Shape stabilisation of ultrathin nanowires by core material, ligand shell, and environment

核材料、配体壳和环境对超细纳米线形状的稳定

• 批准号: 511445611
• 负责人: Professor Dr. Tobias Kraus
• 金额: --
• 依托单位: Leibniz-Institut für Neue Materialien gGmbH (INM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/511445611?language=en
• 关键词: Shape; stabilisation; ultrathin; nanowires; core

Ultrathin nanowires of metals and semiconductors with diameters of only few tens of atoms can be produced using modern chemical syntheses. They are interesting building blocks for novel materials and devices, but tend to change shape. The nanowires spontaneously decay into spheres of equal volume, thus reducing their surface area. This "Rayleigh Plateau instability" is apparently suppressed by the organic shells that form around the inorganic core during chemical synthesis. We investigate the stabilization mechanism experimentally and compare nanowires of gold and of bismuth sulfide, which we can prepare with very similar geometry. The goal is to understand the stabilization and decay mechanisms and to investigate the influence of the core material, the molecular structure of the ligand shell, and the solvent.

用现代化学合成法可以制造出直径只有几十个原子的超薄金属和半导体纳米线。它们是新材料和设备的有趣构建块，但往往会改变形状。纳米线自发地衰减成等体积的球体，从而减少了它们的表面积。这种“瑞利平台不稳定性”显然被化学合成过程中在无机核周围形成的有机壳抑制。我们研究的稳定机制实验和比较纳米线的金和硫化铋，我们可以准备非常相似的几何形状。目标是了解稳定和衰变机制，并研究核心材料，配体壳的分子结构和溶剂的影响。