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31.
S. M. Jones A. Amran S. E. Friberg B. Katz G. C. Farrington 《Journal of Dispersion Science and Technology》2013,34(1):97-117
ABSTRACT Materials which display ionic conductivity were produced by the sol-gel and microemulsion-gel methods. The charging and discharging characteristics were investigated and it was found that a single ionic species was responsible for the conduction, the ionic species being residual protons from the initial component mixture. The complex impedence of various samples was measured and the ionic conductivities ranged in value from 9 × 10?8 to 1 × 10?5 ohm?1 cm?1. An Arrhemius plot for a microemulsion-gel revealed that the energy of activation was 0.15 eV. 相似文献
32.
We report a new stochastic model for studying the polarization-dependent gain in Raman fiber amplifiers with randomly varying birefringence as a function of the pump state of polarization and the polarization mode dispersion parameter. Our theoretical results agree with the previously obtained experimental data. 相似文献
33.
Ning Z Molnár M Chen Y Friberg P Gan L Ågren H Fu Y 《Physical chemistry chemical physics : PCCP》2011,13(13):5848-5854
In order to study the role of surface ligands in determining optical properties of colloidal quantum dots (QDs), we have selectively fabricated and studied CdSe/CdS core-shell QDs with strongly confined electron and hole states attached with commonly used surface ligands. Optical properties, viz. absorption and fluorescence of these QDs, are characterized from which salient changes have been observed for different ligand substitutions which, through theoretical analysis, can be associated with electronic structure properties of the QD-ligand composite systems, in particular localization of wave functions of electrons and holes in the QDs and the band matching of the HOMO-LUMO gap of the ligands. The findings can be utilized to facilitate the understanding and optimization of properties of QD biomarkers with functionalizing surface ligands for targeting cellular objects. 相似文献
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Optical birefringence of the spatial dispersion type has been observed in cubic ZnSe crystals. 相似文献
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Leong M. Gan Chwee H. Chew Stig E. Friberg 《Journal of polymer science. Part A, Polymer chemistry》1983,21(2):513-523
The solubility of styrene, its oligomers, and different molecular weight polymers was determined in W/O microemulsions stabilized by sodium dodecyl sulfate and pentanol. The results showed a complex pattern due to the interactions with pentanol, surfactant, and associated structures. 相似文献
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Non-aqueous birefringent microemulsions were found in a system ofp-xylene, glycerol, triethanolammonium oleate and oleic acid. The microemulsions showed long term stability once formed, but failed to form spontaneously when the components were contacted. After partial separation by centrifugation, no signs of spontaneous reformation were found. 相似文献