Journal ArticleDOI
Surface roughness and the enhanced intensity of Raman scattering by molecules adsorbed on metals
Reads0
Chats0
TLDR
In this article, the anomalous intensity arises from preresonant or resonant excitations of conduction electron resonances in adsorbate covered metal bumps on the surface, which form a two-dimensional colliodlike layer which displays a collective resonance at a frequency which depends on the bump density.Abstract:
Greatly enhanced Raman scattering from monolayers of pyridine adsorbed on silver has been reported by several authors. I propose that the anomalous intensity arises from preresonant or resonant excitations of conduction electron resonances in adsorbate covered metal bumps on the surface. The bumps form a two‐dimensional colliodlike layer which displays a collective resonance at a frequency which depends on the bump density. The model can account for the disparate excitation functions reported by two groups in terms of varying degrees of roughness. The apparent lack of enhancement with metals other than Group Ib is also explained.read more
Citations
More filters
Journal ArticleDOI
Localized Surface Plasmon Resonance Spectroscopy and Sensing
TL;DR: This review describes recent fundamental spectroscopic studies that reveal key relationships governing the LSPR spectral location and its sensitivity to the local environment, including nanoparticle shape and size and introduces a new form of L SPR spectroscopy, involving the coupling between nanoparticle plasmon resonances and adsorbate molecular resonances.
Journal ArticleDOI
Surface-enhanced spectroscopy
TL;DR: The surface-enhanced Raman scattering (SERS) effect was first discovered by Fleischmann, Van Duyne, Creighton, and Creighton as discussed by the authors, who showed that molecules adsorbed on specially prepared silver surfaces produce a Raman spectrum that is at times a millionfold more intense than expected.
Journal ArticleDOI
Why gold nanoparticles are more precious than pretty gold: noble metal surface plasmon resonance and its enhancement of the radiative and nonradiative properties of nanocrystals of different shapes.
Susie Eustis,Mostafa A. El-Sayed +1 more
TL;DR: A number of applications are presented that take advantage of the electromagnetic field enhancement of the radiative properties of noble metal nanoparticles resulting from the surface plasmon oscillations.
Journal ArticleDOI
Interparticle Coupling Effect on the Surface Plasmon Resonance of Gold Nanoparticles: From Theory to Applications
Sujit Kumar Ghosh,Tarasankar Pal +1 more
TL;DR: This paper presents a meta-analysis of four-Wave Mixing and its applications in nanofiltration, which shows clear trends in high-performance liquid chromatography and also investigates the role of nano-magnifying lens technology in this process.
Journal ArticleDOI
Ultrasensitive Chemical Analysis by Raman Spectroscopy
TL;DR: The spontaneous Raman effect, in the following simply called Raman scattering, is focused on, which can be applied noninvasively under ambient conditions in almost every environment and has special importance for ultrasensitive Raman spectroscopy at the singlemolecule level.
References
More filters
Journal ArticleDOI
Surface raman spectroelectrochemistry: Part I. Heterocyclic, aromatic, and aliphatic amines adsorbed on the anodized silver electrode
TL;DR: In this article, the authors verified the remarkable sensitivity of Raman spectroscopy for the study of adsorbed pyridine on a silver surface, and extended its applicability to other nitrogen heterocycles and amines.
Journal ArticleDOI
Plasma Losses by Fast Electrons in Thin Films
TL;DR: In this paper, the angle energy distribution of a fast electron losing energy to conduction electrons in a thick metallic foil has been derived assuming that the conduction electron constitute a Fermi-Dirac gas and that the fast electron undergoes only small fractional energy and momentum changes.
Journal ArticleDOI
Anomalously intense Raman spectra of pyridine at a silver electrode
TL;DR: Anomalously intense Raman spectra of pyridine at a silver electrode was reported in this article, where the Raman spectrum was shown to have a high Raman intensity.
Journal ArticleDOI
On the Dependence of Vibrational Raman Intensity on the Wavelength of Incident Light
A. C. Albrecht,M. C. Hutley +1 more
TL;DR: In this article, the wavelength dependence across the visible region of the intensity of the 1334 cm−1 Raman line of p−nitroaniline (PNA) was analyzed from a general theoretical viewpoint.
Journal ArticleDOI
Effect of surface plasmons on transitions in molecules
TL;DR: In this article, a quantum theory of the coupling of excited molecules to the surface plasmon modes of a metal is described, and formulas for the separate decay into s photon, p photon, and surface PLAsmon channels valid for all molecule−metal separations are given.
Related Papers (5)
Surface raman spectroelectrochemistry: Part I. Heterocyclic, aromatic, and aliphatic amines adsorbed on the anodized silver electrode
Raman spectra of pyridine adsorbed at a silver electrode
Anomalously intense Raman spectra of pyridine at a silver electrode
Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering
Shuming Nie,Steven R. Emory +1 more