Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diffusion-driven growth of nanowires by low-temperature molecular beam
  epitaxy   With ZnTe as an example, we use two different methods to unravel the
characteristics of the growth of nanowires by gold-catalyzed molecular beam
epitaxy at low temperature. In the first approach, CdTe insertions have been
used as markers, and the nanowires have been characterized by scanning
transmission electron microscopy, including geometrical phase analysis, and
energy dispersive electron spectrometry; the second approach uses scanning
electron microscopy and the statistics of the relationship between the length
of the tapered nanowires and their base diameter. Axial and radial growth are
quantified using a diffusion-limited model adapted to the growth conditions;
analytical expressions describe well the relationship between the NW length and
the total molecular flux (taking into account the orientation of the effusion
cells), and the catalyst-nanowire contact area. A long incubation time is
observed. This analysis allows us to assess the evolution of the diffusion
lengths on the substrate and along the nanowire sidewalls, as a function of
temperature and deviation from stoichiometric flux.

6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
2
The categories of this paper are: math