Plasmon-induced charge separation: chemistry and wide applications

Tatsuma, Tetsu; Nishi, Hidetaka; Ishida, Takuya

doi:10.1039/c7sc00031f

Cited by 210 publications

(220 citation statements)

References 119 publications

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“…In this way, the many opportunities afforded by plasmonic assemblies, that is, the formation of hot spots, optical magnetism, or Fano resonances among others, can be oriented to the development of novel optical transducers, biosensors, and therapeutic agents. In the present work, we extend the outstanding potential of reconfigurable plasmonic assemblies to the emerging field of plasmon‐induced photocatalysis …”

Section: Methodsmentioning

confidence: 99%

“…Noble metal nanoparticles have recently gained relevance as photosensitizers in photocatalytic processes given their ability to extend the optical operational range of large band gap semiconductors, such as TiO 2 , to a broader range of the electromagnetic spectrum . One of the main mechanisms behind this phenomenon arises from the ability of plasmonic nanomaterials to harvest visible and near‐infrared (NIR) photons efficiently, thus creating a population of excited “hot” electrons that can be transferred to a nearby semiconductor if both materials are combined to form a hybrid . Along these lines, the extent of such a photosensitization process is inversely proportional to the space separating both species .…”

Section: Methodsmentioning

confidence: 99%

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Traveling Hot Spots in Plasmonic Photocatalysis: Manipulating Interparticle Spacing for Real‐Time Control of Electron Injection

et al. 2018

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Herein, we introduce a novel approach to achieve real‐time control over the hot‐electron injection process in metal–semiconductor photocatalysts. Such functionality is attained through the design of a hybrid nanocomposite in which plasmonic Au nanorods and TiO2 nanoparticles are synergistically integrated with a thermoresponsive polymer. In this manner, modifying the temperature of the system allows 1) precise regulation of the interparticle distance between the catalyst and the plasmonic component and 2) the reversible formation of plasmonic hot spots on the semiconductor. Both features can be simultaneously exploited to modulate the injection of hot electrons, thus boosting/inhibiting at will the photocatalytic activity of these heterostructures. This innovative conception enables dynamically adjustable performance of semiconductors, hence opening the door to the development of a new generation of plasmon‐operated photocatalytic devices.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Traveling Hot Spots in Plasmonic Photocatalysis: Manipulating Interparticle Spacing for Real‐Time Control of Electron Injection

et al. 2018

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“…High absorption coefficient with tunable plasmon resonant frequency makes plasmonic NPs potentially useful as components in optoelectronic devices. Recently, plasmon‐induced charge separation (PICS), which involves uphill charge transfer from a resonant plasmonic nanoparticle to a semiconductor in direct contact through external photoelectric effect or direct interfacial charge transfer, has drawn considerable attention because it allows plasmonics to be used for many different applications …”

Section: Introductionmentioning

confidence: 99%

“…PICS has been applied to many different visible‐light‐driven photocatalytic reactions including oxidation of organic species such as alcohols, oxygen and hydrogen evolution from water, and even water splitting . Most of the PICS systems are based on plasmonic metal nanoparticles coupled with n‐type semiconductor (n‐M system) . The most typical one among the n‐M systems is a Au nanoparticle/TiO 2 (AuNP/TiO 2 ) system .…”

Section: Introductionmentioning

confidence: 99%

Visible‐Light‐Driven Plasmonic Photocatalysis Enhanced by Charge Accumulation

2019

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Plasmon‐induced charge separation (PICS) at the interface between a plasmonic material and semiconductor is employed to drive photocatalytic reactions for conversion and storage of solar energy. Most of the conventional photoelectrodes based on PICS have an n‐M type structure with an interface between n‐type semiconductor (typically TiO2) and plasmonic metal (typically Au) nanoparticles. Here we develop n‐M‐p type photoelectrodes by coating the TiO2/Au photoelectrode with Ni(OH)2 or CrOx, which can collect and store positive charges. Both of the photoelectrodes show efficient PICS under visible light and accumulate positive charges released from resonant Au nanoparticles. The accumulated charges can be used for oxidation of organic species such as ethanol in the dark. The TiO2/AuNP/Ni(OH)2 photoelectrode exhibits an oxygen evolution ability under visible light with a certain bias voltage.

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“…[1][2][3][4] The LSPR of plasmonic nanostructures can be visualized as an electromagnetic field coupled to the coherent oscillation of all conduction electrons. The interaction of incident light with the metallic surface can excite resonant collective oscillations of conduction electrons of noble metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrocatalysis via Boosted Separation of Hot Charge Carriers of Plasmonic Gold Nanoparticles Deposited on Reduced Graphene Oxide

Liao

Wang

et al. 2019

ChemElectroChem

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Plasmon enhancement in electrocatalysis was investigated on pure Au nanoparticles (AuNPs) and an AuNPs-reduced graphene oxide (AuNPs/rGO) hybrid. Upon localized surface plasmon resonance (LSPR) excitation, hot charge carriers (hot electrons and holes) generate on the AuNPs. In the experiments, hot holes were scavenged by glucose and hot electrons could be efficiently transferred to the external electric circuit under a potential bias, resulting in an observable current enhancement. Then, the hot electrons' transfer efficiency can be quantitatively compared by the increased current response.It was found that the current density increased more obviously on the AuNPs/rGO hybrid than on pure AuNPs upon light irradiation. Due to the excellent electron mobility of rGO and the perfect electron affinity capacity, the hot electrons generated on AuNPs are efficiently transferred to the closely contacted rGO, then flow into the external circuit, generating current. The present study highlights the role of rGO in improving the separation of hot charge carriers to promote photocatalytic reactions.[a] X.

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Plasmon-induced charge separation: chemistry and wide applications

Abstract: Electrons transfer from plasmonic nanoparticles to semiconductors by exploiting the energy of light, and this effect is applied to photovoltaics, photocatalysis, sensing, photochromisms, photoswitchable functionalities and nanofabrications.

Cited by 210 publications

References 119 publications

Traveling Hot Spots in Plasmonic Photocatalysis: Manipulating Interparticle Spacing for Real‐Time Control of Electron Injection

Traveling Hot Spots in Plasmonic Photocatalysis: Manipulating Interparticle Spacing for Real‐Time Control of Electron Injection

Visible‐Light‐Driven Plasmonic Photocatalysis Enhanced by Charge Accumulation

Enhanced Electrocatalysis via Boosted Separation of Hot Charge Carriers of Plasmonic Gold Nanoparticles Deposited on Reduced Graphene Oxide

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