Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chemical bonding in carbide MXene nanosheets   The chemical bonding in the carbide core and the surface chemistry in a new
group of transition-metal carbides Tin+1Cn-Tx (n=1,2) called MXenes have been
investigated by surface-sensitive valence band X-ray photoelectron
spectroscopy. Changes in band structures of stacked nano sheets of different
thicknesses are analyzed in connection to known hybridization regions of TiC
and TiO2 that affect elastic and transport properties. By employing high
excitation energy, the photoelectron cross-section for the C 2s - Ti 3d
hybridization region at the bottom of the valence band is enhanced. As shown in
this work, the O 2p and F 2p bands are shown to strongly depend both on the
bond lengths to the surface groups and the adsorption sites. The effect of
surface oxidation and Ar+ sputtering on the electronic structure is also
discussed.

16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th