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(a) Concentration of not-settled negatively charged 100 nm diameter gold nanoparticles in water at 23°C (black squares) and 37°C (red diamonds) over time together with predictions (lines) from the proposed modified Mason–Weaver model, and inset (b) UV–visible absorption spectra of nanoparticle solutions at the beginning of the experiment (dashed line) and after 240 min for solutions kept at 23°C (black line) and at 37°C (red line).
