NCs has been extensively described by Kim et al.46 (link) Briefly, Iron(III) acetylacetonate (0.71 g), Oleic acid
(1.27 g), benzyl ether (10.40 g), and 4-biphenylcarbocylic (0.41 g)
are mixed in a three neck flask, and then degassed by nitrogen gas
(1 h) before reaction. The mixture is heated up to 290 °C and
kept react for 30 min. The mixture is then cooled down and the produced
nanocubes can be precipitated by ethanol. A magnetic separator of
Dexter Magnetic Technologies Inc. (Elk Grove Village, IL) is employed
to remove supernatant. The purified nanocubes are resuspended in chloroform.
Iron(III) acetylacetonate, 4-biphenylcarboxylic acid, and benzyl ether
are from Thermo Fisher Scientific Inc. (Waltham, MA). Oleic acid is
obtained from Sigma-Aldrich Corp (St. Louis, MO).