Surface-Enhanced Second-Harmonic Generation

Chen, C. K.; Castro, Alonso; Shen, Y. R.

doi:10.1103/physrevlett.46.145

Cited by 501 publications

(284 citation statements)

References 16 publications

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“…Evidently these results are very similar to the Agarwal-Jha predictions. Indeed, the results for Ag, Cu, and Au are similar to what Zeman and Schatz found earlier in their modeling of the island film experiments of Chen et al [33]. Zeman and coworkers [34] obtained reasonable correspondence with these experiments for Ag, Au, and Cu and a subsequent study of Pt films was also successful.…”

supporting

confidence: 73%

Hyper-Rayleigh scattering studies of silver, copper, and platinum nanoparticle suspensions

Johnson

Hupp

et al. 2002

Chemical Physics Letters

142

109

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The optical frequency doubling properties of silver, copper, and platinum nanoparticles in aqueous solution are studied via hyper-Rayleigh scattering (HRS) spectroscopy. Substantial HRS responses are observed for silver and copper particles. The response is attributed to enhancement due to resonance of the nonlinearly scattered light with the particles' surface plasmon absorption band. Platinum particles, which lack visible-region plasmon absorption, do not display detectable HRS signals. The largest signals from silver particles are observed under conditions of two-photon resonance, qualitatively consistent with the predictions of available theory; smaller yet still impressive signals are observed under pre-and post-resonant conditions. Ó

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supporting

confidence: 73%

Hyper-Rayleigh scattering studies of silver, copper, and platinum nanoparticle suspensions

Johnson

Hupp

et al. 2002

Chemical Physics Letters

142

109

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“…Surface enhancement of second harmonic generation has also been observed [9]. In this case, since a smooth bare metal surface can already yield a detectable signal, and no adsorbed molecule on the surface is needed for the measurement, the enhancement can be obtained directly by comparing the second harmonic signals from a smooth surface and a rough surface, and is solely due to the local field increase.…”

Section: Surface Enhanced Nonlinear Optical Effectsmentioning

confidence: 95%

“…A!llong others, surface enhancement of one-photon [27] and multiphoton [9] excited luminescence,hyper Raman scattering [28], third harmonic generation [29], and four-wave mixing [29] have also been seen. In most cases, the actual enhancement factor is difficult to measure because the signal from a smooth surface is far from being detectable as one would predict from estimates.…”

Section: Surface Enhanced Nonlinear Optical Effectsmentioning

confidence: 99%

“…The recent discovery of surface enhanced Raman scattering (which b'eing a two-photon transition can also be considered as a nonlinear optical process) has led to the possibility of studying adsorbed molecules on some rough metal surfaces by Raman spectroscopy [8]. We then realize that such surface enhancement should also happen to other nonlinear optical processes [9]. Study of adsorbed molecules on those rough metal surfaces by surface nonlinear optics then also becomes feasible [10].…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Optical Techniques for Surface Studies

Shen

1990

Spectroscopic and Diffraction Techniques in Interfacial Electrochemistry

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Recent effort in developing nonlinear optical techniques for surface studies is reviewed. Emphasis is on monolayer detection of adsorbed molecules on surfaces. It is shown that surface coherent antiStokes Raman scattering (CARS) with picosecond pulses has the sensitivity of detecting submonolayer of molecules. On the other hand, second harmonic or sum-frequency generation is also sensitive enough to detect molecular monolayers. Surface-enhanced nonlinear optical effects on some rough metal surfaces have been observed. This facilitates the detection of molecular monolayers on such surfaces, and makes the study of molecular adsorption at a liquid-metal interface feasible. Advantages and disadvantages of the nonlinear optical techniques for surface studies are discussed.

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“…In general, aggregation intensifies the second harmonic generation of HGNs in contact with one another, effectively combining their collective energy to generate new photons with twice the frequency and half the wavelength [292][293][294][295]. HGN aggregates are also known to exhibit both hybridized plasmon modes, which are the result of surface plasmon interactions with cavity plasmon modes, and collective charge transfer resonances [296][297][298].…”

Section: Plasmon Coupling In Aggregates For Sersmentioning

confidence: 99%

Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

2016

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By electrodeposition and galvanic replacement reaction, we developed a facile, time-saving, cost-effective, and environmentally friendly, two-step synthesis route to obtain a controllable cobalt oxide/Au hierarchically nanostructured electrode for glucose sensing. The nanomaterials were characterized by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, energy-dispersive spectrometry, and X-ray photoelectron spectroscopy, meanwhile, the sensing performance was investigated by cyclic voltammetry and amperometric response. The results revealed that this novel electrode exhibited excellent electrocatalytic performance toward glucose oxidation, with a wide double-linear range from 0.2 μM to 20 mM and a low detection limit of 0.1 μM based on a signal-to-noise ratio of 3, which was mainly attributed to the ability of loading a small amount of Au with good electron conductivity on the surface of cobalt oxide nanosheets with large active surface area and synergistic electrocatalytic activity of Au and cobalt oxide toward glucose electrooxidation. This facile, sensitive, and selective glucose sensor is also proven to be suitable for the detection of glucose in human serum.

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Surface-Enhanced Second-Harmonic Generation

Cited by 501 publications

References 16 publications

Hyper-Rayleigh scattering studies of silver, copper, and platinum nanoparticle suspensions

Hyper-Rayleigh scattering studies of silver, copper, and platinum nanoparticle suspensions

Nonlinear Optical Techniques for Surface Studies

Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

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