NTU SPMS Asst Prof Soo Han Sen (IMAGE) Nanyang Technological University Caption NTU SPMS Asst Prof Soo Han Sen with the plastic-photocatalyst mixture, which when exposed to sunlight converts the plastic to formic acid, a useful chemical. Credit NTU Singapore Usage Restrictions For this story only License Licensed content 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.