Wisconsin Alumni Research Foundation

Semiconductors & Integrated Circuits
Semiconductors Integrated Circuits
Methods For Removing Polymer Coatings From Single-Walled Carbon Nanotubes
WARF: P150061US01

Inventors: Padma Gopalan, Michael Arnold, Yongho Joo, Gerald Brady, Matthew Shea

The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing a method to sort and purify semiconducting SWCNTs.
Single-walled carbon nanotubes (SWCNTs) have exceptional properties that make them useful in a variety of semiconducting applications such as field effect transistors (FETs), solar cells and gas sensors.

During fabrication, it is critical to separate the desired semiconducting SWCNTs (s-SWCNTs) from the undesired metallic SWCNTs (m-SWCNTs) found in the mixture. The most effective method is to selectively coat s-SWCNTs with a polymer wrap. However, removing the sticky coating post sorting remains a challenge.
The Invention
UW–Madison researchers have developed a new, mild method to remove the polymer coatings used to selectively wrap and sort s-SWCNTs from m-SWCNTs. The method is based on a process of detaching the coating by binding transition metal complexes to bi-pyridine repeat units in the polymer backbone.
  • Field effect transistors, displays, flexible electronics, sensors, biosensors and heterojunction devices (e.g., solar cells)
Key Benefits
  • Carried out under mild conditions
  • Supports high electronic-type purity
  • No undesired side effects
  • Does not adversely impact electric/optoelectric properties
Stage of Development
This method has been successfully tested with a variety of SWCNTs.
Additional Information
For More Information About the Inventors
For current licensing status, please contact Jeanine Burmania at [javascript protected email address] or 608-960-9846