Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > News > The changing color of gold

November 21st, 2007

The changing color of gold

Abstract:
The copper ion Cu2+ is essential in biochemistry but can be toxic in high concentrations. Now, thanks to work by two chemists in the US, it can be detected with greater sensitivity ("Colorimetric Cu2+ detection with a ligation DNAzyme and nanoparticles").

Cu2+ has so far proved challenging to detect using conventional fluorescent sensors due to its quenching effect on fluorophores. To overcome this problem, Juewen Liu and Yi Lu at the University of Illinois at Urbana-Champaign used a colour change that takes place in a solution of gold nanoparticles as a selective and sensitive Cu2+ sensor.

Source:
nanowerk.com

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Discoveries

DNA sensor system developed for specific and sensitive measurement of cancer-relevant enzyme activity August 23rd, 2017

Lego proteins revealed: Self-assembling protein complexes based on a single mutation could provide scaffolding for nanostructures August 23rd, 2017

Heating quantum matter: A novel view on topology: Physicists demonstrate how heating up a quantum system can be used as a universal probe for exotic states of matter August 22nd, 2017

A Tougher Tooth: A new dental restoration composite developed by UCSB scientists proves more durable than the conventional material August 22nd, 2017

Materials/Metamaterials

Lego proteins revealed: Self-assembling protein complexes based on a single mutation could provide scaffolding for nanostructures August 23rd, 2017

A Tougher Tooth: A new dental restoration composite developed by UCSB scientists proves more durable than the conventional material August 22nd, 2017

Silk could improve sensitivity, flexibility of wearable body sensors August 20th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Announcements

DNA sensor system developed for specific and sensitive measurement of cancer-relevant enzyme activity August 23rd, 2017

Lego proteins revealed: Self-assembling protein complexes based on a single mutation could provide scaffolding for nanostructures August 23rd, 2017

Heating quantum matter: A novel view on topology: Physicists demonstrate how heating up a quantum system can be used as a universal probe for exotic states of matter August 22nd, 2017

A Tougher Tooth: A new dental restoration composite developed by UCSB scientists proves more durable than the conventional material August 22nd, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project