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A simple preparation procedure to produce conductive graphene coatings from graphenide solution under inert atmosphere is achieved. The obtained graphene films exhibit reasonably low surface resistivity of 5 kohms/Square at 60% transmittance at 550 nm that can be largely improved by thermal treatment. XPS, Raman spectroscopy and X-ray diffraction measurements demonstrate that annealing vastly improves...
Microwave plasma splitting of biogas to solid carbon forms is a promising technique to produce large quantities of sustainable carbon based nano materials. Well defined graphitic nano carbons have been produced exhibiting graphene multilayers in turbostratic packing. After heat treatment, the purified material has been used to formulate stable, aqueous dispersions. These dispersions are used directly...
We have characterized the electrochemical behavior of single CCVD-grown multiwalled carbon nanotubes (MWCNTs) directly connected to and protruding from the tip of tapered gold wires. Single MWCNTs were connected to gold by electrical breakdown, in absence of binder, under an optical microscope. This procedure minimizes surface contamination in comparison to micromanipulations performed in an electron...
We report a carbon nanotube (CNT)–silicon core–shell nanowire for lithium ion battery anodes. In this material, the core consists of vertically aligned CNTs synthesized through plasma enhanced chemical vapor deposition. The CNTs exhibit quite large diameters and large inter-wire spacing and are advantageous in strain accommodation and electrolyte access. The silicon shell is tailored with a thickness...
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