Functional polymers possess combined physical, chemical and mechanical properties and functionalities taking advantage of their conductive, optical, electronic and biomedical features. Some functional polymers also reveal stimuli responsive properties that are subject to change upon exposure to external stimuli such as temperature, pH, and light. Perturbation of local environment can lead to change in polymer conformation, structure, and aggregated states that render them be used as smart materials. Polymer colloids allow further expansion of applications of functional polymers as they can be easily processed and adopted for conjugation with a variety of biomolecules. Hierarchical self-assemblies comprised of polymer colloids show applications as photonic materials with tunability simply by changing the size of the colloids. Recent studies also suggest that nanoscaled polymer colloids have similar application potentials as semiconducting quantum dots. In recent years, polymer colloids have emerged as one of the most promising materials due to their size and morphology -dependent properties, and the feasibility for chemical modification that allows exploration of emergent phenomena and commercial applications....