access icon free Stability of colloidal silver nanoparticles trapped in lipid bilayer: effect of lecithin concentration and applied temperature

The use of silver nanoparticle on various substrates has been widespread because of its good antibacterial properties that directly depend on the stability of the silver nanoparticles in a colloidal suspension. In this study, the colloidal solutions of the silver nanoparticles were synthesised by a simple and safe method by using lecithin as a stabilising agent and their stability was examined at various temperatures. The effect of the lecithin concentrations on the stability of the synthesised silver nanoparticles was examined from 25 to 80°C at 5°C intervals, by recording the changes in the UV–vis absorption spectra, the hydrodynamic diameter and the light scattering intensity of the silver nanoparticles. In addition, the morphology of the synthesised silver nanoparticles was investigated with the low-voltage scanning electron microscopy and transmission electron microscopy. The results indicated that increasing temperature caused different changes in the size of the stabilised and the unstabilised silver nanoparticles. The size of the stabilised silver nanoparticles reduced from 38 to 36 nm during increasing temperature, which confirmed good stability.

Inspec keywords: nanofabrication; suspensions; light scattering; nanoparticles; antibacterial activity; lipid bilayers; ultraviolet spectra; silver; biomedical materials; nanomedicine; visible spectra; scanning electron microscopy; colloids; transmission electron microscopy

Other keywords: low-voltage scanning electron microscopy; light scattering intensity; transmission electron microscopy; Ag; colloidal silver nanoparticle stability; lipid bilayer; lecithin concentration; applied temperature effect; hydrodynamic diameter; colloidal suspension; antibacterial properties; UV-vis absorption spectra; stabilising agent; nanoparticle morphology; temperature 25 degC to 80 degC

Subjects: Nanotechnology applications in biomedicine; Methods of nanofabrication and processing; Visible and ultraviolet spectra of metals, semimetals, and alloys; Biomedical materials; Optical properties of metals and metallic alloys (thin films, low-dimensional and nanoscale structures); Colloids; Natural and artificial biomembranes; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials

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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-nbt.2013.0048
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