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Facile Preparation of Gold Nanoparticle Modified Pencil Graphite Electrode

机译：金纳米颗粒改性铅笔石墨电极的便利制备

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The purpose of this research was to prepare gold nanoparticle (AuNP) modified disposable pencil graphite electrode (PGE). The AuNP was prepared using trisodium citrate reduced gold ion solution. The PGE surface modification was carried out by immersing a bare PGE in poly (diallyldimethylammonium chloride) (PDDA) and then in AuNP solution at room temperature. The characterization of the bare and modified PGE surfaces was carried out using field emission scanning electron microscopy (FESEM) and cyclic voltammetry in the presence of 0.1 M NaOH. The electrochemical behavior of the modified PGE electrode was investigated using cyclic voltammetry, and impedance spectroscopy in the presence of 5 mM [Fe(CN)6]~(3-/4-) redox probe solution. The obtained result indicated that the modification of AuNP on the PGE surface provided a good electrochemical signal. In order to obtain more sensitive electrochemical signals, the effect of adsorbed AuNP on the PGE surface was also studied.
机译：本研究的目的是制备金纳米颗粒（AUNP）改性一次性铅笔石墨电极（PGE）。使用柠檬酸钠还原金离子溶液制备AUNP。通过浸入聚（二烯丙基甲基氯化铵）（PDDA）中的裸PGE，然后在室温下在AUNP溶液中进行PGE表面改性。使用场发射扫描电子显微镜（FESEM）和循环伏安法在0.1M NaOH存在下进行裸露和改性的PGE表面的表征。使用循环伏安法研究改性PGE电极的电化学行为，并在5mM [Fe（CN）6]〜（3- / 4-）氧化还原探针溶液存在下阻抗光谱。所获得的结果表明，在PGE表面上的AUNP改变提供了良好的电化学信号。为了获得更敏感的电化学信号，还研究了吸附的AUNP对PGE表面的影响。

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