Assembly and antibacterial activity of horizontally oriented silver nanoplates

作者：Zhang Renjie^*; Kang Yongqing; Xie Beibei

来源：Journal of Applied Polymer Science, 2015, 132(24): 42070.

DOI：10.1002/app.42070

• biomaterials
• nanoparticles
• nanowires and nanocrystals
• polyelectrolytes
• self-assembly
• surfaces and interfaces

This work describes a strategy of assembling horizontally oriented Ag nanoplates (AgNPTs) with PSS-Ag as the precursor of silver by the layer-by-layer (LbL) technique on planar substrates. These AgNPTs have a lateral dimension of 20-80 nm and a thickness of 9-12 nm. A corresponding formation mechanism of these AgNPTs is discussed considering the orientation of the polyelectrolytes molecules, as well as their confinement effect on the diffusion of Ag nanoparticles. The exposed horizontal surfaces of the AgNPTs correspond to low free energy; they show an active antimicrobial activity. No Staphylococcus aureus colonies appear on the nutrient agar medium inoculated and incubated with S. aureus solutions treated by LbL films containing AgNPTs. The horizontally oriented AgNPTs by the described strategy in this work not only provides a novel method for controlled assembly of AgNPTs, but also provides insight in the antimicrobial behavior of nanoplate surfaces with low free energy.

• 出版日期2015-6-20
• 单位山东大学