Semiconductor Physics, Quantum Electronics & Optoelectronics, 28 (4), P. 449–455 (2025).
DOI: https://doi.org/10.15407/spqeo28.04.449
Synthesis and optical characterization of seed silver nanoparticles in situ coated with poly-(N-isopropylacrylamide)
M.M. Khutko1, A.M. Lopatynskyi1,2, V.K. Lytvyn1, P.V. Demydov1, V.I. Chegel1,2*
1V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41 Nauky Avenue, 03028 Kyiv, Ukraine
2Educational and Scientific Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska Street, 01601 Kyiv, Ukraine
*Corresponding author e-mail: chegelvi@outlook.com
Abstract. Due to their outstanding physicochemical properties, noble metal nanoparticles are widely exploited across multiple fields, including nanomedicine and sensors. In the nanostructure synthesis process, a stabilizing agent is usually introduced to prevent their aggregation. In this work, a poly-(N-isopropylacrylamide) (pNIPAM) thermosensitive polymer coating was synthesized in situ as a stabilizing layer during the formation of seed silver nanoparticles and characterized using UV-vis spectrophotometry and dynamic light scattering. The evolution of pNIPAM coating on the surface of seed silver nanoparticles was followed by studying the changes in the light extinction spectra of the nanoparticle solutions, caused by localized surface plasmon resonance and Rayleigh scattering. The sizes of the studied particles, determined by dynamic light scattering, indicate the formation of electrostatic chelate complexes of NIPAM or pNIPAM with silver ions or nanoparticles, which was confirmed by static and dynamic molecular mechanics (MMX) calculations in PCModel software.
Keywords: silver nanostructures, poly-(N-isopropylacrylamide), localized surface plasmon resonance, light scattering, chelate complexes, molecular mechanics calculations.
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