Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimentally Probing 'Hydrophobic' Water at the Gold Electrode/Aqueous
  Interface   Quantitative description of reaction mechanisms in aqueous phase
electrochemistry requires experimental characterization of local water
structure at the electrode/aqueous interface and its evolution with changing
potential. Gaining such insight experimentally under electrochemical conditions
is a formidable task. Here we characterize the potential dependent structure of
a sub-population of interfacial water that have one OH group pointing towards a
gold working electrode using interface specific vibrational spectroscopy in a
thin film electrochemical cell. Such 'free-OH' groups are the molecular level
observable of an extended hydrophobic interface. This 'free-OH' interacts only
weakly with the Au surface at all potentials, has an orientational distribution
that narrows as one approaches the potential of zero charge and disappears on
the oxidation of the gold electrode.

27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess