Home > News > Fingerprints revealed by nanotechnology
March 12th, 2007
Fingerprints revealed by nanotechnology
Abstract:
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.
Source:
rsc.org
Bookmark:
| Related News Press |
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters
Leading the charge to better batteries February 28th, 2025
Quantum interference in molecule-surface collisions February 28th, 2025
New ocelot chip makes strides in quantum computing: Based on "cat qubits," the technology provides a new way to reduce quantum errors February 28th, 2025
Human Interest/Art
New 2D multifractal tools delve into Pollock's expressionism January 17th, 2025
Drawing data in nanometer scale September 30th, 2022
Scientists prepare for the world’s smallest race: Nanocar Race II March 18th, 2022
Graphene nanotubes revolutionize touch screen use for prosthetic hands August 3rd, 2021
 |
||
 |
||
| The latest news from around the world, FREE | ||
 |
||
|
|
||
| Premium Products | ||
 |
||
|
Only the news you want to read!
Learn More |
||
 |
||
|
Full-service, expert consulting
Learn More |
||
|
|
||