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The development of Au/AgI dimeric nanoparticles (NPs) is reported for highly selective colorimetric detection of hydrogen sulfide (H2S). The detection mechanism is designed by taking advantage of the chemical transformation of AgI to Ag2S upon reacting with sulfide, which leads to a shift in the plasmonic band of the attached Au NPs. The plasmonic shift is accompanied by a color change of the solution...
The warrior with a shield represents a unique Au–AgI dimeric nanostructure that is developed for sensitive and selective colorimetric detection of H2S. Upon attack by H2S, AgI (the shield) converts to Ag2S, inducing a plasmonic shift of the connected Au nanoparticle (the warrior). The Au nanoparticle changes its color depending on the concentration of the sulfide, thus enabling a naked‐eye readout,...
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