Research on preparation of low-dimensional metallic and semiconducting nanostructures and their quantum properties

为了研究和理解由激发态产生的结构和量子特性，开发了具有0、1和2维结构的金属或半导体纳米结构的制备方法。通过位置、元素和方向选择的原子操纵，通过电子激发和原子碰撞位移的组合来形成纳米结构。纳米粒子中量子尺寸效应引起的光致发光机制可以用金属纳米粒子中的金属-非金属跃迁或间接跃迁半导体纳米粒子中的准直接电子跃迁来解释

Preparation methods for metallic or semiconducting nanostructures with 0-, 1-and 2-dimensional structures have been developed in order to research and understand the structural and quantum properties originated from excited states. Formations of nanostructures by site-, element-and direction-selective atomic manipulations have been carried out by a combination of electronic excitations and knock-on atomic displacements. The mechanisms of photoluminescence induced by quantum size effects in nanoparticles can be interpreted by metal-nonmetal transition in metallic nanoparticles or by quasi-direct electronic transition in indirect transition semiconducting nanoparticles