【摘 要】
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A novel scale-out methodology based on core alloying and shell gradient-doping are developed for the surface and interface engineering of nanohybrids,realiz
【机 构】
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School of Mathematics and Physics,University of Science and Technology Beijing,Beijing 100083,P.R.Ch
【出 处】
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The 6th International Conference on Nanoscience and Technolo
论文部分内容阅读
A novel scale-out methodology based on core alloying and shell gradient-doping are developed for the surface and interface engineering of nanohybrids,realized by coupled competitive reactions,or sequenced reducing-nucleation and co-precipitation reaction of mixed metal salts in a programmed microfluidic process.The latent time of nucleation and the growth of nanohybrids can be well controlled due to the formation of controllable intermediates in the coupled competitive reactions.Thus,spatiotemporal-resolved synthesis can be realized by the hybrid process,which enables us to investigate nanohybrid formation at each stage through their solution color changes and TEM images.By adjusting the bi-channel solvents and kinetic parameters at each stage,the primary components of alloyed cores and the second components with transition metal doping ZnSe,ZnS,ZnTe,ZnO,Al2O3 or CeO2 as surface coatings can be successively formed.The core alloying and shell gradient-doping strategy can efficiently eliminate the crystal lattice mismatch in different components.Consequently,varieties of ultra-small(< 5 nm)gradient core-shell nanohybrids can be synthesized using CoM,FeM,AuM,AgM,PtM(M = Ce,Cu,Zn or Al)alloys as cores and transition metal gradient-doping ZnO or Al2O3 as shells,endowing these nanohybrids with unique magnetic,optical and electronic properties(e.g.,high temperature ferromagnetic property and enhanced blue emission).Their applications for high temperature ferromagnetism,tunable photoluminescence,fuel cell catalysis,supercapacitors are further evaluated and discussed.
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