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- Title
On-line monitoring of Au nanoparticles formation by optical spectroscopy.
- Authors
Salvati, R.; Longo, A.; Carotenuto, G.; Nicolais, L.; De Nicola, S.; Pepe, G. P.
- Abstract
Experimental results concerning the synthesis of gold nanoparticles prepared by alcoholic reduction of Au(III) ions in presence of a polymeric stabilizer, and UV-visible spectroscopic characterization is presented. Optical spectroscopic data have been correlated tooff-linesize measurements obtained analysing transmission electron micrographs. The gold cluster size, coming from both TEM micrographs and absorbance cubic root, behaved linearly with time above a threshold temperature (70C) according to a deposition-controlled growth mechanism. The plasmon peak halfwidth behaved linearly with inverse particle radius (obtained by TEM), thus proving the hypothesized mechanism growth. The spectroscopic approach allows anon-linegold cluster measurement with possibility to fine control particle size also in the case of a fast process.
- Subjects
GOLD; NANOPARTICLES; POLYMERS; PLASMONS (Physics); PARTICLES; ALCOHOL
- Publication
European Physical Journal B: Condensed Matter, 2004, Vol 41, Issue 1, p43
- ISSN
1434-6028
- Publication type
Article
- DOI
10.1140/epjb/e2004-00291-9