On the Role of Nanometer Scale Structure on Interfacial Energy
Name
Kuna On_the_Role_of_Nanometer.pdf
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3.05 MB
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Checksum (MD5)
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Author(s)
Kuna, Jeffrey James
Voitchovsky, Kislon
Stellacci, Francesco
Singh, Chetana
Jiang, Hao
Mwenifumbo, Steve
Ghorai, Pradip K.
Stevens, Molly M.
Glotzer, Sharon C.
Alternative Title
The effect of nanometre-scale structure on interfacial energy
Date Issued
September 2009
Journal
Nature Materials
Publisher
Nature Publishing Group
Citation
Kuna, Jeffrey J. et al. “The effect of nanometre-scale structure on interfacial energy.” Nat Mater 8.10 (2009): 837-842.
Version
Author's final manuscript
Abstract
Natural surfaces are often structured with nanometre-scale domains, yet a framework providing a quantitative understanding of how nanostructure affects interfacial energy, gammaSL, is lacking. Conventional continuum thermodynamics treats gammaSL solely as a function of average composition, ignoring structure. Here we show that, when a surface has domains commensurate in size with solvent molecules, gammaSL is determined not only by its average composition but also by a structural component that causes gammaSL to deviate from the continuum prediction by a substantial amount, as much as 20% in our system. By contrasting surfaces coated with either molecular (<2 nm) or larger scale domains (>5 nm), we find that while the latter surfaces have the expected linear dependence of gammaSL on surface composition, the former exhibit a markedly different non-monotonic trend. Molecular dynamics simulations show how the organization of the solvent molecules at the interface is controlled by the nanostructured surface, which in turn appreciably modifies gammaSL.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1038/nmat2534
