Abstract In this account, sodium citrate was used as reductant and stabilizer to decorate reduced graphene oxide (rGO) with 2-aminoethanethiol (2-AET) functionalized and well-distributed gold nanoparticles (AuNPs), as well as to improve the sensitivity and stability of rGO deposited on the electrode surface. The molecular imprinted polymer (MIP) was prepared on the electrode surface using erythrosine (ERT) as the template molecule, and both m-dihydroxybenzene (m-DB) and o-phenylenediamine (o-PD) as functional monomers. A sensitive sensor was then fabricated for the direct determination of ERT. The prepared nanomaterials were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectrum analysis (EDX), and infrared spectroscopy (FT-IR). The properties of the resulting sensor were examined by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). The data revealed that the as-prepared sensor could achieve wide linear range (3.75 × 10−8 to 1.50 × 10−4 M) and low detection limit (4.77 × 10−9 M), meeting the requirements of ERT trace analysis. The stability and reproducibility of the prepared molecular imprinted electrodes showed excellent long-term stability and relevant reproducibility, making these platforms promising for future electrochemical sensors.

中文翻译：

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用 2-氨基乙硫醇功能化金纳米粒子修饰石墨烯，用于赤藓红的分子印迹传感

摘要 在这个帐户中，柠檬酸钠被用作还原剂和稳定剂，用 2-氨基乙硫醇 (2-AET) 功能化和分布良好的金纳米粒子 (AuNPs) 装饰还原氧化石墨烯 (rGO)，并提高灵敏度和稳定性。 rGO 沉积在电极表面。以赤藓红（ERT）为模板分子，间二羟基苯（m-DB）和邻苯二胺（o-PD）为功能单体，在电极表面制备分子印迹聚合物（MIP）。然后制造了用于直接测定 ERT 的灵敏传感器。制备的纳米材料通过扫描电子显微镜（SEM）、原子力显微镜（AFM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、能量色散X射线光谱分析（EDX）、和红外光谱 (FT-IR)。通过循环伏安法 (CV)、差分脉冲伏安法 (DPV) 和电化学阻抗谱 (EIS) 检查所得传感器的特性。数据显示，所制备的传感器可以实现宽线性范围（3.75 × 10-8 至 1.50 × 10-4 M）和低检测限（4.77 × 10-9 M），满足 ERT 痕量分析的要求。所制备的分子印迹电极的稳定性和重现性显示出优异的长期稳定性和相关重现性，使这些平台有望用于未来的电化学传感器。数据显示，所制备的传感器可以实现宽线性范围（3.75 × 10-8 至 1.50 × 10-4 M）和低检测限（4.77 × 10-9 M），满足 ERT 痕量分析的要求。所制备的分子印迹电极的稳定性和重现性显示出优异的长期稳定性和相关重现性，使这些平台有望用于未来的电化学传感器。数据显示，所制备的传感器可以实现宽线性范围（3.75 × 10-8 至 1.50 × 10-4 M）和低检测限（4.77 × 10-9 M），满足 ERT 痕量分析的要求。所制备的分子印迹电极的稳定性和重现性显示出优异的长期稳定性和相关重现性，使这些平台有望用于未来的电化学传感器。