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A simple yet consequential modification was made to the popular carbonization processing of citric acid - polyethylenimine precursor mixtures to produce carbon dots (CDots). The modification was primarily on pushing the carbonization processing a little harder at a higher temperature, such as the hydrothermal processing condition of around 330 °C for 6 h. The CDots thus produced are comparable in...
Diamond/CeF3 composite film (DCCF) electroluminescence devices was fabricated on highly doping n-type silicon substrates by using plasma chemical vapor deposition techniques and vacuum electron beam evaporation techniques. The films were characterized by field emission scanning electron microscopy (FE-SEM), Energy dispersive spectrum (EDS), X-ray diffraction (XRD) and electroluminescence (EL) spectrum...
A simple process to synthesize three-dimensional molybdenum disulfide-graphene monolithic catalysts (3D-MoS2-G) was developed. 3D-MoS2-G hybrid monoliths were fabricated by a combined hydrothermal self-assembly and freeze-drying treatment, in which ammonium tetrathiomolybdate and graphite oxide were used as starting materials. The structure and morphology of the samples were characterized by X-ray...
Vertically oriented carbon nanosheet (VCNS)–carbon nanotube (CNT) hybrid films with a large area (∼4cm 2 ) were fabricated on Mo layers by using microwave plasma-assisted chemical vapor deposition technique. The Mo layers, which were deposited on Al 2 O 3 ceramic substrates through electron beam evaporation deposition, were pretreated by a laser-grooving technology (4lines/mm)...
Carbon fibers (CFs) were oxidized by concentrated HNO 3 and then reacted with polyamidoamine dendrimers (PAMAM) with an average molecular weight of 157 to form CF–PAMAM. The CF–PAMAM was further reacted with oxidized carbon nanotubes (CNTs) to form CF–PAMAM–CNTs that were used as the reinforcement for epoxy resin-based composites. The functional groups and structure of the CF–PAMAM–CNTs were...
Activated carbon fibers are known to contain pores with a small resistance for electrolyte migration while possessing a large electrical resistance between the fibers. A carbon powder derived from pulverization of PAN-based carbon fibers was examined as an electrode for electric double layer capacitors using H 2 SO 4 as the electrolyte solution. The performance of conventional-type...
In this article, the temperature dependence of electrical resistivity is studied for carbon black (CB)/ultra-high molecular weight polyethylene (UHMWPE) composites. A new positive temperature coefficient (PTC) material with a very low percolation threshold is produced by the hot compaction method. The very low percolation threshold can be attributed to the segregation of CB in the interfacial regions...
Mesoporous carbon was prepared from resol-type phenol-formaldehyde resin using mesoporous silica as template. By filling the resin into the pores of the template, followed by resin carbonization and template dissolution, mesoporous carbon preparation can be significantly simplified. Small-angle X-ray diffraction reflected the long-range ordering of the pores in the carbon. TEM and N 2 -adsorption...
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