Research Article

Preparation and Characterization of Novel Perfluorooctyl Bromide Nanoparticle as Ultrasound Contrast Agent via Layer-by-Layer Self-Assembly for Folate-Receptor-Mediated Tumor Imaging

Figure 2

(a) 1H NMR spectrum of FA-PEG-CS. Solvent DCl/D2O (1 : 100). (b) Physical appearance of the FA-PEG-CS.
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(b)