Photoelectron emission caused by surface plasmons in silver nanoparticles

Nollé, É. L.; Shchelev, M. Ya.

doi:10.1134/1.1748607

Cited by 13 publications

(8 citation statements)

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“…Adsorbed molecules can undergo electron-transfer photochemistry. The initial plasmon dephasing has been described as decay into a single “hot” electron excitation with the energy of the absorbed photon. − The strong SERS seen for chemisorbed molecules is thought to result from femtosecond transient “hot” electron localization on the surface molecule . Electron-transfer photochemistry was reported in the early colloidal SERS literature; spectra were observed to change as they were being acquired. , Furthermore, studies have shown that high-intensity visible laser irradiation can cause the formation of silver and gold nanoparticles both in solution and on surfaces. , …”

Section: Introductionmentioning

confidence: 99%

“…The initial plasmon dephasing has been described as decay into a single "hot" electron excitation with the energy of the absorbed photon. [5][6][7][8][9][10][11] The strong SERS seen for chemisorbed molecules is thought to result from femtosecond transient "hot" electron localization on the surface molecule. 12 Electron-transfer photochemistry was reported in the early colloidal SERS literature; spectra were observed to change as they were being acquired.…”

Section: Introductionmentioning

confidence: 99%

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Photovoltage and Photocatalyzed Growth in Citrate-Stabilized Colloidal Silver Nanocrystals

2007

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The photocatalyzed reduction of aqueous silver ions, by citrate adsorbed on silver nanocrystals, is studied on Formvar/carbon TEM grids and in photoelectrochemical cells. The reaction is characterized by transmission electron microscopy (TEM) monitoring of individual particles throughout the growth process. The photoinitiated growth on the silver particles is uniform and is not dependent upon the laser polarization. The potential of silver particle working electrodes is shown to shift negatively under irradiation in solutions of citrate. Adding silver ions to this system quenches the charging of the particle working electrode through charge transfer to the silver ions. The reaction is hypothesized to result from photoelectron transfer from adsorbed citrate to the silver nanoparticle. Nanocrystal growth occurs when this "stored" charge reduces silver ions in solution. Comments are offered on the photo-reformulation of colloidal nanocrystals into prisms reported in the literature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photovoltage and Photocatalyzed Growth in Citrate-Stabilized Colloidal Silver Nanocrystals

2007

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“…Optically excited plasmons can dephase to produce electron–hole pairs within a metal. These “hot” carriers relax through electron collisions, coupling to lattice vibrations, emission, or coupling to nanostructures. , In photoemission , and during electron energy loss measurements in electron microscopy, hot electrons are emitted under very high electric fields. Hot electrons have been implicated in enhanced photocatalysis, − and recently, Mukerjee et al have explicitly demonstrated plasmon-induced dissociation of hydrogen.…”

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confidence: 99%

Exploiting Plasmon-Induced Hot Electrons in Molecular Electronic Devices

Conklin

Nanayakkara²,

Park³

et al. 2013

ACS Nano

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Plasmonic nanostructures can induce a number of interesting responses in devices. Here we show that hot electrons can be extracted from plasmonic particles and directed into a molecular electronic device, which represents a new mechanism of transfer from light to electronic transport. To isolate this phenomenon from alternative and sometimes simultaneous mechanisms of plasmon-exciton interactions, we designed a family of hybrid nanostructure devices consisting of Au nanoparticles and optoelectronically functional porphyin molecules that enable precise control of electronic and optical properties. Temperature- and wavelength-dependent transport measurements are analyzed in the context of optical absorption spectra of the molecules, the Au particle arrays, and the devices. Enhanced photocurrent associated with exciton generation in the molecule is distinguished from enhancements due to plasmon interactions. Mechanisms of plasmon-induced current are examined, and it is found that hot electron generation can be distinguished from other possibilities.

