Selective liquid crystal molecule orientation on ion beam irradiated tantalum oxide ultrathin films

Ji Hun Lim, Byeong Yun Oh, Won Kyu Lee, Kang Min Lee, Hyun Jae Na, Byoung Yong Kim, Dae Shik Seo, Jeong Min Han, Jeong Yeon Hwang

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Abstract

We recently achieved the homogeneous alignment of liquid crystal (LC) on amorphous Ta2O5 layers. This study demonstrates that LC layers could be aligned either homogeneously or vertically by increasing the growth temperature of rf magnetron sputtering device and the irradiation time of the DuoPIGatron type Ar ion beam device causing uniform and dense plasma. We attained two LC orientations by observing Ta 4f and O 1s peak shifts with x-ray photoelectron spectroscopy. Moreover, the decreased thickness of layers with high- k dielectric constants helped to decrease driving LC voltages and in turn to achieve low power consumption.

Original languageEnglish
Article number123503
JournalApplied Physics Letters
Volume95
Issue number12
DOIs
Publication statusPublished - 2009 Oct 12

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Lim, J. H., Oh, B. Y., Lee, W. K., Lee, K. M., Na, H. J., Kim, B. Y., Seo, D. S., Han, J. M., & Hwang, J. Y. (2009). Selective liquid crystal molecule orientation on ion beam irradiated tantalum oxide ultrathin films. Applied Physics Letters, 95(12), [123503]. https://doi.org/10.1063/1.3232239