Dimerization-Initiated Preferential Formation of Coronene-Based Graphene Nanoribbons in Carbon Nanotubes

被引：83

作者：

Fujihara, Miho ^{[1
,2
]}

Miyata, Yasumitsu ^{[1
,2
]}

Kitaura, Ryo ^{[1
,2
]}

Nishimura, Yoshifumi ^{[1
,2
]}

Camacho, Cristopher ^{[1
,2
]}

Irle, Stephan ^{[1
,2
]}

Iizumi, Yoko ^{[3
]}

Okazaki, Toshiya ^{[3
]}

Shinohara, Hisanori ^{[1
,2
]}

机构：

[1] Nagoya Univ, Dept Chem, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[2] Inst Adv Res, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[3] Natl Inst Adv Ind Sci & Technol, Nanotube Res Ctr, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 28期

基金：

日本学术振兴会;

关键词：

POLYCYCLIC AROMATIC-HYDROCARBONS; RAMAN-SPECTRUM; BASIS-SETS; FREQUENCIES; GRAPHITE; SYMMETRY; STATE; SIZE;

D O I：

10.1021/jp3037268

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated the growth mechanism of coronene-derived graphene nanoribbons (GNRs) using two different precursors: coronene and a dimer form of coronene, so-called dicoronylene (C48H20). For both of the precursors, the formation of nanoribbon-like materials inside carbon nanotubes (CNTs) was confirmed by transmission electron microscope observations. Experimental and theoretical Raman analysis reveals that the samples also encapsulated dicoronylene and linearly condensed other coronene oligomers, which can be regarded as analogues to GNRs. Interestingly, it was found that the present doping condition of coronene yields dicoronylene prior to encapsulation due to the thermal dimerization of coronene. These results indicate that the dimerization before the encapsulation drives the preferential formation of the coronene-based GNRs within CNTs.

引用

页码：15141 / 15145

页数：5

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