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首页> 外文期刊>Electroanalysis >Anodic Desorption Monitored by Voltammetric and Gravimetric Measurements for Fast Estimation of Surface Coverage of Complex Organic Molecules on Au Electrodes
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Anodic Desorption Monitored by Voltammetric and Gravimetric Measurements for Fast Estimation of Surface Coverage of Complex Organic Molecules on Au Electrodes

机译：通过伏安和重量测量监测阳极解吸，以便快速估计Au电极上复杂有机分子的表面覆盖

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摘要

A methodology for fast determination of surface coverage of molecules or nanostructures assembled in monolayers at the surface of gold electrodes has been developed. The approach is based on anodic oxidative desorption of the molecules which is controlled by synchronized electrochemical gravimetric and voltammetric measurements. Successive anodic scans induce degradation and oxidative desorption of the assembled molecules resulting in a decrease in electrode mass. The completion of desorption is accurately controlled by the charge associated with adsorption of hydroxyl and oxygen species at the bare gold surface. The proposed method can be used to (i) complement the classical approaches or (ii) to estimate the surface coverage for nanostructures whose adsorption requirements, such as long-time assembling, ex-situ chemical treatment and other ex-situ or in-situ multistage procedures, complicate utilization of common approaches. Adsorbed nanostructures composed of poly(amido)amine dendrimers terminated with thiol functionalized viologen head groups were used as the model objects to evaluate the proposed methodology.
机译：已经开发了一种用于快速测定在金电极表面上组装在单层中的分子或纳米结构的表面覆盖的方法。该方法基于由同步电化学重量和伏安测量控制的分子的阳极氧化解吸。连续的阳极扫描诱导组装分子的降解和氧化解吸导致电极物质的降低。通过与裸金表面的羟基和氧物质的吸附相关的电荷精确地控制解吸的完成。所提出的方法可用于（i）补充经典方法或（ii）来估计其吸附要求的纳米结构的表面覆盖，例如长时间组装，前原位化学处理和其他出原位或原位多级手术，使普通方法的利用复杂化。用与硫醇官能化VIOLOGEN头部终止的聚（amido）胺树枝状聚合物组成的吸附纳米结构用作模型对象，以评估所提出的方法。

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