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2D spherulites of a semi-fluorinated alkane: controlled access to either radial or ring-banded morphologies

Thin films of a semi-fluorinated alkane cast onto solid substrates consist of well-formed two-dimensional non-birefringent ring-banded and/or radial spherulites. Controlling the experimental conditions allows orientation of the crystallization toward either radial-only or ring-banded-only morphologi...

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Bibliographic Details
Main Authors: Liu, Xianhe (Author) , Mielke, Salomé (Author) , Tanaka, Motomu (Author)
Format: Article (Journal)
Language:English
Published: 2018
In: ChemPhysChem
Year: 2017, Volume: 19, Issue: 1, Pages: 29-33
ISSN:1439-7641
DOI:10.1002/cphc.201701064
Online Access:Verlag, Volltext: http://dx.doi.org/10.1002/cphc.201701064
Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/cphc.201701064
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Author Notes:Xianhe Liu, Salomé Mielke, Christophe Contal, Damien Favier, Akihisa Yamamoto, Motomu Tanaka, and Marie Pierre Krafft
Description
Summary:Thin films of a semi-fluorinated alkane cast onto solid substrates consist of well-formed two-dimensional non-birefringent ring-banded and/or radial spherulites. Controlling the experimental conditions allows orientation of the crystallization toward either radial-only or ring-banded-only morphologies. Intermediate states were also captured in which both radial and ring-banded spherulites coexist. Monitoring of the formation of these intermediate states brought evidence for a first crystallization mode that sweeps radially outwards from a central nucleus until the propagating front edge experiences a second crystallization mode that proceeds through a diffusion-controlled rhythmic crystallization mechanism that leads to high (≈2 μm) concentric ridges. These 2D spherulites were investigated by optical and atomic force microscopies, interferometric profilometry, and off-specular neutron scattering.
Item Description:Gesehen am 16.10.2018
First published: 23 October 2017
Physical Description:Online Resource
ISSN:1439-7641
DOI:10.1002/cphc.201701064

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