Multidimensional thermally-induced transformation of nest-structured complex Au-Fe nanoalloys towards equilibrium
作者机构：Technical Chemistry I and Center for Nanointegration Duisburg-Essen(CENIDE)University of Duisburg-EssenEssen 45141Germany Inorganic Chemistry and Center for Nanointegration Duisburg-Essen(CENIDE)University of Duisburg-EssenEssen 45141Germany Institute for Materials ScienceSynthesis and Real StructureKiel UniversityKiel 24143Germany University Grenoble AlpesCNRSLiPhyGrenoble 38000France Max-Planck-Institut fur Eisenforschurtg GmbHDiisseldorf40237Germany Department of MaterialsRoyal School of MineImperial College LondonLondon SW72AZUK
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第1期
页 面：581-592页
核心收录：
学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：the German Research Foundation (DFG) project the financial support from ERC-CoG-SHINE
主 题：nanoparticles in situ atom probe tomography diffusion recrystallization atomistic simulation
摘 要：Bimetallic nanoparticles are often superior candidates for a wide range of technological and biomedical applications owing to their enhanced catalytic,optical,and magnetic properties,which are often better than their monometallic *** of their properties strongly depend on their chemical composition,crystallographic structure,and phase ***,little is known of how their crystal structure,on the nanoscale,transforms over time at elevated temperatures,even though this knowledge is highly relevant in case nanoparticles are used in,e.g.,high-temperature ***-Fe is a promising bimetallic system where the low-cost and magnetic Fe is combined with catalytically active and plasmonic ***,we report on the in s/fi;temporal evolution of the crystalline ordering in Au-Fe nanoparticles,obtained from a modern laser ablation in liquids *** in-depth analysis,complemented by dedicated atomistic simulations,includes a detailed structural characterization by X-ray diffraction and transmission electron microscopy as well as atom probe tomography to reveal elemental distributions down to a single atom *** show that the Au-Fe nanoparticles initially exhibit highly complex internal nested nanostructures with a wide range of compositions,phase distributions,and size-depended *** elevated temperature induces a diffusion-controlled recrystallization and phase merging,resulting in the formation of a single face-centered-cubic ultrastructure in contact with a body-centered cubic phase,which demonstrates the metastability of these *** these unique nanostructures with nested features could be highly attractive from a fundamental viewpoint as they could give further insights into the nanoparticle formation mechanism under non-equilibrium ***,the in situ evaluation of the crystal structure changes upon heating is potentially relevant for high-temperature process utilization of bimetallic na
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