石墨烯
检出限
介电谱
傅里叶变换红外光谱
循环伏安法
微分脉冲伏安法
材料科学
电极
核化学
氧化石墨
化学
电化学
化学工程
色谱法
纳米技术
物理化学
工程类
作者
Tunca Karasu,Neslihan İdil,Erdoğan Özgür,Lokman Uzun
标识
DOI:10.1016/j.colsurfa.2023.132788
摘要
In this study, molecularly imprinted polydopamine films were prepared on graphene oxide-modified graphite electrodes by chemical oxidation of dopamine in the presence of template molecules of P. aeruginosa. The electrodes were electrochemically characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). The electrodes were also chemically characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). According to the results, films were successfully deposited on the electrodes and displayed increased electrical conductivity in combination with graphene oxide. After template removal, selective cavities for P. aeruginosa were exposed. The analytical performances of the electrodes were tested using DPV in the concentration range of 102 – 108 CFU/mL. Meanwhile, the limit of detection (LOD) and limit of quantification (LOQ) were calculated as 1.85 CFU/mL, and 6.50 CFU/mL, respectively. The sensor was also highly selective against P. aeruginosa in comparison to Escherichia coli, Staphylococcus aureus, and Bacillus subtilis being evaluated as potential interfering competitors.
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