Kinetic Growth Regimes of Hydrothermally Synthesized Potassium Tantalate Nanoparticles
Abstract
A general mathematical kinetic growth model is proposed on the basis of observed growth regimes of hydrothermally synthesized KTaO3 nanoparticles from electron microscopy studies on the surface morphology and surface chemistry. Secondary electron imaging demonstrated that there are two dominant growth mechanisms: terrace nucleation, where the surfaces are rough, and terrace growth, where surfaces are smooth. In the proposed model based upon standard step-flow growth, the rates of both mechanisms are established to be dependent on the chemical potential change of the growth environment-terrace nucleation dominates with larger negative chemical potential, and terrace growth dominates with smaller negative chemical potential. This analysis illustrates the importance of ending a synthesis in a regime of low negative chemical potential in order to achieve smooth well-faceted nanoparticles.
- Authors:
-
- Northwestern Univ., Evanston, IL (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1508965
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 18; Journal Issue: 8; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; growth; kinetics; model; nanoparticles; shape; surfaces; synthesis
Citation Formats
Ly, Tiffany, Wen, Jianguo, and Marks, Laurence D. Kinetic Growth Regimes of Hydrothermally Synthesized Potassium Tantalate Nanoparticles. United States: N. p., 2018.
Web. doi:10.1021/acs.nanolett.8b02123.
Ly, Tiffany, Wen, Jianguo, & Marks, Laurence D. Kinetic Growth Regimes of Hydrothermally Synthesized Potassium Tantalate Nanoparticles. United States. https://doi.org/10.1021/acs.nanolett.8b02123
Ly, Tiffany, Wen, Jianguo, and Marks, Laurence D. Thu .
"Kinetic Growth Regimes of Hydrothermally Synthesized Potassium Tantalate Nanoparticles". United States. https://doi.org/10.1021/acs.nanolett.8b02123. https://www.osti.gov/servlets/purl/1508965.
@article{osti_1508965,
title = {Kinetic Growth Regimes of Hydrothermally Synthesized Potassium Tantalate Nanoparticles},
author = {Ly, Tiffany and Wen, Jianguo and Marks, Laurence D.},
abstractNote = {A general mathematical kinetic growth model is proposed on the basis of observed growth regimes of hydrothermally synthesized KTaO3 nanoparticles from electron microscopy studies on the surface morphology and surface chemistry. Secondary electron imaging demonstrated that there are two dominant growth mechanisms: terrace nucleation, where the surfaces are rough, and terrace growth, where surfaces are smooth. In the proposed model based upon standard step-flow growth, the rates of both mechanisms are established to be dependent on the chemical potential change of the growth environment-terrace nucleation dominates with larger negative chemical potential, and terrace growth dominates with smaller negative chemical potential. This analysis illustrates the importance of ending a synthesis in a regime of low negative chemical potential in order to achieve smooth well-faceted nanoparticles.},
doi = {10.1021/acs.nanolett.8b02123},
journal = {Nano Letters},
number = 8,
volume = 18,
place = {United States},
year = {Thu Jul 05 00:00:00 EDT 2018},
month = {Thu Jul 05 00:00:00 EDT 2018}
}
Web of Science
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