Self-assembled monolayers of silver nanoparticles firmly grafted on glass surfaces: Low Ag+ release for an efficient antibacterial activity

被引：125
|
作者：
Pallavicini, Piersandro [1 ]
Taglietti, Angelo [1 ]
Dacarro, Giacomo [1 ]
Diaz-Fernandez, Yuri Antonio [1 ]
Galli, Matteo [3 ]
Grisoli, Pietro [2 ]
Patrini, Maddalena [3 ]
De Magistris, Giorgio Santucci [1 ]
Zanoni, Robertino [4 ]
机构：
[1] Univ Pavia, Dipartimento Chim Gen, Lab Nanochim, I-27100 Pavia, Italy
[2] Univ Pavia, Dipartimento Farmacol Sperimentale & Applicata, I-27100 Pavia, Italy
[3] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy
[4] Univ Roma La Sapienza, Dipartimento Chim, I-00185 Rome, Italy
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2010年 / 350卷 / 01期
关键词：
Antibacterial surface; Silver nanoparticles; Self-assembled monolayer; COLLOIDAL SILVER; THIN-FILMS; IN-SITU; GOLD; MULTILAYERS; CHEMISTRY;
D O I：
10.1016/j.jcis.2010.06.019
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：
A two-step, easy synthetic strategy in solution has been optimized to prepare authentic monolayers of silver nanoparticles (NP) on MPTS-modified glass surfaces, that were investigated by AFM imaging and by quantitative silver determination techniques. NP in the monolayers remain firmly grafted (i.e. not released) when the surfaces are exposed to air, water or in the physiological conditions mimicked by phosphate saline buffer, as UV-Vis spectroscopy and AFM studies demonstrate. About 15% silver release as Ag+ ions has been found after 15 days when the surfaces are exposed to water. The released silver cations are responsible of an efficient local microbicidal activity against Escherichia coli and Staphylococcus aureus bacterial strains. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码：110 / 116
页数：7
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