Raman and fluorescence spectroscopic studies of a DNA-dispersed double-walled carbon nanotube solution

Jin Hee Kim, Masakazu Kataoka, Daisuke Shimamoto, Hiroyuki Muramatsu, Yong Chae Jung, Takuya Hayashi, Yoong Ahm Kim, Morinobu Endo, Jin Sung Park, Riichiro Saito, Mauricio Terrones, Mildred S. Dresselhaus

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We performed resonant Raman/fluorescence spectroscopic studies on double-walled carbon nanotubes (DWNTs) that were dispersed in an aqueous single stranded DNA solution. The luminescence signals from the inner tubes of DWNTs are intensified in the isolated state of each individual DWNT. The completely depressed radial breathing modes (RBMs) associated with the outer tubes (whether semiconducting or metallic) via the mechanical wrapping and the strong charge transfer between DNA and the outer tubes support our interpretation that the bright luminescence and sharp absorption spectra come from only the inner tubes, and not from isolated SWNTs. The circumferentially wrapped DNA on the outer tubes of individually isolated DWNTs in an aqueous solution gives rise to strong charge transfer to the semiconducting and metallic outer tubes as well as to generating physical strain in the outer tubes.

Original languageEnglish (US)
Pages (from-to)1060-1066
Number of pages7
JournalACS nano
Volume4
Issue number2
DOIs
StatePublished - Feb 23 2010

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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