Wireless Measurement of the Degradation Rates of Thin Film Bioresorbable Metals Using Reflected Impedance
Wireless Measurement of the Degradation Rates of Thin Film Bioresorbable Metals Using Reflected Impedance
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DOI：
10.1109/tsm.2022.3221267
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发表时间：
2023-02
影响因子：
2.7
通讯作者：
Joe Philpott;J. Churm;Vahid Nasrollahi;S. Dimov;C. Anthony;G. Cummins
中科院分区：
文献类型：
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作者：
Joe Philpott;J. Churm;Vahid Nasrollahi;S. Dimov;C. Anthony;G. Cummins
本文概述了一种利用反射阻抗来确定物理瞬态电子器件中生物可吸收金属的电降解速率的方法。该方法使用已知的互感器与简单的单匝盘形线圈几何形状和频率测量系统的相互作用来跟踪薄膜金属环的平均厚度随着其劣化而减小。实验使用$\mathrm {500~ \text {n} \text {m} }$厚的锌环，通过光刻，热蒸发和剥离制造，发现在37 °C去离子水中的平均降解速率为278 nm h−1。在37 °C 1 mM盐酸中的实验发现了两个不同的降解期，总降解速率为632 nm h−1，与使用轮廓测定法测量的608 nm h−1降解速率非常匹配。
A method using reflected impedance to determine the electrical degradation rates of bioresorbable metals for physically transient electronic devices is outlined. This approach uses known mutual inductor interactions with simple single turn disk coil geometries and a frequency measurement system to track the reduction of the mean thickness of a thin film metal ring as it degrades. Experiments using $\mathrm {500~ \text {n} \text {m} }$ thick zinc rings, fabricated by photolithography, thermal evaporation and lift-off, found a mean degradation rate of 278 nm h−1 in 37 °C de-ionised water. Experiments in 37 °C 1 mM hydrochloric acid found two distinct periods of degradation and a total degradation rate of 632 nm h−1 that closely matched the degradation rate measured using profilometry of 608 nm h−1.