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 ...
详细信息
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
Fluid flow in the mold has a significant impact on the quality of continuously cast steel *** it is strongly influenced by the SEN design,attention has to be paid on its *** this paper the main principles of a novel S...
详细信息
Fluid flow in the mold has a significant impact on the quality of continuously cast steel *** it is strongly influenced by the SEN design,attention has to be paid on its *** this paper the main principles of a novel SEN type will be *** modeling and Computational Fluid Dynamics(CFD)are applied to characterize the flow pattern under different ***,the interaction with electromagnetic stirring(M-EMS)is analyzed by means of a liquid melt ***,actual steel plant performance data and observations are discussed.
暂无评论