Featured Research

from universities, journals, and other organizations

Liquid crystal's chaotic inner dynamics

Date:
January 24, 2013
Source:
Springer Science+Business Media
Summary:
Scientists have unearthed a new dynamic process induced by strong electric fields in thin liquid crystal cells. Liquid crystal displays are ubiquitous. Now, physicists have demonstrated that the application of a very strong alternating electric field to thin liquid crystal cells leads to a new distinct dynamic effect in the response of the cells.

Scientists have unearthed a new dynamic process induced by strong electric fields in thin liquid crystal cells.
Credit: Image courtesy of Springer Science+Business Media

Scientists have unearthed a new dynamic process induced by strong electric fields in thin liquid crystal cells.

Liquid crystal displays are ubiquitous. Now, Polish physicists have demonstrated that the application of a very strong alternating electric field to thin liquid crystal cells leads to a new distinct dynamic effect in the response of the cells. The theory of spatio-temporal chaos explains this effect. It was elucidated by Wojciech Jeżewski and colleagues from the Institute of Molecular Physics, Polish Academy of Sciences, in Poznań, Poland, and is about to be published in EPJ E. This effect has implications for the operation of liquid-crystal devices because their operation is based on the electro-optic switching phenomenon, subject to the newly discovered effect.

The authors first applied an alternating electric field to semi-transparent, conducting plates of cells containing a liquid crystal substance. Such systems are characterised by a spontaneous electric polarisation that can be reversed by the application of an external electric field.

The Jeżewski team then registered the resulting molecular reorientations by recording changes in the intensity of light transmitted by the liquid crystal sample, or spectra. In particular, the authors experimentally identified a distinct high-frequency band in the response, reflecting the activation of a specific dynamic process inside the sample.

Theoretical studies of the complex molecular reorientation dynamics confirmed experimental observations. The team explained the response of the sample by numerically solving the equation describing the motion of molecules subjected to very strong alternating fields. Unlike previous approaches, these simulations did not make any assumption about the sample dynamics.

The effect they showed was associated with a chaotic molecular reorientation induced by a strong field of sufficiently high frequency. Furthermore, a unique experimental setup led to signals, due to strong excitations of liquid crystals at frequencies less than the frequency of the external electric field, being registered.


Story Source:

The above story is based on materials provided by Springer Science+Business Media. Note: Materials may be edited for content and length.


Journal Reference:

  1. W. Jeżewski, I. Śliwa, W. Kuczyński. Strongly nonlinear dynamics of ferroelectric liquid crystals. The European Physical Journal E, 2013; 36 (1) DOI: 10.1140/epje/i2013-13002-7

Cite This Page:

Springer Science+Business Media. "Liquid crystal's chaotic inner dynamics." ScienceDaily. ScienceDaily, 24 January 2013. <www.sciencedaily.com/releases/2013/01/130124092147.htm>.
Springer Science+Business Media. (2013, January 24). Liquid crystal's chaotic inner dynamics. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2013/01/130124092147.htm
Springer Science+Business Media. "Liquid crystal's chaotic inner dynamics." ScienceDaily. www.sciencedaily.com/releases/2013/01/130124092147.htm (accessed October 23, 2014).

Share This



More Matter & Energy News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

3D Printed Instruments Make Sweet Music in Sweden

3D Printed Instruments Make Sweet Music in Sweden

Reuters - Innovations Video Online (Oct. 23, 2014) — Students from Lund University's Malmo Academy of Music are believed to be the world's first band to all use 3D printed instruments. The guitar, bass guitar, keyboard and drums were built by Olaf Diegel, professor of product development, who says 3D printing allows musicians to design an instrument to their exact specifications. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Chameleon Camouflage to Give Tanks Cloaking Capabilities

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Reuters - Innovations Video Online (Oct. 22, 2014) — Inspired by the way a chameleon changes its colour to disguise itself; scientists in Poland want to replace traditional camouflage paint with thousands of electrochromic plates that will continuously change colour to blend with its surroundings. The first PL-01 concept tank prototype will be tested within a few years, with scientists predicting that a similar technology could even be woven into the fabric of a soldiers' clothing making them virtually invisible to the naked eye. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Jet Sales Lift Boeing Profit 18 Pct.

Jet Sales Lift Boeing Profit 18 Pct.

Reuters - Business Video Online (Oct. 22, 2014) — Strong jet demand has pushed Boeing to raise its profit forecast for the third time, but analysts were disappointed by its small cash flow. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Internet of Things Aims to Smarten Your Life

Internet of Things Aims to Smarten Your Life

AP (Oct. 22, 2014) — As more and more Bluetooth-enabled devices are reaching consumers, developers are busy connecting them together as part of the Internet of Things. (Oct. 22) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins