A simple Green Synthesis of Stable Silver Nanoparticles with Sargassum Alga and a New Colorimetric Sensor for Detection of Monosaccharides

In this work, a new cost-effective, rapid and simple method for the preparation of stable silver nanoparticles(AgNPs) was developed, which can be produced by oxidizing the reductants in crude extracted from Sargassum algawith AgNO3. Compared with the most used citrate-capped AgNPs, the as-prepared AgNPs showed high stability andgood biocompatibility. The as-prepared AgNPs could be further applied to colorimetric monosaccharides detection. Withthe increasing concentration of monosaccharides, the solution color turned from bright yellow to dark brown graduallyand a new absorption band around 600 nm appeared which indicating the aggregation of AgNPs. The absorbance at 600nm was found to be linearly dependent on the glucose, fructose and galactose concentrations in the range of 5-900 μM,1-500 μM and 1-300 μM with a limit of detection of 1 μM, 0.5 μM and 0.5 μM respectively. The proposed AgNPsshowed high selectivity toward monosaccharides determination in alkaline solution.

کلیدواژه ها:

Silver nanoparticle ، Monosaccharides ، Alga ، Colorimetric sensor ، Sargassum