When function is biological: Discerning how silver nanoparticle structure dictates antimicrobial activity

iScience

卷:25

George Bennett¹  Vicki L. Colvin²  Caitlin M. Masterson²  Zhen Xiao²  Qingbo Zhang²  Yue Hu²  Arash Bohloul³  Wonhee Jang³  Daniel Garcia-Rojas³  Hema L. Puppala³ 

[1] Department of Biosciences, Rice University, Houston, TX 77005, USA;

[2] Department of Chemistry and School of Engineering, Brown University, Providence RI 02912, USA;

[3] Department of Chemistry, Rice University, Houston, TX 77005, USA;

关键词: Microbiology;    Nanomaterials;    Nanoparticles;    Nanotoxicology;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Silver nanomaterials have potent antibacterial properties that are the foundation for their wide commercial use as well as for concerns about their unintended environmental impact. The nanoparticles themselves are relatively biologically inert but they can undergo oxidative dissolution yielding toxic silver ions. A quantitative relationship between silver material structure and dissolution, and thus antimicrobial activity, has yet to be established. Here, this dissolution process and associated biological activity is characterized using uniform nanoparticles with variable dimension, shape, and surface chemistry. From this, a phenomenological model emerges that quantitatively relates material structure to both silver dissolution and microbial toxicity. Shape has the most profound influence on antibacterial activity, and surprisingly, surface coatings the least. These results illustrate how material structure may be optimized for antimicrobial properties and suggest strategies for minimizing silver nanoparticle effects on microbes.

【 授权许可】

Unknown