Measuring the Anisotropy in Interfacial Tension of Nematic Liquid Crystals
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Solution Preparation
2.3. Microfluidic Droplet Aspiration
2.3.1. Device Assembly and Experimental Set-Up
2.3.2. Experimental Procedure
2.4. Pendant Drops
3. Results
3.1. Microfluidic Droplet Aspiration
3.1.1. Normal Anchoring with Surfactant
3.1.2. Tangential Anchoring with and without Polymer Stabilizer
3.2. Pendant Drop Measurements
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
5CB | 4-cyano-4′-pentylbiphenyl |
SDS | sodium dodecyl sulfate |
PVA | poly(vinyl alcohol) |
DMOAP | dimethyloctadecyl[3(trimethoxy-silyl)propyl]ammonium chloride |
LC | liquid crystal |
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Concentration SDS (aq), mM | Interfacial Tension, mN·m |
---|---|
6.0 | 10.4 ± 0.8 |
5.0 | 11.4 ± 0.8 |
2.0 | 13.9 ± 0.9 |
1.0 | 17.0 ± 0.3 |
0.10 | 28.3 ± 0.7 |
0.010 | 30.5 ± 0.6 |
Concentration PVA (aq), % w/w | Concentration Molar Equivalent | Interfacial Tension, mN·m |
---|---|---|
1.0 | 0.44–0.78 mM | 30.3 ± 6.0 |
2.50 | 1.12–1.97 mM | 30.2 ± 2.5 |
5.0 | 2.29–4.05 mM | 29.7 ± 1.5 |
7.50 | 3.53–6.24 mM | 28.6 ± 1.1 |
10.0 | 4.83–8.55 mM | 28.4 ± 1.0 |
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Honaker, L.W.; Sharma, A.; Schanen, A.; Lagerwall, J.P.F. Measuring the Anisotropy in Interfacial Tension of Nematic Liquid Crystals. Crystals 2021, 11, 687. https://doi.org/10.3390/cryst11060687
Honaker LW, Sharma A, Schanen A, Lagerwall JPF. Measuring the Anisotropy in Interfacial Tension of Nematic Liquid Crystals. Crystals. 2021; 11(6):687. https://doi.org/10.3390/cryst11060687
Chicago/Turabian StyleHonaker, Lawrence W., Anjali Sharma, Andy Schanen, and Jan P. F. Lagerwall. 2021. "Measuring the Anisotropy in Interfacial Tension of Nematic Liquid Crystals" Crystals 11, no. 6: 687. https://doi.org/10.3390/cryst11060687