Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006 Oviedo, Spain.
Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006 Oviedo, Spain.
Talanta. 2018 Feb 1;178:160-165. doi: 10.1016/j.talanta.2017.08.104. Epub 2017 Sep 1.
This work describes the development and evaluation of a new electrochemical platform based on the sustainable generation of gold-nanoparticles on paper-based gold-sputtered electrodes. The disposable porous paper electrode is combined with screen-printed electrodes for ensuring a precise electrogeneration of nanoparticles and also for the evaluation of these simple, versatile and low-cost microfluidic devices. Two types of chromatographic paper with different thicknesses have been evaluated. Paper gold working electrodes modified with gold nanoparticles were characterized by scanning electron microscopy and cyclic voltammetry using potassium ferrocyanide as a common redox probe, showing an improved electrochemical performance when compared to bare gold electrodes. The platform has been applied to the non-enzymatic determination of glucose, molecule of enormous interest. The porous gold structure made by sputtering on paper, modified with electrogenerated nanoparticles allowed precise and accurate determination of the analyte in beverages at low potential.
本工作描述了一种新的电化学平台的开发和评估，该平台基于在基于纸张的镀金溅射电极上可持续生成金纳米粒子。一次性多孔纸电极与丝网印刷电极相结合，以确保精确地电生成纳米粒子，并评估这些简单、多功能且低成本的微流控器件。评估了两种具有不同厚度的色谱纸。用金纳米粒子修饰的纸金工作电极通过扫描电子显微镜和循环伏安法用铁氰化钾作为常见的氧化还原探针进行了表征，与裸金电极相比，显示出电化学性能得到了改善。该平台已应用于非酶促测定葡萄糖，这是一种非常有意义的分子。通过在纸上溅射制备的多孔金结构，用电生成的纳米粒子进行修饰，允许在低电势下对饮料中的分析物进行精确和准确的测定。
