层间作用和线度对球状纳米系统电子能量的影响

建立了考虑层间作用情况下两层球状纳米系统的物理模型，应用格林函数法和傅里叶展开，求出系统电子的势能.以HgS/CdS球状纳米系统为例，讨论了系统线度和层间作用对电子能量的影响.结果表明：层间作用会使电子势垒平均高度比不考虑时有所降低；层间作用愈大，电子势垒高度降低得愈多，电子势能曲线起伏就愈大.层间作用相同时，电子基态能以及层间作用引起的能量修正均随粒子线度增大而减小；而粒子线度相同时，层间作用引起的能量修正却随层间作用的增大而增大. 关键词： 层间作用 线度 HgS/CdS球状纳米系统 电子能量

Influence of layers' mutual effect and radius on electronic energy of spherical nanometric system

On the basis of interaction between layers, the physical model of the bilayer spherical namometric system have been worked out. With the Green function method and Fourier transform, the electronic potential energy has been figured out for the system. In the example of HgS/CdS spherical nanometric system, the effect of system size and the layers' mutual effect has been discussed in terms of the electronic potential energy. The results show that: the layers' mutual effect could make the average height of the electronic potential barrier of the spherical namometric system lower; the more the layers' mutual effect is, the lower the height of the electronic potential barrier is, and the greater the undulation of the electronic potential energy curve is. For the same layers' mutual effect, electronic ground state energy and revised energy by layers' mutual effect will be reduced with the increase of particle radius; but for the same size, the revised energy by layers' mutual effect will increase with the increase of the layers' mutual effect.