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Effect of interaction of external surfaces on the symmetry and lattice distortion of CdSe nanocrystals by molecular dynamics simulations

机译:分子动力学模拟研究外表面相互作用对CdSe纳米晶对称性和晶格畸变的影响

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摘要

The effect of interaction of low-index atomic planes, (100), (110), and (111) terminating CdSe platelet nanocrystals is examined using molecular dynamics (MD) simulations. Asymmetry of the environment of atoms at the end surface layers leads to anisotropic deformation of the cubic lattice and to a relative shift of Cd and Se sub-lattices. Interference of distortions of the crystal lattice originating at the terminal surfaces leads to changes of symmetry of the CdSe lattice in the whole sample volume. In the models, 2–3 nm thick, for all types of surfaces under examination, the initial cubic lattice symmetry gets lost in the whole sample volume. >Graphical abstract
机译:使用分子动力学(MD)模拟检查了低折射率原子平面(100),(110)和(111)终止的CdSe血小板纳米晶体相互作用的影响。端面层原子环境的不对称会导致立方晶格发生各向异性变形,并导致Cd和Se子晶格发生相对移动。源自末端表面的晶格畸变的干扰导致整个样品体积中CdSe晶格的对称性变化。在厚度为2-3 nm的模型中,对于所有类型的被检查表面,最初的立方晶格对称性在整个样品体积中都消失了。 <!-fig ft0-> <!-fig @ position =“ anchor” mode =文章f4-> <!-fig mode =“ anchred” f5-> >图形摘要<!- fig / graphic | fig / alternatives / graphic mode =“ anchored” m1-> <!-标题a7->ᅟ

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