Journal of Nanoparticle Research

, Volume 13, Issue 12, pp 6613–6620 | Cite as

Mesoporous silica-coated superparamagnetic particles prepared by pseudomorphic transformation and their application in purification of plasmid DNA

Research Paper


Mesoporous silica-coated superparamagnetic particles were prepared via pseudomorphic transformation of pre-made amorphous silica-coated Fe3O4–polymer composite particles using n-cetyltrimethylammonium bromide (CTAB) and 1,3,5-trimethyl benzene (MES) as template. The mesoporous particles presented almost the same size, shape, and magnetic property as the original amorphous particles but an ordered mesoporous shell with wormhole-like pore structure. The pore size of the shells increased from 2.4 to 3.1 and 4.2 nm as the molar ratio of MES/CTAB increased from 0 to 1.0 and 1.5. DNA extraction experiments showed the mesoporous particles were qualified for purification of plasmid DNA from bacterial lysate.

Graphical abstract


Silica Mesoporous Superparamagnetic Pseudomorphic transformation DNA Nanomedicine 



This study was supported by National Basic Research Program of China (No. 2011CB935800) and the National Nature Science Foundation of China (No. 51072064, 50825202).


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.State Key Laboratory of Supramolecular Structures and Materials, College of ChemistryJilin UniversityChangchunPeople’s Republic of China
  2. 2.Department of Andrology, The First HospitalJilin UniversityChangchunPeople’s Republic of China
  3. 3.College of Chemistry and Resources EnvironmentLinyi Normal UniversityLinyiPeople’s Republic of China

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