基于磷酸基功能化半胱胺自组装单层纳米传感器的制备与电化学表征( Preparation and electrochemical characterization of a new nanosensor based on self-assembled monolayer of cysteamine functionalized with phosphate groups )

RK Shervedani SA Mozaffari Experimental/ electrochemical electrodes electrochemical impedance spectroscopy gold materials preparation monolayers organic compounds self-assembly voltammetry (chemical analysis)/ electrochemical characterization cysteamine self-assembled monolayer preparation phosphate groups gold electrode glutaraldehyde 2-aminoethyl dihydrogen phosphate thin film modified electrode uranyl cations aqueous solution cyclic voltammetry electrochemical impedance spectroscopy charge-transfer resistance cation concentration Au UO 22+/ A8245 Electrochemistry and electrophoresis A8280F Electrochemical analytical methods A8120 Other methods of preparation of materials A6817 Monolayers and Langmuir-Blodgett films/ Au/sur Au /el UO2/bin O2 /bin O/bin U/bin

研究了自组装三层修饰金电极的制备及其电化学性能。修改涉及三个步骤的方法；(i)制备半胱胺自组装单层，Au-CA，(ii)戊二醛活化Au-CA制备Au-CA-GA，(iii)用2-氨基乙基磷酸二氢酯修饰Au-CA-GA以磷酸基团官能化表面，Au-Ca-Ga-AEDP。制备的薄膜修饰电极成功地识别了水溶液中的铀酰阳离子(Uu2 2+）。循环伏安法(CV)和电化学阻抗谱法(EIS)分别对每一步进行了跟踪。EIS和CV结果证实了该膜对UO2 2+的高亲和力。EIS数据可以根据膜的电荷转移电阻（R ct）随阳离子浓度的变化来识别UO2 2+。获得了三个数量级以上的动态范围。

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