Preparation and characterization of silver particulate structure deposited on softened poly(4-vinylpyridine) substrates

K. Mohan Rao, Manjunatha Pattabi, S. R. Sainkar, Arun Lobo, S. K. Kulkarni, Jayasheela Uchil, M. S. Murali Sastry

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Results of the investigations carried out on particulate silver films, deposited at a rate of 0.4 nm s-1 on poly(4-vinylpyridine) coated substrates held at temperatures in the range 440-490 K in a vacuum of 8×10-6 Torr are reported in this paper. A morphological study by scanning electron microscopy and x-ray diffraction was further confirmed by optical absorption studies. The shift in the plasmon resonance towards longer wavelength is ascribed to polymer-metal particle interactions. Electrical resistances immediately after deposition and at room temperature show a regular dependence on the thickness for the films in the temperature range studied. The films deposited at lower substrate temperatures show a lower negative temperature coefficient of resistance when compared to films deposited at higher substrate temperatures. X-ray photoelectron spectroscopy studies indicate the formation of a sub-surface particulate structure at higher substrate temperatures.

Original languageEnglish
Pages (from-to)2327-2336
Number of pages10
JournalJournal of Physics D: Applied Physics
Issue number18
Publication statusPublished - 21 Sep 1999
Externally publishedYes

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