The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Carbon nanostructures are promising materials for electrochemical energy storage but their frequency response is usually poor, limiting their utilization in high-frequency applications. Here we demonstrate the growth of carbon nanostructures with different dopants of N, B, P/N, B/N, and Si, based on a scalable aerosol-assisted chemical vapor deposition process. The doped carbon nanostructures were...
Synthesizing high-quality graphene by catalytic transformation from amorphous silicon carbide (a-SiC) through a rapid thermal treatment (RTT) method is reported. SiO2/Si substrates are coated by a-SiC films followed by Cu and Ni films deposited sequentially. The samples are then thermally annealed by RTT for the synthesis of high-quality graphene in only 3 min. The synergistic effect of Cu and Ni...
As a consequence of their unique electronic band structures, low-dimensional materials such as one-dimensional (1D) single-wall carbon nanotubes (SWCNTs), 2D graphene and various 2D transition-metal dichalcogenides have exhibited intriguing electrical transport properties when incorporated into field-effect transistors. Meanwhile, the van-der-Waals (vdW) interfaces between top-contacted metals and...
Owing to the unique thermal transfer property, graphene attracts great attention as heat dissipation material. Many works have been devoted to increase thermal conductivity of graphene filled polymer composite by increasing the graphene loading. In this work, a novel composite was fabricated by rolling graphene sheets into vertically aligned graphene film (VAGF) and then penetrating liquid polydimethylsiloxane...
Direct synthesis of uniform thickness and large-size monolayer or multilayer graphene films on insulating/semiconducting substrates are desirable for future nanoelectronics. In this work, ion implantation technique is used to produce ultra-thin carbon layers directly on the (0001) Si-face of a 6H-silicon carbide surface. C ions are implanted in Si-face of SiC followed by thermal annealing. Upon cooling,...
We demonstrate a novel chemical synthesis and functional doping process of vertical graphene nanosheets and other nano-carbons using natural precursors. The all-carbon electrodes are synthesized via the plasma reformation of natural fats and functionalized by microwave-assisted doping using leaf extracts from a variety of horticultural plants such as bok choy, chrysanthemum, and spinach. The resulting...
Several studies have focused on synthesizing large-size graphene with an uniform crystal structure. However, graphene synthesized thus far is generally grainy. Grain properties such as size, shape, and crystal orientation are the basis for improving quality. In this study, a nematic liquid crystal is used to observe the several structural properties of graphene synthesized by chemical vapor deposition...
First-principles calculation identifies elementary processes in the thermal reduction of graphene oxide (GO) and reveals the effects of alkaline-earth metals (AEMs) in recovering the graphene. These metals are highly effective in removing residual oxygen groups resistive to thermal reduction, as well as healing the defects formed during the reduction, such as the carbonyl groups. In the AEM-assisted...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.