Modulating the electronic properties along carbon nanotubes via tube-substrate interaction

Jaqueline S. Soares, Ana Paula M. Barboza, Paulo T. Araujo, Newton M. Barbosa Neto, Denise Nakabayashi, Nitzan Shadmi, Tohar S. Yarden, Ariel Ismach, Noam Geblinger, Ernesto Joselevich, Cecilia Vilani, Luiz G. Cançado, Lukas Novotny, Gene Dresselhaus, Mildred S. Dresselhaus, Bernardo R.A. Neves, Mario S.C. Mazzoni, Ado Jorio*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We study single wall carbon nanotubes (SWNTs) deposited on quartz. Their Raman spectrum depends on the tube-substrate morphology, and in some cases, it shows that the same SWNT-on-quartz system exhibits a mixture of semiconductor and metal behavior, depending on the orientation between the tube and the substrate. We also address the problem using electric force microscopy and ab initio calculations, both showing that the electronic properties along a single SWNT are being modulated via tube-substrate interaction.

Original languageEnglish
Pages (from-to)5043-5048
Number of pages6
JournalNano Letters
Issue number12
StatePublished - 8 Dec 2010
Externally publishedYes


  • Carbon nanotubes
  • Raman spectroscopy
  • electric force microscopy
  • quartz
  • tube-substrate interaction


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