Theoretical Analysis of Metallic-Nanodimer Thermoplasmonics for Phototactic Nanoswimmers
| Autor: | Raúl A. Bustos-Marún, Nicolás Passarelli, Andrés I. Bertoni |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics media_common.quotation_subject FOS: Physical sciences Nanoparticle Ray Asymmetry Nanomaterials Metal Wavelength Chemical physics visual_art Mesoscale and Nanoscale Physics (cond-mat.mes-hall) visual_art.visual_art_medium Phototaxis General Materials Science Diffusion (business) media_common |
| Zdroj: | ACS Applied Nano Materials. 3:1821-1829 |
| ISSN: | 2574-0970 |
| DOI: | 10.1021/acsanm.9b02505 |
| Popis: | We assess the potentiality of several geometries of metallic nanodimers (one of the simplest thermoplasmonic systems) as candidates for active particles (nanoswimmers) propelled and controlled by light (phototaxis). The studied nanodimers are formed by two spherical nanoparticles of gold, silver, or copper with radii ranging from 20 to 100 nm. Contrary to most proposals, which assume the asymmetry of the systems as a requirement for self-propulsion, our results show that nanodimers made of identical nanoparticles are excellent candidates for phototactic self-thermophoretic systems. Nonsymmetrical nanodimers, although having a tunable effective diffusion, possess much lower or zero average thermophoretic forces. We show that the effective diffusion and the net thermophoretic force in both types of systems depend strongly on the wavelength of the incident light, which makes these properties highly tunable. Our study may be useful for the design of simple-to-make but controllable self-propelled nanoparticles. This can find numerous applications ranging from autonomous drug-carrying to controlling the self-assembly of complex nanomaterials. |
| Databáze: | OpenAIRE |
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