The scattering of plane time-harmonic electromagnetic waves propagating in a homogeneous chiral environment by a perfectly conducting grating is studied.The problem is simplified to a two-dimensional scattering proble...The scattering of plane time-harmonic electromagnetic waves propagating in a homogeneous chiral environment by a perfectly conducting grating is studied.The problem is simplified to a two-dimensional scattering problem,and the existence and uniqueness of solutions are discussed by an integral equation approach.展开更多
Tropos phosphine-oxazoline ligands have shown interesting coordination behavior and excellent chiral inducing ability in asymmetry catalysis.Here we present a convenient and economic route for the synthesis of this ty...Tropos phosphine-oxazoline ligands have shown interesting coordination behavior and excellent chiral inducing ability in asymmetry catalysis.Here we present a convenient and economic route for the synthesis of this type of ligands.According to this new route,the ligands with different electronic and steric properties have been prepared successfully.展开更多
In present paper, the non-equilibrium Green function(NEGF) method along with the density functional theory(DFT) are used to investigate the effect of width on transport and electronic properties of armchair graphyne(...In present paper, the non-equilibrium Green function(NEGF) method along with the density functional theory(DFT) are used to investigate the effect of width on transport and electronic properties of armchair graphyne(γ-graphyne) nanoribbons. The results show that all the studied nanoribbons are semiconductor and their band gaps decrease as the widths of nanoribbons increase, which will result in increasing current at a certain voltage. Also our results show the promising application of armchair graphyne nanoribbons in nano-electrical devices.展开更多
文摘The scattering of plane time-harmonic electromagnetic waves propagating in a homogeneous chiral environment by a perfectly conducting grating is studied.The problem is simplified to a two-dimensional scattering problem,and the existence and uniqueness of solutions are discussed by an integral equation approach.
基金supported by the National Natural Science Foundation of China (20772081)Science and Technology Commission of Shanghai Municipality (09431902500)
文摘Tropos phosphine-oxazoline ligands have shown interesting coordination behavior and excellent chiral inducing ability in asymmetry catalysis.Here we present a convenient and economic route for the synthesis of this type of ligands.According to this new route,the ligands with different electronic and steric properties have been prepared successfully.
文摘In present paper, the non-equilibrium Green function(NEGF) method along with the density functional theory(DFT) are used to investigate the effect of width on transport and electronic properties of armchair graphyne(γ-graphyne) nanoribbons. The results show that all the studied nanoribbons are semiconductor and their band gaps decrease as the widths of nanoribbons increase, which will result in increasing current at a certain voltage. Also our results show the promising application of armchair graphyne nanoribbons in nano-electrical devices.
