Reversible Tuning of Plasmon Coupling in Gold Nanoparticle Chains Using Ultrathin Responsive Polymer Film
作者： Saide Z. Nergiz , Srikanth Singamaneni
DOI: 10.1021/AM200109R
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摘要: We demonstrate large and reversible tuning of plasmonic properties gold nanoparticles mediated by the breaking making linear branched chains adsorbed on an ultrathin (1 nm) responsive polymer film. Atomic force microscopy revealed that at pH below isoelectric point polybase (extended state chains), layer existed primarily as individual nanoparticles. On other hand, higher pH, transition from coil to globule (collapsed) state, resulting in formation with strong interparticle plasmon coupling. Reversible aggregation resulted change optical metal nanostructure assemblies. In particular, we observed a redistribution intensity between coupled bands shift (nearly 95 band pH. La...
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