Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 46, Issue -, Pages 253-263Publisher
ELSEVIER
DOI: 10.1016/j.msec.2014.10.022
Keywords
Fe3O4@ZnO:Er3+,Yb3+@(beta-CD); Magnetic properties; Up-conversion luminescence; Microwave-triggered; Controlled drug release
Categories
Funding
- National Natural Science Foundation of China [21071115]
- Innovative and Entrepreneurial Training Program for the National College Students [201210697010]
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We constructed a novel core shell structured Fe3O4@ZnO:Er3+,Yb3+@(beta-CD) nanoparticles used as drug carrier to investigate the loading and controllable release properties of the chemotherapeutic drug etoposide (VP-16). The cavity of beta-cyclodextrin is chemically inert, it can store etoposide molecules by means of hydrophobic interactions. The Fe3O4 core and ZnO:Er3+,Yb3+ shell functioned successfully for magnetic targeting and upconversion fluorescence imaging, respectively. In addition, the ZnO:Er3+,Yb3+ shell acts as a good microwave absorber with excellent microwave thermal response property for microwave triggered drug release (the VP-16 release of 18% under microwave irradiation for 15 min outclass the 2% within 6 h without microwave irradiation release). The release profile could be controlled by the duration and number of cycles of microwave application. This material therefore promises to be a useful noninvasive, externally controlled drug-delivery system in cancer therapy. (C) 2014 Elsevier B.V. All rights reserved.
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