Controlled phase changes: Thermosensitive Au nanoparticles with tunable lower critical solution temperature have been prepared by coating the nanoparticles with a thermo- and pH-responsive hyperbranched polyelectrolyte. The globular, polyfunctional structure of the hyperbranched polymers offer new options to control phase-transition temperatures of the nanoparticles (see aggregation equilibrium in diagram).
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Shen et al. (2008) studied this question.
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