Navigation Links
Polymer synthesis could aid future electronics
Date:7/19/2010

OAK RIDGE, Tenn., July 19, 2010 -- Tomorrow's television and computer screens could be brighter, clearer and more energy-efficient as a result of a process developed by a team of researchers from Canada and the Department of Energy's Oak Ridge National Laboratory.

The synthesis of a conjugated organic polymer--widely used as a conductive material in devices like light-emitting diodes, televisions and solar cells--could mean more efficient, cheaper electronics.

In a paper published in the Proceedings of the National Academy of Sciences, the group of scientists from ORNL and two Canadian universities outlined their success in growing highly structured short chains of polymer poly(3,4-ethylenedioxythiophene), or PEDOT. Analysis and understanding of the polymerization process and results were provided with the help of ORNL supercomputers.

The theoretical expertise provided by ORNL scientists Bobby Sumpter and Vincent Meunier in synthesizing the PEDOT polymer could potentially have an impact on everyday electronic products. PEDOT is valued in electronic applications for the transparency, ductility and stability of its conducting, or doped, state. Because of its role as conductive material in organic light-emitting diodes, PEDOT is found in many electronic devices such as televisions and computer monitors.

The polymer is also used in many solar panel cells as a hole-filling material. "It's one of the most successfully used semiconducting polymers on the planet," Sumpter said.

Improving and controlling the molecular order of a nanostructured PEDOT material is critical to the polymer's performance in electronic applications. The highly ordered polymer arrays such as those constructed by the researchers could lead to increased efficiencies in a multitude of electronic devices.

To create ordered arrays of the PEDOT polymer, the team placed a precursor molecule onto a copper crystalline surface, which helped to guide and initiate the polymerization reaction. Team member Meunier of ORNL compared the process to placing eggs in an egg carton, where the free energy minima, or "indentations," in the copper surface allow the molecules to neatly stack next to each other to form a compact and organized polymer structure.

"The chemistry and resulting stereochemical structure on the surface are very unusual," said Sumpter. "Most attempts to synthesize polymers usually result in imperfect polymer arrays with a very different prominent structure."

Sumpter and Meunier from ORNL's Center for Nanophase Materials Sciences with appointments in the Computer Science and Mathematics Division collaborated in the project by analyzing the results through a "virtual microscope." Based on density functional theory calculations and simulations performed on ORNL supercomputers, the "virtual microscopy" revealed the highly organized structure of the polymer arrays. By examining the polymer formation with the conventional means of scanning tunneling microscopy combined with the virtual microscopy, the team was able to clearly illustrate the construction and bonding of PEDOT arrays.

"This experiment defines what nanoscience is about--a mixture of experimental techniques combined with theoretical knowledge," Meunier said. "It was an excellent opportunity to interface directly with experimentalists and establish new international collaborations."

Although the team focused its research on the PEDOT polymer, the researchers believe the same approach could potentially be used to construct other well-defined polymers.


'/>"/>

Contact: Morgan McCorkle
mccorkleml@ornl.gov
865-574-4160
DOE/Oak Ridge National Laboratory
Source:Eurekalert

Related biology technology :

1. Mass production of polymer solar cells is within reach
2. 'Biopolymers Symposium 2010' Agenda Announced
3. Peptimmune Announces Second Grant of a United States Patent for PI-2301 Peptide Copolymer for Multiple Sclerosis
4. Dates Announced for IntertechPira's 5th Annual Biopolymers Symposium
5. Polymer with honeycomb structure
6. Looking deeply into polymer solar cells
7. Biopolymers Symposium 2009 Teams with Carbonfund.org to Create a Zero-Carbon Event
8. SyntheMed Receives US Patent on Novel Polymer Technology
9. Symphony Medical Changes Name to CardioPolymers, Inc.
10. Oxford Performance Materials Introduces OXPEKK PermettaTM High Performance Polymer Films
11. Frost & Sullivan Recognizes Kraton Polymers for Developing a New Generation of Polymer Grades Suitable for High-Speed Processing in Nonwoven Manufacture
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/27/2016)... ... ... The Pittcon Organizing Committee is pleased to announce that Charles “Chuck” Gardner was named ... 1987. Since then, he has served in a number of key leadership positions including ... program and exposition committees. In his professional career, Dr. Gardner is the director of ...
(Date:4/27/2016)... ... April 27, 2016 , ... The ... announce the appointment of John Tilton as Chief Commercial Officer.  Mr. Tilton joined ... of the founding commercial leaders responsible for the commercialization of multiple orphan drug ...
(Date:4/27/2016)... ... ... Global Stem Cells Group CEO Benito Novas announced that Duncan Ross, ... Kimera Labs in Miami. , In 2004, Ross received his Ph.D. in Immunology from ... and the suppression of graft vs. host disease (GVHD) under UM Professor Robert Levy ...
(Date:4/26/2016)... ... April 27, 2016 , ... ... Rothgerber Christie LLP as an associate in the firm’s Intellectual Property practice group. ... mechanical and electromechanical patent applications. He has an electrical engineering and computer engineering ...
Breaking Biology Technology:
(Date:3/29/2016)... LegacyXChange, Inc. (OTC: LEGX ... Protect are pleased to announce our successful effort to ... of writing instruments, ensuring athletes signatures against counterfeiting and ... athletes on LegacyXChange will be assured of ongoing proof ... Bill Bollander , CEO states, "By inserting ...
(Date:3/18/2016)... 18, 2016 --> ... ICT, Manned & Unmanned Vehicles, Physical infrastructure and Perimeter Surveillance ... in the border security market and the continuing migration crisis ... Europe has led visiongain to publish this ... --> defence & security companies in the ...
(Date:3/14/2016)... Allemagne, March 14, 2016 ... - --> - Renvoi : image disponible ... --> --> DERMALOG, ... fournit de nouveaux lecteurs d,empreintes digitales pour l,enregistrement ... DERMALOG sera utilisé pour produire des cartes d,identité ...
Breaking Biology News(10 mins):