Characterization of acid-treated carbon nanotube thin films by means of Raman spectroscopy and field-effect response
2009 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 476, no 4-6, 258-261 p.Article in journal (Refereed) Published
By combining Raman spectroscopy with transistor transfer characteristics, acid treatment of single-walled carbon nanotubes (SWCNTs) in a mixture of concentrated HNO3/H2SO4 has been characterized. The acid treatment results in a sharp decrease in the Raman resonant signals of the metallic SWCNTs but no observable change in those of the semiconducting SWCNTs. However, the acid treatment causes disappearing gate modulation of the thin-film transistors made of the SWCNTs, contrary to what would be expected referring to the Raman results. These experimental results suggest that the energy band of the semiconducting SWCNTs is significantly affected by absorbates induced by the acid treatment.
Place, publisher, year, edition, pages
2009. Vol. 476, no 4-6, 258-261 p.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-18586DOI: 10.1016/j.cplett.2009.06.041ISI: 000267762500029ScopusID: 2-s2.0-71849098131OAI: oai:DiVA.org:kth-18586DiVA: diva2:336633
QC 201005252010-08-052010-08-052016-05-02Bibliographically approved