Open AccessReinforcement of CVD grown multi-walled carbon nanotubes by high temperature annealing
Author(s) -
Karina Elumeeva,
V. L. Kuznetsov,
A.V. Ischenko,
Rita Smajda,
Massimo Spina,
Lászlø Forró,
Arnaud Magrez
Publication year - 2013
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4829272
Subject(s) - carbon nanotube , materials science , chemical vapor deposition , mechanical properties of carbon nanotubes , annealing (glass) , composite material , modulus , microstructure , silicon nitride , silicon , young's modulus , tube furnace , optical properties of carbon nanotubes , elastic modulus , nanotechnology , nanotube , chemical engineering , optoelectronics , engineering , layer (electronics)
We report on the increase of the Young's modulus (E) of chemical vapor deposition (CVD) grown multi-walled carbon nanotubes (MWNTs) upon high temperature heat treatment. The post heat-treatment at 2200–2800ºC in a controlled atmosphere results in a considerable improvement of the microstructure, chemical stability and electro-physical properties of the nanotubes. The Young's modulus of MWNTs of different diameters was measured by the deflection of a single tube suspended across the hole of silicon nitride membrane and loaded by an atomic force microscope tip. Contrary to previous reports, a strong increase of E was feasible due to the improved growth conditions of pristine carbon nanotubes and to the improved heat treatment conditions. However, the elastic modulus of CVD grown MWNTs still shows strong diameter dependence resulting from the remaining structural inhomogeneities in large diameter nanotubes