(IMAGE) Concordia University Caption Steve Shih: "We believe this type of sensing can be used for other fields like environmental sampling of heavy metal contamination and cancer and disease diagnostics.” Credit Concordia University Usage Restrictions None License Original 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.