-
1
المؤلفون: Zheng Yan, Zhiwei Peng, Gilberto Casillas, Jian Lin, Changsheng Xiang, Haiqing Zhou, Yang Yang, Gedeng Ruan, Abdul-Rahman O. Raji, Errol L. G. Samuel, Robert H. Hauge, Miguel Jose Yacaman, James M. Tour
المصدر: ACS Nano
ACS nano, vol 8, iss 5مصطلحات موضوعية: Boron Compounds, Polymers, Surface Properties, General Physics and Astronomy, Stress, Spectrum Analysis, Raman, Electron, Article, chemical vapor deposition, synergistic effect, Microscopy, Electron, Transmission, SWCNTs, Nickel, Materials Testing, Transmission, Nanotechnology, Scanning, General Materials Science, Nanoscience & Nanotechnology, Particle Size, Raman, Electrodes, Microscopy, Nanotubes, free-standing, Nanotubes, Carbon, Spectrum Analysis, Electric Conductivity, General Engineering, Water, Mechanical, Carbon, Metals, Spectrophotometry, reinforced graphene, Microscopy, Electron, Scanning, Graphite, Stress, Mechanical, Crystallization, Protein Binding
الوصف: As the cylindrical sp(2)-bonded carbon allotrope, carbon nanotubes (CNTs) have been widely used to reinforce bulk materials such as polymers, ceramics, and metals. However, both the concept demonstration and the fundamental understanding on how 1D CNTs reinforce atomically thin 2D layered materials, such as graphene, are still absent. Here, we demonstrate the successful synthesis of CNT-toughened graphene by simply annealing functionalized CNTs on Cu foils without needing to introduce extraneous carbon sources. The CNTs act as reinforcing bar (rebar), toughening the graphene through both π-π stacking domains and covalent bonding where the CNTs partially unzip and form a seamless 2D conjoined hybrid as revealed by aberration-corrected scanning transmission electron microscopy analysis. This is termed rebar graphene. Rebar graphene can be free-standing on water and transferred onto target substrates without needing a polymer-coating due to the rebar effects of the CNTs. The utility of rebar graphene sheets as flexible all-carbon transparent electrodes is demonstrated. The in-plane marriage of 1D nanotubes and 2D layered materials might herald an electrical and mechanical union that extends beyond carbon chemistry.
وصف الملف: application/pdf
-
2
المؤلفون: James M. Tour, Lei Li, Abdul-Rahman O. Raji
المصدر: Advanced materials (Deerfield Beach, Fla.). 25(43)
مصطلحات موضوعية: Fabrication, Materials science, Lithium vanadium phosphate battery, Composite number, chemistry.chemical_element, Nanotechnology, Lithium, law.invention, Electric Power Supplies, law, General Materials Science, Electrodes, Ions, Nanocomposite, Graphene, Mechanical Engineering, Oxides, Electrochemical Techniques, Anode, Nanostructures, chemistry, Manganese Compounds, Mechanics of Materials, Graphite, Graphene nanoribbons
الوصف: A facile and cost-effective approach for the fabrication of a hierarchical nanocomposite material of graphene-wrapped MnO2 -graphene nanoribbons (GMG) is developed. The resulting composite has a high specific capacity and an excellent cycling stability owing to the synergistic combination of the electrically conductive graphene, graphene nanoribbons, and MnO2 .
إعادة تعيين المنقحات
عرض المنقحات (%%عد%%)
Find this issue from the American Chemical Society