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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 8 — Apr. 15, 2010
  • pp: 1151–1153

Titanium dioxide surface modification via ion-beam bombardment for vertical alignment of nematic liquid crystal

Hyun-Jae Na, Jin-Woo Lee, Won-Kyu Lee, Ji-Hun Lim, Hong-Gyu Park, Byoung-Yong Kim, Jeong-Yeon Hwang, Jeong-Min Han, and Dae-Shik Seo  »View Author Affiliations


Optics Letters, Vol. 35, Issue 8, pp. 1151-1153 (2010)
http://dx.doi.org/10.1364/OL.35.001151


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Abstract

We introduce the characteristics of the titanium dioxide ( Ti O 2 ) inorganic film deposited by rf magnetron sputtering for liquid crystal display applications. The Ti O 2 films demonstrated vertical alignment (VA) of the liquid crystals (LCs) obtained by using ion-beam (IB) bombardment. As observed by using x-ray photoelectron spectroscopy, the chemical structure of the Ti O 2 was changed by IB bombardment, altering the Ti–O bonding of the Ti 2 p spectra to lower intensity levels. Breaking Ti–O bonding by IB bombardment created pretilt angles between the Ti O 2 film and LC molecules. The better voltage-transmittance characteristics of the VA LCDs based on Ti O 2 film were measured and compared with the same characteristics of polyimide film.

© 2010 Optical Society of America

OCIS Codes
(160.2100) Materials : Electro-optical materials
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Optical Devices

History
Original Manuscript: January 4, 2010
Revised Manuscript: February 22, 2010
Manuscript Accepted: February 28, 2010
Published: April 9, 2010

Citation
Hyun-Jae Na, Jin-Woo Lee, Won-Kyu Lee, Ji-Hun Lim, Hong-Gyu Park, Byoung-Yong Kim, Jeong-Yeon Hwang, Jeong-Min Han, and Dae-Shik Seo, "Titanium dioxide surface modification via ion-beam bombardment for vertical alignment of nematic liquid crystal," Opt. Lett. 35, 1151-1153 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-8-1151


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