Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Controlled fabrication of single-walled carbon nanotube electrodes by
  electron-beam-induced oxidation   The fabrication of metallic single-walled carbon nanotube electrodes
separated by gaps of typically 20nm width by electron-beam-induced oxidation is
studied within an active device configuration. The tube conductance is measured
continuously during the process. The experiment provides a statistical
evaluation of gap sizes as well as the electron dose needed for gap formation.
Also, the ability to precisely cut many carbon nanotubes in parallel is
demonstrated.

0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph