title: Synthesis of biocompatible hybrid magnetic hollow spheres based on encapsulation strategy.
abstract: A kind of novel magnetic hollow spheres was prepared by encapsulating magnetofluid into polymeric hollow spheres. Polymeric hollow nanospheres were constructed by self-assembly of rod-coil complexes, in which the rod-like segments were formed by inclusion of α-cyclodextrins (α-CD) and grafting poly(ethylene glycol) (PEG) chains of chitosan-graft-PEG (CS-g-PEG). Structural characteristics of CS-g-PEG/α-CD hollow spheres were investigated in detail by NMR, XRD, TEM, etc. Furthermore, those hollow spheres showed a pH responsive property which induced a considerable change of their radius. Magnetofluid was physically entrapped into the empty domain while hollow spheres were formed, it was found that the hollow spheres can encapsulate large quantities of magnetofluid and the encapsulated magnetofluid still possess magnetic responsiveness properties. We expect that this strategy may be served as a novel and more straightforward approach to obtain magnetic hollow spheres for biomedical application.
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Ha
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.forename: Yuan
authors.initials: Y
authors.lastname: Ma
authors.forename: Min-Min
authors.initials: MM
authors.lastname: Fan
authors.forename: Shu-Lin
authors.initials: SL
authors.lastname: Peng
authors.forename: Li-Sheng
authors.initials: LS
authors.lastname: Ding
authors.forename: Sheng
authors.initials: S
authors.lastname: Zhang
authors.forename: Bang-Jing
authors.initials: BJ
authors.lastname: Li
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry; D048271:Chitosan / Q000138:chemical synthesis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008280:Magnetics; D054118:Nanospheres / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000138:chemical synthesis / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D047391:alpha-Cyclodextrins / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D001672:Biocompatible Materials; D011108:Polymers; D047391:alpha-Cyclodextrins; D011092:Polyethylene Glycols; D048271:Chitosan