Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universal map of gas-dependent kinetic selectivity in carbon nanotube
  growth   Single-walled carbon nanotubes have been a candidate for outperforming
silicon in ultrascaled transistors, but the realization of nanotube-based
integrated circuits requires dense arrays of purely semiconducting species.
Control over kinetics and thermodynamics in tube-catalyst systems plays a key
role for direct growth of such nanotube arrays, and further progress requires
the comprehensive understanding of seemingly contradictory reports on the
growth kinetics. Here, we propose a universal kinetic model and provide its
quantitative verification by ethanol-based isotope labeling experiments. While
the removal of carbon from catalysts dominates the growth kinetics under a low
supply of precursors, our kinetic model and experiments demonstrate that
chirality-dependent growth rates emerge when sufficient amounts of carbon and
etching agents are co-supplied. As the model can be extended to create kinetic
maps as a function of gas compositions, our findings resolve discrepancies in
literature and offer rational strategies for chirality selective growth for
practical applications.

11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph