期刊
ACS APPLIED MATERIALS & INTERFACES
卷 3, 期 4, 页码 936-940出版社
AMER CHEMICAL SOC
DOI: 10.1021/am101290v
关键词
carbon nanofibers; nanoparticles; nickel; chemical vapor deposition; catalyst; ligand
资金
- North Carolina State University
- National Science Foundation [CBET-0967559]
- Materials Sciences and Engineering Division, Office of Basic Energy Sciences, U.S. Department of Energy
- Ministry of National Education, Republic of Turkey
- GAANN
Vertically aligned carbon nanofibers (VACNFs) were synthesized using ligand-stabilized Ni nanoparticle (NP) catalysts and plasma-enhanced chemical vapor deposition. Using chemically synthesized Ni NPs enables facile preparation of VACNF arrays with monodisperse diameters below the size limit of thin film lithography. During pregrowth heating, the ligands catalytically convert into graphitic shells that prevent the catalyst NPs from agglomerating and coalescing, resulting in a monodisperse VACNF size distribution. In comparison, significant agglomeration occurs when the ligands are removed before VACNF growth, giving a broad distribution of VACNF sizes. The ligand shells are also promising for patterning the NPs and synthesizing complex VACNF arrays.
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