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In-situ Dose dependent Gamma ray Irradiated Synthesis of PMMA-Ag nanocomposites films for multifunctional applications

Abstract

We herein report a simple, one pot and rapid gamma-ray irradiation method for the fabrication of PMMA-Ag nanocomposite films for multifunctional applications. The PMMA-Ag composites were synthesised in-situ by dose-dependent gamma-ray irradiation followed by films preparation via compression moulding technique. The composition of the PMMA polymer and functional groups were determined using Fourier transform infrared spectroscopy (FT-IR) and Raman analysis while UV-vis spectroscopic and X-ray diffraction (XRD) analysis were used to identify the Surface Plasmon Resonance (SPR) bands and crystallinity of the nanocomposite respectively. Field emission scanning electron microscopy (FESEM) analysis showed that, the particle are spherical with average particle diameter of ~ 35 nm, ~45 nm, ~50 nm, ~65 nm, and ~75 nm as the irradiation dose increased from 2 - 6.5 h while the energy dispersive spectroscopy (EDS) confirms the presence of corresponding elements. Gel permeation chromatography data was used to determine the molecular weight while contact angle studies show the surface properties of the composites. Dielectric properties of the composites were found to increase with respect to increase in the radiation dose. All the as- synthesised films showed good antimicrobial activity against Gram-positive bacteria, Staphylococcus aureus (S. aureus) and Gram-negative bacteria, Escherichia coli (E. Coli). The fabricated PMMA-Ag substrate films allowed the detection of model probe molecule 4-mercaptobenzoic acid (MBA) up to concentration as low as 10-9 M while the Raman enhancement factor was found to be as high as ~104.

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Publication details

The article was received on 30 May 2018, accepted on 08 Aug 2018 and first published on 10 Aug 2018


Article type: Paper
DOI: 10.1039/C8NJ02684J
Citation: New J. Chem., 2018, Accepted Manuscript
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    In-situ Dose dependent Gamma ray Irradiated Synthesis of PMMA-Ag nanocomposites films for multifunctional applications

    B. K B, A. K. Nair, H. J. Maria, J. JOSE, A. Mayeen, K. M S, A. Saha, S. Thomas, O. S. Oluwafemi and N. Kalarikkal, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ02684J

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