A novel method is disclosed wherein polymerized crystalline colloidal array (PCCA) chemical sensing materials are used to detect the presence of certain chemical species in high ionic strength solutions, such as bodily fluids. The PCCA sensors consist of a mesoscopically periodic array of colloidal particles...http://www.google.com/patents/US6753191?utm_source=gb-gplus-sharePatent US6753191 - Polymerized crystalline colloidal array chemical sensing materials for use in high ionic strength solutions
