la062891f_si_001.pdf (38.62 kB)
Two-Dimensional Nanoparticle Arrays Derived from Ferritin Monolayers
journal contribution
posted on 2007-05-08, 00:00 authored by Zhen Yuan, Dimiter N. Petsev, Brian G. Prevo, Orlin D. Velev, Plamen AtanassovA scalable technique for making silica coatings with embedded two-dimensional arrays of iron oxide nanoparticles
is presented. The iron oxide nanoparticle arrays were formed by depositing quasi-crystalline ferritin layers, an iron
storage protein with an iron oxide mineral core, on solid substrates by a spread-coating technique based on evaporation-induced convective assembly. The layer of protein molecular arrays was then encapsulated in a silica matrix film
deposited from a sol precursor. The organic protein shell of the ferritin molecules was then removed by controlled
pyrolysis, leaving ordered iron oxide cores bound in the silica matrix. This article is the first report on combining
convective self-assembly of proteins with sol−gel techniques of oxide film formation. The technique is technologically
feasible and scalable to make coatings of encapsulated ordered magnetic clusters tens of cm2 or larger in size.
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- Biochemistry
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Keywords
Ferritin MonolayersA scalable techniqueiron oxide nanoparticlesclusters tenssol precursorcm 2convectiveiron oxide mineral coresilica coatingsiron storage proteiniron oxide nanoparticle arraysprotein shellsilica matrixencapsulatedoxide film formationiron oxide coressilica matrix filmferritin molecules
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