November 2009 Volume 8 Number 11, pp 851 - 916
Visit Nature Materials online to browse the journal.
Now available at
http://links.ealert.nature.com/ctt?kn=101&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Please note that you need to be a subscriber to enjoy full text access
to Nature Materials online. To purchase a subscription, please visit:
http://links.ealert.nature.com/ctt?kn=76&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Alternatively, to recommend a subscription to your library, please visit
http://links.ealert.nature.com/ctt?kn=37&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
=========================== ADVERTISEMENT ===========================
AIMResearch http://links.ealert.nature.com/ctt?kn=81&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
NOW OPEN and FREE! AIMResearch - focused research at the cutting edge
of materials science
Bulk metallic glass: Spiked with silicon
The incorporation of small amounts of silicon into a metallic glass
enhances ductility without inhibiting its glass-forming ability
http://links.ealert.nature.com/ctt?kn=2&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Electron microscopy: What lies beneath
A technique for imaging impurity atoms at a buried interface provides a
useful tool for understanding the behavior of polycrystalline materials
http://links.ealert.nature.com/ctt?kn=89&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Keep up to date by registering for AIMResearch e-alerts!
http://links.ealert.nature.com/ctt?kn=87&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
=====================================================================
=========================== ADVERTISEMENT ===========================
RIKEN RESEARCH http://links.ealert.nature.com/ctt?kn=19&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
*NEW LOOK* RIKEN RESEARCH - 100% redesign, find out what's new!
RIKEN RESEARCH reports on the most exciting research from one of Japan's
largest research organizations, RIKEN, for free.
http://links.ealert.nature.com/ctt?kn=50&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Highlights
Innovation via genetic 'googling'
http://links.ealert.nature.com/ctt?kn=59&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Solving the riddle of the turtle shell
http://links.ealert.nature.com/ctt?kn=57&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Keep up to date by registering for RIKEN RESEARCH e-alerts!
http://links.ealert.nature.com/ctt?kn=60&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
=====================================================================
=========================== ADVERTISEMENT ===========================
Call for papers - Nature Communications
Nature Communications, an innovative new online science journal,
launching in Spring 2010, is now accepting submissions. The journal
will provide a unique forum for the rapid publication of high-quality
Articles, from short communications to more in-depth studies, covering
all areas of the physical, chemical and biological sciences.
Submit now
http://links.ealert.nature.com/ctt?kn=66&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
=====================================================================
----------------------
EDITORIAL
----------------------
UNCERTAIN NEXT STEPS p851
doi:10.1038/nmat2556
The future role of NASA in human space exploration remains economically
uncertain. Should materials scientists care?
http://links.ealert.nature.com/ctt?kn=91&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
----------------------
RESEARCH HIGHLIGHTS
----------------------
OUR CHOICE FROM THE RECENT LITERATURE p852
doi:10.1038/nmat2555
http://links.ealert.nature.com/ctt?kn=78&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
----------------------
NEWS AND VIEWS
----------------------
OXIDE DIELECTRICS: A CHANGE OF DIRECTION pp853 - 854
Hagen Klauk
doi:10.1038/nmat2552
Field-effect transistors, regardless of whether they use an organic or
an inorganic semiconductor, require a gate dielectric with a large
relative permittivity. A once-popular layered electrolyte may be just
the right material for the job.
http://links.ealert.nature.com/ctt?kn=80&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
MAGNETIC SHAPE MEMORY: MAGNETOELASTIC SPONGES pp854 - 855
Mehmet Acet
doi:10.1038/nmat2551
Nickel-manganese-gallium foams connected internally by sizeable
single-crystalline elements provide magnetic-field-induced strains
comparable to free-standing bulk single crystals, and demonstrate
feasibility for the application of magnetic shape memory.
http://links.ealert.nature.com/ctt?kn=82&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
BIODEGRADABLE ALLOYS: THE GLASS WINDOW OF OPPORTUNITIES pp855 - 857
Evan Ma and Jian Xu
doi:10.1038/nmat2550
Crystalline alloys often fall short in providing certain key properties
desired for biomedical applications. But by using metallic glasses
instead, problems such as hydrogen evolution can be dramatically reduced
in biodegradable magnesium alloys.
