Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes
Nanostructured semiconductors feature resonant optical modes that confine light absorption in specific areas called “hot spots”. These areas can be used for localized extraction of the photogenerated charges, which in turn could drive chemical reactions for synthesis of catalytic materials. In this...
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doaj-9fd6e4c074d54cfd8c42bf934f07183d2020-11-24T20:46:35ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862018-08-01912097210510.3762/bjnano.9.1982190-4286-9-198Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodesEvgenia Kontoleta0Sven H. C. Askes1Lai-Hung Lai2Erik C. Garnett3Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, NetherlandsCenter for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, NetherlandsCenter for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, NetherlandsCenter for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, NetherlandsNanostructured semiconductors feature resonant optical modes that confine light absorption in specific areas called “hot spots”. These areas can be used for localized extraction of the photogenerated charges, which in turn could drive chemical reactions for synthesis of catalytic materials. In this work, we use these nanophotonic hot spots in vertical silicon nanowires to locally deposit platinum nanoparticles in a photo-electrochemical system. The tapering angle of the silicon nanowires as well as the excitation wavelength are used to control the location of the hot spots together with the deposition sites of the platinum catalyst. A combination of finite difference time domain (FDTD) simulations with scanning electron microscopy image analysis showed a reasonable correlation between the simulated hot spots and the actual experimental localization and quantity of platinum atoms. This nanophotonic approach of driving chemical reactions at the nanoscale using the optical properties of the photo-electrode, can be very promising for the design of lithography-free and efficient hierarchical nanostructures for the generation of solar fuels.https://doi.org/10.3762/bjnano.9.198catalystsnanomaterialsnanophotonicsphotodepositionsolar fuels |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Evgenia Kontoleta Sven H. C. Askes Lai-Hung Lai Erik C. Garnett |
spellingShingle |
Evgenia Kontoleta Sven H. C. Askes Lai-Hung Lai Erik C. Garnett Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes Beilstein Journal of Nanotechnology catalysts nanomaterials nanophotonics photodeposition solar fuels |
author_facet |
Evgenia Kontoleta Sven H. C. Askes Lai-Hung Lai Erik C. Garnett |
author_sort |
Evgenia Kontoleta |
title |
Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes |
title_short |
Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes |
title_full |
Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes |
title_fullStr |
Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes |
title_full_unstemmed |
Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes |
title_sort |
localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes |
publisher |
Beilstein-Institut |
series |
Beilstein Journal of Nanotechnology |
issn |
2190-4286 |
publishDate |
2018-08-01 |
description |
Nanostructured semiconductors feature resonant optical modes that confine light absorption in specific areas called “hot spots”. These areas can be used for localized extraction of the photogenerated charges, which in turn could drive chemical reactions for synthesis of catalytic materials. In this work, we use these nanophotonic hot spots in vertical silicon nanowires to locally deposit platinum nanoparticles in a photo-electrochemical system. The tapering angle of the silicon nanowires as well as the excitation wavelength are used to control the location of the hot spots together with the deposition sites of the platinum catalyst. A combination of finite difference time domain (FDTD) simulations with scanning electron microscopy image analysis showed a reasonable correlation between the simulated hot spots and the actual experimental localization and quantity of platinum atoms. This nanophotonic approach of driving chemical reactions at the nanoscale using the optical properties of the photo-electrode, can be very promising for the design of lithography-free and efficient hierarchical nanostructures for the generation of solar fuels. |
topic |
catalysts nanomaterials nanophotonics photodeposition solar fuels |
url |
https://doi.org/10.3762/bjnano.9.198 |
work_keys_str_mv |
AT evgeniakontoleta localizedphotodepositionofcatalystsusingnanophotonicresonancesinsiliconphotocathodes AT svenhcaskes localizedphotodepositionofcatalystsusingnanophotonicresonancesinsiliconphotocathodes AT laihunglai localizedphotodepositionofcatalystsusingnanophotonicresonancesinsiliconphotocathodes AT erikcgarnett localizedphotodepositionofcatalystsusingnanophotonicresonancesinsiliconphotocathodes |
_version_ |
1716812297742057472 |