Arizona State University professor NJ Tao explains a new imaging technology to aid the detection of trace chemicals.
(Photo Credit: Jemal LeonardBiodesign InstituteArizona State University)
The ridges of a single fingerprint can be seen against an orange background. As a potential is applied, trace amounts of TNT come into view, ranging in color from bright yellow dots to black, depending on the concentration.
(Photo Credit: NJ Tao, Biodesign Institute at Arizona State University)
Source: Arizona State University