Bulk Surfaces Coated with Triangular Silver Nanoplates: Antibacterial Action Based on Silver Release and Photo-Thermal Effect.
Bulk Surfaces Coated with Triangular Silver Nanoplates: Antibacterial Action Based on Silver Release and Photo-Thermal Effect.
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DOI：
10.3390/nano7010007
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发表时间：
2017-01-06
期刊：
影响因子：
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通讯作者：
Grisoli P
中科院分区：
文献类型：
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作者：
D'Agostino A;Taglietti A;Desando R;Bini M;Patrini M;Dacarro G;Cucca L;Pallavicini P;Grisoli P
一层特别合成的具有所需的局部表面等离子体共振（LSPR）特征的银纳米板被接枝在氨基功能化的大块玻璃表面上，以赋予双重抗菌作用：(i)基于Ag+释放的众所周知的长期抗菌作用；（ii）一种“随需应变”的行动，可以利用银纳米物体的光热特性来启动。用波长落在所谓的近红外区域“治疗窗口”的激光照射这些样品，可以在几分钟的时间尺度内增强银纳米粒子的经典抗菌效果。我们演示了如何使用这两种行动允许几乎完全消除两种具有代表性的革兰氏阳性和革兰氏阴性细菌菌株的种群。
A layer of silver nanoplates, specifically synthesized with the desired localized surface plasmon resonance (LSPR) features, was grafted on amino-functionalized bulk glass surfaces to impart a double antibacterial action: (i) the well-known, long-term antibacterial effect based on the release of Ag+; (ii) an “on demand” action which can be switched on by the use of photo-thermal properties of silver nano-objects. Irradiation of these samples with a laser having a wavelength falling into the so called “therapeutic window” of the near infrared region allows the reinforcement, in the timescale of minutes, of the classical antibacterial effect of silver nanoparticles. We demonstrate how using the two actions allows for almost complete elimination of the population of two bacterial strains of representative Gram-positive and Gram-negative bacteria.