Superparamagnetic microspheres with controlled macroporosity generated in microfluidic devices

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DOIResolve DOI: http://doi.org/10.1021/am301304h
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TypeArticle
Journal titleACS Applied Materials & Interfaces
ISSN1944-8244
1944-8252
Volume4
Issue9
Pages49344941; # of pages: 8
Subjectmicrofluidic; superparamagnetic; porous; microparticles; assembly; magnetic separation
AbstractA microfluidic approach to preparing superparamagnetic microspheres with tunable porosity is described. In this method, droplets consisting of iron oxide nanoparticles, a functional polymer and solvent are formed in a microfluidic channel. The droplets are subsequently collected in solutions of sodium dodecyl sulfate (SDS) where the solvent is left to diffuse out of the droplet phase. By adjusting the concentration of the SDS and the polarity of the solvent of the dispersed phase, the porosity of the microparticles is controlled from non porous to porous structure. The formation of the pores is shown to depend on the rate at which solvent diffuses out of the droplet phase and the availability of SDS to adsorb at the droplet interface.
Publication date
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; Measurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21268899
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Record identifierfff33f85-804c-4cf0-afab-434efe095722
Record created2013-11-22
Record modified2016-05-09
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