This paper presents two bottom-up methods for the green synthesis of spherical carbon dots (Cdots) and silver/Cdots (Ag@Cdots) nanoparticles at alkaline medium. Both syntheses are carried out without separation and purification steps with a microwave exposure time between 30 and 60 s. In both case a natural product as glucose was used as precursor and capping agent. The obtained Cdots and Ag@Cdots hybrid are spherical in shape and monodisperse, with average particle size of lower than 10 nm and 13 nm respectively. In comparison with the methods previously reported, which need high energy consumption and/or long reaction time. The proposed methodologies are simple, low cost, environment-friendly and in accordance with green chemistry research. The morphology, composition and structure of the obtained nanoparticles were characterized by Zeta Potential and hydrodynamic size measurements, transmission electron microscopy (TEM), X-ray diffraction (XRD), ATR-FTIR spectrophotometry and thermogavimetric analysis (TGA). The synthesized nanoparticles were applied to sense tetracycline residues taking into account their fluorescent properties.

中文翻译：

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无需分离和纯化过程的碳点和银/碳杂化纳米粒子的新型合成

本文提出了两种自下而上的方法，用于在碱性介质下绿色合成球形碳点（Cdots）和银/ Cdots（Ag @ Cdots）纳米粒子。两种合成都无需分离和纯化步骤，微波暴露时间在30到60 s之间。在两种情况下，均使用天然产物葡萄糖作为前体和封端剂。所得的Cdots和Ag @ Cdots杂化物为球形和单分散的，平均粒径分别小于10nm和13nm。与先前报道的方法相比，该方法需要高能耗和/或长反应时间。所提出的方法简单，成本低廉，环境友好并且符合绿色化学研究的要求。形态 通过Zeta电位和流体动力学尺寸测量，透射电子显微镜（TEM），X射线衍射（XRD），ATR-FTIR分光光度法和热重分析（TGA）来表征所获得的纳米颗粒的组成和结构。考虑到它们的荧光特性，将合成的纳米颗粒应用于感知四环素残基。