Tailoring the Orientation and Periodicity of Wrinkles Using Ion-Beam Bombardment.
The present study demonstrates that surface reformation in polydimethylsiloxane can be controlled using ion-beam (IB) irradiation. This can be done by simply varying the IB incidence angle and requires no change in the energy source. By controlling the incidence angle of IB irradiation, we were able to continuously control the pattern of the wrinkle structure, that is, a randomly formed pattern or an anisotropic one. Moreover, the directional characteristics of the wrinkle pattern control the alignment of liquid crystal molecules. This control is a function of the incidence angle of the IB. These simple methods can provide considerable flexibility in the fabrication of wrinkle structures.
Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
Hae-Chang
HC
Jeong
School of Electrical, Electronic and Control Engineering, Changwon National University , 20 Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do 51140, Korea.
Hong-Gyu
HG
Park
Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
Yoon Ho
YH
Jung
Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
Ju Hwan
JH
Lee
ZeSHTech Company, Ltd., Business Incubator, Gwangju Institute of Science and Technology , 123, Cheomdangwagi-ro, Buk-gu, Gwangju 500-712, South Korea.
Byeong-Yun
BY
Oh
Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
Dae-Shik
DS
Seo