Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Ultra-Sensitive Graphene Device For Spintronics

Abstract:
A European team of researchers has developed a graphene-based device capable of detecting tiny magnetic fields with a record sensitivity down to the stray field of few magnetic molecules. The researchers have used graphene as a kind spider's web to chemically trap the molecules and detect their magnetization at the same time. This breakthrough in spintronics opens the ways to applications for ultra-high density storage memories and for molecular sensors.

Ultra-Sensitive Graphene Device For Spintronics

Italy | Posted on June 28th, 2011

The study is published this month in the journal Nano Letters. The work has been performed by scientists from the S3 Center of Istituto Nanoscienze-Cnr, the Insitut Néel - CNRS, and the Karlsruhe Institute of Technology.

Magnetic molecules, nano-magnets only few billionth of meter small, are considered very promising for spintronics (electronics exploiting also the spin of the electron), since they can store a bit of information in a very small volume. In order to develop a new generation of magnetic memories it is crucial to be able to "read" tiny units that will soon reach the molecular size.

The new ultra-sensitive device realized enables the magnetic reading at the molecular scale. "It is the first time that such tiny objects are detected", says Andrea Candini, researcher at the Istituto Nanoscienze-Cnr, "just to make clear, the previous record of sensitivity has been beaten by a factor of 100".

To realize the device, the team deposited magnetic molecules on a sheet of graphene, the one atom-thick layer of Carbon famous for its amazing properties. Graphene works as a sort of spider's web able to chemically trap the molecules, to capture their magnetic flux and generate a corresponding electrical signal. This result is the outcome of a 3-year long research.. "Firstly, we synthesized molecules suitable to graft the graphene honeycomb lattice, then we tailored the graphene sheet realizing a device of about 10 nanometers in size; finally, we performed electrical measurements at very low temperatures, in order to limit the noise ".

According to the team of researchers, this result "shows that it is possible to use graphene coupled to magnetic molecules to store information, as.the new device works similarly to the spin valve present in a reading head of today's hard disks, but it is much smaller" says Andrea Candini, "We also foresee applications to detect bio-molecules marked with a single magnetic molecule, such as ultra-sensitive sensors to be integrated in a lab-on-a-chip. " Both of these objectives are in line with the goals of large-scale initiatives such as the Flagship Pilot Actions recently launched by the European Commission on related themes.

Full bibliographic information

Graphene Spintronic Devices with Molecular Nanomagnets
Andrea Candini, Svetlana Klyatskaya, Mario Ruben, Wolfgang Wernsdorfer, and Marco Affronte
DOI: 10.1021/nl2006142 http://pubs.acs.org/doi/abs/10.1021/nl2006142

####

About CNR-Consiglio Nazionale delle Ricerche
S3 is a national research center devoted to nanoscience based on a multidisciplinary approach and close interaction between experimental and theoretical activities. It is part of the Istituto Nanoscienze of the Italian Research Council (Cnr). S3 research aims at investigating and designing matter and functions at the nanoscale, as well as understanding and controlling their impact on the properties of macroscopic systems. S3 is located within the scientific campus of the University of Modena and Reggio Emilia and is based on a very close collaboration with several Departments of the University. S3 is a lively and international environment, that attracts excellent young researchers and students, and offers to them facilities designed to meet the laboratory and research needs.

For more information, please click here

Contacts:
Marco Ferrazzoli
00390649933383
mobile 0039 347 0778836

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

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

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

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

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

Graphene/ Graphite

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

From hot to cold: How to move objects at the nanoscale: Moving a single gold nanocluster on a graphene membrane, thanks to a thermal gradient applied to the borders: a new study sheds light on the physical mechanisms driving this phenomenon August 10th, 2017

Controlled manipulation: Scientists at FAU are investigating the properties of hybrid systems consisting of carbon nanostructures and a dye August 8th, 2017

Spintronics

Smart multi-layered magnetic material acts as an electric switch: New study reveals characteristic of islands of magnetic metals between vacuum gaps, displaying tunnelling electric current March 1st, 2017

First experimental proof of a 70 year old physics theory: First observation of magnetic phase transition in 2-D materials, as predicted by the Nobel winner Onsager in 1943 January 6th, 2017

Investigations of the skyrmion Hall effect reveal surprising results: One step further towards the application of skyrmions in spintronic devices December 28th, 2016

Electron highway inside crystal December 12th, 2016

Memory Technology

Surprise discovery in the search for energy efficient information storage August 10th, 2017

Liquid electrolyte contacts for advanced characterization of resistive switching memories July 26th, 2017

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Pulses of electrons manipulate nanomagnets and store information: Scientists use electron pulses to create and manipulate nanoscale magnetic excitations that can store data July 21st, 2017

Sensors

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

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

Sensing technology takes a quantum leap with RIT photonics research: Office of Naval Research funds levitated optomechanics project August 10th, 2017

Giant enhancement of electromagnetic waves revealed within small dielectric particles: Scientists have done for the first time direct measurements of giant electromagnetic fields July 8th, 2017

Announcements

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

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

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