Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Physisorption of molecular oxygen on single-wall carbon nanotube bundles
  and graphite   We present a study on the kinetics of oxygen adsorption and desorption from
single-wall carbon nanotube (SWNT) and highly oriented pyrolytic graphite
(HOPG) samples. Thermal desorption spectra for SWNT samples show a broad
desorption feature peaked at 62 K which is shifted to significantly higher
temperature than the low-coverage desorption feature on HOPG. The low-coverage
O2 binding energy on SWNT bundles, 18.5 kJ/mol, is 55% higher than that for
adsorption on HOPG, 12.0 kJ/mol. In combination with molecular mechanics
calculations we show that the observed binding energies for both systems can be
attributed to van der Waals interactions, i.e. physisorption. The experiments
provide no evidence for a more strongly bound chemisorbed species or for
dissociative oxygen adsorption.

12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg