Wang, Dan; Lin, Bingbing; Shen, Taipeng; Wu, Jun; Hao, Fuhua; Xia, Chunchao; Gong, Qiyong; Tang, Huiru; Song, Bin; Ai, Hua, Control of the interparticle spacing in superparamagnetic iron oxide nanoparticle clusters by surface ligand engineering, Chinese Physics B 25, 077504 (2016).
https://iopscience.iop.org/article/10.1088/1674-1056/25/7/077504/meta