@article{Ding2009, 
author = {Lei Ding and Weiwei Zhou and Thomas P. McNicholas and Jinyong Wang and Haibin Chu and Yan Li and Jie Liu},
title = {Direct Observation of the Strong Interaction Between Carbon Nanotubes and Quartz Substrate},
year = {2009},
journal = {Nano Research},
volume = {2},
number = {11},
pages = {903-910},
keywords = {Single-walled carbon nanotube, quartz wafer, Raman spectroscopy, G-band "up-shift", chemical vapor deposition (CVD)},
url = {https://www.sciopen.com/article/10.1007/s12274-009-9093-9},
doi = {10.1007/s12274-009-9093-9},
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 well-designed 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.}
}