In this study, simultaneous deposition of copper oxide and electro-reduced graphene quantum dots (ErGQDs) on the surface of carbon ceramic electrode (CCE) was reported. The prepared ErGQDs-CuO/CCE was carefully characterized with Fourier transform infrared spectroscopy, X-ray diffraction, fluorescence spectroscopy, scanning electron microscopy and electrochemical techniques in details. According to scan rate studies in hexacyanoferrate, a remarkable increase in the surface coverage in the presence of ErGQDs was achieved. According to square wave voltammetry results, limit of detection, linear range and sensitivity of the developed biosensor for the simultaneous measurement of Adenine (A) and Guanine (G) were obtained to be 0.041 and 0.111 μM, 0.1–13 μM and 0.25–23 μM, and 4.261 and 1.311 μA μM cm⁻² respectively.

中文翻译：

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在碳陶瓷电极表面同时电沉积还原石墨烯量子点/氧化铜纳米复合材料，用于腺嘌呤和鸟嘌呤的电分析

在这项研究中，报道了在碳陶瓷电极 (CCE) 表面同时沉积氧化铜和电还原石墨烯量子点 (ErGQDs)。用傅里叶变换红外光谱、X 射线衍射、荧光光谱、扫描电子显微镜和电化学技术对制备的 ErGQDs-CuO/CCE 进行了详细的表征。根据六氰基铁酸盐的扫描速率研究，在 ErGQD 存在下实现了表面覆盖率的显着增加。根据方波伏安法结果，所开发的用于同时测量腺嘌呤（A）和鸟嘌呤（G）的生物传感器的检测限、线性范围和灵敏度分别为0.041和0.111 μM、0.1-13 μM和0.25-23 μM，以及 4.261 和 1.311 μA μM cm ^-2 分别。