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Production of colloidal gold nanoparticles by picosecond laser ablation in liquids
Author(s) -
Giorgetti E.,
Giusti A.,
Laza S. C.,
Marsili P.,
Giammanco F.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200675320
Subject(s) - laser ablation synthesis in solution , picosecond , nanoparticle , colloidal gold , materials science , laser ablation , ablation , absorption (acoustics) , dendrimer , colloid , saturation (graph theory) , laser , nanotechnology , optics , chemistry , x ray laser , polymer chemistry , laser power scaling , composite material , organic chemistry , physics , mathematics , engineering , combinatorics , aerospace engineering
We produced gold nanoparticles in water by picosecond laser ablation at 532 nm and 1064 nm. We used the amino‐terminated dendrimer PAMAM G5 as stabilizing agent. At 532 nm, the production process exhibits a threshold that is about 10 times lower than at 1064 nm and rapidly saturates. The fast saturation is due to single photon absorption of the ablating beam and a possible further energy loss due to photofragmentation of existing nanoparticles. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)