De Zhang

TL;DR: Zhang et al. as mentioned in this paper explored the influence of environmental factors on the quality of tea fresh leaves, and then, based on the analyses of the physical and chemical properties of the soil where they grew, comprehensively analyzed the composition and content of volatile and non-volatile substances in these tea fresh leaf harvested from 27 sampling sites.

TL;DR: In this article, a preparation method for spherical gold nano-particles with the controlled size is presented, which is very simple and fast, specific equipment does not need, the process repeatability is high, and the large-scale production is achieved advantageously.

TL;DR: In this article , the authors developed a high-performance SurfaceEnhanced Raman Spectroscopy (SERS) analytical platform by self-assembling Au nanoparticles at the three-phase liquid-liquid interface.

TL;DR: In this article, a graphene silver SERS composite substrate and a preparation method for Raman detection is presented. And the method comprises the following steps: (a) respectively adding a graphene oxide dispersion liquid with a first concentration, a silver nitrate solution with a second concentration and deionized water into a container according to first, second and third preset volumes, and fully stirring; (b) adding an ascorbic acid solution with fourth preset volume and a third concentration into the container, and full stirring to form a reaction product; (c) separating the reaction

TL;DR: In this paper , three methods of preparing metal-organic framework (MOF)-based SERS substrates are introduced, and the latest applications of MOF-based substrate in biosensors, the environment, gases and medical treatments are discussed.