✦ LIBER ✦

Near-infrared excitation profile study of surface-enhanced hyper-Raman scattering and surface-enhanced Raman scattering by means of tunable mode-locked Ti: sapphire laser excitation

✍ Scribed by Katrin Kneipp; Harald Kneipp; Frank Seifert

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 430 KB
Volume: 233
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01513-u

No coin nor oath required. For personal study only.

✦ Synopsis

Excitation profiles of surface-enhanced hyper-Raman scattering (SEHRS) and surface-enhanced Raman scattering (SERS) of crystal violet on colloidal silver were measured using 1 ps Ti:sapphire laser pulses at wavelengths between 750 and 830 nm. Our measurements allowed the direct determination of the ratio between SEHRS and SERS intensities which exhibited a strong dependence on excitation wavelength. The measured variation of this ratio can be explained by different electromagnetic contributions to the enhancement factors of SEHRS and SERS at different excitation wavelengths. Total surface enhancement factors of hyper-Raman scattering can be estimated to be the order of 1014.

📜 SIMILAR VOLUMES

Surface-enhanced hyper-Raman scattering

Surface-enhanced hyper-Raman scattering (SEHRS) and surface-enhanced Raman scattering (SERS) by means of mode-locked Ti:sapphire laser excitation

✍ H. Kneipp; K. Kneipp; F. Seifert 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 424 KB

Surface-enhanced hyper-Raman scattering (SEHRS) and surface-enhanced Raman scattering (SERS) using mode-locked Ti: sapphire laser excitation is reported. SEHRS and SERS from crystal violet molecules on colloidal silver were measured using 1 ps laser pulses (82 MHz repetition rate, I .2 W average pow

Tunable laser excitation profile of surf

Tunable laser excitation profile of surface enhanced raman scattering from pyridine adsorbed on a copper electrode surface

✍ Craig S. Allen; George C. Schatz; Richard P. Van Duyne 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 425 KB

The wavelength dependence of surface enhanced Raman (SER) scattermg from pyndme on a copper electrode surface has been measured and found to correlate closely wrth the optrcal propertres of copper metal. The results are interpreted III the hght of the image field model of the SER mechanism.

Enhancement factor of surface-enhanced R

Enhancement factor of surface-enhanced Raman scattering on silver and gold surfaces upon near-infrared excitation. Indication of an unusual strong contribution of the chemical effect

✍ Peter Hildebrandt; Stefan Keller; Andreas Hoffmann; Franck Vanhecke; Bernhard Sc 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 641 KB

## Abstract Surface‐enhanced Raman (SER) spectra of the xanthine dyes rhodamine 6G (R6G) and oxazine 1 (OX1) were measured with near‐infrared excitation employing Fourier transform Raman spectroscopy. Both dyes exhibit strong SER signals on Ag and Au surfaces. The enhancement factors were evaluated