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Self-Constructed Multiple Plasmonic Hotspots on an Individual Fractal to Amplify Broadband Hot Electron Generation

Wang, Xi (author)
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P.R. China; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Ministry of Education, Tianjin University, Tianjin 300350, P.R. China
Liu, Changxu (author)
Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, D-80539 München, Germany
Gao, Congcong (author)
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P.R. China
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Yao, Kaili (author)
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P.R. China
Mousavi Masouleh, Seyed Shayan (author)
Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
Berté, Rodrigo (author)
Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, D-80539 München, Germany
Ren, Haoran (author)
Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, D-80539 München, Germany
de S. Menezes, Leonardo (author)
Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, D-80539 München, Germany; Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife-PE, Brazil
Cortés, Emiliano (author)
Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, D-80539 München, Germany
Bicket, Isobel C. (author)
Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
Wang, Haiyu (author)
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P.R. China
Li, Ning (author)
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P.R. China
Zhang, Zhenglong (author)
School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710061, P R. China
Li, Ming (author)
School of Materials Science and Engineering, State Key Laboratory for Power Metallurgy, Central South University, Changsha, Hunan 410083, P.R. China
Xie, Wei (author)
Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, P.R. China
Yu, Yifu (author)
Department of Chemistry, School of Science, Institute of Molecular Plus, Tianjin University, Tianjin, 300072, P. R. China
Fang, Yurui (author)
Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, P.R. China
Zhang, Shunping (author)
School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China
Xu, Hongxing (author)
School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China; The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P.R. China
Vomiero, Alberto (author)
Luleå tekniska universitet,Materialvetenskap,Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, I-30172 Venezia Mestre, Italy
Liu, Yongchang (author)
State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science and Engineering, Tianjin University, Tianjin 300354, P.R. China
Botton, Gianluigi A. (author)
Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
Maier, Stefan A. (author)
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, D-80539 München, Germany; Department of Physics, Imperial College London, London SW7 2AZ, England
Liang, Hongyan (author)
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P.R. China; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Ministry of Education, Tianjin University, Tianjin 300350, P.R. China
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School of Materials Science and Engineering, Tianjin University, Tianjin 300350, PR. China; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Ministry of Education, Tianjin University, Tianjin 300350, P.R. China Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, D-80539 München, Germany (creator_code:org_t)
2021-06-11
2021
English.
In: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 15:6, s. 10553-10564
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Plasmonic nanoparticles are ideal candidates for hot-electron-assisted applications, but their narrow resonance region and limited hotspot number hindered the energy utilization of broadband solar energy. Inspired by tree branches, we designed and chemically synthesized silver fractals, which enable self-constructed hotspots and multiple plasmonic resonances, extending the broadband generation of hot electrons for better matching with the solar radiation spectrum. We directly revealed the plasmonic origin, the spatial distribution, and the decay dynamics of hot electrons on the single-particle level by using ab initio simulation, dark-field spectroscopy, pump–probe measurements, and electron energy loss spectroscopy. Our results show that fractals with acute tips and narrow gaps can support broadband resonances (400–1100 nm) and a large number of randomly distributed hotspots, which can provide unpolarized enhanced near field and promote hot electron generation. As a proof-of-concept, hot-electron-triggered dimerization of p-nitropthiophenol and hydrogen production are investigated under various irradiations, and the promoted hot electron generation on fractals was confirmed with significantly improved efficiency.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Keyword

dendritic fractal
broadband hot electron generation
plasmonic resonances
electron energy loss spectroscopy
plasmon-assisted photocatalysis
Experimentell fysik
Experimental Physics

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ref (subject category)
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