کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6603226 1424086 2018 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impedance technique for monitoring of apatite precipitation from simulated body fluid
ترجمه فارسی عنوان
تکنیک امپدانس برای نظارت بر بارش آپاتیت از مایع بدن شبیه سازی شده
کلمات کلیدی
آلیاژ تیتانیوم بتا نانولوله ها، امپدانس الکتروشیمیایی، مایع بدن شبیه سازی شده، آفت کش
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
In vitro testing of bioactivity of metallic materials is frequently executed in simulated body fluid. Measurements are usually used as yes/no test. Samples are removed after some time of exposure from the environment and the level of bone-like apatite precipitation is evaluated. The goal of the presented study was to determine the ability of electrochemical techniques to detect changes on the phase boundary with sufficient sensitivity. The behaviour of Ti-35Nb-2Zr-0.2O alloy with modified surfaces was studied in this work. Nanotubes with three different diameters were prepared by anodic oxidation. Modified surfaces were described in the terms of morphology and chemical composition. Specimens were exposed to simulated body fluid and apatite precipitation was monitored. The electrochemical impedance spectroscopy was used for the nanotubes - electrolyte phase boundary changes description. Measurement at constant frequency was used for determination of the apatite precipitation. The surface analysis indicated enrichment of the nanotubular layer by niobium. The exposure in simulated body fluid resulted in apatite layer creation on the nanotubes with the largest diameter only. The changes on phase boundary were clearly detected by electrochemical impedance spectroscopy in a broad range of frequencies, constant frequency impedance measurement allowed for the determination of incubation period.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 271, 1 May 2018, Pages 158-164
نویسندگان
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