Locating Atoms by Observing Crystallographic Phase

通过观察晶体相来定位原子

• 批准号: DP150104483
• 负责人: Prof Joanne Etheridge
• 金额: $ 34.05万
• 依托单位: Monash University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2015
• 资助国家: 澳大利亚
• 起止时间: 2015-04-30 至 2020-12-08
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP150104483
• 关键词: Locating; Atoms; Observing; Crystallographic; Phase

Atomic structures are determined by measuring how they scatter radiation. However half of the necessary information, the crystallographic phase, cannot be measured from the scattered intensity. For a century the only option has been to deduce the phase via the statistical analysis of thousands of intensity measurements. This project aims to develop a method to determine atomic structures from the direct observation of phase. From a handful of observations and no formal measurements, atoms can be located with picometre precision. It is predicted that this method will be direct, rapid and unequivocal, sensitive to light atoms and applicable to nanostructures, which will represent a paradigm shift in crystallography.

原子结构是通过测量它们散射辐射的方式来确定的。然而，必要信息的一半，即晶体学阶段，不能从散射强度中测量。一个世纪以来，唯一的选择是通过对数千个强度测量值的统计分析来推断阶段。该项目旨在开发一种从直接观察相的方法来确定原子结构的方法。从少数观测值和没有正式测量的观测值，原子可以以cicometre精度找到。据预测，该方法将是直接，快速且明确的，对光原子敏感并适用于纳米结构，这将代表晶体学的范式转移。