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首页> 外文期刊>Materials science & engineering >The development of an electrochemical nanoaptasensor to sensing chloramphenicol using a nanocomposite consisting of graphene oxide functionalized with (3-Aminopropyl) triethoxysilane and silver nanoparticles
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The development of an electrochemical nanoaptasensor to sensing chloramphenicol using a nanocomposite consisting of graphene oxide functionalized with (3-Aminopropyl) triethoxysilane and silver nanoparticles

机译：使用由（3-氨基丙基）三乙氧基硅烷官能化的氧化石墨烯和银纳米颗粒组成的纳米复合材料开发用于传感氯霉素的电化学纳米适体传感器的开发

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摘要

In the present research, a nanoaptasensor is proposed for electrochemical measurement of chloramphenicol (CAP). To this purpose, the nanocomposite prepared from graphene oxide and functionalized with (3-Aminopropyl) triethoxysilane/silver nanoparticles to the abbreviated AgNPs/[NH2Si]-f-GO, was utilized to modify the glassy carbon electrode (GCE). Furthermore, the modified electrode was also investigated using the electrochemical methods such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The AgNPs/[NH2Si]-f-GO nanocomposite was investigated by UV-Vis spectrophotometry. Fourier transform infrared (FT-IR) spectrometry and transmission electron microscopy (TEM). Moreover, [Fe(CN)(6)](3-/4) solution in the role of an electrochemical probe was applied. The AgNPs/[NH2Si]-f-GO nanocomposite was confirmed as a good layer to covalent immobilization of aptamer (Apt) onto the GCE surface. In this sense, the DPV was used as a sensitive electrochemical technique for the measurement of CAP with an appropriate linear concentration range which was found to be between 10 pM and 0.2 mu M and, with a low limit of detection, it equaled 3.3 pM. CAP which was identified in the presence of other usual antibiotics existed in the real samples.
机译：在本研究中，提出了一种纳米适体传感器，用于电化学测量氯霉素（CAP）。为此，利用由氧化石墨烯制备并用（3-氨基丙基）三乙氧基硅烷/银纳米颗粒官能化为缩写的AgNPs / [NH2Si] -f-GO的纳米复合材料来修饰玻璃碳电极（GCE）。此外，还使用电化学方法，例如电化学阻抗谱（EIS），循环伏安法（CV）和差动脉冲伏安法（DPV）研究了改性电极。用紫外可见分光光度法研究了AgNPs / [NH2Si] -f-GO纳米复合材料。傅里叶变换红外（FT-IR）光谱和透射电子显微镜（TEM）。此外，应用了具有电化学探针作用的[Fe（CN）（6）]（3- / 4）溶液。 AgNPs / [NH2Si] -f-GO纳米复合材料被确认为将适体（Apt）共价固定在GCE表面的良好层。从这个意义上讲，DPV用作灵敏的电化学技术，用于测量CAP的线性浓度范围合适，该浓度范围介于10 pM和0.2μM之间，并且检测下限为3.3 pM。实际样品中存在在其他常见抗生素存在下鉴定出的CAP。

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