Issue 19, 2019

Radio frequency heating of metallic and semiconducting single-walled carbon nanotubes

Abstract

Here we report the effect of metallic (m-) and semiconducting (s-) properties of single-walled carbon nanotubes (SWCNTs) on the response of SWCNT films to radio frequency (RF) heating. We separated high-purity m- and s-SWCNTs from an initial SWCNTs mixture and prepared thin films using vacuum filtration method. The areal density of the films is 9.6 μg cm−2, and the DC conductivities are in the range of 7800–49 000 S m−1. We show rapid and non-contact Joule heating of films using a fringing-field RF applicator, and we observe maximum heating rates in the frequency range of 60–70 MHz. We determine that the more conductive m-SWCNT films reflect RF fields and heat at a maximum rate of 1.51 °C s−1 compared to maximum heating rate of 25.6 °C s−1 for s-SWCNT films. However, m-SWCNTs heat up faster than s-SWCNTs when dispersed in a dielectric medium. Our results confirm the non-monotonic relationship between RF heating rate and conductivity for CNT-based materials such that conductivity is required for heating but high values are correlated with reflections. Our findings also suggest that RF heating could be a possible metric for evaluating film purity because impurities in the films affect the conductivity and thus RF heating rate. We anticipate that RF heating may occur in SWCNT-based electronics and affect their performance.

Graphical abstract: Radio frequency heating of metallic and semiconducting single-walled carbon nanotubes

Supplementary files

Article information

Article type
Paper
Submitted
21 Feb 2019
Accepted
02 May 2019
First published
03 May 2019

Nanoscale, 2019,11, 9617-9625

Author version available

Radio frequency heating of metallic and semiconducting single-walled carbon nanotubes

M. Anas, Y. Zhao, M. A. Saed, K. J. Ziegler and M. J. Green, Nanoscale, 2019, 11, 9617 DOI: 10.1039/C9NR01600G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements