TY - JOUR
T1 - Magnetite 3D colloidal crystals formed in the early solar system 4.6 billion years ago
AU - Nozawa, Jun
AU - Tsukamoto, Katsuo
AU - Van Enckevort, Willem
AU - Nakamura, Tomoki
AU - Kimura, Yuki
AU - Miura, Hitoshi
AU - Satoh, Hisao
AU - Nagashima, Ken
AU - Konoto, Makoto
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/6/15
Y1 - 2011/6/15
N2 - Three-dimensional colloidal crystals made of ferromagnetic particles, such as magnetite (Fe3O4), cannot be synthesized in principle because of the strong attractive magnetic interaction. However, we discovered colloidal crystals composed of polyhedral magnetite nanocrystallites of uniform size in the range of a few hundred nanometers in the Tagish Lake meteorite. Those colloidal crystals were formed 4.6 billion years ago and thus are much older than natural colloidal crystals on earth, such as opals, which formed about 100 million years ago.(1)We found that the size of each individual magnetite particle determines its morphology, which in turn plays an important role in deciding the packing structure of the colloidal crystals. We also hypothesize that each particle has a flux-closed magnetic domain structure, which reduces the interparticle magnetic force significantly.
AB - Three-dimensional colloidal crystals made of ferromagnetic particles, such as magnetite (Fe3O4), cannot be synthesized in principle because of the strong attractive magnetic interaction. However, we discovered colloidal crystals composed of polyhedral magnetite nanocrystallites of uniform size in the range of a few hundred nanometers in the Tagish Lake meteorite. Those colloidal crystals were formed 4.6 billion years ago and thus are much older than natural colloidal crystals on earth, such as opals, which formed about 100 million years ago.(1)We found that the size of each individual magnetite particle determines its morphology, which in turn plays an important role in deciding the packing structure of the colloidal crystals. We also hypothesize that each particle has a flux-closed magnetic domain structure, which reduces the interparticle magnetic force significantly.
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U2 - 10.1021/ja2005708
DO - 10.1021/ja2005708
M3 - Article
C2 - 21563777
AN - SCOPUS:79958781901
VL - 133
SP - 8782
EP - 8785
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 23
ER -