Table 1

Structural characterization of SIPPs
Value Description Units 18SIPP30 18SIPP60 16SIPP30 16SIPP60 14SIPP30 14SIPP60 12SIPP30 12SIPP60
L Chain length - 18 18 16 16 14 14 12 12
t Reflux time min 30 60 30 60 30 60 30 60
d Diameter nm 11.29 ± 3.22 7.20 ± 1.81 6.83 ± 1.34 5.14 ± 2.13 7.34 ± 1.22 6.14 ± 1.67 7.92 ± 1.29 7.34 ± 1.12
CV Coefficient of variation % 28.49 25.1 19.6 41.5 16.6 27.3 16.3 15.3
Vp Particle volume cm3 1.95 × 10−18 1.96 × 10−19 1.67 × 10−19 7.12 × 10−20 2.07 × 10−19 1.21 × 10−19 2.60 × 10−19 2.07 × 10−19
S Surface area cm2 7.55 × 10−12 1.63 × 10−12 1.47 × 10−12 8.31 × 10−13 1.69 × 10−12 1.19 × 10−12 1.97 × 10−12 1.69 × 10−12
Cp Suspension concentration mg/mL 9.33 ± 0.70 18.30 ± 0.00 5.36 ± 0.43 4.92 ± 0.13 4.29 ± 0.47 5.68 ± 0.43 3.22 ± 0.25 4.74 ± 0.40
CFe Iron concentration mg/mL 0.369 ± 0.001 0.315 ± 0.0009 0.163 ± 0.001 0.151 ± 0.001 0.214 ± 0.00007 0.210 ± 0.001 0.080 ± 0.0004 0.139 ± 0.0007
CPt Platinum concentration mg/mL 0.914 ± 0.001 1.068 ± 0.0007 0.332 ± 0.002 0.534 ± 0.002 0.583 ± 0.0003 0.692 ± 0.001 0.205 ± 0.0002 0.463 ± 0.0007
NaFe Iron atoms in 1.0 mL - 3.98 × 1018 3.40 × 1018 1.76 × 1018 1.63 × 1018 2.31 × 1018 2.26 × 1018 8.63 × 1017 1.50 × 1018
NSIPP Nanoparticles per milliliter SIPP/mL 1.04 × 1014 1.02 × 1015 4.96 × 1014 1.37 × 1015 5.90 × 1014 1.08 × 1015 1.71 × 1014 4.21 × 1014
AFe Atomic percent Fe at.% 58.5 50.8 63.1 49.8 56.2 51.4 57.7 51.1
APt Atomic percent Pt at.% 41.5 49.2 36.9 50.2 43.8 48.6 42.3 48.9
Fe/Pt Fe/Pt stoichiometry - 1.41 1.03 1.71 0.99 1.28 1.06 1.36 1.05
ρFePt Density g/cm3 14.0 14.0 14.0 14.0 14.0 14.0 14.0 14.0
mpFePt Mass per particle g 2.73 × 10−17 2.74 × 10−18 2.34 × 10−18 9.97 × 10−19 2.90 × 10−18 1.70 × 10−18 3.65 × 10−18 2.90 × 10−18
NaFePt Total Fe + Pt atoms per particle - 65,453 6,573 5,611 2,391 6,964 4,076 8,749 6,964
NpFe Iron atoms per particle - 38289.9 3339.1 3540.5 1190.9 3913.8 2095.3 5048.1 3558.6
NpPt Platinum atoms per particle - 27162.9 3234.0 2070.4 1200.5 3050.3 1981.1 3700.8 3405.4
WL Weight percent ligand wt.% 27.2 50.0 52.9 42.5 43.2 33.7 34.4 41.7
WFePt Weight percent naked FePt wt.% 72.8 50.0 47.1 57.5 56.8 66.3 65.6 58.3
NpL Number of ligands per mg SIPPs Ligand/mg SIPP 6.08 × 1017 1.12 × 1018 1.32 × 1018 1.06 × 1018 1.22 × 1018 9.52 × 1017 1.12 × 1018 1.36 × 1018
IFeOx Intensity of iron oxide peak (TGA) Deriv. wt.% °C 0.091 0.068 0.033 0.047 0.054 0.019 0.000 0.000

Taylor et al.

Taylor et al. Nanoscale Research Letters 2014 9:306   doi:10.1186/1556-276X-9-306

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