搜索结果: 91-105 共查到“理学 graphene”相关记录121条 . 查询时间(0.046 秒)
Modulation of the thermodynamic, kinetic and magnetic properties of the hydrogen monomer on graphene by charge doping
Modulation of the thermodynamic kinetic magnetic properties graphene by charge doping
2010/11/23
The thermodynamic, kinetic and magnetic properties of the hydrogen monomer on doped graphene layers were studied by ab initio simulations. Electron doping was found to heighten the diffusion potential...
We demonstrate a wideband-tunable Q-switched fiber laser exploiting a graphene saturable absorber.We get2μs pulses, tunable between 1522 and 1555nm with up to40nJ energy. This is a simple and low-co...
Seunghyun Lee, Kyunghoon Lee, Zhaohui Zhong Wafer Scale Homogeneous Bilayer Graphene Films by Chemical Vapor Deposition
Graphene, bilayer chemical vapor deposition wafer scale bandgap opening
2010/11/24
The discovery of electric field induced bandgap opening in bilayer graphene opens new door for making semiconducting graphene without aggressive size scaling or using expensive substrates. However, bi...
First-principles modeling of the interactions of iron impurities with graphene and graphite
First-principles modeling of the interactions graphene graphite
2010/11/19
Results of first principles modelling of interactions graphene and graphite with iron
impurities predict the colossal difference between these two carbon allotropes. Insertion
of the iron atoms betw...
Nernst and Seebeck effect in a graphene nanoribbon
Nernst Seebeck effect graphene nanoribbon
2010/11/22
The thermoelectric power, including the Nernst and Seebeck effects, in graphene nanoribbon is studied. By using the non-equilibrium Green function combining with the tight-binding Hamiltonian, the Ner...
Enhanced stability of hydrogen atoms at the graphene/graphane interface of nanoribbons
Enhanced stability of hydrogen atoms graphene/graphane interface of nanoribbons
2010/11/24
The thermal stability of graphene/graphane nanoribbons (GGNRs) is investigated using density functional theory. It is found that the energy barriers for the diffusion of hydrogen atoms on the zigzag a...
Edge stability, reconstruction, zero-energy states and magnetism in triangular graphene quantum dots with zigzag edges
Edge stability zero-energy states magnetism
2010/11/17
We present the results of ab-initio density functional theory based calculations of the stability and reconstruction of zigzag edges in triangular graphene quantum dots. We show that, while the recons...
Localized in-situ polymerization on graphene surfaces for stabilized graphene dispersions
Localized in-situ polymerization graphene surfaces stabilized graphene dispersions
2010/11/18
We demonstrate a novel in situ polymerization technique to develop localized polymer coatings on the surface of dispersed pristine graphene sheets. Graphene sheets show great promise as strong, conduc...
Amplified Stimulated Terahertz Emission at Room temperature from Optically Pumped Graphene
Amplified Stimulated Terahertz Emission Room temperature Optically Pumped Graphene
2010/11/22
Room temperature Terahertz stimulated emission and population inversion in optically
pumped graphene is reported. We experimentally observe fast relaxation and relatively slow recombination dynamics ...
Growth of Large-Area Graphene Films from Metal-Carbon Melts
Single Layer Graphene Crystal Growth Binary Phases Raman Spectroscopy wrinkles
2010/11/24
We have demonstrated a new method for the large-area graphene growth, which can lead to a scalable low-cost high-throughput production technology. The method is based on growing single-layer or few-la...
We develop a theory for the compressibility and quantum capacitance of disordered monolayer
and bilayer graphene including the full hyperbolic band structure and band gap in the latter case.We includ...
The thermodynamic and kinetic properties of hydrogen dimers on graphene
thermodynamic kinetic properties graphene
2010/11/23
The thermodynamic and kinetic properties of hydrogen adatoms on graphene are important to the materials and devices based on hydrogenated graphene. Hydrogen dimers on graphene with coverages varying f...
Color-dependent conductance of graphene with adatoms
Color-dependent conductance graphene with adatoms
2010/11/24
We study ballistic transport properties of graphene with a low concentration of vacancies or
adatoms. The conductance of graphene doped to the Dirac point is found to depend on the relative distribut...
Evolution of Microscopic Localization in Graphene in a Magnetic Field from Scattering Resonances to Quantum Dots
Evolution of Microscopic Localization Scattering Resonances Quantum Dots
2010/11/18
Graphene is a unique two–dimensional material with rich new physics and great promise for applications in electronic devices. Physical phenomena such as the half-integer quantum Hall effect and high c...
Existence condition and range of Dirac points in deformed graphene
Existence condition range of Dirac points deformed graphene
2010/11/23
Owing to some anisotropic deformations, hopping energies t1,2,3 of graphene will be changed,
and their corresponding Dirac points can be shifted or even annihilated.