期刊
ACS NANO
卷 7, 期 7, 页码 6156-6161出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn401995z
关键词
carbon nanotubes; ultralong; chemical vapor deposition; Schulz-Flory distribution; catalyst activity
类别
资金
- Foundation for the National Basic Research Program of China [2011CB932602, 2013CB934200]
- National Science Foundation of China [21203107]
The Schulz-Flory distribution is a mathematical function that describes the relative ratios of polymers of different length after a polymerization process, based on their relative probabilities of occurrence. Carbon nanotubes (CNTs) are big carbon molecules which have a very high length-to-diameter ratio, somewhat similar to polymer molecules. Large amounts of ultralong CNTs have not been obtained although they are highly desired. Here, we report that the Schulz-Flory distribution can be applied to describe the relative ratios of CNTs of different lengths produced with a floating chemical vapor deposition process, based on catalyst activity/deactivation probability. With the optimized processing parameters, we successfully synthesized 550-mm-long CNTs, for which the catalyst deactivation probability of a single growth step was ultralow. Our finding bridges the Schulz-Flory distribution and the synthesis of one-dimensional nanomaterials for the first time, and sheds new light on the rational design of process toward controlled production of nanotubes/nanowires.
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