AG 2022-01-01
Series:Materials
Subjects:
structural disorder
carbon nanotubes
domain structure
heat capacity
phonons
size effect
Online Access:https://www.mdpi.com/1996-1944/15/2/518
Description
Summary:Structural disorder and temperature behavior of specific heat in multi walled carbon nanotubes (MWCNTs) have been investigated. The results of X-ray diffractometry, Raman spectroscopy, and transmission electron microscopy (TEM) images are analyzed. The thermodynamic theory of the zigzag-armchair domain structure formation during nanotube synthesis is developed. The influence of structural disorder on the temperature behavior of specific heat is investigated. The size of domains was estimated at ~40 nm. A decrease in heat capacity is due to this size effect. The revealed dependence of the heat capacity of MWCNTs on the structural disorder allows control over thermal properties of nanotubes and can be useful for the development of thermoelectric, thermal interface materials and nanofluids based on them.
ISSN:1996-1944

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