Effect of chemical treatment on the thermoelectric properties of single walled carbon nanotube networks

Mingxing Piao, Mina Rastegar Alam, Gyu-Tae Kim, Urszula Dettlaff-Weglikowska, Siegmar Roth

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Carbon nanotube networks showing superior electric properties, high chemical stability, strong mechanical properties, and flexibility are also known to exhibit thermoelectric effects. However, the experimental thermoelectric figure of merit, ZT, of pristine carbon nanotubes is typically in the range of 10-3-10-2, which is still not attractive for thermal energy conversion applications. In this work, we show possible ways to improve the thermoelectric properties of single walled carbon nanotubes (SWCNTs) by means of chemical treatments. In this study, we primarily investigated the effect of chemical treatment on the electrical conductivity and thermoelectric power (TEP) of the entangled network of nanotubes, also, known as "buckypaper". This chemical treatment increased the electrical conductivity due to p-type doping, thereby, showing a decrease in the TEP given by the Seebeck coefficient, whereas the n-type dopants changed the sign and value of the TEP from about 40 to -40μVK-1. Neutral polymers, in terms of doping, such as PVDF, PMMA, PVA, PS, and PC, were expected to hinder phonon transport through the nanotube network, increasing the Seebeck coefficient up to ca. 50μVK-1. Our results reveal the importance of chemical doping determining the sign and the magnitude of the TEP, and role of the polymer matrix in the development of more effective thermoelectric composites based on carbon nanotubes.

Original languageEnglish
Pages (from-to)2353-2356
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume249
Issue number12
DOIs
Publication statusPublished - 2012 Dec 1

Fingerprint

Thermoelectric power
Single-walled carbon nanotubes (SWCN)
Carbon Nanotubes
carbon nanotubes
Doping (additives)
Carbon nanotubes
Seebeck coefficient
Seebeck effect
Nanotubes
nanotubes
Thermoelectricity
electrical resistivity
Chemical stability
polymers
energy conversion
Polymethyl Methacrylate
Thermal energy
Polymer matrix
Energy conversion
thermal energy

Keywords

  • Chemical treatment
  • Electrical conductivity
  • Seebeck coefficient
  • SWCNTs network

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Effect of chemical treatment on the thermoelectric properties of single walled carbon nanotube networks. / Piao, Mingxing; Alam, Mina Rastegar; Kim, Gyu-Tae; Dettlaff-Weglikowska, Urszula; Roth, Siegmar.

In: Physica Status Solidi (B) Basic Research, Vol. 249, No. 12, 01.12.2012, p. 2353-2356.

Research output: Contribution to journalArticle

Piao, Mingxing ; Alam, Mina Rastegar ; Kim, Gyu-Tae ; Dettlaff-Weglikowska, Urszula ; Roth, Siegmar. / Effect of chemical treatment on the thermoelectric properties of single walled carbon nanotube networks. In: Physica Status Solidi (B) Basic Research. 2012 ; Vol. 249, No. 12. pp. 2353-2356.
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