Alloy-assisted deposition of three-dimensional arrays of atomic gold catalyst for crystal growth studies
- Univ. of Chicago, IL (United States). Dept. of Chemistry; Univ. of Chicago, IL (United States). James Franck Inst.
- Argonne National Lab. (ANL), Argonne, IL (United States). X-Ray Science Division
- Univ. of Illinois, Chicago, IL (United States). Research Resources Center
- Univ. of Chicago, IL (United States). Dept. of Chemistr
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering; Northwestern Univ., Evanston, IL (United States). Center for Atom-Probe Tomography (NUCAPT)
- Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials; Univ. of Chicago, IL (United States). Computation Inst.
- Univ. of Chicago, IL (United States). Dept. of Chemistry; Univ. of Chicago, IL (United States). James Franck Inst., and Inst. for Biophysical Dynamics
Large-scale assembly of individual atoms over smooth surfaces is difficult to achieve. A configuration of an atom reservoir, in which individual atoms can be readily extracted, may successfully address this challenge. In this work, we demonstrate that a liquid gold-silicon alloy established in classical vapor-liquid-solid growth can deposit ordered and three-dimensional rings of isolated gold atoms over silicon nanowire sidewalls. Here, we perform ab initio molecular dynamics simulation and unveil a surprising single atomic gold-catalyzed chemical etching of silicon. Experimental verification of this catalytic process in silicon nanowires yields dopant-dependent, massive and ordered 3D grooves with spacing down to similar to 5 nm. Finally, we use these grooves as self-labeled and ex situ markers to resolve several complex silicon growths, including the formation of nodes, kinks, scale-like interfaces, and curved backbones.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); National Institutes of Health (NIH); Alfred P. Sloan Foundation; US Department of the Navy, Office of Naval Research (ONR)
- Grant/Contract Number:
- AC02-06CH11357; AC02-05CH11231
- OSTI ID:
- 1425219
- Journal Information:
- Nature Communications, Vol. 8, Issue 1; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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