Photodegradation of PAMAM G5-stabilized aqueous suspensions of gold nanoparticles

被引：10

作者：

Giorgetti, Emilia ^{[1
,2
]}

Giusti, Anna ^{[3
,4
]}

Giammanco, Francesco ^{[5
]}

Laza, Simona ^{[5
]}

Del Rosso, Tommaso ^{[1
,2
]}

Dellepiane, Giovanna ^{[3
,4
]}

机构：

[1] INSTM, Florence, Italy

[2] Inst Complex Syst ISC CNR, Florence, Italy

[3] Univ Genoa, INSTM, Genoa, Italy

[4] Univ Genoa, Dept Chem & Ind Chem, Genoa, Italy

[5] Univ Pisa, Dept Phys, I-56100 Pisa, Italy

来源：

APPLIED SURFACE SCIENCE | 2007年 / 254卷 / 04期

关键词：

gold nanoparticles; dendrimer; photodegradation;

D O I：

10.1016/j.apsusc.2007.09.057

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Gold nanoparticles are produced in the form of colloidal suspensions in water by ps laser ablation of a metallic target. The fifth generation of ethylenediamine-core poly(amidoamine) (PAMAM G5) is used as a capping agent. Thanks to the ability of PAMAM to encapsulate and stabilize gold cations within its inner cavities, it is possible to evidence, by simple UV-visible spectroscopy, a photo-fragmentation process induced by the 532 nm radiation, which is resonant with the absorption plasmon band of gold nanoparticles. This effect, that can be also exploited to control the size and shape of gold nanoparticles obtained with different procedures, arises from electron photo-ejection and subsequent charging and disintegration of existing gold nanoparticles into smaller size products. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1140 / 1144

页数：5

共 9 条

[1] Synthesis of gold nanoparticles by laser ablation in toluene: Quenching and recovery of the surface plasmon absorption [J].