Global ETD Search

1	Color control of white photoluminescence from carbon-incorporated silicon oxide Lehto, V.-P., Shibata, N., Nazarov, A. N., Lysenko, V. S., Muto, S., Salonen, J., Vasin, A. V., Ishikawa, Yukari 10 1900 (has links) No description available. Silicon Visible spectra Carbon Oxidation Photoluminescence
2	Optical spectroscopy of two-dimensional hole systems in the quantum limit Townsley, Christopher Mark January 1999 (has links) No description available. 530.41
3	Green magnetite (Fe3O4): Unusual optical Mie scattering and magnetic isotropy of submicron-size hollow spheres Ye, Quan-Lin, Yoshikawa, Hirofumi, Bandow, Shunji, Awaga, Kunio 11 February 2009 (has links) No description available. iron compounds magnetic particles magnetic structure magnetic thin films magneto-optical effects Mie scattering visible spectra
4	Phonon-assisted lasing in ZnO microwires at room temperature Michalsky, Tom, Wille, Marcel, Dietrich, Christof P., Röder, Robert, Ronning, Carsten, Schmidt-Grund, Rüdiger, Grundmann, Marius 11 August 2018 (has links) We report on room temperature phonon-assisted whispering gallery mode (WGM) lasing in ZnO microwires. For WGM laser action on the basis of the low gain phonon scattering process high quality resonators with sharp corners and smooth facets are prerequisite. Above the excitation threshold power PTh of typically 100 kW/cm2, the recombination of free excitons under emission of two longitudinal optical phonons provides sufficient gain to overcome all losses in the microresonator and to result in laser oscillation. This threshold behavior is accompanied by a distinct change of the far and near field emission patterns, revealing the WGM related nature of the lasing modes. The spectral evolution as well as the characteristic behavior of the integrated photoluminescence intensity versus the excitation power unambiguously proves laser operation. Polarization-resolved measurements show that the laser emission is linear polarized perpendicular to the microwire axis (TE). info:eu-repo/classification/ddc/530 ddc:530
5	Corrosion Protection Performance and Spectroscopic Investigations of Soluble Conducting Polyaniline-Dodecylbenzenesulfonate Synthesized via Inverse Emulsion Procedure Shreepathi, Subrahmanya, Hoang, Hung Van, Holze, Rudolf 09 May 2009 (has links) (PDF) Corrosion protection performance of a completely soluble polyaniline-dodecylbenzenesulfonic acid salt (PANI-DBSA) on C45 steel has been studied with electrochemical impedance and potentiodynamic measurements. Chloroform is the most suitable solvent to process the pristine PANI-DBSA because of negligible interaction of the solvent with the polyaniline (PANI) backbone. An anodic shift in the corrosion potential (<img src="http://scitation.aip.org/stockgif3/Dgr.gif" alt="Delta" align="bottom" border="0"><i>E</i>=~70  mV), a decrease in the corrosion current and a significant increase in the charge transfer resistance indicate a significant anti-corrosion performance of the soluble PANI deposited on the protected steel surface. Corrosion protection follows the mechanism of formation of a passive oxide layer on the surface of C45 steel. In situ UV-Vis spectroscopy was used to investigate the differences in permeability of aqueous anions into PANI-DBSA. Preliminary results of electron diffraction studies show that PANI-DBSA possesses an orthorhombic type of crystal structure. An increase in the feed ratio of DBSA to aniline increases the tendency of aggregation of spherical particles of PANI obvious in transmission electron microscopy. PANI-DBSA slowly loses its electrochemical activity in acid free electrolyte without undergoing degradation. Electrochemical analytical methods PANI-DBSA aggregation charge exchange conducting polymers corrosion protection electrochemical impedance spectroscopy electron diffraction permeability polymer films polymer structure steel transmission electron microscopy ultraviolet spectra visible spectra ddc:540 Dodecylbenzolsulfonate Inverse Emulsionspolymerisation Polyaniline
6	Corrosion Protection Performance and Spectroscopic Investigations of Soluble Conducting Polyaniline-Dodecylbenzenesulfonate Synthesized via Inverse Emulsion Procedure Shreepathi, Subrahmanya, Hoang, Hung Van, Holze, Rudolf 09 May 2009 (has links) Corrosion protection performance of a completely soluble polyaniline-dodecylbenzenesulfonic acid salt (PANI-DBSA) on C45 steel has been studied with electrochemical impedance and potentiodynamic measurements. Chloroform is the most suitable solvent to process the pristine PANI-DBSA because of negligible interaction of the solvent with the polyaniline (PANI) backbone. An anodic shift in the corrosion potential (<img src="http://scitation.aip.org/stockgif3/Dgr.gif" alt="Delta" align="bottom" border="0"><i>E</i>=~70  mV), a decrease in the corrosion current and a significant increase in the charge transfer resistance indicate a significant anti-corrosion performance of the soluble PANI deposited on the protected steel surface. Corrosion protection follows the mechanism of formation of a passive oxide layer on the surface of C45 steel. In situ UV-Vis spectroscopy was used to investigate the differences in permeability of aqueous anions into PANI-DBSA. Preliminary results of electron diffraction studies show that PANI-DBSA possesses an orthorhombic type of crystal structure. An increase in the feed ratio of DBSA to aniline increases the tendency of aggregation of spherical particles of PANI obvious in transmission electron microscopy. PANI-DBSA slowly loses its electrochemical activity in acid free electrolyte without undergoing degradation. info:eu-repo/classification/ddc/540 ddc:540 Dodecylbenzolsulfonate Inverse Emulsionspolymerisation Polyaniline Electrochemical analytical methods PANI-DBSA aggregation charge exchange conducting polymers corrosion protection electrochemical impedance spectroscopy electron diffraction permeability polymer films polymer structure steel transmission electron microscopy ultraviolet spectra visible spectra

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