金红石
材料科学
纳米颗粒
纳米结构
氧化物
八面体
氧化钼
钼
纳米技术
金属
对分布函数
化学物理
化学工程
结晶学
晶体结构
化学
冶金
数学分析
工程类
数学
作者
Troels Lindahl Christiansen,Espen Drath Bøjesen,Mikkel Juelsholt,Joanne Etheridge,Kirsten M. Ø. Jensen
出处
期刊:ACS Nano
[American Chemical Society]
日期:2019-07-30
卷期号:13 (8): 8725-8735
被引量:23
标识
DOI:10.1021/acsnano.9b01367
摘要
Nanosizing of metal oxide particles is a common strategy for improving materials properties; however, small particles often take structures different from the bulk material. MoO2 nanoparticles show a structure that is distinct from the bulk distorted rutile structure and which has not yet been determined. Here, we present a model for nanostructured MoO2 obtained through detailed atomic pair distribution function analysis combined with high-resolution electron microscopy. Defects occur in the arrangement of [MoO6] octahedra, in both large (40-100 nm) nanoparticles, where the overall distorted rutile structure is preserved, and in small nanoparticles (<5 nm), where a new nanostructure is formed. The study provides a piece in the puzzle of understanding the structure/properties relationship of molybdenum oxides and further our understanding of the origin of structural changes taking place upon nanosizing in oxide materials.
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