Please use this identifier to cite or link to this item: https://doi.org/10.1021/acs.jpclett.9b01563
Title: Growth Dynamics of Gallium Nanodroplets Driven by Thermally Activated Surface Diffusion
Authors: ZHASLAN BARAISSOV 
Federico Panciera 
Laurent Travers
Jean-Christophe Harmand
UTKUR MIRZIYODOVICH MIRSAIDOV 
Keywords: Desorption,Fluxes,Nanodroplets,Cluster chemistry,Nucleation
Issue Date: 2019
Publisher: American Chemical Society
Citation: ZHASLAN BARAISSOV, Federico Panciera, Laurent Travers, Jean-Christophe Harmand, UTKUR MIRZIYODOVICH MIRSAIDOV (2019). Growth Dynamics of Gallium Nanodroplets Driven by Thermally Activated Surface Diffusion. Journal of Physical Chemistry Letters 10 : 5082−5089. ScholarBank@NUS Repository. https://doi.org/10.1021/acs.jpclett.9b01563
Rights: CC0 1.0 Universal
Related Datasets: 10.1021/acs.jpclett.9b01563
Abstract: The growth of catalytic liquid-metal nanodroplets on flat substrates is essential for many technological applications. However, the detailed nucleation and growth dynamics of these nanodroplets remain unclear. Here, using in situ transmission electron microscopy (TEM) imaging, we track in real time the growth of individual Ga nanodroplets from a beam of Ga vapor. We show that the nucleation and growth are driven by thermally activated surface diffusion of Ga adatoms, with the diffusion activation energy of ED = 95 ± 10 meV on a SiNx surface. More importantly, our analysis shows that Ga dimers serve as the critical nucleation clusters and that the nanodroplet growth follows a power-law of the form R(t) ∝ e–ED/kBT(t – t0)1/2. These insights into the growth dynamics of metallic nanodroplets are essential for tailoring their size and density for their application in self-catalyzed growth of nanomaterials.
Source Title: Journal of Physical Chemistry Letters
URI: https://scholarbank.nus.edu.sg/handle/10635/177631
ISSN: 19487185
DOI: 10.1021/acs.jpclett.9b01563
Rights: CC0 1.0 Universal
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