Abstract
We explore the localized surface plasmon resonance (LSPR) behavior of aqueous sols of PVA-stabilized AgNPs synthesized in presence of glucose as a reducing agent. The in situ synthesis parameters are tuned by adding increasing amounts of NaOH, which causes interesting variations in pH, LSPR curve broadening, and the evolution of AgNPs embedded PVA cross-linked nanostructures. Small angle X-ray scattering (SAXS) analysis is used to investigate sol aggregate characteristics. In all samples, mass fractal aggregates of two radius of gyration are formed. Assuming spherical form, the SAXS nanoparticle size distribution predicts a range from 6 to 60 nm. However, only the fractal aggregate features closely correspond to the observed LSPR characteristics.
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Acknowledgments
MS acknowledges the financial support received from UGC, New Delhi in the form of SRF. Authors are grateful to Professor A.S.K. Sinha (Department of Chemical Engineering) for the use of instrumental facilities. Authors thank Dr. G. Malkondiah Director, DMRL, Hyderabad for permitting us to use SAXS facility. The authors also acknowledge the help received from Mr. M. Premkumar and Ms. Banumathy, DMRL, Hyderabad for their help in carrying out SAXS measurements. IS and RKM acknowledge AICTE, New Delhi for financial support received under RPS scheme. TEM images were recorded at Electron microscope facility MME Division IIT Kanpur for which help received from Professor Gouthama is gratefully acknowledged.
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Singh, M., Sinha, I., Singh, A.K. et al. Correlating SAXS analysis with LSPR behavior: poly(vinyl alcohol)-stabilized Ag nanoparticles. J Nanopart Res 13, 4387–4394 (2011). https://doi.org/10.1007/s11051-011-0388-x
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DOI: https://doi.org/10.1007/s11051-011-0388-x