Effects of concentration of Ag nanoparticles on surface structure and in vitro biological responses of oxide layer on pure titanium via plasma electrolytic oxidation

Title
Effects of concentration of Ag nanoparticles on surface structure and in vitro biological responses of oxide layer on pure titanium via plasma electrolytic oxidation
Author(s)
고영건신기룡[신기룡]김연성[김연성]김계원[김계원]양해웅신동혁[신동혁]
Keywords
SILVER NANOPARTICLES; ELECTROCHEMICAL SYNTHESIS; INFECTIONS; OSTEOBLASTS; PREVENTION; IMPLANTS; ALLOY; CELLS; SCALE; TI
Issue Date
201508
Publisher
ELSEVIER SCIENCE BV
Citation
APPLIED SURFACE SCIENCE, v.347, pp.574 - 582
Abstract
This study was to investigate how Ag nanoparticles with various concentrations affect the surface structure and in vitro biological properties of oxide layers on the pure titanium produced by a plasma electrolytic oxidation (PEO) process. For this aim, PEO processes were carried out at an AC current density of 100 mA/cm(2) for 300 s in potassium pyrophosphate (K4P2O7) electrolytes containing 0, 0.1, 0.3 and 0.5 g/lAg nanoparticles. Structural investigations using scanning electron microscopy evidenced that the oxide layers showed the successful incorporation of Ag nanoparticles, and the topographical deformation of the porous surface was found when the concentration of Ag nanoparticles was more than 0.1 g/l. Based on the anti-bacterial activity of all oxide layers, the Ag nanoparticles uniformly spread were of considerable importance in triggering the disinfection of E. coli bacteria. The bone forming abilities and cell (MC3T3-E1) proliferation rates of oxide layers produced in electrolytes containing 0 and 0.1 g/l Ag nanoparticles were higher than those containing 0.3 and 0.5 g/lAg nanoparticles. Consequently, the oxide layer on pure titanium via PEO process in the electrolyte with 0.1 g/l Ag nanoparticles exhibited better the bioactivity accompanying the anti-bacterial activity. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/31326http://dx.doi.org/10.1016/j.apsusc.2015.04.161
ISSN
0169-4332
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공과대학 > 신소재공학부 > Articles
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