- About Us
- Career Center
- Nano-Social Network
- Nano Consulting
- My Account
March 12th, 2007
Hidden fingerprints can now be revealed quickly and reliably thanks to two developments in nanotechnology.
The current way of revealing hidden prints involves coating the marked surface with a watery suspension of gold nanoparticles, stabilised by citrate ions. Under acid conditions, the gold particles stick to the positively-charged molecules in the fingerprint. The print is then developed with a solution of silver ions, which undergo a chemical reaction to leave an outline of dark silver metal along the characteristic ridges of the fingerprint. But the gold solution is quite unstable, and the technique is difficult to reproduce from one test to another.
|Related News Press|
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers
Fighting cancer with sticky nanoparticles September 27th, 2016
Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016
Call for NanoArt and Art-Science-Technology Papers June 9th, 2016
Are humans the new supercomputer?Today, people of all backgrounds can contribute to solving serious scientific problems by playing computer games. A Danish research group has extended the limits of quantum physics calculations and simultaneously blurred the boundaries between mac April 14th, 2016