Department of Chemical Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Naka-cho , Koganei, Tokyo , 184-8588 , Japan.
Langmuir. 2018 May 15;34(19):5495-5504. doi: 10.1021/acs.langmuir.7b03870. Epub 2018 May 2.
Design, control, and direct characterization of surface properties are prerequisites to all the practical applications of nanoparticles. Since stable and homogeneous colloidal conditions are required for most applications, the amenability of nanoparticles to in-solution processing must also be addressed. Herein, we demonstrate that solution H NMR spectroscopy is an effective tool for direct monitoring of the production of Ag nanoparticles. The production consists of two stages, complexation and reduction, which are both clearly observed by H NMR spectroscopy. Design and synthesis of a series of amphiphilic amines have led to the one-step production of "flexibly" stable colloidal Ag nanoparticles, which form clear stable brown solutions in a wide range of solvents.
设计、控制和直接表征表面性质是纳米粒子实际应用的前提。由于大多数应用都需要稳定且均匀的胶体条件，因此还必须解决纳米粒子在溶液中的加工适应性问题。在此，我们证明溶液核磁共振波谱法是直接监测银纳米粒子制备的有效工具。制备过程包括络合和还原两个阶段，这两个阶段都可以通过核磁共振波谱法清楚地观察到。设计和合成了一系列两亲性胺，实现了“灵活”稳定胶体银纳米粒子的一步法制备，该方法在广泛的溶剂中形成清晰稳定的棕色溶液。
