Medda, Samar Kumar and Mitra, M and De, S and Pal, S and De, Goutam (2005) Metal nano particle-doped coloured films on glass and polycarbonate substrates. Pramana--Journal of Physics, 65 (5, SI). pp. 931-936. ISSN 0304-4289

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Abstract

In a program on the development of metal (e.g. An, Ag, Cu and their alloy) nanoparticles in sol-gel derived films, attempts were made to synthesize different coloured coatings on glasses and plastics. The absorption position of surface plasmon resonance (SPR) band arising from the embedded metal nanoparticles was tailored by controlling the refractive index of the matrix for the development of different colours. Thus different coloured (pink to blue) coatings on ordinary sheet glasses were prepared by generating An nanoparticles in mixed SiO(2)-TiO(2) matrices having refractive index values ranging from about 1.41 to 1.93. In another development, in situ generation of Ag nanoparticles in the inorganic-organic hybrid host leads to the formation of different abrasion resistant coloured coatings (yellow to pink) on polycarbonate substrates after curing. As expected, the SPR peak of Ag or Au is gradually red-shifted due to the increase of refractive index of the coating matrices causing a systematic change of colour.

Item Type:	Article
Additional Information:	1st National Conference on Nanoscience and Technology, Pune, INDIA, MAR 07-08, 2005
Uncontrolled Keywords:	Au and Ag nanoparticles; Coloured coatings; Silica-titania; Silica-titania-epoxy composite films and nonlinear optical material
Subjects:	Processing Science
Divisions:	Sensor and Actuator
Depositing User:	Bula Ghosh
Date Deposited:	23 Feb 2012 12:32
Last Modified:	23 Feb 2012 12:32
URI:	http://cgcri.csircentral.net/id/eprint/1008

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