Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Photonic Gel Films Hold Promise

Photonic gel crystals demonstrate the "tunability" of materials made from alternating layers of hard and soft polymers. The soft polymers are easily swollen with liquid or vapor, causing the materials to reflect different colors of light based on the way their molecules are chemically "tuned".

Credit: Courtesy of Edwin L. Thomas, MIT
Photonic gel crystals demonstrate the "tunability" of materials made from alternating layers of hard and soft polymers. The soft polymers are easily swollen with liquid or vapor, causing the materials to reflect different colors of light based on the way their molecules are chemically "tuned".

Credit: Courtesy of Edwin L. Thomas, MIT

Abstract:
By alternating layers of two different polymers - one rigid and glassy, the other soft and easily swollen with liquid or vapor - researchers funded by the National Science Foundation (NSF) report they've created photonic gel crystals that can be tuned to reflect light of many different colors across the visible and near-infrared spectrum.

Photonic Gel Films Hold Promise

Cambridge, MA | Posted on October 21st, 2007

The research results, reported in the Oct. 21 online issue of Nature Materials by Principal Investigator Edwin Thomas and his colleagues at the Massachusetts Institute of Technology's department of materials science and engineering, demonstrate the degree to which these photonic materials are tunable through changes in the soft layer's thickness and index of refraction. The responsiveness of the photonic crystals makes them likely candidates for active components of display, sensory or telecommunication devices.

"This is an ingenious and easy-to-implement method for making photonic materials whose optical properties can be readily tuned over a wide range [of the spectrum]," said Andrew Lovinger, director of the polymers program at NSF, which funded this research.

In one example, the researchers show very large, reversible optical changes by varying the salt content of a water solution in which these films are dipped. Multicolor patterns can be made by sequential coating of films, with the color of each region depending on the degree to which their molecules are chemically interconnected.

"We expect these photonic gels will lead to many novel applications, including colorimetric sensors, active components of simple display devices, and electrically controlled tunable optically pumped lasers, photonic switches and multiband filters," Thomas said.

NSF funded the research in 2003 through a three-year grant aimed at creating new nanomaterials that are tunable through magnetic, chemical or other techniques. Following the discovery of intriguing new effects by Thomas and his colleagues involving the interaction of light and sound in these nanomaterials, his grant was extended for two additional years through a "special creativity award."

-NSF-

####

About National Science Foundation
The National Science Foundation (NSF) is an independent federal agency that supports fundamental research and education across all fields of science and engineering, with an annual budget of $5.92 billion. NSF funds reach all 50 states through grants to over 1,700 universities and institutions. Each year, NSF receives about 42,000 competitive requests for funding, and makes over 10,000 new funding awards. The NSF also awards over $400 million in professional and service contracts yearly.

For more information, please click here

Contacts:
Media Contacts
Diane E. Banegas
NSF
(703) 292-8070


Anne Trafton
Massachusetts Institute of Technology
(617) 253-6936


Program Contacts
Andrew Lovinger
National Science Foundation
(703) 292-4933


Principal Investigators
Edwin Thomas
Massachusetts Institute of Technology
617-253-6901

Copyright © National Science Foundation

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

NSF Home Page

NSF News

For the News Media

Science and Engineering Statistics

Awards Searches

Related News Press

Display technology/LEDs/SS Lighting/OLEDs

Leti Will Demo World’s-first WVGA 10-µm Pitch GaN Microdisplays for Augmented Reality Video at Display Week in Los Angles: Invited Paper also Will Present Leti’s Success with New Augmented Reality Technology That Reduces Pixel Pitch to Less than 5 Microns May 22nd, 2017

CCNY physicists demonstrate photonic hypercrystals for control of light-matter interaction May 5th, 2017

New ultrafast flexible and transparent memory devices could herald new era of electronics April 1st, 2017

UC researchers use gold coating to control luminescence of nanowires: University of Cincinnati physicists manipulate nanowire semiconductors in pursuit of making electronics smaller, faster and cheaper March 17th, 2017

Govt.-Legislation/Regulation/Funding/Policy

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Sensors

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

'Hot' electrons don't mind the gap: Rice University scientists find nanogaps in plasmonic gold wires enhance voltage when excited May 8th, 2017

Better living through pressure: Functional nanomaterials made easy April 19th, 2017

Discoveries

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Announcements

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Grants/Sponsored Research/Awards/Scholarships/Gifts/Contests/Honors/Records

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Zap! Graphene is bad news for bacteria: Rice, Ben-Gurion universities show laser-induced graphene kills bacteria, resists biofouling May 22nd, 2017

Gas gives laser-induced graphene super properties: Rice University study shows inexpensive material can be superhydrophilic or superhydrophobic May 15th, 2017

Photonics/Optics/Lasers

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Researchers find new way to control light with electric fields May 25th, 2017

Zap! Graphene is bad news for bacteria: Rice, Ben-Gurion universities show laser-induced graphene kills bacteria, resists biofouling May 22nd, 2017

Plasmon-powered upconversion nanocrystals for enhanced bioimaging and polarized emission: Plasmonic gold nanorods brighten lanthanide-doped upconversion superdots for improved multiphoton bioimaging contrast and enable polarization-selective nonlinear emissions for novel nanoscal May 19th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project