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具有光热性能的用于远程细菌根除的纳米复合喷涂薄膜

Nanocomposite Sprayed Films with Photo-Thermal Properties for Remote Bacteria Eradication.

作者信息

Borzenkov Mykola, Chirico Giuseppe, Pallavicini Piersandro, Sperandeo Paola, Polissi Alessandra, Dacarro Giacomo, Doveri Lavinia, Collini Maddalena, Sironi Laura, Bouzin Margaux, D'Alfonso Laura

机构信息

Department of Medicine and Surgery, Nanomedicine Center, University of Milano-Bicocca, Via Raoul Follereau 3, 20854 Vedano al Lambro (MB), Italy.

Department of Physics, University of Milano-Bicocca, Piazza della Scienza 3, 20126 Milan, Italy.

出版信息

Nanomaterials (Basel). 2020 Apr 20;10(4):786. doi: 10.3390/nano10040786.

DOI:10.3390/nano10040786
PMID:32325935
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7221876/
Abstract

Currently there is a strong demand for novel protective materials with efficient antibacterial properties. Nanocomposite materials loaded with photo-thermally active nanoparticles can offer promising opportunities due to the local increase of temperature upon near-infrared (NIR) light exposure capable of eradicating bacteria. In this work, we fabricated antibacterial films obtained by spraying on glass slides aqueous solutions of polymers, containing highly photo-thermally active gold nanostars (GNS) or Prussian Blue (PB) nanoparticles. Under NIR light irradiation with low intensities (0.35 W/cm) these films demonstrated a pronounced photo-thermal effect: Δ up to 26.4 °C for the GNS-containing films and Δ up to 45.8 °C for the PB-containing films. In the latter case, such a local temperature increase demonstrated a remarkable effect on a Gram-negative strain () killing (84% of dead bacteria), and a promising effect on a Gram-positive strain () eradication (69% of dead bacteria). The fabricated films are promising prototypes for further development of lightweight surfaces with efficient antibacterial action that can be remotely activated on demand.

摘要

目前，对具有高效抗菌性能的新型防护材料有强烈需求。负载光热活性纳米粒子的纳米复合材料因在近红外（NIR）光照射下局部温度升高能够根除细菌而提供了有前景的机会。在这项工作中，我们通过将含有高光热活性金纳米星（GNS）或普鲁士蓝（PB）纳米粒子的聚合物水溶液喷涂在载玻片上制备了抗菌薄膜。在低强度（0.35 W/cm）的近红外光照射下，这些薄膜表现出明显的光热效应：含GNS的薄膜温度升高高达26.4℃，含PB的薄膜温度升高高达45.8℃。在后一种情况下，这种局部温度升高对革兰氏阴性菌菌株（）的杀灭显示出显著效果（84%的细菌死亡），对革兰氏阳性菌菌株（）的根除显示出有前景的效果（69%的细菌死亡）。所制备的薄膜是进一步开发具有高效抗菌作用的轻质表面的有前景的原型，这种表面可按需远程激活。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/0e1650d4e35a/nanomaterials-10-00786-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/993e2d889ed5/nanomaterials-10-00786-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/2dc770015ac7/nanomaterials-10-00786-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/c56c8239fb8f/nanomaterials-10-00786-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/17c3ad4443a7/nanomaterials-10-00786-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/0427840d678b/nanomaterials-10-00786-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/487ce01f341c/nanomaterials-10-00786-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/08cbc3e1abba/nanomaterials-10-00786-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/0e1650d4e35a/nanomaterials-10-00786-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/993e2d889ed5/nanomaterials-10-00786-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/2dc770015ac7/nanomaterials-10-00786-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/c56c8239fb8f/nanomaterials-10-00786-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/17c3ad4443a7/nanomaterials-10-00786-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/0427840d678b/nanomaterials-10-00786-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/487ce01f341c/nanomaterials-10-00786-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/08cbc3e1abba/nanomaterials-10-00786-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6597/7221876/0e1650d4e35a/nanomaterials-10-00786-g008.jpg

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