Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Morphology-driven electrical and optical properties in graded
  hierarchical transparent conducting Al:ZnO   Graded Al-doped ZnO layers, constituted by a mesoporous forest like system
evolving into a compact transparent conductor, were synthesized by Pulsed Laser
Deposition with different morphology to study the correlation with functional
properties. Morphology was monitored by measuring the resulting surface
roughness and its effects on electrical conductivity (especially carrier
mobility, which significantly decreases with increasing roughness) allow to
discuss the limitations in conduction mechanisms. Significant changes in light
scattering capability due to variations in morphology are also investigated and
discussed to study the correlation between morphology and functional
properties.

13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph