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Silver is the ideal material for plasmonics because of its low loss at optical frequencies, though it is often replaced by a lossier metal, gold. This is because of silver’s tendency to tarnish, an effect which is enhanced at the nanoscale due to the large surface-to-volume ratio. Despite chemical tarnishing of Ag nanoparticles (NPs) has been extensively studied for decades, it has not been well understood whether resulted by sulfidation or oxidation processes. This intriguing quest is herein rationalized by studying the atmospheric corrosion of electron beam lithography-fabricated Ag NPs, through nanoscale investigation performed by high-resolution transmission electron microscopy (HRTEM) combined with electron energy loss (EEL) and energy dispersive X-ray (EDX) spectroscopies. We demonstrate that tarnishing of Ag NPs upon exposure to indoor air of an environment located inside a rural site, not particularly …
American Chemical Society
Publication date: 
27 Oct 2016

Mario Scuderi, Marco Esposito, Francesco Todisco, Daniela Simeone, Iolena Tarantini, Luisa De Marco, Milena De Giorgi, Giuseppe Nicotra, Luigi Carbone, Daniele Sanvitto, Adriana Passaseo, Giuseppe Gigli, Massimo Cuscunà

Biblio References: 
Volume: 120 Issue: 42 Pages: 24314-24323
The Journal of Physical Chemistry C