SURFACE MODIFICATION OF COMMERCIALLY PURE TITANIUM BY GOLD-ION IRRADIATION FOR BIOMEDICAL APPLICATIONS

Ameeq Farooq (), Kashif Mairaj Deen, Muhammad Rizwan and Akhlaq Ahmad
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Ameeq Farooq: Institute of Metallurgy & Materials Engineering, Faculty of Chemical and Materials Engineering, University of the Punjab, Lahore, Pakistan
Kashif Mairaj Deen: Institute of Metallurgy & Materials Engineering, Faculty of Chemical and Materials Engineering, University of the Punjab, Lahore, Pakistan†Department of Materials Engineering, The University of British Columbia, Vancouver, BC, Canada V6T 1Z4, Canada
Muhammad Rizwan: #x2021;Department of Metallurgical and Materials Engineering, University of Engineering and Technology (UET), Lahore, Pakistan
Akhlaq Ahmad: #x2021;Department of Metallurgical and Materials Engineering, University of Engineering and Technology (UET), Lahore, Pakistan

Surface Review and Letters (SRL), 2021, vol. 28, issue 09, 1-11

Abstract: This research work’s aim was to enhance the biocompatibility of the commercially pure titanium (cpTi-2) surface via Au-ion irradiation. Various ion dosages, i.e. 7.4×1011 (Au-11), 6.47×1012 (Au-12) and 5.53×1013 (Au-13) ions⋅cm−2, were produced by exposing the polished cpTi-2 samples to Au-ion beam at room temperature. The surface topographic features of cpTi-2 and the effects of Au-ion-implanted surfaces were examined by atomic force microscopy and XRD analysis. Open-Circuit Potential (OCP), Potentiodynamic Polarization Scans (PPS) and Electrochemical Impedance Spectroscopy (EIS) were used to compare the electrochemical behavior of the cpTi-2 and Au-ion-implanted samples in Ringer’s lactate (RL) solution at 37∘C. The effects of Au-ion irradiation on the proliferation of mesenchymal stem cells (MSCs) were estimated during 24h and 48h of exposure. Based on the experimental results, Au-12 samples presented more positive OCP and lower corrosion rate in RL solution than the Au-11 and Au-13 samples. No significant change in the morphology of the MSCs was observed after exposure to the Au-ion-implanted samples. Similar to the controlled medium, the percentage of viability of the cells of the cells on Au-12 increased from 75% to 165% on the surface of Au-13 samples during 48h of incubation indicating the positive effects of Au-ion irradiation for biocompatibility.

Keywords: Ion irradiation; biocompatibility; Electrochemical Impedance Spectroscopy; mesenchymal stem cells (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21500694

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