Navigation Links
A new take on the Midas touch -- changing the color of gold
Date:10/25/2012

Red gold, green gold a ground-breaking initiative has found a way of changing the colour of the world's most iconic precious metal.

A University of Southampton team have discovered that by embossing tiny raised or indented patterns onto the metal's surface they can change the way it absorbs and reflects light ensuring our eyes don't see it as 'golden' in colour at all.

The finding results from a major initiative funded by the Engineering and Physical Sciences Research Council (EPSRC) targeting the development of a new generation of nanotechnology-enabled materials.

Equally applicable to other metals such as silver and aluminium, this breakthrough opens up the prospect of colouring metals without having to coat or chemically treat them. This could deliver valuable economic, environmental and other benefits.

The technique could be harnessed in a wide range of industries for anything from manufacturing jewellery to making banknotes and documents harder to forge.

"This is the first time the visible colour of metal has been changed in this way," says Professor Nikolay Zheludev, Deputy Director of Southampton's Optoelectronics Research Centre, who led the project.

"The colours of the objects we see all around us are determined by the way light interacts with those objects. For instance, an object that reflects red light but absorbs other wavelengths will appear red to the human eye.

"This is the fundamental principle we have exploited in this project. By embossing metals with patterns only around 100 nanometres across, we've found that we can control which wavelengths of light the metal absorbs and which it reflects." *

The precise shape and height or depth of the patterns determine exactly how light behaves when it strikes the metal and therefore what colour is created. The technique can be used to produce a wide range of colours on a given metal.

A silver ring, for example, could be decorated with a number of different patterns, making one part of it appear red, another part green and so on; metal features with sophisticated optical properties that would be almost impossible to imitate could be incorporated into documents as security features.

The nano-patterning is carried out at the research level using well-established techniques such as ion beam milling, which may be envisaged as sand-blasting on the atomic scale.

However, the concept may be scaled for industrial production using such processes as nano-imprint, whereby large areas are stamped out from a master template in a manner comparable to CD/DVD production.

"We've filed a patent application to cover our work," Professor Zheludev says, "and we're currently talking to a number of organisations about taking our breakthrough towards commercialisation."


'/>"/>
Contact: EPSRC Press Office
pressoffice@epsrc.ac.uk
01-793-444-404
Engineering and Physical Sciences Research Council
Source:Eurekalert

Related biology technology :

1. Light touch keeps a grip on delicate nanoparticles
2. New Competitive Arena Emerges for Pharmaceutical Companies in Healthcares Changing Payment Landscape, Finds PwC Health Research Institute Study
3. Pinnaclife To Sponsor The Nebraska Academy of Nutrition and Dietetics Fuel Up With Color 5K And 1 Mile Fun Run
4. AMRESCO Offers New Prism Protein Marker With Vibrant Colors For Easy Band Identification
5. BiOptix continues support of Colorado-based research institutions
6. All the colors of a high-energy rainbow, in a tightly focused beam
7. Donor Alliance Honored By Colorado Legislature In Observation Of National Donate Life Month
8. Jennerex Announces First Patient Treated in Phase 1/2 Clinical Trial of JX-594 in Combination with Irinotecan in Patients with Metastatic Colorectal Cancer
9. Metal nanoparticles shine with customizable color
10. Scientists solve mystery of colorful armchair nanotubes
11. LABS, Inc. Among Colorados Top Private Companies
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2017)... ... March 23, 2017 , ... Ellen Matloff, president and ... Council (CTC) as a 2017 Women of Innovation® finalist. Matloff will be among ... Dinner. , The dinner recognizes women accomplished in science, technology, engineering and math ...
(Date:3/23/2017)... According to a report by Transparency Market ... due to the presence of a large pool of participants; however, ... , and Sigma-Aldrich, compete with each other in this market. With ... than 76% of this market in 2016.  ... As of now, a large number of ...
(Date:3/23/2017)... Orleans, La. (PRWEB) , ... March 23, 2017 ... ... real-time, industrial monitoring solutions, today announced the hire of Dr. Sigmund “Sig” Floyd ... APMT customer applications, strategic partnerships and joint development activities. , “Dr. Floyd’s career ...
(Date:3/22/2017)... , March 22, 2017  Ascendis Pharma ... its innovative TransCon technology to address significant unmet ... results for the full year ended December 31, ... year for our company as we broadened our ... leading, integrated rare disease company with an initial ...
Breaking Biology Technology:
(Date:2/27/2017)... --  Strategic Cyber Ventures , the industry,s first cybersecurity ... million investment in  Polarity , the first commercial human ... based and is led by cybersecurity veterans Tom ... Gula , also a longtime cybersecurity veteran and founder ... A round of funding. This new funding will be ...
(Date:2/24/2017)... , Feb. 24, 2017  EyeLock LLC, a leader of ... elite iris biometric solution on the latest Qualcomm® ... at Mobile World Congress 2017 (February 27 ... in Hall 3, Stand 3E10. ... Haven™ security platform—a combination of hardware, software ...
(Date:2/21/2017)... N.Y. and PORTLAND, Ore. ... ) and the Avamere Family of Companies (Avamere Health ... today announced a six-month research study that will apply ... improve eldercare at senior living and health centers. By ... Avamere hopes to gain insights into physical and environmental ...
Breaking Biology News(10 mins):