http://links.ealert.nature.com/ctt?kn=100&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
CARBON NANOTUBES: NOT THAT SLIPPERY pp857 - 858
Ruben Perez
doi:10.1038/nmat2553
Friction measurements on carbon nanotubes show a remarkable anisotropy,
the origin of which can be traced to the activation of specific
deformation modes of energy dissipation.
http://links.ealert.nature.com/ctt?kn=95&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
ORGANIC ELECTRONICS: ELECTRICAL CONTACTS pp858 - 860
Natalie Stingelin
doi:10.1038/nmat2562
Further achievements in the realm of organic and molecular
electronics - even at the level of device applications - requires greater
understanding of the materials at a fundamental level. This insight can
only come with input from researchers in several disciplines working
together on the materials from different perspectives.
http://links.ealert.nature.com/ctt?kn=94&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
MATERIAL WITNESS: SHAKING HANDS WITH ROBOTS p860
Philip Ball
doi:10.1038/nmat2554
http://links.ealert.nature.com/ctt?kn=104&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
----------------------
LETTERS
----------------------
GIANT MAGNETIC-FIELD-INDUCED STRAINS IN POLYCRYSTALLINE Ni-Mn-Ga FOAMS pp863 - 866
M. Chmielus et al.
doi:10.1038/nmat2527
The magnetic-field-induced strain in magnetic shape-memory alloys can
be used in several types of application. However, the strain is high
(10%) only in single-crystalline specimens, which are difficult and
expensive to obtain. Polycrystalline samples with comparable strain have
now been fabricated by introducing pores of similar size to the grains.
Abstract: http://links.ealert.nature.com/ctt?kn=47&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=85&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
PLASMONIC NANOROD METAMATERIALS FOR BIOSENSING pp867 - 871
A. V. Kabashin et al.
doi:10.1038/nmat2546
Plasmonic biosensors are either based on freely propagating surface
plasmons or plasmons localized at nanostructures. Despite advantages
such as quantitative detection, localized surface-plasmon sensors have
shown lower overall sensitivities. A nanorod metamaterial supporting
new plasmonic modes is now shown to considerably outperform earlier
plasmonic biosensors by combining and expanding their respective
advantages.
Abstract: http://links.ealert.nature.com/ctt?kn=46&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=25&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
APPLICATION OF A QUARTZ-CRYSTAL MICROBALANCE TO MEASURE IONIC FLUXES
IN MICROPOROUS CARBONS FOR ENERGY STORAGE pp872 - 875
Mikhael D. Levi et al.
doi:10.1038/nmat2559
Conventional electroanalytical and structure-analysis techniques provide
limited information about ionic fluxes in electrochemical systems. A
quartz-crystal microbalance is now used as a gravimetric probe of the
concentration and compositional changes in microporous activated carbon.
Abstract: http://links.ealert.nature.com/ctt?kn=51&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=30&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
HINDERED ROLLING AND FRICTION ANISOTROPY IN SUPPORTED CARBON NANOTUBES
pp876 - 881
Marcel Lucas et al.
doi:10.1038/nmat2529
When a tip slides on a carbon nanotube, the friction along the
transverse direction is much larger than in the parallel direction. It
is shown that this behaviour is due to hindered rolling of the tube,
and a frictional dissipation that is negligible for a tip sliding along
the axis.
Abstract: http://links.ealert.nature.com/ctt?kn=49&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=93&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
LINKING CATALYST COMPOSITION TO CHIRALITY DISTRIBUTIONS OF AS-GROWN
SINGLE-WALLED CARBON NANOTUBES BY TUNING NixFe1-x NANOPARTICLES pp882 - 886
Wei-Hung Chiang and R. Mohan Sankaran
doi:10.1038/nmat2531
Although much effort has been directed towards the separation of
single-walled carbon nanotube mixtures, chiral-selective growth is
required for scalable production and applications. The chiral distribution
of carbon nanotubes can now be altered by varying the composition of
nickel-iron nanocatalysts.
Abstract: http://links.ealert.nature.com/ctt?kn=33&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=13&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
MgZnCa GLASSES WITHOUT CLINICALLY OBSERVABLE HYDROGEN EVOLUTION FOR
BIODEGRADABLE IMPLANTS pp887 - 891
Bruno Zberg, Peter J. Uggowitzer and Jorg F. Loffler
doi:10.1038/nmat2542
The mechanical properties and corrosion behaviour of glassy metals are
attractive for biodegradable implants. Magnesium-based glasses are
particularly promising but they suffer from hydrogen evolution during
corrosion. A distinct reduction in hydrogen evolution is now observed
in zinc-rich magnesium glasses showing good tissue compatibility.
