Immunoassay (image) Princeton University, Engineering School Caption Immunoassays are commonly performed in a set of glass vials such as the one shown here. The nanomaterial invented at Princeton to increase the sensitivity of the test could be added as a microscopic layer to the glass. Credit Frank Wojciechowski Usage Restrictions For news and other non-commercial uses 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.