Decrease in thermal conductivity in polymeric P3HT nanowires by size-reduction induced by crystal orientation: New approaches towards thermal transport engineering of organic materials

Miguel Muñoz Rojo, Jaime Martín, Stéphane Grauby, Theodorian Borca-Tasciuc, Stefan Dilhaire, Marisol Martin-Gonzalez*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

41 Citations (Scopus)
3 Downloads (Pure)

Abstract

To date, there is no experimental characterization of thermal conductivity of semiconductor polymeric individual nanowires embedded in a matrix. This work reports on scanning thermal microscopy measurements in a 3ω configuration to determine how the thermal conductivity of individual nanowires made of a model conjugated polymer (P3HT) is modified when decreasing their diameters. We observe a reduction of thermal conductivity, from λNW = 2.29 ± 0.15 W K-1 m-1 to λNW = 0.5 ± 0.24 W K-1 m-1, when the diameter of nanowires is reduced from 350 nm to 120 nm, which correlates with the polymer crystal orientation measured by WAXS. Through this work, the foundations for future polymer thermal transport engineering are presented.

Original languageEnglish
Pages (from-to)7858-7865
Number of pages8
JournalNanoscale
Volume6
Issue number14
DOIs
Publication statusPublished - 21 Jul 2014
Externally publishedYes

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