10.1021/la062891f.s001
Zhen Yuan
Zhen
Yuan
Dimiter N. Petsev
Dimiter N.
Petsev
Brian G. Prevo
Brian G.
Prevo
Orlin D. Velev
Orlin D.
Velev
Plamen Atanassov
Plamen
Atanassov
Two-Dimensional Nanoparticle Arrays Derived from Ferritin
Monolayers
American Chemical Society
2007
Ferritin MonolayersA scalable technique
iron oxide nanoparticles
clusters tens
sol precursor
cm 2
convective
iron oxide mineral core
silica coatings
iron storage protein
iron oxide nanoparticle arrays
protein shell
silica matrix
encapsulated
oxide film formation
iron oxide cores
silica matrix film
ferritin molecules
2007-05-08 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Two_Dimensional_Nanoparticle_Arrays_Derived_from_Ferritin_Monolayers/3009073
A 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 cm<sup>2</sup> or larger in size.