"Self-Shaping" of Multicomponent Drops

Langmuir : the ACS Journal of Surfaces and Colloids
Diana CholakovaStoyan K Smoukov

Abstract

In our recent study we showed that single-component emulsion drops, stabilized by proper surfactants, can spontaneously break symmetry and transform into various polygonal shapes during cooling [ Denkov Nature 2015 , 528 , 392 - 395 ]. This process involves the formation of a plastic rotator phase of self-assembled oil molecules beneath the drop surface. The plastic phase spontaneously forms a frame of plastic rods at the oil drop perimeter which supports the polygonal shapes. However, most of the common substances used in industry appear as mixtures of molecules rather than pure substances. Here we present a systematic study of the ability of multicomponent emulsion drops to deform upon cooling. The observed trends can be summarized as follows: (1) The general drop-shape evolution for multicomponent drops during cooling is the same as with single-component drops; however, some additional shapes are observed. (2) Preservation of the particle shape upon freezing is possible for alkane mixtures with chain length difference Δn ≤ 4; for greater Δn, phase separation within the droplet is observed. (3) Multicomponent particles prepared from alkanes with Δn ≤ 4 plastify upon cooling due to the formation of a bulk rotator phase within ...Continue Reading

References

Jan 23, 1999·Science·E B Sirota, A B Herhold
Oct 4, 2014·The Journal of Physical Chemistry. B·Xia GaoDujin Wang
Jul 9, 2016·Advances in Colloid and Interface Science·Diana CholakovaStoyan K Smoukov
Jul 19, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Nikolai DenkovStoyan K Smoukov
Mar 11, 2017·Physical Review Letters·Pierre A HaasNikolai Denkov
Apr 28, 2017·Nature Communications·Slavka TcholakovaStoyan K Smoukov

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Citations

Feb 16, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Diana CholakovaNikolai Denkov
Jul 27, 2021·Journal of Colloid and Interface Science·Mathew Quinn GisoTimothy James Atherton
Jul 17, 2021·Journal of Colloid and Interface Science·Diana CholakovaNikolai Denkov
Mar 30, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Diana CholakovaStoyan K Smoukov
Oct 11, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Zhulieta ValkovaStoyan K Smoukov
May 10, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Yuhei TokiwaHiroki Matsubara
Nov 10, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Mathew Q GisoTimothy J Atherton

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