Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Efficient Photocatalytic H2 Evolution: Controlled Dewetting-Dealloying
  to Fabricate Site-Selective High-activity Nanoporous Au Particles on Highly
  Ordered TiO2 Nanotube Arrays   Overlaid self-ordering processes: we form anodic self-organized TiO2
nanostumps and exploit them for self-ordering dewetting of Au-Ag sputtered
films. This forms ordered particle configurations at tube top (crown position)
or bottom (ground position). By dealloying we then form, from minimal amount of
noble metal, porous Au nanoparticles that when in crown position allow for a
drastically improved photocatalytic H2 production compared with nanoparticles
produced by conventional dewetting processes.

25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas