نتایج جستجو برای: graphene ribbon
تعداد نتایج: 54334 فیلتر نتایج به سال:
Submitted for the MAR09 Meeting of The American Physical Society Rashba spin-orbit interactions in zigzag graphene nano-ribbons1 MAHDI ZAREA, Ohio Univesity, NANCY SANDLER, Ohio University — The crystalline structure of graphene can be described in terms of a pseudo-spin degree of freedom and spinor wavefunctions. This characteristic has important physical consequences not observed in normal se...
In this study, the exergy analysis of graphene-based nanofluids in a compact heat exchanger is examined. experiments using distilled water as base fluid, graphene nano-ribbon and oxide were used at 0.01% 0.02% volume concentrations. The carried out 36, 40, 44 oC fluid inlet temperatures 0.6, 0.7, 0.8, 0.9 m3/h mass flow rates. As result calculations made for all temperature rates, it was found ...
We present the electron transport in graphene nanoribbons (GNRs) at high electric bias conduction. When graphene is patterned into a few tens of nanometer width of a ribbon shape, the carriers are confined to a quasi-one-dimensional (1D) system. Combining with the disorders in the system, this quantum confinement can lead into a transport gap in the energy spectrum of the GNRs. Similar to CNTs,...
Different types of crystalline carbon nanomaterials were used to reinforce polyaniline for use in electromechanical bilayer bending actuators. The objective is to analyze how the different graphitic structures of the nanocarbons affect and improve the in situ polymerized polyaniline composites and their subsequent actuator behavior. The nanocarbons investigated were multiwalled carbon nanotubes...
The mechanical behavior and properties of multilayer graphene sheets and nanoribbons have been a subject of intensive research in recent years, due to their potential in electronic, structural and thermal applications. Calculations of effective properties range from molecular dynamic simulations to use of structural mechanical continuum models. Here, structural and elastic parameters are obtain...
The many desirable material properties of the novel graphene films, including ultra-high mobility, high saturation velocity, high current carrying capability, excellent thermal conductivity, ultra-thin geometry, and the feature to integrate with traditional CMOS processes, offer the potential for graphene-based electronics. Since the bandgap of semiconducting GNRs is inversely proportional to t...
A theory of electron states for graphene nanoribbons with a smoothly varying width is developed. It is demonstrated that the standard adiabatic approximation allowing to neglect the mixing of different standing waves is more restrictive for the massless Dirac fermions in graphene than for the conventional electron gas. In general, one can expect a well-pronounced conductance quantization only f...
In the electronics industry, scaling and optimization is final goal. But, according to ITRS predictions, silicon as basic material for semiconductors, is facing physical limitation and approaching the end of the path. Therefore, researchers are looking for the silicon replacement. Until now, carbon and its allotrope, graphene, look to be viable candidates. Among different circuits, IO block is ...
In this study, nano tube modular is utilized to create a graphene nano-ribbon structure with n=m=4 and length of 1 nm. For the display system, export Gaussian 5.0 version. The input data then exported 09, which used calculate geometrical electrical parameters, as well adsorption energy. ground state parameters were computed using DFT approach, was dependent on electron density. Higher Occupied ...
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