Controlled growth of single-crystalline metal nanowires via thermomigration across a nanoscale junction
Name
s41467-019-12416-x.pdf
Description
Published version
Size
2.15 MB
Format
Adobe PDF
Checksum (MD5)
34f5ae14727b81a79a768c2b0dde401e
Author(s)
Li, Ju
Date Issued
October 2, 2019
Journal
Nature communications
Publisher
Springer Science and Business Media LLC
Citation
Xie, De-Gang et al. "Controlled growth of single-crystalline metal nanowires via thermomigration across a nanoscale junction." Nature communications 10 (2019): 1038 © 2019 The Author(s)
Version
Final published version
Abstract
Mass transport driven by temperature gradient is commonly seen in fluids. However, here we demonstrate that when drawing a cold nano-tip off a hot solid substrate, thermomigration can be so rampant that it can be exploited for producing single-crystalline aluminum, copper, silver and tin nanowires. This demonstrates that in nanoscale objects, solids can mimic liquids in rapid morphological changes, by virtue of fast surface diffusion across short distances. During uniform growth, a thin neck-shaped ligament containing a grain boundary (GB) usually forms between the hot and the cold ends, sustaining an extremely high temperature gradient that should have driven even larger mass flux, if not counteracted by the relative sluggishness of plating into the GB and the resulting back stress. This GB-containing ligament is quite robust and can adapt to varying drawing directions and velocities, imparting good controllability to the nanowire growth in a manner akin to Czochralski crystal growth.
Subjects
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy
General Chemistry
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/s41467-019-12416-x
