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. Author manuscript; available in PMC: 2016 Mar 31.
Published in final edited form as: Langmuir. 2015 Mar 20;31(12):3612–3620. doi: 10.1021/acs.langmuir.5b00213

Figure 2.

Figure 2

Effect of iron concentration relative to tannic acid concentration on nanoparticle assembly. In a large excess of iron (3.1 mol excess relative to tannic acid) the dispersion appears purple indicating precipitates of iron and tannic acid and a micelle population is evident in the particle size distribution measured by dynamic light scattering. At lower iron concentrations, the dispersions appear red indicative of a tannic acid iron complex. Particle size decreases with increasing iron concentration.