Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Sieve holds nanoparticles and acts as solar absorber: Scientists of the “Helmholtz-University Young Investigators Group” from Kiel and Geestacht in Germany publish their research results

The Nanofluid with particles of gold (left) and the solution filtered (right). All metal paticles are filtered out. Copyright: CAU, Photo: Claudia Eulitz
The Nanofluid with particles of gold (left) and the solution filtered (right). All metal paticles are filtered out.

Copyright: CAU, Photo: Claudia Eulitz

Abstract:
A membrane consisting of polymer fibres and proteins makes a novel filter for tiny, nano-scaled particles in aqueous solutions. The result of such a research, which was done by Professor Mady Elbahri and his team from the Institute of Material Science at Kiel University (KU) and the Institute of Polymer Research at Helmholtz-Zentrum Geesthacht (HZG), has recently been published as the cover article in the current issue (21.11.2012) of Advanced Functional Materials.

Sieve holds nanoparticles and acts as solar absorber: Scientists of the “Helmholtz-University Young Investigators Group” from Kiel and Geestacht in Germany publish their research results

Kiel, Germany | Posted on November 27th, 2012

A Nanofluid, which means a colloidal suspension of e.g. metal nanoparticles in water, passes easily through commonly used macroporous polymeric membranes. The particles are too small to be held using hole diameters between three and four micrometers. In addition, the particles would block smaller sieve openings rapidly. Hence, pressure would be necessary to filter out the fluid.

In order to solve these problems, Elbahri and his team biofunctionalized their membrane and added a commercially available protein to the fibres. "We found out that the protein undergoes a conformational change under water, and its ability to capture all the metal nanoparticles during the filtration process is activated", explains Elbahri. "This is a breakthrough", adds Co-author Dr. Shahin Homaeigohar. "The same principle will hopefully enable us, to filter biomolecules and organisms out of waste water."

From Filtration to solar thermal energy

When the nano sieve captures metal particles such as gold, another application is at hand, because, no other method has succeeded in dispersing the particles that well. "This result was unexpected", says Elbahri. "Under dry conditions, the membrane shows the color of the metal, in this case the red of the gold nanoparticles". When the membrane gets wet, it becomes black. "Then, it acts as an omnidirectional perfect black absorber, which can be used as a solar absorber." Elbahri adds: "Indeed we bridge the gaps between several disciplines, chemistry, physics, bioscience and materials science that is, and the Nanochemistry and Nanoengineering group has now initiated the first step toward intradisciplinarity of Nanoscience."

Application as a virus and bio-filter

The nano sieve will allow filtering very small particles or biomolecules and organisms such as viruses out of water. The scientists involved have already patented their innovation, a bio-nano-composite, in Europe. Another patent for the USA is . Besides its application in water filtration, the nano sieve shows great potentials as solar absorber and as a catalyser. "All in all, the result is a breakthrough towards the design of an operative filtration process, as a new route for the fabrication of functional materials, and offers commercially attractive efficiencies at a low cost", says Elbahri.

Full bibliographic information

"Smart Metal-Polymer Bionanocomposites as Omnidirectional Plasmonic Black Absorber by Nanofluid Filtration"; Mady Elbahri, Shahin Homaeigohar, Ramzy Abdelaziz, Tianhe Dai, Rania Khalil, Ahnaf Usman Zillohu. DOI: 10.1002/adfm.201200768, Advanced Functional Materials, 22, 4771, 2012

####

For more information, please click here

Contacts:
Boris Pawlowski


Prof. Dr. Mady Elbahri
Phone: +49 431 880-6230

or

Copyright © AlphaGalileo

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

GrapheneCanada 2016 International Conference: Recent advances in technology developments and business opportunities in graphene commercialization August 31st, 2016

FEI Celebrates Shipment of 1,000th Helios DualBeam System: FEI’s Helios Family has lead the DualBeam technology race and is widely used across the semiconductor, materials science, life sciences and oil & gas industries August 31st, 2016

Colors from darkness: Researchers develop alternative approach to quantum computing August 31st, 2016

Diamonds and quantum information processing on the nano scale August 31st, 2016

Nanomedicine

Particle Works launches range of high quality magnetic nanoparticles August 31st, 2016

Designing ultrasound tools with Lego-like proteins August 29th, 2016

Nanofiber scaffolds demonstrate new features in the behavior of stem and cancer cells August 25th, 2016

Johns Hopkins scientists track metabolic pathways to find drug combination for pancreatic cancer August 25th, 2016

Discoveries

FEI Celebrates Shipment of 1,000th Helios DualBeam System: FEI’s Helios Family has lead the DualBeam technology race and is widely used across the semiconductor, materials science, life sciences and oil & gas industries August 31st, 2016

Colors from darkness: Researchers develop alternative approach to quantum computing August 31st, 2016

Diamonds and quantum information processing on the nano scale August 31st, 2016

Device to control 'color' of electrons in graphene provides path to future electronics August 31st, 2016

Announcements

GrapheneCanada 2016 International Conference: Recent advances in technology developments and business opportunities in graphene commercialization August 31st, 2016

FEI Celebrates Shipment of 1,000th Helios DualBeam System: FEI’s Helios Family has lead the DualBeam technology race and is widely used across the semiconductor, materials science, life sciences and oil & gas industries August 31st, 2016

Colors from darkness: Researchers develop alternative approach to quantum computing August 31st, 2016

Diamonds and quantum information processing on the nano scale August 31st, 2016

Energy

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

Lehigh engineer discovers a high-speed nano-avalanche: New findings published in the Journal of Electrochemical Society about the process involving transformations in glass that occur under intense electrical and thermal conditions could lead the way to more energy-efficient glas August 24th, 2016

New flexible material can make any window 'smart' August 23rd, 2016

Researchers reduce expensive noble metals for fuel cell reactions August 22nd, 2016

Research partnerships

Device to control 'color' of electrons in graphene provides path to future electronics August 31st, 2016

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

New theory could lead to new generation of energy friendly optoelectronics: Researchers at Queen's University Belfast and ETH Zurich, Switzerland, have created a new theoretical framework which could help physicists and device engineers design better optoelectronics August 23rd, 2016

A new way to display the 3-D structure of molecules: Metal-organic frameworks provide a new platform for solving the structure of hard-to-study samples August 21st, 2016

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







Car Brands
Buy website traffic