Size control of catalytic nanoparticles by thermal treatment and its application to diameter control of single-walled carbon nanotubes
Size control of catalytic nanoparticles by thermal treatment and its application to diameter control of single-walled carbon nanotubes
复制标题
DOI：
10.1063/1.2433024
复制
发表时间：
2007-01-22
影响因子：
4
通讯作者：
Homma, Yoshikazu
中科院分区：
文献类型：
--
作者：
Jeong, Goo-Hwan;Suzuki, Satoru;Homma, Yoshikazu
作者们报道了通过热退火对催化纳米粒子进行尺寸控制，以实现单壁碳纳米管（SWNTs）的直径可控生长。他们发现，在氩气环境中于1000℃重复退火时，钴纳米粒子的尺寸逐渐减小。X射线光电子能谱和二次离子质谱的结果表明，热蒸发是导致尺寸减小的原因。利用这一现象进行单壁碳纳米管生长后，作者们发现，随着纳米粒子变小，直径分布更窄的更细的单壁碳纳米管得以生长。他们的研究结果提供了一种合理且直接的技术，用于制备具有理想尺寸和均匀性的催化剂，以实现单壁碳纳米管的直径可控生长。（c）2007美国物理学会
The authors report size control of catalytic nanoparticles by thermal annealing for diameter-controlled growth of single-walled carbon nanotubes (SWNTs). They found that Co nanoparticle-size gradually decreased through repetitive annealing at 1000 degrees C in Ar ambient. Results of x-ray photoelectron spectroscopy and secondary ion mass spectroscopy show that thermal evaporation is responsible for the decrease. After SWNT growth using this phenomenon, the authors found that thinner SWNTs with a narrower diameter distribution grew as the nanoparticles became smaller. Their results provide a rational and straightforward technique to prepare catalysts having a desirable size and uniformity toward diameter-controlled SWNT growth. (c) 2007 American Institute of Physics.