TY - JOUR
T1 - Corrosion resistance of Ti modified by chitosan-gold nanoparticles for orthopedic implantation
AU - Farghali, R. A.
AU - Fekry, A. M.
AU - Ahmed, Rasha A.
AU - Elhakim, H. K. A.
N1 - KAUST Repository Item: Exported on 2021-11-01
Acknowledgements: This work was financial support by Taif University, Kingdom of Saudi Arabia. This research was also carried out in cooperation with Faculty of Science, Cairo University. The authors would like to thank Core labs in King Abdullah University of science and technology (KAUST) for performing XPS analysis.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2015
Y1 - 2015
N2 - Highly uniform bionanocomposite film composed of chitosan (CS) and gold nanoparticles (AuNPs) was synthesized successfully by electrodeposition method. The influence of AuNPs/CS bionanocomposite film on corrosion resistance of Ti was investigated. Surface morphology and compositional properties of the bionanocomposite were analyzed by scanning electron microscope (SEM), energy dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS). Moreover, cyclic voltammetry (CV), open-circuit potential measurements (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (Rp) were used to examine the corrosion behavior in Hanks' solution. In comparison with Ti, Nyquist and Bode plots displayed higher impedance values and phase angles for AuNPs/CS biocomposite denoting a more protective passive film on Ti with inhibition efficiency (IE%) of 98%. An electric equivalent circuit with three time constants was modeled for the bionanocomposite. In addition, the antibacterial effect revealed the high efficiencies of the bionanocomposite film for inhibiting bacterial growth. The combination of the high biocompatibility of chitosan and strong adsorption ability of AuNPs make AuNPs/CS bionanocomposite promising candidate for modifying biomaterial surfaces for medical implantation applications.
AB - Highly uniform bionanocomposite film composed of chitosan (CS) and gold nanoparticles (AuNPs) was synthesized successfully by electrodeposition method. The influence of AuNPs/CS bionanocomposite film on corrosion resistance of Ti was investigated. Surface morphology and compositional properties of the bionanocomposite were analyzed by scanning electron microscope (SEM), energy dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS). Moreover, cyclic voltammetry (CV), open-circuit potential measurements (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (Rp) were used to examine the corrosion behavior in Hanks' solution. In comparison with Ti, Nyquist and Bode plots displayed higher impedance values and phase angles for AuNPs/CS biocomposite denoting a more protective passive film on Ti with inhibition efficiency (IE%) of 98%. An electric equivalent circuit with three time constants was modeled for the bionanocomposite. In addition, the antibacterial effect revealed the high efficiencies of the bionanocomposite film for inhibiting bacterial growth. The combination of the high biocompatibility of chitosan and strong adsorption ability of AuNPs make AuNPs/CS bionanocomposite promising candidate for modifying biomaterial surfaces for medical implantation applications.
UR - http://hdl.handle.net/10754/673003
UR - https://linkinghub.elsevier.com/retrieve/pii/S0141813015003372
UR - http://www.scopus.com/inward/record.url?scp=84930959885&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2015.04.078
DO - 10.1016/j.ijbiomac.2015.04.078
M3 - Article
SN - 1879-0003
VL - 79
SP - 787
EP - 799
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -