通过阻抗和噪声测量对用于生物应用的磷酸盐缓冲盐溶液中的金电极进行表征。

Characterization of gold electrodes in phosphate buffered saline solution by impedance and noise measurements for biological applications.

作者信息

McAdams E T, Jossinet J, Subramanian R, McCauley R G E

机构信息

NIBEC, Ulster Univ., Jordanstown, Northern Ireland, UK.

出版信息

Conf Proc IEEE Eng Med Biol Soc. 2006;2006:4594-7. doi: 10.1109/IEMBS.2006.260406.

DOI:10.1109/IEMBS.2006.260406

PMID:17946639

Abstract

Impedance spectroscopy and noise measurements have been used to study gold electrodes of three different surface areas in phosphate buffered saline (PBS) solution. The gold-PBS solution interface can be modeled by a charge transfer resistance in parallel with an interfacial constant phase element (CPE) which are in series with the solution resistance. The voltage noise fluctuations were analyzed using the fast Fourier transform (FFT) method. It is found that the voltage noise power is characterized by a 1/f(alpha) spectrum in the low frequency range. The value of alpha is observed to be double that of the CPE coefficient beta. The authors suggest a link between the interface impedance and the measured noise.

摘要

阻抗谱和噪声测量已被用于研究在磷酸盐缓冲盐水（PBS）溶液中三种不同表面积的金电极。金-PBS溶液界面可以用一个与界面常相位元件（CPE）并联的电荷转移电阻来建模，它们与溶液电阻串联。使用快速傅里叶变换（FFT）方法分析了电压噪声波动。发现在低频范围内电压噪声功率具有1/f(α)谱的特征。观察到α的值是CPE系数β值的两倍。作者提出了界面阻抗与测量噪声之间的联系。