Lu Jennifer, Yi Sung Soo, Kopley Thomas, Qian Cheng, Liu Jie, Gulari Erdogan
Agilent Laboratories, 3500 Deer Creek Road, Palo Alto, California 94304, USA.
J Phys Chem B. 2006 Apr 6;110(13):6655-60. doi: 10.1021/jp057085g.
We report the use of the block copolymer micelle approach to produce various transition metal nanoparticles such as iron, cobalt, and nickel with precisely controlled size and spacing. These uniformly sized catalyst nanoparticles derived from the block copolymer micelle approach have enabled the synthesis of carbon nanotubes (CNTs) with narrow size distribution. Because of the excellent film forming ability of the polymeric material, metal-bearing surface micelles produced from the solution micelles can be distributed uniformly on a surface, resulting in evenly dispersed catalyst nanoparticles. As a result, high quality and uniformly distributed CNTs have been synthesized. Spatially selective growth of CNTs from a lithographically patterned metal-bearing micelle film has been achieved. The polymer template approach can potentially be extended to synthesize single-metallic and bimetallic catalytically active nanoparticles with uniform size and spacing and is fully compatible with conventional lithographic process. Additionally, catalyst nanoparticles produced from this method do not coalesce at high growth temperature. All these attributes make this approach a promising fabrication pathway for controllable synthesis of CNTs.
我们报道了使用嵌段共聚物胶束方法来制备各种过渡金属纳米颗粒，如铁、钴和镍，其尺寸和间距得到精确控制。这些源自嵌段共聚物胶束方法的尺寸均匀的催化剂纳米颗粒使得能够合成尺寸分布窄的碳纳米管（CNT）。由于聚合物材料具有优异的成膜能力，由溶液胶束产生的含金属表面胶束可以均匀地分布在表面上，从而导致催化剂纳米颗粒均匀分散。结果，合成了高质量且分布均匀的碳纳米管。已经实现了从光刻图案化的含金属胶束膜进行碳纳米管的空间选择性生长。聚合物模板方法有可能扩展到合成具有均匀尺寸和间距的单金属和双金属催化活性纳米颗粒，并且与传统光刻工艺完全兼容。此外，通过这种方法生产的催化剂纳米颗粒在高生长温度下不会聚结。所有这些特性使得这种方法成为可控合成碳纳米管的一种有前途的制造途径。