Abstract: http://links.ealert.nature.com/ctt?kn=31&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=99&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
----------------------
ARTICLES
----------------------
ENHANCED ORDERING TEMPERATURES IN ANTIFERROMAGNETIC MANGANITE SUPERLATTICES
pp892 - 897
S. J. May et al.
doi:10.1038/nmat2557
One of the attractions in studying oxide heterostructures is the unusual
physical phenomena that they enable. It is now demonstrated that the
enforced cation ordering in thin oxide superlattices leads to
significantly enhanced magnetic ordering temperatures.
Abstract: http://links.ealert.nature.com/ctt?kn=32&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=17&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
SOLUTION-DEPOSITED SODIUM BETA-ALUMINA GATE DIELECTRICS FOR LOW-VOLTAGE
AND TRANSPARENT FIELD-EFFECT TRANSISTORS pp898 - 903
Bhola N. Pal, Bal Mukund Dhar, Kevin C. See and Howard E. Katz
doi:10.1038/nmat2560
Sodium beta-alumina (SBA) compositions are well known as ionic conductors.
Nevertheless, ionic and electron conductivities perpendicular to the
lattice planes in the material are very low. It is now shown that by
exploiting this property, SBAs can be used as transistor gate dielectrics
in solution-processed devices using oxide-based and polymer electrodes.
Abstract: http://links.ealert.nature.com/ctt?kn=40&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=84&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
ON THE ORIGIN OF THE OPEN-CIRCUIT VOLTAGE OF POLYMER-FULLERENE SOLAR
CELLS pp904 - 909
Koen Vandewal et al.
doi:10.1038/nmat2548
The efficiency of solar cells depends not only on the generated current,
but also the photovoltage produced. Ground-state charge-transfer
complexes are shown to have an important role in influencing the
open-circuit voltage of several polymer-fullerene solar-cell blends;
future chemical tuning of the polymers could maximize the complexes'
role in affecting the voltage for increased power-conversion efficiency.
Abstract: http://links.ealert.nature.com/ctt?kn=39&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=43&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
NON-ENTROPIC AND REVERSIBLE LONG-RANGE DEFORMATION OF AN ENCAPSULATING
BIOELASTOMER pp910 - 916
Ali Miserez, S. Scott Wasko, Christine F. Carpenter and J. Herbert Waite
doi:10.1038/nmat2547
Bioelastomers generally show elasticity similar to that of rubber, which
originates from entropic forces linked to deformation. It is now shown
that in the egg capsule of a large marine shell, the elasticity is
instead based on a structural transition. The results could have a
significant impact on engineering protective encapsulating systems
inspired by natural elastomers.
Abstract: http://links.ealert.nature.com/ctt?kn=38&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=55&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
=========================== ADVERTISEMENT ===========================
Natureevents Directory 2010
Want to inform a potential one million scientists about your scientific
events, courses and conferences?
Natureevents Directory 2010 is now in its 11th year.
Click here to find out how to be included.
http://links.ealert.nature.com/ctt?kn=63&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
=====================================================================
You have been sent this Table of Contents Alert because you have opted
in to receive it. You can change or discontinue your e-mail alerts at
any time, by modifying your preferences on your nature.com account at:
http://links.ealert.nature.com/ctt?kn=36&m=34306286&r=MTc2NDk2MzQxMQS2&b=2&j=NTk4NTM3MDYS1&mt=1&rt=0
(You will need to log in to be recognised as a nature.com registrant).
For further technical assistance, please contact our registration
department:
registration@nature.com
For print subscription enquiries, please contact our subscription
department:
subscriptions@nature.com
For other enquiries, please contact our customer feedback department:
feedback@nature.com
Nature Publishing Group | 75 Varick Street, 9th Floor | New York |
NY 10013-1917 | USA
Nature Publishing Group's worldwide offices:
London - Paris - Munich - New Delhi - Tokyo - Melbourne -
San Diego - San Francisco - Washington - New York - Boston
(c) Copyright 2009 Nature Publishing Group
=====================================================================
