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dc.contributor.authorBrossault, Daviden
dc.contributor.authorRouth, Alexen
dc.date.accessioned2020-02-15T00:31:00Z
dc.date.available2020-02-15T00:31:00Z
dc.date.issued2020-03en
dc.identifier.issn0021-9797
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/302243
dc.description.abstractHypothesis Porous magnetic silica beads are promising materials for biological and environmental applications due to their enhanced adsorption and ease of recovery. This work aims to develop a new, inexpensive and environmentally friendly approach based on agglomeration of nanoparticles in aqueous droplets. The use of an emulsion as a geometrical constraint is expected to result in the formation of spherical beads with tunable composition depending on the aqueous phase content. Experiments Magnetic silica beads are produced at room temperature by colloidal destabilization induced by addition of CaCl2 to a water-in-oil emulsion containing SiO2 and Fe3O4 nanoparticles. The impact of the salt concentration, emulsification method, concentration of hydrophobic surfactant as well as silica content is presented in this paper. Findings This method enables the production of spherical beads with diameters between 1 and 9 µm. The incorporation of magnetic nanoparticles inside the bead’s structure is confirmed using Energy Dispersive X-ray spectrometry (EDX) and Scanning Transmission Electron Microscopy (STEM) and results in the production of magnetic responsive beads with a preparation yield up to 84%. By incorporating the surfactant Span 80 in the oil phase it is possible to tune the roughness and porosity of the beads.
dc.description.sponsorshipW D Armstrong Studentship (internal Cambridge award)
dc.format.mediumPrint-Electronicen
dc.languageengen
dc.publisherElsevier BV
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleSalt-driven assembly of magnetic silica microbeads with tunable porosity.en
dc.typeArticle
prism.endingPage390
prism.publicationDate2020en
prism.publicationNameJournal of colloid and interface scienceen
prism.startingPage381
prism.volume562en
dc.identifier.doi10.17863/CAM.49317
dcterms.dateAccepted2019-12-07en
rioxxterms.versionofrecord10.1016/j.jcis.2019.12.032en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-03en
dc.contributor.orcidBrossault, David [0000-0002-3866-8239]
dc.contributor.orcidRouth, Alex [0000-0002-3443-3053]
dc.identifier.eissn1095-7103
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/P030467/1)
cam.orpheus.successTue Mar 31 10:37:04 BST 2020 - Embargo updated*
rioxxterms.freetoread.startdate2021-03-31


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Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's licence is described as Attribution-NonCommercial-NoDerivatives 4.0 International