TY - JOUR
T1 - Shape Evolution of Single-Crystalline Iron Oxide Nanocrystals
AU - Cheon, Jinwoo
AU - Kang, Nam Jung
AU - Lee, Sang Min
AU - Lee, Jae Hyun
AU - Yoon, Ji Hyun
AU - Oh, Sang Jun
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2004/2/25
Y1 - 2004/2/25
N2 - Shape- and size-controlled synthesis of single-crystalline maghemite (γ-Fe2O3) nanocrystals are performed by utilizing a solution-based one-step thermolysis method. Modulating the growth parameters, such as the type and amount of capping ligands as well as the growth time, is shown to have a significant effect on the overall shape and size of the obtained nanocrystals and on the ripening process itself. The resulting shapes of the novel structures are diverse, including slightly faceted spheres, diamonds, prisms, and hexagons, all of which are in fact truncated dodecahedron structures with different degrees of truncation along the {111}, {110}, or {100} faces. Spherical nanocrystals are easily assembled into the three-dimensional superlattices, demonstrating the uniformity of these nanocrystals. The size-dependent magnetic properties are examined, and large hexagon-shaped γ-Fe2O3 nanocrystals are shown to be ferrimagnetic at room temperature.
AB - Shape- and size-controlled synthesis of single-crystalline maghemite (γ-Fe2O3) nanocrystals are performed by utilizing a solution-based one-step thermolysis method. Modulating the growth parameters, such as the type and amount of capping ligands as well as the growth time, is shown to have a significant effect on the overall shape and size of the obtained nanocrystals and on the ripening process itself. The resulting shapes of the novel structures are diverse, including slightly faceted spheres, diamonds, prisms, and hexagons, all of which are in fact truncated dodecahedron structures with different degrees of truncation along the {111}, {110}, or {100} faces. Spherical nanocrystals are easily assembled into the three-dimensional superlattices, demonstrating the uniformity of these nanocrystals. The size-dependent magnetic properties are examined, and large hexagon-shaped γ-Fe2O3 nanocrystals are shown to be ferrimagnetic at room temperature.
UR - http://www.scopus.com/inward/record.url?scp=1242297050&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1242297050&partnerID=8YFLogxK
U2 - 10.1021/ja038722o
DO - 10.1021/ja038722o
M3 - Article
C2 - 14971924
AN - SCOPUS:1242297050
VL - 126
SP - 1950
EP - 1951
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 7
ER -