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“…In metals, the large carrier density makes the hot electron effects less pronounced at room temperature. − Accordingly, the hot electron effects in metals have been observed at low temperatures. However, as in semiconductors, hot electrons can be generated via plasmonic resonances, even at room temperature. − If hot electrons were ejected out of a metallic substrate, positively charged holes would be left on the surface . The hot electrons would be able to reduce the adsorbate assembled on the metal, while the holes could potentially oxidize the adsorbate. − The room temperature photodissociation of H 2 on Au/TiO 2 nanocomposites has been interpreted by Mukherjee et al as being due to the plasmonically generated hot electrons .…”

Section: Introductionmentioning

confidence: 99%

Fe³⁺to Fe²⁺Conversion by Plasmonically Generated Hot Electrons from Ag Nanoparticles: Surface-Enhanced Raman Scattering Evidence

et al. 2014

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We have demonstrated using surface-enhanced Raman scattering (SERS) of cyanide that "hot" electrons can be plasmonically generated from nanostructured Ag and/or Au substrates. For this, we first fabricated poly(ethylenimine) (PEI)capped Ag and Au nanoparticle films onto glass slides. Cyanide was then adsorbed (via the carbon lone-pair electrons) onto the films to obtain the NC/Ag and NC/Au systems. Subsequently, Fe 3+ or Fe 2+ ions were bound to the pendant nitrogen atoms to obtain the corresponding Fe 3+ /NC/Ag and Fe 3+ /NC/Au systems or the Fe 2+ /NC/Ag and Fe 2+ /NC/Au systems. All these systems were stable under laser light illumination at 632.8 nm, with CN stretching bands at 2159 and 2143 cm −1 for the Fe 3+ / NC/Ag and Fe 2+ /NC/Ag systems, respectively, and at 2180 and 2158 cm −1 for the Fe 3+ /NC/Au and Fe 2+ /NC/Au systems, respectively. Under the laser light illumination at 514.5 nm, the Fe 3+ /NC/Ag system was gradually converted to the Fe 2+ /NC/Ag system, with the CN stretching band shifting from 2159 to 2143 cm −1 . This Fe 3+ to Fe 2+ conversion is due to the hot electrons plasmonically generated from the PEI-capped Ag nanoparticle film. Furthermore, it appears as though the generation of hot electrons is an efficient process, because Fe 3+ to Fe 2+ conversion was facile although the Fe 3+ /NC/Ag system was buried in ice at the liquid N 2 temperature (77 K). In turn, the infeasible oxidation of Fe 2+ to Fe 3+ is due to the formation of so-called "hot" holes, which if generated, would be reactive only to the species in contact with the Ag nanoparticles. Because the PEI-capped Au film was not SERS-active at 514.5 nm, the generation of hot electrons with excitation occurring at shorter wavelengths could not be examined, although the Fe 3+ /NC/Au system could be converted to the Fe 2+ /NC/Au system (or vice versa) by a brief contact with a mild solution of borohydride (or permanganate).

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Photoelectron emission caused by surface plasmons in silver nanoparticles

Cited by 13 publications

References 3 publications

Photovoltage and Photocatalyzed Growth in Citrate-Stabilized Colloidal Silver Nanocrystals

Photovoltage and Photocatalyzed Growth in Citrate-Stabilized Colloidal Silver Nanocrystals

Exploiting Plasmon-Induced Hot Electrons in Molecular Electronic Devices

Fe³⁺to Fe²⁺Conversion by Plasmonically Generated Hot Electrons from Ag Nanoparticles: Surface-Enhanced Raman Scattering Evidence

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Photoelectron emission caused by surface plasmons in silver nanoparticles

Cited by 13 publications

References 3 publications

Photovoltage and Photocatalyzed Growth in Citrate-Stabilized Colloidal Silver Nanocrystals

Photovoltage and Photocatalyzed Growth in Citrate-Stabilized Colloidal Silver Nanocrystals

Exploiting Plasmon-Induced Hot Electrons in Molecular Electronic Devices

Fe3+to Fe2+Conversion by Plasmonically Generated Hot Electrons from Ag Nanoparticles: Surface-Enhanced Raman Scattering Evidence

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Product

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Fe³⁺to Fe²⁺Conversion by Plasmonically Generated Hot Electrons from Ag Nanoparticles: Surface-Enhanced Raman Scattering Evidence