Controlling statics and dynamics of colloids by photo-patterned liquid crystals
(Conference Presentation)

Oleg D. Lavrentovich; Chenhui Peng; Yubing Guo; Sergij V. Shiyanovskii; Qi-Huo Wei

doi:10.1117/12.2236421

2 November 2016 Controlling statics and dynamics of colloids by photo-patterned liquid crystals (Conference Presentation)

Oleg D. Lavrentovich, Chenhui Peng, Yubing Guo, Sergij V. Shiyanovskii, Qi-Huo Wei

Author Affiliations +

Proceedings Volume 9940, Liquid Crystals XX; 99400Q (2016) https://doi.org/10.1117/12.2236421
Event: SPIE Organic Photonics + Electronics, 2016, San Diego, California, United States

Abstract

Transport of fluids and particles at the microscale is an important theme both in fundamental and applied science. We demonstrate how an advanced approach to photo-induced alignment of liquid crystals can be used to generate nonlinear electrokinetics. The photoalignment technique is based on irradiation of a photosensitive substrate with light through nanoaperture arrays in metal films. The resulting pattern of surface alignment induces predesigned 2D and 3D distortions of local molecular orientation. In presence of a static electric field, these distortions generate spatial charge and drive electrokinetic flows of the new type, in which the velocities depend on the square of the applied electric field. The patterned liquid crystal electrolyte converts the electric energy into the flows and transport of embedded particles of any type (fluid, solid, gaseous) along a predesigned trajectory, posing no limitation on the electric nature (charge, polarizability) of these particles and interfaces. The patterned liquid crystal electrolyte induces persistent vortices of controllable rotation speed and direction that are quintessential for micro- and nanoscale mixing applications.

Conference Presentation

Citation Download Citation

Oleg D. Lavrentovich, Chenhui Peng, Yubing Guo, Sergij V. Shiyanovskii, and Qi-Huo Wei "Controlling statics and dynamics of colloids by photo-patterned liquid crystals (Conference Presentation)", Proc. SPIE 9940, Liquid Crystals XX, 99400Q (2 November 2016); https://doi.org/10.1117/12.2236421

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available