Plasmoelectric Potential in Plasmon-Mediated Electrochemistry

Ou, Weihui; Fan, Yulong; Shen, Junda; Xu, Yunkun; Huang, Dongqing; Zhou, Binbin; Lo, Tsz Wing; Li, Shengliang; Li, Yang Yang; Lei, Dangyuan; J, Lu

doi:10.1021/acs.nanolett.2c01035

Cited by 15 publications

(50 citation statements)

References 41 publications

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“…LSPRs can also decay through a plasmoelectric potential, this is another type of nonradiative decay. 6 This LSPR decay method is not present in this thesis since a plasmoelectric material is required. A plasmoelectric material is composed of metal nanoparticles resting on a metal surface, the metal surface can be a metal plate or an electrode.…”

Section: Localized Surface Plasmon Resonancementioning

confidence: 99%

“…A plasmoelectric material is composed of metal nanoparticles resting on a metal surface, the metal surface can be a metal plate or an electrode. 6 A plasmoelectric potential involves the transfer of an electron from the metal surface to the nanostructure, this occurs when a plasmoelectric material is illuminated with light. 6 The slides used in this thesis consist of nanoparticles resting on a polystyrene coated glass slide.…”

Section: Localized Surface Plasmon Resonancementioning

confidence: 99%

“…6 A plasmoelectric potential involves the transfer of an electron from the metal surface to the nanostructure, this occurs when a plasmoelectric material is illuminated with light. 6 The slides used in this thesis consist of nanoparticles resting on a polystyrene coated glass slide.…”

Section: Localized Surface Plasmon Resonancementioning

confidence: 99%

“…33 This section investigates the separation of thermal and non-thermal effects from LSPR decay by studying partial currents. 6 There are two nonthermal effects and one thermal effect associated with the decay of localized surface plasmon resonances, all three of these effects can assist chemical reactions. 6 The nonthermal effects include hot electron generation and plasmoelectric potential, while the thermal effect is photothermal heating.…”

Section: Separating Thermal and Hot Electron Photocatalytic Contribut...mentioning

confidence: 99%

“…6 There are two nonthermal effects and one thermal effect associated with the decay of localized surface plasmon resonances, all three of these effects can assist chemical reactions. 6 The nonthermal effects include hot electron generation and plasmoelectric potential, while the thermal effect is photothermal heating. 6 A common challenge in the field of photocatalysis is determining the individual contributions each effect has on a chemical reaction; however, one method has been developed to analyze each individual contribution from each effect.…”

Section: Separating Thermal and Hot Electron Photocatalytic Contribut...mentioning

confidence: 99%

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Studying the Generation of Hot Electrons in Plasmonic Nanoparticle Monolayers

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Hot electrons are generated from the decay of LSPR modes. Surface-enhanced Raman spectroscopy is used to monitor hot electron generation using a dehalogenation reaction. In this thesis, Ag, Au, and AuAg nanoparticle substrates were produced and coated with halogenated thiophenols. The dipole and coupled LSPR modes associated with the nanoparticle substrate both generate hot electrons under illumination. The hot electron yield was determined for each LSPR modes. It was found that the dipole LSPR mode produced a larger yield of hot electrons than the coupled LSPR mode. The enhanced hot electron yield for the dipole mode was reported for both Ag-slides and AuAg-slides; additionally, the same result was obtained for both halogenated thiophenols. This work shows that the dipole LSPR mode is more suitable for the generation of hot electron than the coupled mode. Additional work is required to make the coupled LSPR mode an efficient hot electron generator.

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Section: Localized Surface Plasmon Resonancementioning

confidence: 99%

Section: Localized Surface Plasmon Resonancementioning

confidence: 99%

Section: Localized Surface Plasmon Resonancementioning

confidence: 99%

Section: Separating Thermal and Hot Electron Photocatalytic Contribut...mentioning

confidence: 99%

Section: Separating Thermal and Hot Electron Photocatalytic Contribut...mentioning

confidence: 99%

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Studying the Generation of Hot Electrons in Plasmonic Nanoparticle Monolayers

Baril¹

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Anionic Solid Solution MXene for Low‐Dosage NIR‐II Tumor Photothermal Therapy

Tang,

Zhu,

Duan

et al. 2023

Adv Funct Materials

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Due to the deep biological penetrability and therapeutic depth, the photothermal therapy over second near‐infrared region (NIR‐II) is booming against deep‐seated tumors. Intensive endeavors are committed to looking for suitable photothermal agents (PTAs), but the progress seems not so satisfied toward the choice of PTA dosage. Herein, a comprehensive parameter, incident photon‐to‐thermal conversion coefficient (IPTCE), is used to evaluate the overall conversion of PTAs at different dosage, which will benefit for determining the optimized dosage of PTAs in pursuit of complete healing together with reduced long‐term damages of nanodrugs. To prove the possibility, a series of anionic solid solution MXenes are chosen as hosts due to their versatile chemical compositions and correspondingly tunable light response. By deconvoluting fundamental structure–composition–property relationships, anionic regulation with extra electron injection leads to tunable free carrier densities and enhanced NIR‐II harvesting. Ti3C1.23N0.77 with high‐level nitrogen exhibits extraordinary extinction coefficient (43.5 L g−1 cm−1) than other MXenes. The parameter of IPTCE can guide the choice of PTA concentration for complete photothermal healing in vitro and vivo. This proof‐of‐principle demonstration highlights synthetically tailoring of the light harvesting over NIR‐II biowindow for a given host material by anionic regulation and further optimizes tumor photothermal therapy at low dose.

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Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

Bagnall,

Ganguli,

Sekretareva

2023

Angewandte Chemie

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It is now widely accepted that certain effects arising from localised surface plasmon resonance, such as enhanced electromagnetic fields, hot carriers, and thermal effects, can facilitate electrocatalytic processes. This newly emerging field of research is commonly referred to as plasmon‐enhanced electrocatalysis (PEEC) and is attracting increasing interest from the research community, particularly regarding harnessing the high energy of hot carriers. However, this has led to a lack of critical analysis in the literature, where the participation of hot carriers is routinely claimed due to their perceived desirability, while the contribution of other effects is often not sufficiently investigated. As a result, correctly differentiating between the possible mechanisms at play has become a key point of contention. In this review, we specifically focus on the mechanisms behind photocurrents observed in PEEC and critically evaluate the possibility of alternative sources of current enhancement in the reported PEEC systems. Furthermore, we present guidelines for the best experimental practices and methods to distinguish between the various enhancement mechanisms in PEEC.

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Plasmoelectric Potential in Plasmon-Mediated Electrochemistry

Cited by 15 publications

References 41 publications

Studying the Generation of Hot Electrons in Plasmonic Nanoparticle Monolayers

Studying the Generation of Hot Electrons in Plasmonic Nanoparticle Monolayers

Anionic Solid Solution MXene for Low‐Dosage NIR‐II Tumor Photothermal Therapy

Hot or Not? Reassessing Mechanisms of Photocurrent Generation in Plasmon‐Enhanced Electrocatalysis

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