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Issue 4, 2014
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Hybrid nanoparticles with CO2-responsive shells and fluorescence-labelled magnetic cores

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Abstract

CO2-responsive polymer poly(N,N-diethylaminoethylmethacrylate)-modified magnetic nanoparticles (Fe3O4@dye/SiO2–PDEAEMA) were synthesized by atom transfer radical polymerization from the surfaces of silica coated, dye-labelled iron oxide nanoparticles (Fe3O4@dye/SiO2). TEM, FT-IR, and TGA confirmed and quantified the grafted polymer brushes. The prepared magnetic nanoparticles (MNPs) were fluorescence labelled, as shown by the fluorescence spectra and fluorescence microscopy images. This indicated that the nanoparticles could be utilized as imaging probes to monitor the movement of biological cells or other systems. The PDEAEMA polymer brushes on the surface of MNPs endowed them with a protein adsorption ability. The polymer was also CO2-responsive, so it was a CO2-triggered reversible protein adsorption/release material, which was demonstrated by the bovine serum albumin (BSA) adsorption experiments. The results indicated that the reversible adsorption/release of protein by bubbling CO2 and N2 alternately was easy to achieve.

Graphical abstract: Hybrid nanoparticles with CO2-responsive shells and fluorescence-labelled magnetic cores

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Publication details

The article was received on 13 Sep 2013, accepted on 31 Oct 2013 and first published on 01 Nov 2013


Article type: Paper
DOI: 10.1039/C3TB21264E
Citation: J. Mater. Chem. B, 2014,2, 437-442
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    Hybrid nanoparticles with CO2-responsive shells and fluorescence-labelled magnetic cores

    J. Guo, N. Wang, J. Wu, Q. Ye, C. Zhang, X. Xing and J. Yuan, J. Mater. Chem. B, 2014, 2, 437
    DOI: 10.1039/C3TB21264E

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