2014 · 32 citations · 0 references
Natural SciencesChemistryMaterials ScienceMaterials ChemistryNanomaterialsNanotechnologyNanomaterial CharacterizationNanomaterials SynthesisNanoparticle CharacterizationNanoparticle StabilityNanoparticle SynthesisStarch ChemistryNanoparticle FormationNanoparticle Size AnalysisNanoparticle Size DistributionNanoparticle Size EffectsNanoparticlesPh DependenceSilver Nanoparticle SynthesisStarch Nanoparticles
Water soluble starch capped silver selenide nanoparticles have been successfully synthesized at room temperature using sodium borohydride as a reducing agent. The effects of pH and precursor concentration were investigated for their influence on the size and shape of the synthesized nanoparticles. Starch is composed of acid and alcohol groups which can easily be influenced by change in pH. The chemistry of starch as polymeric has potential to stabilize nanoparticles. The nanoparticles have been characterized using UVVis spectroscopy, FT-IR spectroscopy, TGA, TEM, SEM and XRD techniques. The obtained nanoparticles gave particles size distribution ranging from 1 to 23 nm in diameter for all conditions used. The size of nanoparticles was found to decrease with an increase in pH 6 to 11, while the increase in precursor concentration (1:1, 1:2 and 2:1 of AgNO3:Se) resulted in an increase in nanoparticle size.