In-situ liquid-cell TEM study of radial flow-guided motion of octahedral Au nanoparticles and nanoparticle clusters
作者: Chang LiXin ChenHaiyang LiuJiali FangXiaoqin Zhou
作者单位: 1School of Materials Science and Engineering, East China University of Science and Technology
2Key Laboratory for Ultrafine Materials of Ministry of Education and Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology
刊名: Nano Research, 2018, Vol.11 (9), pp.4697-4707
来源数据库: Springer Journal
DOI: 10.1007/s12274-018-2052-6
关键词: In situ transmission electron microscopy (TEM)NanoparticlesNanoassemblingNanoscale fluidsTrapping force
英文摘要: Abstract(#br)The dynamic behavior of octahedral gold nanoparticles (NPs) and nanoparticle clusters (NPCs) in aqueous solution is studied by in-situ liquid-cell transmission electron microscopy (TEM). The octahedral Au NPs/NPCs show preferential orientations in the liquid cell, due to the interaction with the SiN x window. The Au NPs show long-range reversible hopping and three-dimensional (3D) rotational motions in the liquid environment. At the same time, the Au NPCs and NPs perform slow stick-slip and stick-roll motions, respectively, with a centripetal trend. The centripetal motions were explained by a liquid evaporation-induced radial flow model, in which the NPCs/NPs trajectories are controlled by Stokes forces and surface friction by the silicon nitride window. The calculated...
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影响因子:7.392 (2012)

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