Articles producció científica> Química Física i Inorgànica

Balancing Near-Field Enhancement and Hot Carrier Injection: Plasmonic Photocatalysis in Energy-Transfer Cascade Assemblies

  • Identification data

    Identifier: imarina:9330681
    Authors:
    Negrín-Montecelo, YGeneidy, AHAGovorov, AOAlvarez-Puebla, RABesteiro, LVCorrea-Duarte, MA
    Abstract:
    Photocatalysis stands as a very promising alternative to photovoltaics in exploiting solar energy and storing it in chemical products through a single-step process. A central obstacle to its broad implementation is its low conversion efficiency, motivating research in different fields to bring about a breakthrough in this technology. Using plasmonic materials to photosensitize traditional semiconductor photocatalysts is a popular strategy whose full potential is yet to be fully exploited. In this work, we use CdS quantum dots as a bridge system, reaping energy from Au nanostructures and delivering it to TiO2 nanoparticles serving as catalytic centers. The quantum dots can do this by becoming an intermediate step in a charge-transfer cascade initiated in the plasmonic system or by creating an electron-hole pair at an improved rate due to their interaction with the enhanced near-field created by the plasmonic nanoparticles. Our results show a significant acceleration in the reaction upon combining these elements in hybrid colloidal photocatalysts that promote the role of the near-field enhancement effect, and we show how to engineer complexes exploiting this approach. In doing so, we also explore the complex interplay between the different mechanisms involved in the photocatalytic process, highlighting the importance of the Au nanoparticles’ morphology in their photosensitizing capabilities.
  • Others:

    Author, as appears in the article.: Negrín-Montecelo, Y; Geneidy, AHA; Govorov, AO; Alvarez-Puebla, RA; Besteiro, LV; Correa-Duarte, MA
    Department: Química Física i Inorgànica
    URV's Author/s: Alvarez Puebla, Ramon Angel
    Keywords: Quantum dots Plasmonics Photocatalysis Nanostructures Hot electrons Field enhancement
    Abstract: Photocatalysis stands as a very promising alternative to photovoltaics in exploiting solar energy and storing it in chemical products through a single-step process. A central obstacle to its broad implementation is its low conversion efficiency, motivating research in different fields to bring about a breakthrough in this technology. Using plasmonic materials to photosensitize traditional semiconductor photocatalysts is a popular strategy whose full potential is yet to be fully exploited. In this work, we use CdS quantum dots as a bridge system, reaping energy from Au nanostructures and delivering it to TiO2 nanoparticles serving as catalytic centers. The quantum dots can do this by becoming an intermediate step in a charge-transfer cascade initiated in the plasmonic system or by creating an electron-hole pair at an improved rate due to their interaction with the enhanced near-field created by the plasmonic nanoparticles. Our results show a significant acceleration in the reaction upon combining these elements in hybrid colloidal photocatalysts that promote the role of the near-field enhancement effect, and we show how to engineer complexes exploiting this approach. In doing so, we also explore the complex interplay between the different mechanisms involved in the photocatalytic process, highlighting the importance of the Au nanoparticles’ morphology in their photosensitizing capabilities.
    Thematic Areas: Química Physics, condensed matter Physics, applied Optics Nanoscience & nanotechnology Materials science, multidisciplinary Materiais Engenharias iv Engenharias iii Engenharias ii Electronic, optical and magnetic materials Electrical and electronic engineering Biotechnology Atomic and molecular physics, and optics Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: ramon.alvarez@urv.cat
    Author identifier: 0000-0003-4770-5756
    Record's date: 2024-08-03
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://pubs.acs.org/doi/full/10.1021/acsphotonics.3c00733
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Acs Photonics. 10 (9): 3310-3320
    APA: Negrín-Montecelo, Y; Geneidy, AHA; Govorov, AO; Alvarez-Puebla, RA; Besteiro, LV; Correa-Duarte, MA (2023). Balancing Near-Field Enhancement and Hot Carrier Injection: Plasmonic Photocatalysis in Energy-Transfer Cascade Assemblies. Acs Photonics, 10(9), 3310-3320. DOI: 10.1021/acsphotonics.3c00733
    Article's DOI: 10.1021/acsphotonics.3c00733
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2023
    Publication Type: Journal Publications
  • Keywords:

    Atomic and Molecular Physics, and Optics,Biotechnology,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Materials Science, Multidisciplinary,Nanoscience & Nanotechnology,Optics,Physics, Applied,Physics, Condensed Matter
    Quantum dots
    Plasmonics
    Photocatalysis
    Nanostructures
    Hot electrons
    Field enhancement
    Química
    Physics, condensed matter
    Physics, applied
    Optics
    Nanoscience & nanotechnology
    Materials science, multidisciplinary
    Materiais
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Electronic, optical and magnetic materials
    Electrical and electronic engineering
    Biotechnology
    Atomic and molecular physics, and optics
    Astronomia / física
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