Characterization of molecular scale environments in polymer films by single molecule spectroscopy

Article Abstract:

Issues concerning the rigidity and polarity of molecular-scale environments in thin poly(methyl methacrylate) and poly(vinyl alcohol) films are presented.

Spectrum analysis, Spectroscopy, Monomolecular films, Chemistry, Physical and theoretical, Physical chemistry, Polymethylmethacrylate, Polymethyl methacrylate

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Single-Molecule studies of Sol-Gel-Derived silicate films, microenvironments and film-drying conditions

Article Abstract:

The microenvironments found in silicate thin films dried under different conditions are characterized by single-molecule spectroscopy. Increased dye emission from the dried films results primarily from an increase in dye stability, rather than an increase in florescence quantum yield is proven.

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, Science & research, All Other Basic Inorganic Chemical Manufacturing, Thin Film Materials, Industrial inorganic chemicals, not elsewhere classified, Silicates, Thin films, Dielectric films, Quantum chemistry

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Microheterogeneity in dye-doped silicate and polymer films

Article Abstract:

Individual molecular-scale environments in silicate thin films are described for the first time using single molecule confocal microspectroscopic methods. The physicochemical environment in which each molecule is entrapped is probed using rhodamine dyes doped into the material at nanomolar level. According to static fluorescence spectra and time-dependent fluorescence signals for many single molecules, the silicate materials are highly inhomogeneous compared to polymer films.

Usage, Fluorescence spectroscopy, Molecular spectra

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