Helium droplet assisted synthesis of plasmonic Ag@ZnO core@shell nanoparticles
氦微滴帮助了 plasmonic Ag@ZnO core@shell nanoparticles 的合成作者机构：Institute of Experimental PhysicsGraz University of TechnologyA-8010GrazAustria Institute of Electron Microscopy and Nanoanalysis&Graz Centre for Electron MicroscopyGraz University of TechnologyA-8010GrazAustria
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2020年第13卷第11期
页 面：2979-2986页
核心收录：
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 070204[理学-等离子体物理] 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：support from the Austrian Science Fund(FWF)under grant P30940-N36 as well as support from NAWI Graz.Further funding for this research was received from the European Union’s Horizon 2020 research program under Grant Agreement No.823717-ESTEEM3.The authors thank Maximilian Lasserus Roman Messner and Martin Schnedlitz for productive discussions and helpful suggestions
主 题：nanoparticle helium droplet plasmonics photoelectrons
摘 要：Plasmonic Ag@ZnO core@shell nanoparticles are formed by synthesis inside helium droplets with subsequent deposition and controlled *** particle size and shape can be controlled from spherical sub-10 nm particles to larger elongated *** advantage of the method is the complete absence of solvents,precursors,and other chemical *** obtained particle morphology and elemental composition have been analyzed by scanning transmission electron microscopy(STEM)and energy dispersive X-ray spectroscopy(EDS).The results reveal that the produced particles form a closed and homogeneous ZnO layer around a 2–3 nm Ag core with a uniform thickness of(1.33±0.15)nm and(1.63±0.31)nm for spherical and wire-like particles,*** results are supported by ultraviolet photoelectron spectroscopy(UPS),which indicates a fully oxidized shell layer for the particles studied by *** plasmonic properties of the produced spherical Ag@ZnO core@shell particles are investigated by two-photon photoelectron(2PPE)*** excitation of the localized surface plasmon resonance in Ag at around 3 eV,plasmonic enhancement leads to the liberation of electrons with high kinetic *** is observed for both Ag and Ag@ZnO particles,showing that even if a Ag cluster is covered by the ZnO layer,a plasmonic enhancement can be observed by photoelectron spectroscopy.
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