We produced gold nanoparticles in water by picosecond laser ablation at 532 nm and 1064 rim. 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. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Production of colloidal gold nanoparticles by picosecond laser ablation in liquids
Marsili P;GIAMMANCO, FRANCESCO
2007-01-01
Abstract
We produced gold nanoparticles in water by picosecond laser ablation at 532 nm and 1064 rim. 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. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.File in questo prodotto:
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