Silver organosol: synthesis, characterization and localized surface plasmon resonance study

Nath, Sudip, Ghosh, Sujit Kumar, Praharaj, Snigdhamayee, Panigrahi, Sudipa, Basu, Soumen and Pal, Tarasankar (2005) Silver organosol: synthesis, characterization and localized surface plasmon resonance study. New Journal of Chemistry, 29 12: 1527-1534. doi:10.1039/b508730a

Author Nath, Sudip
Ghosh, Sujit Kumar
Praharaj, Snigdhamayee
Panigrahi, Sudipa
Basu, Soumen
Pal, Tarasankar
Title Silver organosol: synthesis, characterization and localized surface plasmon resonance study
Journal name New Journal of Chemistry   Check publisher's open access policy
ISSN 1144-0546
Publication date 2005
Sub-type Article (original research)
DOI 10.1039/b508730a
Open Access Status Not Open Access
Volume 29
Issue 12
Start page 1527
End page 1534
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Abstract In this article a simple and reproducible technique for the synthesis of a silver organosol is reported from a specific silver precursor, solid silver acetate. Molten hexadecylamine acts as a solvent for silver acetate and imparts stability to the evolved nanoparticles. The amine-capped organosol shows unique stability as neither agglomeration nor oxidation takes place over one year. The synthesised silver particles have been characterised by UV-visible, TEM, XRD, XPS, FTIR and thermogravimetric studies. The hexadecylamine-stabilised silver organosol was employed to examine the altered optical properties in different solvent systems and with different ligands by accounting for the changes in the localised surface plasmon resonance (LSPR) spectrum. It was observed that the position of the surface plasmon band of silver nanoparticles is greatly affected by the solvents and ligands under consideration. The quantitative alteration of the LSPR spectrum involving encapsulated nanoparticles in a dielectric ligand shell has been rationalised from Mie theory. It has also been shown that cationic and anionic surfactants of different chain lengths induce changes in the optical properties of silver nanoparticles whereas, zwitterionic amino acid molecules reflect insignificant changes in the LSPR spectrum. The max of the LSPR gradually shifts to red with the increase in chain length of both the cationic and anionic surfactants, indicating specific binding of the surfactant molecules around silver nanoparticles. Finally the affinity of the synthesised silver nanoparticles for amine molecules has been accounted for by taking the HSAB principle into consideration.
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Australian Institute for Bioengineering and Nanotechnology Publications
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Created: Fri, 15 Jan 2010, 11:45:12 EST by Ms Lynette Adams on behalf of Aust Institute for Bioengineering & Nanotechnology