Skip to main content
Kent Academic Repository

Mesoporous silica-magnetite nanocomposites: Fabrication, characterisation and applications in biosciences

Sen, Tapas, Bruce, Ian J. (2009) Mesoporous silica-magnetite nanocomposites: Fabrication, characterisation and applications in biosciences. Microporous and Mesoporous Materials, 120 (3). pp. 246-251. ISSN 1387-1811. (doi:10.1016/j.micromeso.2008.11.012) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:22812)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
http://dx.doi.org/10.1016/j.micromeso.2008.11.012

Abstract

Template assisted fabrication of magnetic mesoporous silica-magnetite nanocomposites and their performance in binding and elution of Salmon sperm DNA has been reported. The effect of reaction pH (10-2) during the fabrication of nanocomposites has been studied. All materials fabricated at various pH were characterised by XRD, TEM, MIR, nitrogen adsorption and magnetic susceptibility measurements. Fabrication at neutral pH (7) in the presence of a cationic surfactant (cetyl trimethyl ammonium bromide; CTAB) produced core-shell nanocomposites of quasi spherical and rod shaped morphologies with mesoporous (pore size similar to 3.5 nm) silica shell and rhombic magnetite core. Fabrication at alkaline pH (10) produced monolithic mesoporous silica composites with embedded magnetite nanoparticles. Fabrication at acidic pH (4 and 2) produced a biphasic mixture of rhombic magnetite and amorphous silica rods. A similar fabrication at acidic pH (2) in the absence of CTAB produced a biphasic mixture of rhombic magnetite and spherical silica nanoparticles. All materials exhibited a high value of Salmon sperm DNA binding at physiological pH whereas elution value of DNA was observed to be dependent on the extent of silica coating on magnetite nanoparticles.

Item Type: Article
DOI/Identification number: 10.1016/j.micromeso.2008.11.012
Uncontrolled keywords: Core-shell nanocomposites; Mesoporous silica-magnetite; Magnetic bioseparation
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Biosciences
Funders: European Commission (https://ror.org/00k4n6c32)
Depositing User: Suzanne Duffy
Date Deposited: 11 Sep 2009 13:30 UTC
Last Modified: 12 Jul 2022 10:39 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/22812 (The current URI for this page, for reference purposes)

University of Kent Author Information

Bruce, Ian J..

Creator's ORCID:
CReDIT Contributor Roles:
  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.