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(a) Scheme illustrating the formation of Au NRs-microgel composite particles using electrostatic interactions between the cationic charge carrying Au NRs and anionic microgel particles; (b) UV-Vis spectra of gold NRs prior to (solid line) and following NR incorporation in microgels i.e., composite particles (dash line). Inset is the absorbance peak and TEM image of seed solution. Scale bar is 5 nm; (c) FTIR spectra of the microgel, Au NRs and Au NRs-microgel composite.
