Navigation Links
Nature of bonding determines thermal conductivity
Date:5/3/2011

Jlich/Aachen, 3 May 2011 - Optical data carriers such as DVDs, Blu-rays and CD-RWs store data in layers of so-called "phase change materials". In the future, these materials will enable the development of fast, non-volatile and energy-saving main memories. A prerequisite for this is a low thermal conductivity. Phase change materials display a surprisingly low thermal conductivity even in the crystalline state. This is described by an international research team including scientists from Jlich and Aachen in the latest edition of the respected journal Advanced Functional Materials (DOI: 10.1002/adfm.201002274). Their findings will facilitate a targeted search for materials with the desired properties.

Phase change materials are among the favourite candidates for developing a "universal memory", which is as fast as DRAM (dynamic RAM), has high storage density, is always ready for use and does not lose data even when inadvertently turned off. The data is stored in tiny areas of different electrical resistance, which are written to by heating with the aid of electric pulses. In doing so, the atomic ordering of the material and its electrical resistance is changed.

When heated, phase change materials switch from the unordered (amorphous) to the ordered (crystalline) state, which leads to a change in their physical properties. This feature has been exploited by industry for many years in optical data carriers such as DVDs, Blu-rays and CD-RWs. By means of a laser, the atomic structure and thus the optical properties are changed in minute areas of the discs. This allows bits to be written to the disc and be read out again by a laser.

"In order to produce energy-saving and tightly packed electronic memories, it is important when the data are written to the disc that the electrical resistance is significantly changed but that the energy remains as localized as possible," explains Dr. Raphal Hermann from the Jlich Centre for Neutron Scie
'/>"/>

