Electrical behaviour of discontinuous silver films deposited on softened polystyrene and poly (4-vinylpyridine) blends

Manjunatha Pattabi, Pratima Parashar, S. C. Gurumurthy

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Results of the studies carried out on the electrical behaviour of silver island films deposited on the blends of polystyrene (PS) and poly (4-vinylpyridine) (P4VP) are presented here. The substrates were held at 457 K, much above the glass transition temperature of both the polymers to ensure sufficient polymer fluidity during deposition, to obtain a sub-surface particulate film. A constant deposition rate of 0.4 nm/s was used throughout the study. Films on softened PS gives rise to a very high room temperature resistance approaching that of the substrate resistance due to the formation of a highly agglomerated structure. On the other hand, films on softened P4VP gives rise to a room temperature resistance in the range of a few tens to a few hundred MΩ/, which is desirable for device applications. The blends of PS and P4VP show room temperature resistances in the desirable range even at a PS/P4VP ratio of 75:25. The films show an increase in resistance when they are exposed to atmosphere. This is attributed to the oxidation of silver islands. The film resistances in the desired range could be obtained even after exposure to atmosphere up to a PS concentration of 50%.

Original languageEnglish
Pages (from-to)1182-1185
Number of pages4
JournalJournal of Materials Science: Materials in Electronics
Volume20
Issue number12
DOIs
Publication statusPublished - 2009

Fingerprint

Polystyrenes
Silver
polystyrene
silver
Polymers
room temperature
atmospheres
Fluidity
polymers
Substrates
Deposition rates
Temperature
glass transition temperature
particulates
poly(4-vinylpyridine)
Oxidation
oxidation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

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abstract = "Results of the studies carried out on the electrical behaviour of silver island films deposited on the blends of polystyrene (PS) and poly (4-vinylpyridine) (P4VP) are presented here. The substrates were held at 457 K, much above the glass transition temperature of both the polymers to ensure sufficient polymer fluidity during deposition, to obtain a sub-surface particulate film. A constant deposition rate of 0.4 nm/s was used throughout the study. Films on softened PS gives rise to a very high room temperature resistance approaching that of the substrate resistance due to the formation of a highly agglomerated structure. On the other hand, films on softened P4VP gives rise to a room temperature resistance in the range of a few tens to a few hundred MΩ/, which is desirable for device applications. The blends of PS and P4VP show room temperature resistances in the desirable range even at a PS/P4VP ratio of 75:25. The films show an increase in resistance when they are exposed to atmosphere. This is attributed to the oxidation of silver islands. The film resistances in the desired range could be obtained even after exposure to atmosphere up to a PS concentration of 50{\%}.",
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Electrical behaviour of discontinuous silver films deposited on softened polystyrene and poly (4-vinylpyridine) blends. / Pattabi, Manjunatha; Parashar, Pratima; Gurumurthy, S. C.

In: Journal of Materials Science: Materials in Electronics, Vol. 20, No. 12, 2009, p. 1182-1185.

Research output: Contribution to journalArticle

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