Antibacterial and release properties of Ag nanoparticles on dopamine coated carbon nanotubes

Author(s): Chen Zhuang, Xiangping Hao,Wenchao Liu, Shougang Chen

The multi-wall carbon nanotube (MCNT) was selected to combine with nanosilver in order to increase the mechanical properties and reduce the releasing rate of nanosilver in solutions. The higher dispersion of Ag nanoparticles (AgNPs) was in-situ prepared on the dopamine coated carbon nanotubes by a mild and environmentally friendly method. The antibacterial activity of hybrid material was investigated by the disk-diffusion test against Gram-negative bacteria. Compared with the MCNT/Ag composites, the introduction of polydopamine (PDA) on the MCNT surface obviously improves the deposition of AgNPs and increased the long-term antibacterial property, and the Ag/PDA/MWCNTs hybrid materials exhibited excellent antibacterial ability.

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