No abstract

No abstract

No abstract

No abstract

No abstract

The nanostructure formation in polyimide-fullerene composites during thermal treatment was investigated ''in situ'', by means of wide-angle (WAXS) and small-angle X-ray scattering techniques. The WAXS patterns of the PI composites do not reveal the presence of C 60 reflections. However, the PI/C 60 composite, obtained by adding the C 60 solution to the diamines-solution during the first step of the reaction (preparation of the polyamic acid, PAA), shows a maximum at small X-ray scattering angles. Results show that this intensity maximum is markedly affected by thermal treatment of the PI/C 60 composite, disappearing at high temperature. From ''in situ'' X-ray scattering experiments, the ''manner'' in which the C 60 nanoparticles are added to the other reactants and influences the properties of the final polymer is discussed.

Local current mapping of single vertically aligned multi-walled carbon nanotube in a polymer matrix J. Appl. Phys. 112, 084327 (2012); 10.1063/1.4759349 High emission currents and low threshold fields in multi-wall carbon nanotube-polymer composites in the vertical configuration J. Appl. Phys. 111, 044307 (2012); 10.1063/1.3685754Temperature evaluation of field emitting points for polymer-carbon nanotube composite using time-of-flight mass spectrometry J.In this work the authors study field-emission properties of a class of emitters formed by coating the multi-walled nanotube ͑MWNT͒ polymer composite film onto the flat metal substrate. They have obtained emission currents up to 100 mA. In order to understand the physical and chemical processes in the working composite emitter, the authors have elaborated the experimental technique combining the mass spectrometry registration apparatus with the field-emission unit.

No abstract