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Dehydration-mediated cluster formation of nanoparticles SCIE SCOPUS

Title
Dehydration-mediated cluster formation of nanoparticles
Authors
Ahn, SLee, SJ
Date Issued
2015-06-16
Publisher
Nature Publishing Group
Abstract
Drying procedure is a powerful method to modulate the bottom-up assembly of basic building component. The initially weak attraction between the components screened in a solution strengthens as the solvent evaporates, organizing the components into structures. Drying is process-dependent, irreversible, and nonequilibrated, thus the mechanism and the dynamics are influenced by many factors. Therefore, the interaction of the solvent and the elements during the drying procedure as well as the resulting pattern formations are strongly related. Nonetheless still many things are open in questions in terms of their dynamics. In this study, nanoscale dehydration procedure is experimentally investigated using a nanoparticle (NP) model system. The role of water is verified in a single NP scale and the patterns of collective NP clusters are determined. Stepwise drying procedures are proposed based on the location from which water is removed. Effective water exodus from a unit NP surface enhances the attractive interaction in nanoscale and induces heterogeneous distribution in microscale. This study provides fundamental proof of systematic relation between the dehydration process and the resultant cluster patterns in hierarchical multiscales.
URI
https://oasis.postech.ac.kr/handle/2014.oak/36239
DOI
10.1038/SREP11383
ISSN
2045-2322
Article Type
Article
Citation
Scientific Reports, vol. 5, page. 11383, 2015-06-16
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이상준LEE, SANG JOON
Dept of Mechanical Enginrg
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