Sculpturing patterns of plasmonic silver nanoprisms by means of photocatalytic lithography. (16th March 2017)

• Record Type: Journal Article
• Authors: Panzarasa, Guido; Soliveri, Guido; Marra, Gianluigi; Meda, Laura; Savoini, Alberto; Ardizzone, Silvia; Salvalaggio, Mario
• Is Part Of: Nanotechnology. Volume 28:Number 15(2017)
• Publication Date: 2017-03-16
• Subjects: photocatalytic lithography -- SERS -- silver nanoprisms -- titanium dioxide -- plasmonic nanoparticles; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aa631b
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: The controlled shaping of nanoparticles' morphology is one of the pillars of nanotechnology. Here, we demonstrate that photocatalytic lithography, a technique already proved to be useful in materials science, can act as a dry etching technique for noble metal nanoparticles. Triangular silver nanoprisms are self-assembled on titanium dioxide films and photocatalytically shaped into discoidal particles upon irradiation with near-UV light. The obtained patterned surfaces show a dramatically different surface-enhanced Raman scattering response, suggesting the utility of our approach for the development of sensors. The photocatalytic nature of the particle shaping is demonstrated and a plausible mechanism drawn by performing photocatalysis in different configurations (direct and remote) and by irradiating in different solvents.