Chirality Distributions for Semiconducting Single-Walled Carbon Nanotubes Determined by Photoluminescence Spectroscopy

Nanomaterials

Takahiro Yamamoto¹  Masaru Irita¹  Yoshikazu Homma¹ 

[1] Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan;

关键词: carbon nanotubes;    photoluminescence;    chemical vapor deposition;    synthesis;   

DOI  :  10.3390/nano11092309

来源: DOAJ

【 摘 要 】

To realize single-walled carbon nanotube (SWCNT) chiral selective growth, elucidating the mechanism of SWCNT chirality $(n,m)$ selectivity is important. For this purpose, an accurate evaluation method for evaluating the chirality distribution of grown SWCNTs without post-growth processing or liquid-dispersion of SWCNTs is indispensable. Here, we used photoluminescence spectroscopy to directly measure the chirality distributions of individual semiconducting SWCNTs suspended on a pillar-patterned substrate. The number of chirality-assigned SWCNTs was up to 332 and 17 chirality types with the chiral angles ranging from $0^{°}$ to ${28.05}^{°}$ were detected. The growth yield of SWCNTs was confirmed to primarily depends on the chiral angle in accordance with the screw dislocation model. Furthermore, when higher-yield chiralities are selected, the chiral angle distribution with a peak corresponding to near-armchair SWCNTs is well fitted with a model that incorporates the thermodynamic effect at the SWCNT-catalyst interface into the kink growth-based kinetic model. Our quantitative and statistical data provide new insights into SWCNT growth mechanism as well as experimental confirmation of theoretical predictions.

【 授权许可】

Unknown