Featured Research

from universities, journals, and other organizations

New chemistry: Drawing and writing in liquid with light

Date:
November 4, 2013
Source:
Helsingin yliopisto (University of Helsinki)
Summary:
Researchers have manufactured photochemically active polymers which can be dissolved in water or certain alcohols.

Drawing in liquid with light.
Credit: University of Helsinki

University of Helsinki researchers have manufactured photochemically active polymers which can be dissolved in water or certain alcohols. The new soluble, photosensitive polymer was created by doctoral student Szymon Wiktorowicz.

In the study, a 365-nm laser was aimed at a solution into which the polymer was partially dissolved. When exposed to light, the polymer switched to its cis conformation, dissolving completely and leaving a clear form which was visible in the cloudy solution.

The polymer chain created byWiktorowicz includes azo compounds which can be switched from a trans conformation to a cis conformation using light. As the two conformations are different in solubility, a ray of light can "draw" in an ethanol-based dispersion of the polymer. The switch from trans to cis happens in the entire polymer chain.

This effect where light causes the polymer to dissolve completely and be made visible can last several hours depending, for example, on the concentration of the solution.

Light-sensitive polymers are nothing new to chemists. Light has been used for drawing on a solid surface, such as a TV screen or an LCD monitor, but drawing in liquid has so far been impossible.

This discovery is particularly significant for the development of new materials for optics and electronics.

The research project was financially fully supported by the Academy of Finland.

Video: http://www.youtube.com/watch?v=g5kLCAE7xcA&feature=youtu.be


Story Source:

The above story is based on materials provided by Helsingin yliopisto (University of Helsinki). Note: Materials may be edited for content and length.


Journal Reference:

  1. Szymon Wiktorowicz, Heikki Tenhu, Vladimir Aseyev. Using Light To Tune Thermo-Responsive Behavior and Host–Guest Interactions in Tegylated Poly(azocalix[4]arene)s. Macromolecules, 2013; 46 (15): 6209 DOI: 10.1021/ma4011457

Cite This Page:

Helsingin yliopisto (University of Helsinki). "New chemistry: Drawing and writing in liquid with light." ScienceDaily. ScienceDaily, 4 November 2013. <www.sciencedaily.com/releases/2013/11/131104092555.htm>.
Helsingin yliopisto (University of Helsinki). (2013, November 4). New chemistry: Drawing and writing in liquid with light. ScienceDaily. Retrieved September 22, 2014 from www.sciencedaily.com/releases/2013/11/131104092555.htm
Helsingin yliopisto (University of Helsinki). "New chemistry: Drawing and writing in liquid with light." ScienceDaily. www.sciencedaily.com/releases/2013/11/131104092555.htm (accessed September 22, 2014).

Share This



More Matter & Energy News

Monday, September 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Thousands March in NYC Over Climate Change

Thousands March in NYC Over Climate Change

AP (Sep. 21, 2014) — Accompanied by drumbeats, wearing costumes and carrying signs, thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (Sept. 21) Video provided by AP
Powered by NewsLook.com
What This MIT Sensor Could Mean For The Future Of Robotics

What This MIT Sensor Could Mean For The Future Of Robotics

Newsy (Sep. 20, 2014) — MIT researchers developed a light-based sensor that gives robots 100 times the sensitivity of a human finger, allowing for "unprecedented dexterity." Video provided by Newsy
Powered by NewsLook.com
MIT BioSuit A New Take On Traditional Spacesuits

MIT BioSuit A New Take On Traditional Spacesuits

Newsy (Sep. 19, 2014) — The MIT BioSuit could be an alternative to big, bulky traditional spacesuits, but the concept needs some work. Video provided by Newsy
Powered by NewsLook.com
New Music With Recycled Instruments at Colombia Fest

New Music With Recycled Instruments at Colombia Fest

AFP (Sep. 19, 2014) — Jars, bottles, caps and even a pizza box, recovered from the trash, were the elements used by four musical groups at the "RSFEST2014 Sonorities Recycling Festival", in Colombian city of Cali. Duration: 00:49 Video provided by AFP
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:
from the past week

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