Papers – Page 350 – TechConnect Briefs

The study of the microwave absorption and optical properties of the Al- N codoped SiC Nanopowders

Dou Y.K., Jin H.B., Beijing Institute of Technology, CN

Nanopowders of aluminum and nitrogen codoped β-silicon carbide (β-SiC) were successfully produced by self-propagating high-temperature synthesis in a nitrogen atmosphere. Characterizations by X-ray diffraction and scanning electron microscopy demonstrate the formation of Al-N codoped β-SiC [...]

Electrical conductivity of carbon nanopowder fillers and their respective polymer composites prepared via latex technology

Ghislandi M., Marinho B., Tkalya E., Koning C.E., de With G., Eindhoven University of Technology, NL

The electrical conductivity of graphene, multi-wall carbon nanotubes (MWCNTs) and carbon black (CB) nanopowders, and graphite powder is characterized in the form of paper-like films (buckypapers) and by means of powder compression. Subsequently, carbon filler [...]

Unusual thermal diffusion of carbon nanotubes in a thermoplastic polymer

Tishkova V., Pavlenko E., Puechmont P., Flahaut E., Bacsa W.S., CEMES, Univ. Toulouse, FR

The dispersion of carbon nanotubes in polymer composites is a major challenge. Although nanotubes have a high aspect ratio, their tendency to agglomerate limit percolation at low loading. We find that thermal diffusion is reducing [...]

Near-Infrared Light Induced Mechanical Responses in Single-to-Few Layer Graphene

Loomis J., King B., Panchapakesan B., University of Louisville, US

Layer dependent physical responses of graphene-based polymer composites to near-infrared (NIR) light are reported. Thin film polymer composites were fabricated and compared utilizing both single layer graphene and few layer graphene (~5 layers). NIR-induced axial [...]

Photomechanical Response in Graphene Nanoplatelet Composites

Loomis J., King B., Burkhead T., Xu P., Bessler N., Terentjev E., Panchapakesan B., University of Louisville, US

Large light-induced reversible and elastic responses of graphene nanoplatelet (GNP) polymer composites are reported. Homogeneous mixtures of GNP/polydimethylsiloxane (PDMS) composites (0.1–5 wt%) were prepared and their near-infrared (NIR) mechanical responses studied with increasing pre-strains. Using [...]

Carbon Based Dimensional Composites

Loomis J., King B., Panchapakesan B., University of Louisville, US

Dimensional dependence of mechanical response in carbon nanostructure composites to near-infrared (NIR) light are reported. Using polydimethylsiloxane, composites were fabricated with one-dimensional multi-wall carbon nanotubes (MWCNTs), two dimensional single-layer graphene, two and a half-dimensional graphene [...]

Mapping nanomechanical phenomena of graphene nanostructures using force modulation and ultrasonic force microscopy

Kolosov O.V., Kay N.D., Robinson B.J., Rosamond M., Zeze D., Dinelli F., Lancaster University, UK

Whereas graphene electronic properties are extensively studied, mechanical properties of graphene nanostructures are much less experimentally explored even for simple graphene structures. We use a combination of force sensitive scanning probe microscopies that combines low [...]

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