Washing effects on the anchoring energy and surface order parameter on rubbed polymer surfaces containing the trifluoromethyl moiety

Jeong Mim Han; Jeoung Yeon Hwang; Dae Shik Seo; Sang Keuk Lee; Joon Ung Lee

doi:10.1080/02678290410001732260

Washing effects on the anchoring energy and surface order parameter on rubbed polymer surfaces containing the trifluoromethyl moiety

Jeong Mim Han, Jeoung Yeon Hwang, Dae Shik Seo, Sang Keuk Lee, Joon Ung Lee

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The washing effects on liquid crystal (LC) alignment capability in a NLC, 4-n-pentyl-4′-cyanobiphenyl (5CB), on a rubbed polyimide (PI) surface containing the trifluoromethyl moiety were studied. The extrapolation length d_e of 5CB on the rubbed PI surface decreases with the rubbing strength RS. Also, the large extrapolation length d_e of 5CB for washing with IPA was measured at RS = 114 mm. The polar anchoring energy of 5CB on the rubbed PI surface was decreased by the washing process; it increased with the rubbing strength RS on the PI surface. The surface order parameter S _S of 5CB for all the washing processes is smaller than for the non-washing process. Consequently, the polar anchoring energy and surface order parameter S_S in 5CB are largely attributed to washing effects.

Original language	English
Pages (from-to)	1259-1264
Number of pages	6
Journal	Liquid Crystals
Volume	31
Issue number	9
DOIs	https://doi.org/10.1080/02678290410001732260
Publication status	Published - 2004 Sept

Bibliographical note

Funding Information:
This work was supported by the National Research Laboratory program (M1-0203-00-008).

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1080/02678290410001732260

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title = "Washing effects on the anchoring energy and surface order parameter on rubbed polymer surfaces containing the trifluoromethyl moiety",

abstract = "The washing effects on liquid crystal (LC) alignment capability in a NLC, 4-n-pentyl-4′-cyanobiphenyl (5CB), on a rubbed polyimide (PI) surface containing the trifluoromethyl moiety were studied. The extrapolation length de of 5CB on the rubbed PI surface decreases with the rubbing strength RS. Also, the large extrapolation length de of 5CB for washing with IPA was measured at RS = 114 mm. The polar anchoring energy of 5CB on the rubbed PI surface was decreased by the washing process; it increased with the rubbing strength RS on the PI surface. The surface order parameter S S of 5CB for all the washing processes is smaller than for the non-washing process. Consequently, the polar anchoring energy and surface order parameter SS in 5CB are largely attributed to washing effects.",

author = "Han, {Jeong Mim} and Hwang, {Jeoung Yeon} and Seo, {Dae Shik} and Lee, {Sang Keuk} and Lee, {Joon Ung}",

note = "Funding Information: This work was supported by the National Research Laboratory program (M1-0203-00-008).",

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AU - Han, Jeong Mim

AU - Hwang, Jeoung Yeon

AU - Seo, Dae Shik

AU - Lee, Sang Keuk

AU - Lee, Joon Ung

N1 - Funding Information: This work was supported by the National Research Laboratory program (M1-0203-00-008).

PY - 2004/9

Y1 - 2004/9

N2 - The washing effects on liquid crystal (LC) alignment capability in a NLC, 4-n-pentyl-4′-cyanobiphenyl (5CB), on a rubbed polyimide (PI) surface containing the trifluoromethyl moiety were studied. The extrapolation length de of 5CB on the rubbed PI surface decreases with the rubbing strength RS. Also, the large extrapolation length de of 5CB for washing with IPA was measured at RS = 114 mm. The polar anchoring energy of 5CB on the rubbed PI surface was decreased by the washing process; it increased with the rubbing strength RS on the PI surface. The surface order parameter S S of 5CB for all the washing processes is smaller than for the non-washing process. Consequently, the polar anchoring energy and surface order parameter SS in 5CB are largely attributed to washing effects.

AB - The washing effects on liquid crystal (LC) alignment capability in a NLC, 4-n-pentyl-4′-cyanobiphenyl (5CB), on a rubbed polyimide (PI) surface containing the trifluoromethyl moiety were studied. The extrapolation length de of 5CB on the rubbed PI surface decreases with the rubbing strength RS. Also, the large extrapolation length de of 5CB for washing with IPA was measured at RS = 114 mm. The polar anchoring energy of 5CB on the rubbed PI surface was decreased by the washing process; it increased with the rubbing strength RS on the PI surface. The surface order parameter S S of 5CB for all the washing processes is smaller than for the non-washing process. Consequently, the polar anchoring energy and surface order parameter SS in 5CB are largely attributed to washing effects.

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Washing effects on the anchoring energy and surface order parameter on rubbed polymer surfaces containing the trifluoromethyl moiety

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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