Surface Reactions of Hot Electrons at Metal—Liquid Interfaces

Diesing, Detlef; Kritzler, Guido; Otto, A.

doi:10.1007/3-540-44817-9_12

Cited by 8 publications

(13 citation statements)

References 76 publications

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“…2,3 Nonetheless, photochemistry mediated by hot metallic carriers has been extensively studied in high vacuum surface science experiments, 2,4−6 and hot carrier photochemistry at metal electrodes has also been reported. 7,8 Additional examples of hot carrier photochemistry come from surface-enhanced Raman spectroscopy (SERS). In SERS, Raman scattering from molecules adsorbed on noble metal nanoparticles or roughened surfaces is enhanced by orders of magnitude.…”

Section: ■ Introductionmentioning

confidence: 99%

The Role of Photon Energy and Semiconductor Substrate in the Plasmon-Mediated Photooxidation of Citrate by Silver Nanoparticles

Thrall

Steinberg

et al. 2013

J. Phys. Chem. C

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The plasmon-mediated photooxidation of citrate ions adsorbed on silver (Ag) nanoparticle−semiconductor electrodes is studied in a photoelectrochemical cell. Consistent with previous reports, a negative photovoltage and an anodic photocurrent arise from citrate photooxidation under weak visible light illumination. We measure the wavelength dependence of this reaction for three different types of Ag nanoparticles and find that both the photovoltage and photocurrent increase with photon energy over the visible spectral range. The electrode photoresponse does not closely track the localized surface plasmon resonance of the Ag nanoparticles. We also explore the role of the semiconductor substrate in this reaction, and we find a similar electrode photoresponse for several different substrates. The strong dependence of reaction rate on photon energy is consistent with a hot-carrier photochemical process where photoexcited hot holes generated in the Ag nanoparticles are responsible for the oxidation of adsorbed citrate.

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Section: ■ Introductionmentioning

confidence: 99%

The Role of Photon Energy and Semiconductor Substrate in the Plasmon-Mediated Photooxidation of Citrate by Silver Nanoparticles

Thrall

Steinberg

et al. 2013

J. Phys. Chem. C

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“…The energy of the tunneling electrons can be controlled by applying a voltage between the metals. This situation, with regards to hot electron distribution at the interface, is very similar to photoelectrochemistry, which has led some authors to state that these kind of devises allow "surface photoelectrochemistry without photons" [94]. To the best of our knowledge, metal/insulator/metal-electrodes have only ever been used in one HECL article, as they are considerably more difficult to manufacture than simple metal (or semiconductor)/insulator-type electrodes that will be discussed next in greater detail [95].…”

Section: Generation Of Hydrated Electrons By Electrochemical Meansmentioning

confidence: 89%

Immunoassay of β 2 -microglobulin at oxide-coated heavily doped p-silicon electrodes

Håkansson

Salminen

Kuosmanen

et al. 2016

Journal of Electroanalytical Chemistry

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“…ªActivationº of the silver electrode of the MIM junction by a weak oxidation reduction cycle does not change the integrated photoyield per tunnel current (see Section 4 of [10] and Ref. [18]), whereas this procedure is very important in hot electron chemistry [17]. Therefore we are allowed to compare and discuss the results described in this article with the theory of the threshold excitation at smooth surfaces.…”

Section: Light Emission From Mim Junctions Via Intermediate Surface Pmentioning

confidence: 90%

“…[21,18]. Figure 4 gives the cross section and the relevant electronic levels for aluminium±aluminiumoxide±silver junctions produced on glass substrates, the oxide film grown under oxygen exposure of an aluminium film evaporated in UHV.…”

Section: Methodsmentioning

confidence: 99%

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Sensitive Linear Surface Optics with Metal–Insulator–Metal Tunnel Contacts

Otto

Diesing

Schatteburg

et al. 1999

phys. stat. sol. (a)

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Aluminium–aluminiumoxide–silver tunnel junctions allow to measure light emission by hot electrons and internal photoemission. Adsorption of potassium or oxygen on the silver electrode increases or quenches the light emission considerably. The light intensity increases at negative surface charge on the silver electrode and is suppressed at positive surface charge. Surprisingly, the light emission by hot electrons within the optical skin depth is negligible. The observed intensity is assigned to electron–photon coupling at the surface, especially to inverse photoemission by hot electrons via the time inverted threshold effect postulated by A. Liebsch. This is not in contradiction to time resolved two photon photoemission experiments. Internal photoemission experiments corroborate this interpretation.

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Surface Reactions of Hot Electrons at Metal—Liquid Interfaces

Cited by 8 publications

References 76 publications

The Role of Photon Energy and Semiconductor Substrate in the Plasmon-Mediated Photooxidation of Citrate by Silver Nanoparticles

The Role of Photon Energy and Semiconductor Substrate in the Plasmon-Mediated Photooxidation of Citrate by Silver Nanoparticles

Immunoassay of β 2 -microglobulin at oxide-coated heavily doped p-silicon electrodes

Sensitive Linear Surface Optics with Metal–Insulator–Metal Tunnel Contacts

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