Photophysics on Solid Surfaces. Time-Resolved Fluorescence Spectra of Pyrene Adsorbed on Calcinated Vycor Glass
نویسندگان
چکیده
منابع مشابه
Photophysics on surfaces: determination of absolute fluorescence quantum yields from reflectance spectra.
A method for the calculation of absolute fluorescence quantum yields for dyes attached to solid particles based on reflectance measurements is reported. The same procedure allows calculation of true reflectance spectra (free of fluorescence) for highly fluorescent materials as well. Samples ofcresyl violet were immobilized by adsorption on microgranular cellulose in the concentration range 4.5 ...
متن کاملVibrational spectra of adsorbed hydrogen on GaN(001) surfaces
The infrared spectroscopy (IR) of adsorbed hydrogen on a surface is an experimental technique used to analyze semiconductor surfaces. The hydrogen atoms are bonded to the surface dangling-bonds and the vibrational frequencies of the M–H bonds are very sensitive to the local chemical character at the surface. Usually the analysis of the results is based on the comparison with the IR spectra of m...
متن کاملSolid-phase immunoassay of digoxin by measuring time-resolved fluorescence.
We describe a time-resolved fluoroimmunoassay for the cardiac glycoside digoxin. The assay depends on the competitive distribution of Eu3+-labeled anti-digoxin antibodies between solid-phase-bound digoxin and the digoxin in the sample or standard. After this immunoreaction, the bound fraction of the Eu3+-label is dissociated from the solid phase, converted into a highly fluorescent beta-diketon...
متن کاملAdsorption of water on porous Vycor glass studied by ellipsometry.
The variation of the optical properties of porous Vycor glass (Corning, Model 7930) under different relative-humidity conditions was studied. The adsorption of water into the glass pores was investigated with spectroscopic ellipsometry. The change of the refractive index was Deltan approximately 0.04 between 5% and 90% relative humidity. A linear relation between the ellipsometer parameter tan ...
متن کاملSurface induced vibrational modes in the fluorescence spectra of PTCDA adsorbed on the KCl(100) and NaCl(100) surfaces.
We report a combined experiment-theory study on low energy vibrational modes in fluorescence spectra of perylene-3,4,9,10-tetracarboxylic acid dianhydride (PTCDA) molecules. Using very low coverages, isolated molecules were adsorbed on terrace sites or at sites located at residual steps on (100) oriented alkali halide films (KCl and NaCl). The low energy modes couple to the optical transition o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1990
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.63.2475