Electronic and optical features of silicon carbide nanoparticles and nanocomposites
Electron paramagnetic resonance (EPR) investigations were carried out on hybrid Core-Shell nanomaterials associating silicon carbide nanoparticles and conducting polyaniline. The performed experiments compare the paramagnetic centres, the electronic transport features and the interface effects in two classes of materials, bare polymers and core-shell nanocomposites. By EPR, large doping rates were demonstrated in the bare doped polymers through important saturation phenomena which alter significantly the EPR spectrum features. Furthermore, memory effects were involved in the bare doped polymer with regard to the EPR spectrum features depending on the conditions of its thermal treatments. In the hybrid core-shell nanocomposites nor such saturation and nor memory effects were found on the EPR signals even if similar paramagnetic centres exist in both classes of samples. These behaviors were discussed taking into account the thermal stability and the doping efficiency in the considered classes of materials. Optimal doping levels were then realized and their effects on the polymers and the nanocomposites were clarified by using EPR and DRS (dielectric relaxation spectroscopy) measurements. Also, it is demonstrated that the charge carriers consist in polarons in the nanocomposites while bipolarons contributions dominate the electrical conductivity in the bare doped polymers.
Charge carrier mobility in an organic-inorganic hybrid nanocomposite
This study was supported by a NSF, DMR Solid State 
and Polymer Chemistry Grant No. DMR0075867. Partial 
support by a Defense Research Initiative on Nanotechnology 
(DURINT), Contract No. F496200110358, through the Directorate 
of Chemistry and Life Sciences of the Air Force 
Office of Scientific Research is also acknowledged.
The Problems and Opportunities in Developing International Business Programs
This paper discusses the results of a survey conducted among AACSB member schools. The survey dealt with two major topical areas. These were (a) what types of International Business programs currently exist in AACSB Schools, and (b) problems associated with these programs. The paper also suggests countries that offer opportunities to Colleges of Business to pursue countty-specific programs.