Contact: Angela Wenzik
a.wenzik@fz-juelich.de
49-246-161-6048
Helmholtz Association of German Research Centres
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. DOE JGI Director Eddy Rubin highlights the genomics of plant-based biofuels in the journal Nature
2. Natures Premium(R) Brand First Fresh Pork in North America to Carry DNA TraceBack(R) Seal of Authenticity
3. James L. Wittliff, Ph.D., FACB, to Present Predicting Breast Cancer Outcome with Gene Expression Signatures on the Ziplex(R) System at the Association for Molecular Pathology Conference, October 30
4. Genetic clock makers at UC San Diego publish their timepiece in Nature
5. MySignatureBook Certified Compliant With SAFE-BioPharma Digital Standard(TM)
6. Webcast Alert: Regulus Therapeutics, Alnylam Pharmaceuticals and Isis Pharmaceuticals Announce New Nature Publication on miR-21 Conference Call
7. Nature Medicine study shows Peregrines bavituximab can cure lethal virus infections
8. Research Published in Nature Medicine Shows Disruption of Chemokine Interactions Inhibits Atherosclerosis in Mice
9. Data Published in Nature Cell Biology Reveal Novel Function of Drug Target EpCAM in Cancer Cell Signalling
10. Light-speed nanotech: Controlling the nature of graphene
11. Nature Reviews Publishes Article About Jennerexs Multi-Mechanistic Cancer Therapeutic
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/10/2014)... July 10, 2014   Ceres, Inc . (Nasdaq: ... company, announced today financial results for the three months ... its business. Ceres reported that the company ... performance this growing season in Brazil, which concluded in ... company,s sorghum evaluation areas for part of the growing ...
(Date:7/10/2014)... A new study published today in the journal ... has found that time of day and sleep deprivation ... could be crucial when looking at the best time ... and heart disease, and for administering medicines effectively. , ... of Cancer Research, London, investigated the links between sleep ...
(Date:7/10/2014)... forever. Nanophysics makes sure of that. Mechanics researchers at Linkping ... Physical Review E . Knowledge that can be of ... be able to sit still forever, and walk around upside ... soon be able to buy smart new fasteners that hold ... is, sooner or later the grip is lost, no matter ...
(Date:1/15/2014)... , Using an approach akin to assembling a ... Standards and Technology (NIST) researchers have succeeded in ... reduces the flammability of foam commonly used in ... flammability of the nanotube-coated polyurethane foam was reduced ...
Breaking Biology Technology:Ceres Announces Fiscal Third Quarter 2014 Financial Results 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 3Ceres Announces Fiscal Third Quarter 2014 Financial Results 4Ceres Announces Fiscal Third Quarter 2014 Financial Results 5Ceres Announces Fiscal Third Quarter 2014 Financial Results 6Ceres Announces Fiscal Third Quarter 2014 Financial Results 7Ceres Announces Fiscal Third Quarter 2014 Financial Results 8Ceres Announces Fiscal Third Quarter 2014 Financial Results 9Time of day crucial to accurately test for diseases, new research finds 2Even geckos can lose their grip 2Layered security: Carbon nanotubes promise improved flame-resistant coating 2
... OnychoLase Laser Nail Center in ... Tokyo Vein Clinic visited , for a close up look at their laser nail treatment ... , ... Japanese have a long history of being on the cutting edge. They are by all ...
... ... METTLER TOLEDO has announced the release of iC Kinetics ... reactions by automatically developing a kinetic model that describes the influence ... The kinetic model can be used to simulate the effect of ...
... Germany , June 16, 2010 ,The medical devices company joimax(R) GmbH ... space" had already been the motto of,the last company move back in 2005. , ... The US market has an ... to Irvine, California , one,of high-tech industry centers in the United ...
Cached Biology Technology:OnychoLase Laser Nail Centers Making a Global Impact, By Bringing Western Medicine To The East 2A Faster Way to Understand and Optimize your Chemistry 2joimax(R) Moves Into Larger Premises 2
(Date:7/11/2014)... group members to reduce aggression and gain access to ... grooming activities shows a certain pattern across the day. ... Biology Letters . , Grooming between individuals in ... motives. To be groomed has hygienic benefits and is ... can provide access to infants, mating opportunities and high ...
(Date:7/11/2014)... Ume University, Sweden, have explored two different ways ... sequence leading to the formation of oxygen molecules ... in the scientific journal Nature Communications . ... day synthetic catalysts for water oxidation, which are ... the direct storage of solar energy in fuels ...
(Date:7/11/2014)... of kidney injury related to the use of hydroxyethyl ... HES molecules, according to a report in Anesthesia ... Research Society (IARS). , The "total mass of HES ... human renal proximal tubule cells (PTCs), concludes the laboratory ... Hospital Wrzburg, Austria. Other factorssuch as differences in ...
Breaking Biology News(10 mins):Baboons groom early in the day to get benefits later 2Molecular snapshots of oxygen formation in photosynthesis 2In lab studies, hydroxyethyl starch has direct harmful effects on kidney cells 2
... the common cold because there is scant evidence they ... the risks, according to a new systematic review of ... in the treatment of acute upper respiratory tract infections," ... the University of Auckland, New Zealand. "The implications for ...
... any given day, tens of thousands of biologists around ... a lightning-fast online algorithm called BLAST ?typically submitting 200 ... to be matched against the billions of letters for ... on functional or evolutionary relationships, scientists routinely use BLAST ...
... have identified a novel retroviral resistance gene, called FEZ1, that ... well as HIV-1, in cell culture. The researchers found that ... rat cell line caused a significant block to retroviral infection ... the viral DNA, but were excluded from entering the host ...
Cached Biology News:Doctors should stop prescribing antibiotics for the common cold, review advises 2Drawing with DNA: 'Bioart' illuminates genomics 2Drawing with DNA: 'Bioart' illuminates genomics 3
... gun low-pressure system, 220-240 V, is used for ... handheld device employs an adjustable helium pulse to ... from the inner wall of a small plastic ... be used for in situ, in vitro, in ...
... Hybridization Wash Pack provides optimized blocking ... Preparation Quality Clarifier: Ready-to-use wash solutions ... SigmaScreen(tm) APS Coated Slides for Microarrays ... Hybridization Blocking Buffer: 1L • Microarray ...
Mouse polyclonal antibody raised against a partial recombinant MHC2TA. NCBI Entrez Gene ID = 4261...
Mouse monoclonal antibody raised against a partial recombinant JRKL. NCBI Entrez Gene ID = JRKL...
Biology Products: