Drop-on-demand electrohydrodynamic printing of nematic liquid crystals
In this paper, electrohydrodynamic (EHD) printing of nematic liquid crystals (LCs) is demonstrated. Miniscule LC droplets, as small as 1 micron, are generated with the EHD printing system and deposited with high precision onto a glass substrate. Herein, we investigate how the voltage waveform and pu...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2024
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| _version_ | 1826313938150621184 |
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| author | Kamal, W Li, M Sykes, T Castrejon-Pita, AA Elston, S Morris, S |
| author_facet | Kamal, W Li, M Sykes, T Castrejon-Pita, AA Elston, S Morris, S |
| author_sort | Kamal, W |
| collection | OXFORD |
| description | In this paper, electrohydrodynamic (EHD) printing of nematic liquid crystals (LCs) is
demonstrated. Miniscule LC droplets, as small as 1 micron, are generated with the EHD
printing system and deposited with high precision onto a glass substrate. Herein, we
investigate how the voltage waveform and pulse frequency applied to the print nozzle
influences the dynamics of the deposition process and the final landed footprint diameter of
the printed spherical-cap-shaped LC droplets at the glass substrate. To complement results
from high-speed shadowgraphy imaging, simulations were employed to model the jetting
process and the formation of the Taylor Cone. Using EHD printing, we show results for two
different printing modes: cone-jetting and micro-dripping. We highlight the benefits and
drawbacks of each mode and conclude with the demonstration of a printed alphanumeric
pattern that showcases the capability of EHD printing to deposit very small volumes of
nematic LC in order to form well-defined spatial patterns. |
| first_indexed | 2024-09-25T04:24:14Z |
| format | Journal article |
| id | oxford-uuid:dcdf308e-e9e1-4dff-9428-8259e0a22a5c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:24:14Z |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:dcdf308e-e9e1-4dff-9428-8259e0a22a5c2024-08-21T13:21:29ZDrop-on-demand electrohydrodynamic printing of nematic liquid crystalsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:dcdf308e-e9e1-4dff-9428-8259e0a22a5cEnglishSymplectic ElementsWiley2024Kamal, WLi, MSykes, TCastrejon-Pita, AAElston, SMorris, SIn this paper, electrohydrodynamic (EHD) printing of nematic liquid crystals (LCs) is demonstrated. Miniscule LC droplets, as small as 1 micron, are generated with the EHD printing system and deposited with high precision onto a glass substrate. Herein, we investigate how the voltage waveform and pulse frequency applied to the print nozzle influences the dynamics of the deposition process and the final landed footprint diameter of the printed spherical-cap-shaped LC droplets at the glass substrate. To complement results from high-speed shadowgraphy imaging, simulations were employed to model the jetting process and the formation of the Taylor Cone. Using EHD printing, we show results for two different printing modes: cone-jetting and micro-dripping. We highlight the benefits and drawbacks of each mode and conclude with the demonstration of a printed alphanumeric pattern that showcases the capability of EHD printing to deposit very small volumes of nematic LC in order to form well-defined spatial patterns. |
| spellingShingle | Kamal, W Li, M Sykes, T Castrejon-Pita, AA Elston, S Morris, S Drop-on-demand electrohydrodynamic printing of nematic liquid crystals |
| title | Drop-on-demand electrohydrodynamic printing of nematic liquid crystals |
| title_full | Drop-on-demand electrohydrodynamic printing of nematic liquid crystals |
| title_fullStr | Drop-on-demand electrohydrodynamic printing of nematic liquid crystals |
| title_full_unstemmed | Drop-on-demand electrohydrodynamic printing of nematic liquid crystals |
| title_short | Drop-on-demand electrohydrodynamic printing of nematic liquid crystals |
| title_sort | drop on demand electrohydrodynamic printing of nematic liquid crystals |
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