Atomic Scale Imaging of Nucleation and Growth Trajectories of an Interfacial Bismuth Nanodroplet
Li, YX (Li, Yingxuan); Bunes, BR (Bunes, Benjamin R.); Zang, L (Zang, Ling); Zhao, J (Zhao, Jie); Li, Y (Li, Yan); Zhu, YQ (Zhu, Yunqing); Wang, CY (Wang, Chuanyi); Li, YX
2016
发表期刊ACS NANO
卷号10期号:2页码:2386-2391
摘要Because of the lack of experimental evidence, much confusion still exists on the nucleation and growth dynamics of a nanostructure, particularly of metal. The situation is even worse for nano droplets because it is more difficult to induce the formation of a nanodroplet while imaging the dynamic process with atomic resolution. Here, taking advantage of an electron beam to induce the growth of Bi nanodroplets on a SrBi2Ta2O9 platelet under a high resolution transmission electron microscope (HRTEM), we directly observed the detailed growth pathways of Bi nanodroplets from the earliest stage of nucleation that were previously inaccessible. Atomic scale imaging reveals that the dynamics of nucleation involves a much more complex trajectory than previously predicted based on classical nucleation theory (CNT). The monatomic Bi layer was first formed in the nucleation process, which induced the formation of the prenucleated clusters. Following that, critical nuclei for the nanodroplets formed both directly from the addition of atoms to the prenucleated clusters by the classical growth process and indirectly through transformation of an intermediate liquid film based on the Stranski-Krastanov growth mode, in which the liquid film was induced by the self-assembly of the prenucleated clusters. Finally, the growth of the Bi nanodroplets advanced through the classical pathway and sudden droplet coalescence. This study allows us to visualize the critical steps in the nucleation process of an interfacial nanodroplet, which suggests a revision of the perspective of CNT.
关键词In Situ imagIng Atomic Resolution Bi Nanodroplet Nucleation Growth
DOI10.1021/acsnano.5b07197
收录类别SCI
WOS记录号WOS:000370987400079
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被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/4354
专题中国科学院特殊环境功能材料与器件重点试验室
通讯作者Li, YX
作者单位Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China;Univ Utah, Nano Inst Utah, Salt Lake City, UT 84112 USA;Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
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Li, YX ,Bunes, BR ,Zang, L ,et al. Atomic Scale Imaging of Nucleation and Growth Trajectories of an Interfacial Bismuth Nanodroplet[J]. ACS NANO,2016,10(2):2386-2391.
APA Li, YX .,Bunes, BR .,Zang, L .,Zhao, J .,Li, Y .,...&Li, YX.(2016).Atomic Scale Imaging of Nucleation and Growth Trajectories of an Interfacial Bismuth Nanodroplet.ACS NANO,10(2),2386-2391.
MLA Li, YX ,et al."Atomic Scale Imaging of Nucleation and Growth Trajectories of an Interfacial Bismuth Nanodroplet".ACS NANO 10.2(2016):2386-2391.
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