Dynamic wrinkling of freely floating smectic films

Kirsten Harth*, Torsten Trittel, Kathrin May, Ralf Stannarius

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

We demonstrate spontaneous wrinkling as a transient dynamical pattern in thin freely floating smectic liquid-crystalline films. The peculiarity of such films is that, while behaving liquid-like with respect to flow in the film plane, they cannot quickly expand their thickness because that requires stacking of additional smectic layers. At short time scales, they therefore behave like quasi-incompressible membranes, very different from soap films. Smectic films can develop a transient undulation instability or form bulges in response to lateral compression. Optical experiments with freely floating bubbles on parabolic flights and in ground lab experiments are reported. The characteristic wavelengths of the wrinkles are in the submillimeter range. We demonstrate the dynamic nature of the pattern formation mechanism and develop a basic model that explains the physical mechanism for the wavelength selection and wrinkle orientation.

Original languageEnglish
Pages (from-to)6769-6778
Number of pages10
JournalSoft matter
Volume15
Issue number34
DOIs
Publication statusPublished - 5 Jul 2019

Fingerprint

wrinkling
floating
parabolic flight
Wavelength
soaps
Soaps (detergents)
Liquids
liquids
wavelengths
bubbles
Experiments
Crystalline materials
membranes
Membranes

Cite this

Harth, K., Trittel, T., May, K., & Stannarius, R. (2019). Dynamic wrinkling of freely floating smectic films. Soft matter, 15(34), 6769-6778. https://doi.org/10.1039/c9sm01181a
Harth, Kirsten ; Trittel, Torsten ; May, Kathrin ; Stannarius, Ralf. / Dynamic wrinkling of freely floating smectic films. In: Soft matter. 2019 ; Vol. 15, No. 34. pp. 6769-6778.
@article{db27a06783044524b38f082242e930da,
title = "Dynamic wrinkling of freely floating smectic films",
abstract = "We demonstrate spontaneous wrinkling as a transient dynamical pattern in thin freely floating smectic liquid-crystalline films. The peculiarity of such films is that, while behaving liquid-like with respect to flow in the film plane, they cannot quickly expand their thickness because that requires stacking of additional smectic layers. At short time scales, they therefore behave like quasi-incompressible membranes, very different from soap films. Smectic films can develop a transient undulation instability or form bulges in response to lateral compression. Optical experiments with freely floating bubbles on parabolic flights and in ground lab experiments are reported. The characteristic wavelengths of the wrinkles are in the submillimeter range. We demonstrate the dynamic nature of the pattern formation mechanism and develop a basic model that explains the physical mechanism for the wavelength selection and wrinkle orientation.",
author = "Kirsten Harth and Torsten Trittel and Kathrin May and Ralf Stannarius",
year = "2019",
month = "7",
day = "5",
doi = "10.1039/c9sm01181a",
language = "English",
volume = "15",
pages = "6769--6778",
journal = "Soft matter",
issn = "1744-683X",
publisher = "Royal Society of Chemistry",
number = "34",

}

Harth, K, Trittel, T, May, K & Stannarius, R 2019, 'Dynamic wrinkling of freely floating smectic films', Soft matter, vol. 15, no. 34, pp. 6769-6778. https://doi.org/10.1039/c9sm01181a

Dynamic wrinkling of freely floating smectic films. / Harth, Kirsten; Trittel, Torsten; May, Kathrin; Stannarius, Ralf.

In: Soft matter, Vol. 15, No. 34, 05.07.2019, p. 6769-6778.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Dynamic wrinkling of freely floating smectic films

AU - Harth, Kirsten

AU - Trittel, Torsten

AU - May, Kathrin

AU - Stannarius, Ralf

PY - 2019/7/5

Y1 - 2019/7/5

N2 - We demonstrate spontaneous wrinkling as a transient dynamical pattern in thin freely floating smectic liquid-crystalline films. The peculiarity of such films is that, while behaving liquid-like with respect to flow in the film plane, they cannot quickly expand their thickness because that requires stacking of additional smectic layers. At short time scales, they therefore behave like quasi-incompressible membranes, very different from soap films. Smectic films can develop a transient undulation instability or form bulges in response to lateral compression. Optical experiments with freely floating bubbles on parabolic flights and in ground lab experiments are reported. The characteristic wavelengths of the wrinkles are in the submillimeter range. We demonstrate the dynamic nature of the pattern formation mechanism and develop a basic model that explains the physical mechanism for the wavelength selection and wrinkle orientation.

AB - We demonstrate spontaneous wrinkling as a transient dynamical pattern in thin freely floating smectic liquid-crystalline films. The peculiarity of such films is that, while behaving liquid-like with respect to flow in the film plane, they cannot quickly expand their thickness because that requires stacking of additional smectic layers. At short time scales, they therefore behave like quasi-incompressible membranes, very different from soap films. Smectic films can develop a transient undulation instability or form bulges in response to lateral compression. Optical experiments with freely floating bubbles on parabolic flights and in ground lab experiments are reported. The characteristic wavelengths of the wrinkles are in the submillimeter range. We demonstrate the dynamic nature of the pattern formation mechanism and develop a basic model that explains the physical mechanism for the wavelength selection and wrinkle orientation.

UR - http://www.scopus.com/inward/record.url?scp=85070080428&partnerID=8YFLogxK

U2 - 10.1039/c9sm01181a

DO - 10.1039/c9sm01181a

M3 - Article

C2 - 31393512

AN - SCOPUS:85070080428

VL - 15

SP - 6769

EP - 6778

JO - Soft matter

JF - Soft matter

SN - 1744-683X

IS - 34

ER -

Harth K, Trittel T, May K, Stannarius R. Dynamic wrinkling of freely floating smectic films. Soft matter. 2019 Jul 5;15(34):6769-6778. https://doi.org/10.1039/c9sm01181a