D'Agostino Agnese, Taglietti Angelo, Desando Roberto, Bini Marcella, Patrini Maddalena, Dacarro Giacomo, Cucca Lucia, Pallavicini Piersandro, Grisoli Pietro
Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
Department of Physics, University of Pavia, Via Bassi 6, 27100 Pavia, Italy.
Nanomaterials (Basel). 2017 Jan 6;7(1):7. doi: 10.3390/nano7010007.
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.
一层具有特定局部表面等离子体共振（LSPR）特性的银纳米板被接枝到氨基功能化的块状玻璃表面，以实现双重抗菌作用：（i）基于Ag⁺释放的众所周知的长期抗菌效果；（ii）一种“按需”作用，可通过利用银纳米物体的光热特性来开启。用波长落入近红外区域所谓“治疗窗口”的激光照射这些样品，能在几分钟的时间尺度内增强银纳米颗粒的经典抗菌效果。我们展示了如何利用这两种作用几乎完全消除两种具有代表性的革兰氏阳性菌和革兰氏阴性菌菌株的菌量。
