Electrochemical method reads fingerprints more easily
Chemical Technology, Volume 2007, 11, 18 October 2007
http://digbig.com/4txjb
"Swiss scientists have developed a way to detect fingerprints by measuring the chemical traces they leave on a surface. Using a scanning electrochemical microscope (SECM) to detect invisible traces of sweat and natural skin oils, the team created a chemical picture of a fingerprint."