Research Article

Nano Research

, Volume 2, Issue 11, pp 903-910

Open Access This content is freely available online to anyone, anywhere at any time.

Direct observation of the strong interaction between carbon nanotubes and quartz substrate

  • Lei DingAffiliated withDepartment of Chemistry, Duke University
  • , Weiwei ZhouAffiliated withDepartment of Chemistry, Duke University
  • , Thomas P. McNicholasAffiliated withDepartment of Chemistry, Duke University
  • , Jinyong WangAffiliated withBeijing National Laboratory for Molecular Sciences, Key Laboratory for the Physics and Chemistry of Nanodevices, National Laboratory of Rare Earth Material Chemistry and Application, College of Chemistry and Molecular Engineering, Peking University
  • , Haibin ChuAffiliated withBeijing National Laboratory for Molecular Sciences, Key Laboratory for the Physics and Chemistry of Nanodevices, National Laboratory of Rare Earth Material Chemistry and Application, College of Chemistry and Molecular Engineering, Peking University
  • , Yan LiAffiliated withBeijing National Laboratory for Molecular Sciences, Key Laboratory for the Physics and Chemistry of Nanodevices, National Laboratory of Rare Earth Material Chemistry and Application, College of Chemistry and Molecular Engineering, Peking University
  • , Jie LiuAffiliated withDepartment of Chemistry, Duke University Email author 

Abstract

We present a chemical vapor deposition (CVD) method for the growth of uniform single-walled carbon nanotube (SWNT) arrays on a stable temperature (ST)-cut single crystal quartz substrate using a mixture of methanol and ethanol as carbon source. It is found that introducing methanol during the growth can improve the density and the length of the well-aligned SWNTs in the arrays as well as increase the SWNT/quartz interaction. Obvious “up-shifts” of G-band frequencies in the Raman spectra have been found for the aligned SWNTs. A welldesigned control experiment shows that the G-band “up-shifts” originate from the strong interaction between SWNTs and the quartz substrate. It is believed that exploring this interaction will help to elucidate the growth mechanism; ultimately, this will help realize the promise of controlling the chirality of SWNTs.

Keywords

Single-walled carbon nanotube quartz wafer Raman spectroscopy G-band “up-shift” chemical vapor deposition (CVD)