The optical and morphological properties of the vacuum-evaporated silver (Ag) nanoparticulate films on softened polyvinyl alcohol (PVA) modified with the 3-mercaptopropyl trimethoxysilane (MPTMS) and 3-aminopropyl trimethoxysilane (APTMS) dopants are reported. The topography of the particulate films is characterized by the field-emission scanning electron microscopy. The optical spectra broadening, red-shift, and the increase in the intensity values of the plasmonic resonance peak with the nature of dopant have a strong dependence on the particle size, shape, and inter-particle separation. The conducted experimental optical studies are supported by Finite Difference Time-Domain (FDTD) simulation results. Quantitative analysis of the Fourier-Transform Infrared Spectroscopy (FTIR) and Raman Spectroscopy studies confirm the surface modification of Ag nanoparticulate films on doped PVA substrates. The amount of polymer-metal interaction caused by the strongly interacting silane groups of the dopants and their influence on the morphology and optical properties are discussed.
|Original language||English (US)|
|Journal||Journal of Materials Science: Materials in Electronics|
|State||Published - Jan 21 2021|
Bibliographical noteKAUST Repository Item: Exported on 2021-02-05
Acknowledgements: All authors are greatly indebted to their respective affiliated organizations for their enormous support and facilities. However, they thank Prof. Mohan Rao, Department of Physics, Manipal Institute of Technology, India for facilitating his lab for the experimental work prior to the formation of Nanomaterials and Polymer Physics laboratory, Laboratorio de Nanocompuestos, Departamento de Ingeniería de Materiales (DIMAT), Universidad de Concepción (UdeC), Chile, and Spintronics Materials and Application Lab (SMAL), Chungnam National University, South Korea for simulation works. This work was supported by the Manipal Academy of Higher Education (MIT-2017, 2020), Karnataka and also acknowledges the Fondecyt Project No 3200832, Programa Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT) de la Agencia Nacional de Investigación y Desarrollo, Chile.