Thermal analysis for laser selective removal of metallic single-walled carbon nanotubes

Jizhou Song*, Yuhang Li, Frank Du, Xu Xie, Yonggang Huang, John A. Rogers

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Single-walled carbon nanotubes (SWNTs) have been envisioned as one of the best candidates for future semiconductors due to their excellent electrical properties and ample applications. However, SWNTs grow as mixture of both metallic and semiconducting tubes and this heterogeneity hampers their practical applications. Laser radiation shows promises to remove metallic SWNTs (m-SWNTs) in air under an appropriate condition. We established a scaling law, validated by finite element simulations, for the temperature rise of m-SWNTs under a pulsed laser with a Gaussian spot. It is shown that the maximum normalized m-SWNT temperature rise only depends on two non-dimensional parameters: the normalized pulse duration time and the normalized interfacial thermal resistance. In addition, the maximum temperature rise is inversely proportional to the square of spot size and proportional to the incident laser power. These results are very helpful to understand the underlying physics associated with the removal process and provides easily interpretable guidelines for further optimizations.

Original languageEnglish (US)
Article number165102
JournalJournal of Applied Physics
Volume117
Issue number16
DOIs
StatePublished - Apr 28 2015

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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