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

Collaboration yields discovery of 12-sided silica cages June 20th, 2018

JPK talks with Dr Frank Lafont, Director of the BioImaging Center Lille (BICeL) about the use of the NanoWizardŽ AFM together with fluorescence microscopy in the study of living cells June 19th, 2018

Powering the 21st Century with Integrated Photonics: UCSB-Led Team Selected for Demonstration of a Novel Waveguide Platform Which is Transparent Throughout the MWIR and LWIR Spectral Bands June 19th, 2018

Executives Explore Key Megatrends and Innovations in MEMS, Sensors, Imaging Tech at SEMI-MSIG European Summits: Speakers to share developments in smart automotive, smart cities, smart industrial, biomedical, consumer and IoT, September 19-21, 2018 in Grenoble, France June 19th, 2018

Nanomedicine

Collaboration yields discovery of 12-sided silica cages June 20th, 2018

JPK talks with Dr Frank Lafont, Director of the BioImaging Center Lille (BICeL) about the use of the NanoWizardŽ AFM together with fluorescence microscopy in the study of living cells June 19th, 2018

Camouflaged nanoparticles used to deliver killer protein to cancer June 17th, 2018

Graphene carpets: So neurons communicate better: Research by SISSA reveals that graphene can strengthen neuronal activity, confirming the unique properties of this nanomaterial. The study has been published on Nature Nanotechnology June 13th, 2018

Discoveries

Collaboration yields discovery of 12-sided silica cages June 20th, 2018

Carbon nanotube optics poised to provide pathway to optical-based quantum cryptography and quantum computing: Researchers are exploring enhanced potential of carbon nanotubes for unique applications June 18th, 2018

Camouflaged nanoparticles used to deliver killer protein to cancer June 17th, 2018

Squeezing light at the nanoscale: Ultra-confined light could detect harmful molecules June 17th, 2018

Materials/Metamaterials

Making quantum puddles: Physicists discover how to create the thinnest liquid films ever June 13th, 2018

Nickel ferrite promotes capacity and cycle stability of lithium-sulfur battery June 13th, 2018

Evidence for a new property of quantum matter revealed: Electrical dipole activity detected in a quantum material unlike any other tested June 11th, 2018

Nano-saturn: Supramolecular complex formation: Anthracene macrocycle and C60 fullerene June 8th, 2018

Announcements

Collaboration yields discovery of 12-sided silica cages June 20th, 2018

JPK talks with Dr Frank Lafont, Director of the BioImaging Center Lille (BICeL) about the use of the NanoWizardŽ AFM together with fluorescence microscopy in the study of living cells June 19th, 2018

Powering the 21st Century with Integrated Photonics: UCSB-Led Team Selected for Demonstration of a Novel Waveguide Platform Which is Transparent Throughout the MWIR and LWIR Spectral Bands June 19th, 2018

Executives Explore Key Megatrends and Innovations in MEMS, Sensors, Imaging Tech at SEMI-MSIG European Summits: Speakers to share developments in smart automotive, smart cities, smart industrial, biomedical, consumer and IoT, September 19-21, 2018 in Grenoble, France June 19th, 2018

Textiles/Clothing

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

New ultrafast flexible and transparent memory devices could herald new era of electronics April 1st, 2017

'Back to the Future' inspires solar nanotech-powered clothing November 15th, 2016

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