Table 1.

Overview of the synthesis parameters and characteristics of iron oxide nanocubes and nanospheres (n _{iron oleate} = 10 mmol).

Name	Reflux temperature (°C)	Heating rate (°C min−1)	Reflux time (min)	Oleic acid (mmol)	Sodium oleate (mmol)	Shape	Edge length/diameter and standard dev. (nm)
Reagent group A: 99% oleic acid, 97% sodium oleate
C094	315	3.0	30	2.145	0.715	Cubes	9.4 ± 0.4(4%)
C096	315	3.0	30	1.43	1.43	Cubes	9.6 ± 0.4 (4%)
C126	310	3.0	30	1.43	1.43	Cubes	12.6 ± 0.8 a (6%)
C136	319 b (315)	3.0	37	1.43	1.43	Cubes	13.6 ± 0.8 (6%)
C174	325	3.0	30	2.145	0.715	Cubes	17.4 ± 1.2 (7%)
C187	327	3.0	30	2.5	2.5	Cubes	18.7 ± 1.5 (8%)
C230	350	3.3	30	5	5	Cubes	23.0 ± 2.6 (11%)
S050	325	3.0	30	5	0	Spheres	5.3 ± 0.4 c (8%)
S157	327	3.0	30	5	0	Spheres	15.7 ± 1.7 (11%)
S270	350	3.3	30	10	0	Spheres	27.0 ± 2.0 (8%)
Reagent group B: 90% oleic acid, 82% sodium oleate
TC086	320	2.6	30	2.86	0	Cubes	8.6 ± 0.5 (6%)
S091	320	2.6	30	2.86	0	Spheres	9.1 ± 0.6 (7%)
PD820	320	2.2	30	2.86	0	Cubes	8–20 d

^aDeviating from size-trend.

^bSuperheated (no magnetic stirring).

^cArgon bubbling.

^dPolydisperse.