Optical characterization of single-walled carbon nanotubes synthesized by catalytic decomposition of alcohol
Optical characterization of single-walled carbon nanotubes synthesized by catalytic decomposition of alcohol
复制标题
醇催化分解合成单壁碳纳米管的光学表征
DOI：
10.1088/1367-2630/5/1/149
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发表时间：
2003
影响因子：
3.3
通讯作者：
S. Chiashi
中科院分区：
文献类型：
--
作者：
S. Maruyama;Y. Miyauchi;Y. Murakami;S. Chiashi
通过共振拉曼散射、光吸收和近红外荧光等光学光谱测量，将通过酒精催化分解（酒精 CVD 方法，ACCVD）合成的单壁碳纳米管 (SWNT) 与高压 CO (HiPco) SWNT 样品进行比较。通过 ACCVD 方法，SWNT 可以在沸石催化剂载体颗粒上合成，也可以直接在石英基底表面合成；在后一种情况下，采用简单的浸涂技术来安装金属催化剂。使用 SEM 和 TEM 展示了在沸石载体上生成的生长 SWNT 的具体形态特征，表明通过该方法生产的 SWNT 具有几乎不含无定形碳或金属颗粒杂质的显着品质。通过拉曼散射和光吸收的结果对单壁碳纳米管的质量和直径分布进行了研究和讨论。在沸石颗粒上生长的单壁碳纳米管的平均直径比 HiPco 单壁碳纳米管的平均直径稍小。最后，测量表面活性剂水悬浮液中分离的单壁碳纳米管的不同激发波长的荧光发射光谱，以确定单壁碳纳米管的结构（n，m）分布。与 HiPco SWNT 相比，在沸石上生长的 ACCVD SWNT 具有更窄的手性分布。
Single-walled carbon nanotubes (SWNTs), synthesized by a catalytic decomposition of alcohol (alcohol CVD method, ACCVD), are compared with high-pressure CO (HiPco) SWNT samples through optical spectroscopic measurements such as resonant Raman scattering, optical absorption and near infrared fluorescence. By the ACCVD method, SWNTs were synthesized either on zeolite catalyst-support particles or directly on the surface of a quartz substrate; in the latter case, a simple dip-coat technique was employed for mounting the metal catalyst. Specific morphological characteristics of as-grown SWNTs generated on zeolite support are presented using SEM and TEM, revealing that the SWNTs produced by the proposed method possess the significant quality of being almost free from amorphous carbons or metal particle impurities. The quality and diameter distribution of SWNTs were investigated and discussed through the results of Raman scattering and optical absorption. The average diameter was slightly smaller for SWNTs grown on zeolite particles than for HiPco SWNTs. Finally, fluorescent emission spectra from isolated SWNTs in an aqueous surfactant suspension were measured for various excitation wavelengths to determine the structural (n,m) distribution of the SWNTs. The narrower chirality distribution for ACCVD SWNTs grown on zeolite compared with HiPco SWNTs was demonstrated.
影响因子：
3.3
作者：
A. Cassell;J. Raymakers;J. Kong;H. Dai
通讯作者：
A. Cassell;J. Raymakers;J. Kong;H. Dai
影响因子：
56.9
作者：
Rao, AM;Richter, E;Dresselhaus, MS
通讯作者：
Dresselhaus, MS