Showing papers by "Ying Dai published in 2003"
TL;DR: In this article, the effect of surface passivants fluorine (F), chlorine (Cl), oxygen (O) and oxygen-related OH on the energy band edge states of clusters with the same Si 29 and Si 47 core was studied by means of the atomic cluster model and density functional theory.
35 citations
TL;DR: In this article, the authors deduced two possible mechanisms for surface conductivity in diamond: one originates from the transport of electron in the localized states near the Fermi level, and another one from the holes in the extended states at about the mobility edge.
16 citations
TL;DR: In this article, the electronic structure of a series of diamond clusters has been calculated by means of density functional theory method, and some interesting properties of P doping have been found, such as the donor level induced by P is shallower for the larger cluster than for the smaller cluster.
Abstract: To investigate the n-type doping with phosphorous (P) in diamond, the electronic structure of a series of diamond clusters has been calculated by means of density functional theory method. From the results, we have found some of interesting properties of P doping. Firstly, the n-type doping behavior with P in diamond is very similar to that in silicon. Secondly, the donor level induced by P is shallower for the larger cluster than for the smaller cluster. Lastly, the phosphorous-dangling-bond complex is one of the factors defining the donor level position if dangling bonds (DBs) exist in samples. These findings may well explain some of experimental data of n-type materials doped with P.
4 citations
TL;DR: In this article, the authors synthesize AlN nanocrystalline and platelets by the nitr idation of Al and C powders in a nitrogen atmosphere, and the morphologies of the nitridation product are controlled by the composition ratio of Al/C.
Abstract: AlN nanocrystalline and platelets are synthesized by the nitr idation of Al and C powders in a nitrogen atmosphere. The grain size of nanocrystalline powders i s about 20-50 nm. Hexagonal platelets AlN are 2-4 μm in diameter and 0.5-1 μm in thickness. The morphologies of the nitridation product are controlled by the composition ratio of Al/C. The nitridati on mechanism of Al powders in the process is analyzed.
4 citations