Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structural Alternation Correlated to the Conductivity Enhancement of
  PEDOT:PSS Films by Secondary Doping   "Secondary doping" in
poly(3,4-ethylenedioxy-thiophene):poly(styrenesulfonate) (PEDOT:PSS) is quite
effective and a frequently used method for the conductivity enhancement. This
simple approach, the addition of co-solvents to the PEDOT:PSS solution before
film fabrication, is an essential way to derive the high electrical performance
of PEDOT:PSS, but the mechanism still remains unclear. In this study, nanoscale
structural changes synchronized with the conductivity enhancement via secondary
doping in PEDOT:PSS films were investigated. During secondary doping with
ethylene glycol near the critical dopant concentration, non-crystalized PEDOT
molecules uncoupled from PSS chains and then underwent nano-crystallization.
These structural changes might be the key driving force for conductivity
enhancement via secondary doping.

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The categories of this paper are: econ
37
The categories of this paper are: supr-con
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The categories of this paper are: astro-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: math
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: chem-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph