Effect of Sulfobutylether-β-CD on Silver Nanoparticles Synthesis and Stability in aqueous solution

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An innovative application of sulfobutylether-β-CD (SBE-βCD) regarding the preparation of spherical and monodispersed silver nanoparticles (AgNPs) was recently described [1].

The synthesis of the AgNPs in SBE-βCD aqueous solution was successfully performed without using NaBH4 as reducing agent as demonstrated by Scanning Electron Microscopy (SEM-EDX) and UV-vis spectroscopy. The AgNPs properties, such as mean size and surface charge were determined by dynamic light scattering and zeta potential measurements.

The effect of SBE-βCD on the AgNPs stability was observed by following the gradual disappearing of the surface plasmonic band around 400 nm in the UV spectrum due to the dissolution of the nanoparticles by oxidation according to the Fenton-like reaction.

Our results showed that SBE-βCD molecules tend to be located around the AgNPs acting as stabilizers and hampering their aggregation in aqueous solution. In the light of our work, it is possible to consider that SBE-βCD might improve the actibacterial properties of the investigated nanoparticles.

[1] Guido Angelini, Carla Gasbarri “Green synthesis and properties of silver nanoparticles in sulfobutylether-β-cyclodextrin aqueous solution” Colloids and Surfaces A: Physicochemical and Engineering Aspects 2022, 633, 127924. Available online 17 November 2021.


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