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Intraparticle transport and release of dextran in silica spheres with cylindrical mesopores
RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, YKI – Ytkemiska institutet.
Vise andre og tillknytning
2010 (engelsk)Inngår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 26, nr 1, s. 466-470Artikkel i tidsskrift (Fagfellevurdert)
Abstract [en]

The transport of oligomeric molecules in silica spheres with cylindrical mesopores has been quantified and related to the structural features of the spherical particles and the interactions at the solid-liquid interface. An emulsion-solvent evaporation method was used to produce silica spheres having cylindrical mesopores with an average pore diameter of 6.5 nm. The transport of dextran molecules (fluorescently tagged) with molecular weights of 3000 and 10 000 g/mol was quantified using confocal laser scanning microscopy (CLSM). The intraparticle concentration profiles in the dextrancontaining spheres were flat at all times, suggesting that the release is not isotropic and not limited by diffusion. The release of dextran into the solution is characterized by an initial burst, followed by long-term sustained release. The release follows a logarithmic time dependency, which was rationalized by coupling concentration-dependent effective diffusion constants with adsorption/desorption.

sted, utgiver, år, opplag, sider
2010. Vol. 26, nr 1, s. 466-470
Emneord [en]
Intraparticle transport and release of dextran in silica spheres with cylindrical mesopores
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Identifikatorer
URN: urn:nbn:se:ri:diva-27109DOI: 10.1021/la902092eOAI: oai:DiVA.org:ri-27109DiVA, id: diva2:1054113
Merknad
A2035Tilgjengelig fra: 2016-12-08 Laget: 2016-12-08 Sist oppdatert: 2020-12-01bibliografisk kontrollert

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