CHITOSAN-COATED BIMETALLIC GOLD-SILVER NANOPARTICLES: SYNTHESIS, CHARACTERIZATION AND SERS ACTIVITY

A.-M. HADA; M. POTARA; S. SUARASAN; A. VULPOI; S. ASTILEAN

doi:10.24193/subbphys.2017.01

Authors

A.-M. HADA Department of Biomolecular Physics, Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu Str. 1, 400084 Cluj-Napoca, Romania; Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, T. Laurian Str. 42, 400271 Cluj-Napoca, Romaniaalexandru.hada@ubbcluj.ro
M. POTARA Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, T. Laurian Str. 42, 400271 Cluj-Napoca, Romania. monica.potara@phys.ubbcluj.ro https://orcid.org/0000-0003-4901-2400
S. SUARASAN Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, T. Laurian Str. 42, 400271 Cluj-Napoca, Romania. sorina.suarasan@ubbcluj.ro https://orcid.org/0000-0002-3387-480X
A. VULPOI Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, T. Laurian 42, 400271, Cluj-Napoca, Romania. adriana.vulpoi@ubbcluj.ro https://orcid.org/0000-0001-5334-4980
S. ASTILEAN Department of Biomolecular Physics, Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu Str. 1, 400084 Cluj-Napoca, Romania; Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, T. Laurian Str. 42, 400271 Cluj-Napoca, Romania. simion.astilean@phys.ubbcluj.ro https://orcid.org/0000-0002-9975-5651

DOI:

https://doi.org/10.24193/subbphys.2017.01

Keywords:

chitosan; plasmonic nanoparticles; localized surface plasmon resonance; surface-enhanced Raman spectroscopy; transmission electronic microscopy; zeta potential

Abstract

In this study we report a fast and non-toxic approach for the synthesis of bimetallic gold-silver spherical nanoparticles coated with chitosan biopolymer. The obtained hybrid nanoparticles were characterized by UV-vis-NIR extinction spectroscopy, transmission electron microscopy (TEM) and zeta potential measurements. In view of future applicability in molecular sensing, we tested the feasibility of chitosan protected bimetallic nanoparticles to operate as surface-enhanced Raman scattering substrates.

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