Figure 3. Characterization of polymeric micelles.

(a) Small-angle neutron scattering (SANS) patterns of two types of polymeric micelle solutions with corresponding Guinier fits in the inset. Sample 1 solution was prepared by mixing 5 mg of PEO-b-PMMA, 0.6 ml of DMF, 1 ml of 40 mM Na₃RhCl₆ solution in H₂O, and 1.4 ml D₂O, while Sample 2 was prepared by mixing 5 mg of PEO-b-PMMA, 0.6 ml of DMF, and 1 ml of 40 mM Na₃RhCl₆ solution. (b,c) Typical TEM micrographs showing the polymeric micelles (b) before and (c) after the addition of Na₃RhCl₆ precursor (Scale bar, 50 nm). The polymeric micelles are stained with 1.0 wt% phosphotungstic acid. (d) UV-VIS-NIR spectra of different solutions: (i) DMF+Water, (ii) DMF+Water+Na₃RhCl₆, (iii) DMF+Water+PEO-b-PMMA and (iv) DMF+Water+PEO-b-PMMA+Na₃RhCl₆, respectively. [Note: to highlight the interactions among different compositions, UV-VIS-NIR spectra of low- and high- wavelengths were obtained at different composition concentrations: low concentration for low-wavelength, and high concentration for high-wavelength].