Adsorption of sulfur onto a surface of silver nanoparticles stabilized with sago starch biopolymer

Adsorption of sulfide ions onto a surface of starch capped silver nanoparticles upon addition of thioacetamide was investigated. UV–vis absorption spectroscopy revealed that the adsorption of the sulfide ion on the surface of the silver nanoparticles induced damping as well as blue shift of the silv...

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Bibliographic Details
Published in:Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2009-10, Vol.73 (1), p.30-35
Main Authors: Djoković, Vladimir, Krsmanović, Radenka, Božanić, Dušan K., McPherson, Michael, Van Tendeloo, Gustaaf, Nair, P. Sreekumari, Georges, Michael K., Radhakrishnan, Thottackad
Format: Article
Language:English
Subjects:
Adsorption
Biocomposite
Biopolymer
Biopolymers - chemistry
Core–shell nanoparticles
Microscopy, Electron, Transmission
Nanoparticles - chemistry
Nanoparticles - ultrastructure
Silver - chemistry
Silver nanoparticles
Spectrophotometry
Starch
Starch - chemistry
Sulfides - chemistry
Sulfur - chemistry
Surface Plasmon Resonance
Surface Properties
Thioacetamide - chemistry
X-Ray Diffraction
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Summary:Adsorption of sulfide ions onto a surface of starch capped silver nanoparticles upon addition of thioacetamide was investigated. UV–vis absorption spectroscopy revealed that the adsorption of the sulfide ion on the surface of the silver nanoparticles induced damping as well as blue shift of the silver surface plasmon resonance band. Further increase in thioacetamide concentration led to shift of the resonance band toward higher wavelengths indicating the formation of the continuous Ag 2S layer on the silver surface. Thus fabricated nanoparticles were investigated using electron microscopy techniques (TEM, HRTEM, and HAADF-STEM) and X-ray photoelectron spectroscopy (XPS), which confirmed their core–shell structure.
ISSN:0927-7765
1873-4367
DOI:10.1016/j.colsurfb.2009.04.022