Near field spectroscopic investigation of fluorescence quenching by charge carriers in pentacene-doped tetracene

Article Abstract:

The study of exciton/polaron interactions in single crystals of the mixed organic semiconductor, single crystal of tetracene molecularly doped with pentacene, is carried out by near field scanning optical microscopy (NSOM) technique with an electrically biased NSOM probe. Analysis indicated that the injection of hole polarons induces extreme fluorescence quenching for tetracene/pentacene.

Optical Instrument and Lens Manufacturing, Optical instruments and lenses, Optical Microscopes & Parts, Polymers, Fluorescence, Optical microscopes

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(n, m) Structural assignments and chirality dependence in single-wall carbon nanotube Raman scattering

Article Abstract:

The method used to measure Raman scattering with low background from suspending thin bundles of single-wall carbon nanotubes (SWNTs) with smaller diameters is studied. An unambiguous, convenient and noninvasive way to determine (n, m) are provided by Raman scattering on the basis of the relative G-band Raman intensity, radial breathing mode (RBM) frequency and I(sub s)/I(sub as) ratio.

Carbon, Raman effect

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Quantitative noncontact electrostatic force imaging of nanocrystal polarizability

Article Abstract:

A simple analytical model describing tip-surface interactions in an electrostatic force microscopy (EFM) experiment was proposed. Three tips with different sphere radii were used to detected EFM force gradients on an array of samples of dispersed Au nanoparticles with diameters ranging from 6 to 18 nm.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Gold, Microscope and microscopy, Microscopy, Chemical properties, Electrostatic accelerators, Electrostatic generators

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