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Effect of deep UV laser treatment on electroless silver precipitation in supported poly-3,4-ethylenedioxythiophene layers♣

M. ILIEVA1, A. STOYANOVA1, V. TSAKOVA1, N. K. VUCHKOV2,* , K. A. TEMELKOV2, W. ERFURTH3, N. V. SABOTINOV2

Affiliation

  1. Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
  2. Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria
  3. Max-Planck-Institut für Mikrostrukturphysik, Halle, Germany

Abstract

Poly-3,4-ethylenedioxytiophene (PEDOT) polymer layers are electrodeposited on Pt substrates and irradiated with deep ultraviolet light. The 248.6 nm line of a UV Cu + laser is used. UV-treated and non-treated PEDOT samples are used for electroless silver precipitation carried out in a Ag-EDTA plating solution. The electroless metal deposition is studied as a function of the initial oxidation state of the polymer layers. A massive precipitation of metallic silver nanoparticles (10-40 nm) is observed in the case of reduced PEDOT. A larger amount of silver and a highly homogeneous distribution over the entire visible surface are found on the UV laser treated samples. The electroless precipitation in non-treated, oxidised PEDOT is sluggish and results in a non-uniform precipitation of Ag agglomerates (100-200 nm). The use of UV laser treated PEDOT layers in the oxidised state provokes a marked increase in the number of deposited Ag agglomerates and a uniform distribution over the polymer surface..

Keywords

PEDOT, UV laser treatment, Electroless silver precipitation, Nanoparticles.

Submitted at: Nov. 5, 2008
Accepted at: Oct. 3, 2009

Citation

M. ILIEVA, A. STOYANOVA, V. TSAKOVA, N. K. VUCHKOV, K. A. TEMELKOV, W. ERFURTH, N. V. SABOTINOV, Effect of deep UV laser treatment on electroless silver precipitation in supported poly-3,4-ethylenedioxythiophene layers♣, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 10, pp. 1444-1447 (2009)