On the effect of Fe oleate by-product in nano-stirbar synthesis. Issue 36 (11th September 2020)

• Record Type: Journal Article
• Authors: Hu, Ting; Ji, Qiaozhen; Chong, Wen Han; Xin, Wenwen; Liu, Xueyang; Chen, Hongyu
• Is Part Of: Nanoscale. Volume 12:Issue 36(2020)
• Page Start: 18640
• Page End: 18645
• Publication Date: 2020-09-11
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d0nr04453a
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Finding the oleate by-product as the culprit makes it possible to synthesize the smallest nano-stirbars. Abstract : We show that the by-product obtained from the preparation of Fe3 O4 nanoparticles has dramatic effects on the synthesis of nano-stirbars. It is an oily substance likely resulting from the polymerization of oleic acid, followed by coordination/crosslinking with Fe ions. As such it is extremely difficult to remove it by conventional methods. By combining nonpolar organic solvent, prolonged swelling, and low-speed centrifugation, the by-product is successfully removed. Thus, various magnetic nanoparticles could be used for synthesizing nano-stirbars. Among them, the smallest nano-stirbars have reached a width of 21 nm and a length of ∼350 nm, setting a record. The nano-stirbars could be directly driven using a common hotplate stirrer, to facilitate mixing in tiny spaces.