Dendrimer-capped nanoparticles prepared by picosecond laser ablation in liquid environment.
Fifth generation ethylendiamine-core poly(amidoamine) (PAMAM G5) is presented as an efficient capping agent for the preparation of metal and semiconductor nanoparticles by ps laser ablation in water. In particular, we describe results obtained with the fundamental, second and third harmonic of a ps Nd:YAG laser and the influence of laser wavelength and pulse energy on gold particle production and subsequent photofragmentation. In this framework, the role of the dendrimer and, in particular, its interactions with gold clusters and cations are accounted.
INSTM and Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Firenze, Italy. emilia.giorgetti@fi.isc.cnr.it
Emilia
E
Giorgetti
Anna
A
Giusti
Francesco
F
Giammanco
Paolo
P
Marsili
Simona
S
Laza
D019187:Cadmium Compounds / Q000737:chemistry; D050091:Dendrimers / Q000737:chemistry* / Q000528:radiation effects*; D006046:Gold; D007834:Lasers; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D010316:Particle Size; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D012997:Solvents / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors
D019187:Cadmium Compounds; D050091:Dendrimers; D018036:Selenium Compounds; D012997:Solvents; D006046:Gold; C058667:cadmium selenide