Polydopamine assisted immobilisation of copper(II) on titanium for antibacterial applications

Abstract

Copper(II) were immobilised onto medical titanium surface by polydopamine (PDA) chelating, to build intrinsic antibacterial implant materials for inhibition of implant infection. A scanning electrical microscope showed that the modified titanium surface morphology was a porous nanostructure. An energy dispersive spectrometer showed the existence of Cu, and X-ray photoelectron spectroscopy results further confirmed that the immobilised copper element was in the form of Cu(II). Bacteria plate colony counting results showed that modified titanium surface had decent antibacterial property, matching the ion release outcomes. It could be conclude that the PDA assisted Cu(II) immobilisation was an efficient and effective method for antibacterial modification of titanium.

Keywords:

• Copper(II)
• Polydopamine
• Antibacterial
• Titanium
• Surface modification

Acknowledgements

The authors gratefully acknowledge the financial support of the National Basic Research Program of China (grant no. 2012CB619100) and the National Natural Science Foundation of China (grant nos. 51232002, 51372087 and 51072055).