Sculpturing patterns of plasmonic silver nanoprisms by means of photocatalytic lithography
| Autor: | Mario Salvalaggio, Silvia Ardizzone, Alberto Savoini, Guido Soliveri, Laura Meda, Guido Panzarasa, Gianluigi Marra |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanoparticle Bioengineering Nanotechnology 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences chemistry.chemical_compound General Materials Science Electrical and Electronic Engineering Lithography Plasmon Mechanical Engineering General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Mechanics of Materials Titanium dioxide engineering Photocatalysis Particle Noble metal Dry etching 0210 nano-technology |
| Zdroj: | Nanotechnology. 28(15) |
| ISSN: | 1361-6528 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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