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oai:recercat.cat:2445/1234862025-11-19T10:45:15Zcom_2072_1057col_2072_478902col_2072_478917

Fuel-free nanocap-like motors actuated under visible light Wang, Xu Srdihar, Varum Guo, Surong Talebi, Nahid Miguel López, Albert Hahn, Kersten van Aken, Peter A. Sánchez Ordóñez, Samuel Nanotecnologia Espectroscòpia d'electrons Nanotechnology Electron spectroscopy 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. 2018-07-11T13:43:06Z 2019-01-15T06:10:21Z 2018-06-20 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Versió postprint del document publicat a: http://dx.doi.org/10.1002/adfm.201705862 Advanced Functional Materials, 2018, vol. 28, num. 25, p. 1705862 http://dx.doi.org/10.1002/adfm.201705862 info:eu-repo/grantAgreement/EC/FP7/311529/EU//LT-NRBS info:eu-repo/grantAgreement/EC/FP7/222639/EU//ETHERPATHS (c) Wiley, 2018 info:eu-repo/semantics/openAccess Wiley Articles publicats en revistes (Institut de Bioenginyeria de Catalunya (IBEC))