Fig. 5.2. Transmission electron micrographs
of maghemite g-Fe 2 O 3 nanoparticles prepared
by hydrolysis of Fe(III) salts in refluxing
propylene glycol in the presence of amine
capping agents. The nanoparticles are soluble
in toluene solutions of n-octylamine and, as a
result, display a tendency for superlattice selfassembly when concentrated (top) and to form
aligned arrays in the direction of the earth’s
magnetic field when dilute (bottom). The bars
are 20 nm. Reproduced from [42] with
permission from the Royal Society of
Chemistry.
5 Oxide Nanoparticles
100
of maghemite g-Fe 2 O 3 nanoparticles prepared
by hydrolysis of Fe(III) salts in refluxing
propylene glycol in the presence of amine
capping agents. The nanoparticles are soluble
in toluene solutions of n-octylamine and, as a
result, display a tendency for superlattice selfassembly when concentrated (top) and to form
aligned arrays in the direction of the earth’s
magnetic field when dilute (bottom). The bars
are 20 nm. Reproduced from [42] with
permission from the Royal Society of
Chemistry.
5 Oxide Nanoparticles
100