文献类型：期刊文献

英文题名：In Situ Liquid Cell Transmission Electron Microscopy Observation of Dynamic Process of Oleic Acid Emulsion with Gold Nanorods

作者：Wang, Chuanzhen[1];Chen, Xin[1];Wu, Yulian[1];Li, Yan[1];Cheng, Siyu[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2020

卷号：124

期号：47

起止页码：26018

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;EI(收录号：20204809548387);WOS:【SCI-EXPANDED(收录号:WOS:000595545800040)】；

基金：This work was supported by the National Natural Science Foundation of China (21875066); Shanghai Leading Academic Discipline Project (B502); and the Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Emulsions - Emulsification - Gold - Drops - Oleic acid - Ostwald ripening - Transmissions - Sols - High resolution transmission electron microscopy - Nanorods - Plasmonic nanoparticles - Plasmonics

摘要：Oleic acid (OA) emulsion is widely used in nanomaterial synthesis and applications. The emulsion droplets can serve as template scaffolds for nanoparticle self-organization, while adding nanoparticles to the emulsion is beneficial to the development of new intelligent emulsions. In this study, by direct dynamic observation with in situ liquid cell transmission electron microscopy (LC-TEM), it is found that the sizes of OA emulsion droplets incorporated with gold nanorods (Au NRs) were significantly bigger than those without Au NRs, as well as they tend to grow up with time. Most OA growth follows an Ostwald ripening mechanism, while certain Au NR distribution on the OA surface may lead to anti-Ostwald ripening behavior. At the OA/water/SiNx window triple phase boundary, Au NRs prefer to form "end-to-end" chain structures, while at the OA/water double phase boundary or inside an OA droplet, they prefer to form more compact clusters. These results demonstrate that the OA emulsion droplets may guide the assembly of nanomaterials into different nanostructures, and understanding and controlling them might contribute to the development of advanced self-assembled noble metal nanostructures with new functions. High-resolution in situ characterization of nanomaterials in emulsion systems will provide new opportunities for the research and development of new self-assembled materials.