Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 18, Issue 34, Pages 4042-4049Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b807514j
Keywords
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Funding
- National Excellent Doctoral Dissertation of P. R. China [200323]
- National Basic Research Program [2007CB808000]
- New Century Excellent Talents in University (NCET)
- Jilin Provincial Science and Technology Bureau of Jilin Province [20070104]
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Microgels of chemically cross-linked poly(allylamine hydrochloride) (PAH) and dextran (named PAH-D) encapsulated with magnetic Fe3O4 and luminescent CdTe nanoparticles were successfully fabricated. The superparamagnetic Fe3O4 nanoparticles were firstly incorporated into PAH-D microgels by in situ synthesis of Fe3O4 nanoparticles in the presence of PAH-D microgels. CdTe nanocrystals with different emissions were then covalently attached to Fe3O4-functionalized PAH-D microgels through the coupling reaction of amine groups of PAH-D and carboxyl groups of CdTe nanocrystals. The successful fabrication of PAH-D microgels functionalized with Fe3O4 and CdTe nanoparticles (Fe3O4&CdTe@PAH-D) was verified by the luminescence of the microgels and their simultaneous manipulation by an external magnetic field. Fe3O4&CdTe@PAH-D microgels have the capability to load a model drug, methyl orange, and release it in a sustainable way because of free amine groups in the corresponding PAH-D microgels. The magnetic and luminescent PAH-D microgels with loading capacity are expected to be widely useful as carriers for magnetic separation and drug delivery followed by luminescent detection.
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