Z. Valy Vardeny, University of Utah (image) University of Utah Caption University of Utah physicist Z. Valy Vardeny works in a glove box where light-emitting polymers are studied under clean conditions. Vardeny and colleagues have inserted platinum atoms into an organic semiconductor, creating polymers that can be "tuned" to emit light of different colors -- a step toward a new kind of organic light-emitting diode, or OLED, that can emit truly white light and be used in future light bulbs. Credit Lee J. Siegel, University of Utah. Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.