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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Dae-Shik Seo Chang-Hoon Lee |
| Copyright Year | 1997 |
| Description | Author affiliation: Dept. of Electr. Eng., Soong-Sil Univ., Seoul, South Korea (Dae-Shik Seo) |
| Abstract | The odd-even effect of the alkyl chain length of rubbed polyimide (PI) Langmuir-Blodgett (LB) surfaces on the extrapolation length of 5CB has been successfully evaluated by measuring polar anchoring strength. The extrapolation length of 5CB for rubbed PI-LB surfaces with even numbers is small compared with odd numbers for alkyl chain lengths of greater than 7 carbons. The extrapolation length of 5CB on rubbed PI-LB surfaces with odd numbers increases gradually as the temperature increases but tends to diverge near the clearing temperature (T/sub c/=35.3/spl deg/C). The extrapolation length diverges because of rapidly decreasing surface order near Tc. It is suggested that the polar anchoring strength on rubbed PI-LB surfaces with an even number is strong because of relatively high surface ordering caused by more crystalline surfaces. Finally, it is concluded that the odd-even effects of the polar anchoring strength in nematic liquid crystals (NLCs) are strongly related to the character of the polymer and observed-clearly for long alkyl chain lengths. |
| Starting Page | 603 |
| Ending Page | 605 |
| File Size | 202122 |
| Page Count | 3 |
| File Format | |
| ISBN | 0780326512 |
| DOI | 10.1109/ICPADM.1997.616506 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1997-05-25 |
| Publisher Place | South Korea |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Liquid crystals Polyimides Extrapolation Surface treatment Electric variables measurement Liquid crystal polymers Chemicals Length measurement Temperature Crystallization |
| Content Type | Text |
| Resource Type | Article |
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