Direct orientation of liquid crystal molecule by AFM nano-rubbing and its application to optical devices

AFM纳米摩擦液晶分子直接取向及其在光学器件中的应用

基本信息

批准号：
16510097
负责人：
UMEDA Norihiro
金额：
$ 2.43万
依托单位：
National University Corporation Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

The orientation control of liquid crystal (LC) molecule on the polyimide film has been necessary to fabricate LC devices. Nano-rubbing by atomic force microscope (AFM) has been proposed as the one of methods to control it precisely. In the method, a thin polyimide film was rubbed by a sharpened AFM probe-tip with relatively strong load force. However, the method has some drawbacks ; the frictional wear of AFM probe-tip and the difficulty of reorientation after rubbing. In this paper, we have proposed the orientation control of LC on the polyimide film and using direct AFM nano-rubbing method with weak load forces. The change of LC alignment was quantitatively observed by a polarization microscope and birefringence-contrast scanning near-field optical microscope. The effect of scanning density was strong for azimuth angle but the effect of the scanning velocity was weak for both retardation and azimuth angle. An optical switching device was developed utilized isotropic-nematic phase change of liquid crystal which was rubbed in the grating pattern with methyl red dying, and the optical device was operated at the frequency of 0.5Hz. As a result, The proposed method had an effective method to fabricate novel liquid crystal optical devices.

在制造LC设备上，必须对聚酰亚胺膜上液晶（LC）分子的方向控制。已经提出，原子力显微镜（AFM）将纳米润滑是精确控制它的方法之一。在该方法中，通过具有相对较强的载荷的锐化的AFM探针尖端擦除了薄的聚酰亚胺膜。但是，该方法有一些缺点。 AFM探针尖端的摩擦磨损和摩擦后的重新定位难度。在本文中，我们提出了在聚酰亚胺膜上的LC方向控制，并使用具有弱负载力的直接AFM纳米润滑方法。通过极化显微镜和双重对比扫描近场光学显微镜定量观察到LC比对的变化。对于方位角，扫描密度的效果很强，但扫描速度的效果对于延迟和方位角较弱。开发了一个光学开关装置，利用了液晶的各向同性近神经相变，该相变为甲基红色垂死，并以0.5Hz的频率操作光学设备。结果，提出的方法具有制造新型液晶光学设备的有效方法。

项目成果

期刊论文数量（17）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Direct alignment of nematic liquid crystal molecule using atomic force microscope nano-rubbing

利用原子力显微镜纳米摩擦直接排列向列液晶分子

DOI：
发表时间：
2005
期刊：
Proceedings of SPIE 6050
影响因子：
0
作者：
Itaru Nishiyama;Norio Yoshida;Mizue Ebisawa;Atsuo Takayanagi;Yukitoshi Otani;Norihiro Umeda
通讯作者：
Norihiro Umeda

膜厚測定装置及び膜厚測定方法

膜厚测定装置及膜厚测定方法