Control of the interparticle spacing in superparamagnetic iron oxide nanoparticle clusters by surface ligand engineering

Wang Dan¹, Lin Bingbing¹, Shen Taipeng¹, Wu Jun¹, Hao Fuhua², Xia Chunchao³, Gong Qiyong³, Tang Huiru², Song Bin³, Ai Hua^{1, 3, †,}

TEM images of SPIO loaded micelles. (a) mPEG5k-PCL5k/OA-SPIO; (b) mPEG5k-PCL5k/PCL1k-SPIO; (c) mPEG5k-PCL5k/PCL2k-SPIO; (d) mPEG5k-PCL5k/PLA1k-SPIO; (e) mPEG5k-PLA5k/OA-SPIO; (f) mPEG5k-PLA5k/PCL1k-SPIO; (g) mPEG5k-PLA5k/PCL2k-SPIO; (h) mPEG5k-PLA5k/PLA1k-SPIO.