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Title: Fuel-free nanocap-like motors actuated under visible light
Author: Wang, Xu
Srdihar, Varum
Guo, Surong
Talebi, Nahid
Miguel López, Albert
Hahn, Kersten
van Aken, Peter A.
Sánchez Ordóñez, Samuel
Keywords: Nanotecnologia
Espectroscòpia d'electrons
Electron spectroscopy
Issue Date: 20-Jun-2018
Publisher: Wiley
Abstract: The motion of nanomotors triggered by light sources will provide new alternative routes to power nanoarchitectures without the need of chemical fuels. However, most light-driven nanomotors are triggered by UV-light, near infrared reflection, or laser sources. It is demonstrated that nanocap shaped Au/TiO2 nanomotors (175 nm in diameter) display increased Brownian motion in the presence of broad spectrum visible light. The motion results from the surface plasmon resonance effect leading to self-electrophoresis between the Au and TiO2 layers, a mechanism called plasmonic photocatalytic effect in the field of photocatalysis. This mechanism is experimentally characterized by electron energy loss spectroscopy, energy-filtered transmission electron microscopy, and optical video tracking. This mechanism is also studied in a more theoretical manner using numerical finite-difference time-domain simulations. The ability to power nanomaterials with visible light may result in entirely new applications for externally powered micro/nanomotors.
Note: Versió postprint del document publicat a:
It is part of: Advanced Functional Materials, 2018, vol. 28, num. 25, p. 1705862
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Appears in Collections:Publicacions de projectes de recerca finançats per la UE
Articles publicats en revistes (Institut de Bioenginyeria de Catalunya (IBEC))

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