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Controllable fabrication and characterization of biocompatible core-shell particles and hollow capsules as drug carrier
- Source :
-
Applied Surface Science . Oct2006, Vol. 252 Issue 24, p8724-8733. 10p. - Publication Year :
- 2006
-
Abstract
- Abstract: SiO2@CdSe core-shell particles were fabricated by controllable deposition CdSe nanoparticles on silica colloidal spheres. Step-wise coating process was tracked by the TEM and XRD measurements. In addition, SiO2@CdSe/polypyrrole(PPy) multi-composite particles were synthesized based on the as-prepared SiO2@CdSe particles by cationic polymerization. The direct electrochemistry of myoglobin (Mb) could be performed by immobilizing Mb on the surface of SiO2@CdSe particles. Immobilized with Mb, SiO2@CdSe/PPy-Mb also displayed good bioelectrochemical activity. It confirmed the good biocompatible property of the materials with protein. CdSe hollow capsules were further obtained as the removal of the cores of SiO2@CdSe spheres. Hollow and porous character of CdSe sub-meter size capsules made them becoming hopeful candidates as drug carriers. Doxorubicin, a typical an antineoplastic drug, was introduced into the capsules. A good sustained drug release behavior of the loading capsules was discovered via performing a release test in the PBS buffer (pH 7.4) solution at 310k. Furthermore, SiO2@CdSe/PPy could be converted to various smart hollow capsules via selectively removal of their relevant components. [Copyright &y& Elsevier]
- Subjects :
- *NANOPARTICLES
*SILICON compounds
*COATING processes
*ADDITION polymerization
Subjects
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 252
- Issue :
- 24
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 22580339
- Full Text :
- https://doi.org/10.1016/j.apsusc.2005.12.084