Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Taking Shape: Metamorphic Nanocomposites

Abstract:
The development of materials with magnetically adjustable properties has been presented by a German research team from the Helmholtz-Zentrum Geesthacht (HZG) Centre for Biomaterial Development in Teltow. Triple-shape polymers are able to perform two distinct changes in shape when heated, if the shape changes are programmed beforehand by application of a specific thermomechanical procedure. When heated, the materials change at predefined switching temperatures from the current shape to the first memorized shape and from there to the second memorized shape. By application of magnetic fields with different field strengths the switching temperatures of such composites can be adjusted in a controlled manner.

Taking Shape: Metamorphic Nanocomposites

Germany | Posted on September 6th, 2011

These novel actively moving "Triple-Shape Nanocomposites" are composed of a polymer matrix consisting of two different crystallisable polymer chain segment types, which are linked by chemical bonds, and embedded iron oxide nanoparticles. Each crystallisable segment type can memorize one specific shape. The magnetic particles get heated by the applied weak, alternating magnetic field and serve thereby as an additional heating source. The higher this energy contribution, the lower the environmental temperature at which the shape changes will occur.

Advertisement
Geek 2 Geek dating


The reported adjustability of the switching temperatures of the nanocomposites is based on the combination of direct heating by increasing the environmental temperature and indirect heating by the exposure of the embedded iron-oxide nanoparticles to an alternating magnetic field. Only this combination of two different heating sources allows a controlled manipulation of the switching temperatures, which are defined as environmental temperatures where the shape changes occur.

The controlled decrease of the switching temperatures by application of weak magnetic fields allows the realization of applications where an initialization of a triple-shape effect solely by environmental heating of the device has not been applicable before.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

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 Links

U. Narendra Kumar et al., Adv. Mater. ; DOI: 10.1002/adma.201102251

Related News Press

News and information

NUS researchers invent new test kit for quick, accurate and low-cost screening of diseases: Test results are denoted by a color change and could be further analyzed by a smartphone app, making it attractive as a point-of-care diagnostic device September 19th, 2018

Silver nanoparticles are toxic for aquatic organisms: A research team at the UPV/EHU-University of the Basque Country has analysed how zebrafish are affected in the long term by exposure to silver particles September 19th, 2018

Leti Announces EU Project to Develop Powerful, Inexpensive Sensors with Photonic Integrated Circuits: REDFINCH Members Initially Targeting Applications for Gas Detection and Analysis For Refineries & Petrochemical Industry and Protein Analysis for Dairy Industry September 19th, 2018

Researchers develop microbubble scrubber to destroy dangerous biofilms September 19th, 2018

Nanomedicine

NUS researchers invent new test kit for quick, accurate and low-cost screening of diseases: Test results are denoted by a color change and could be further analyzed by a smartphone app, making it attractive as a point-of-care diagnostic device September 19th, 2018

Researchers develop microbubble scrubber to destroy dangerous biofilms September 19th, 2018

Halas wins American Chemical Society Award in Colloid Chemistry: Rice University nanophotonics pioneer honored for colloid research September 18th, 2018

A Comprehensive Guide: The Future of Nanotechnology September 13th, 2018

Discoveries

NUS researchers invent new test kit for quick, accurate and low-cost screening of diseases: Test results are denoted by a color change and could be further analyzed by a smartphone app, making it attractive as a point-of-care diagnostic device September 19th, 2018

Silver nanoparticles are toxic for aquatic organisms: A research team at the UPV/EHU-University of the Basque Country has analysed how zebrafish are affected in the long term by exposure to silver particles September 19th, 2018

Researchers develop microbubble scrubber to destroy dangerous biofilms September 19th, 2018

New photonic chip promises more robust quantum computers September 14th, 2018

Materials/Metamaterials

How a tetrahedral substance can be more symmetrical than a spherical atom: A new type of symmetry September 14th, 2018

Peering into private life of atomic clusters -- using the world's tiniest test tubes September 6th, 2018

Cannibalistic materials feed on themselves to grow new nanostructures September 1st, 2018

Environmentally friendly photoluminescent nanoparticles for more vivid display colors: Osaka University-led researchers created a new type of light-emitting nanoparticle that is made of ternary non-toxic semiconductors to help create displays and LED lighting with better colors t August 29th, 2018

Announcements

NUS researchers invent new test kit for quick, accurate and low-cost screening of diseases: Test results are denoted by a color change and could be further analyzed by a smartphone app, making it attractive as a point-of-care diagnostic device September 19th, 2018

Silver nanoparticles are toxic for aquatic organisms: A research team at the UPV/EHU-University of the Basque Country has analysed how zebrafish are affected in the long term by exposure to silver particles September 19th, 2018

Leti Announces EU Project to Develop Powerful, Inexpensive Sensors with Photonic Integrated Circuits: REDFINCH Members Initially Targeting Applications for Gas Detection and Analysis For Refineries & Petrochemical Industry and Protein Analysis for Dairy Industry September 19th, 2018

Researchers develop microbubble scrubber to destroy dangerous biofilms September 19th, 2018

Textiles/Clothing

UVA multidisciplinary engineering team designs technology for smart materials: The invention could lead to devices and manufactured goods, such as fabrics, that can dynamically regulate between thermally insulating and cooling August 17th, 2018

Carbon is the new black: Researchers use carbon nanotubes to develop clothing that can double as batteries July 10th, 2018

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

Carbodeon demonstrates NanoDiamond nickel coatings with enhanced tribological properties June 7th, 2017

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project