Ionic liquid-Assisted synthesis of silver mesoparticles as efficient surface enhanced Raman scattering substrates

D. Koukouzelis, A. Rozaria, N. Pontillo, S. Koutsoukos, E.A. Pavlatou, A. Detsi

Journal of Molecular Liquids (2020), 306, 112929

Surface-enhanced Raman Scattering (SERS) constitutes a powerful molecule detection and identification method. However, the design of a suitable substrate, which combines ease of use with reproducibility, remains a major problem. In this study, the use of silver mesoparticles (AgMPs) as SERS substrate was investigated. A green methodology was applied for the synthesis of the AgMPs, using the novel hydroxyethylammonium ascorbate ionic liquid as the reducing agent and chitosan as the stabilising and homogenising matrix. Experimental design was applied for the optimisation of the AgMPs' synthesis. Scanning electron microscopy (SEM) revealed the flower-shape morphology of the materials. The potential application of AgMPs as SERS using Rhodamine B as the model molecule and promising and reproducible results were obtained in concentrations even at 10−9 M. Dynamic light scattering and SEM confirmed the stability of the synthesised AgMPs over a period of 18 months.

doi: 10.1016/j.molliq.2020.112929

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