April 2009 Volume 8 Number 4, pp 243 - 359
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EDITORIAL
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LESSONS IN SCIENCE EDUCATION p243
Strong science education is an important part of any modern education.
To ensure scientific progress, however, students need to aspire to
academic careers.
doi:10.1038/nmat2409
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COMMENTARY
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HANDS-ON INSPIRATION FOR SCIENCE pp245 - 247
To counter the decreasing interest in scientific studies, the PhysiScope
at the University of Geneva conveys scientific excitement to teenagers
by offering an entertaining and practical way to discover physics.
Christoph Renner
doi:10.1038/nmat2410
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RESEARCH HIGHLIGHTS
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OUR CHOICE FROM THE RECENT LITERATURE p248
doi:10.1038/nmat2411
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NEWS AND VIEWS
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NANOPARTICLE ASSEMBLY: ANISOTROPY UNNECESSARY pp249 - 250
Anisotropic assembly of isotropic nanoparticles is observed in a polymer
nanocomposite system and leads to considerable improvements in mechanical
properties. The relatively simple sample preparation process means the
approach could be used for large-scale manufacture of nanocomposites.
Christopher Y. Li
doi:10.1038/nmat2416
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MATERIAL WITNESS: NATURAL WATERPROOFING p250
Philip Ball
doi:10.1038/nmat2412
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COMPLEX OXIDES: A TALE OF TWO ENEMIES pp251 - 252
A large modulation of magnetic moments in superconductor/ferromagnet
superlattices raises intriguing questions about the interaction between
these competing states.
Hidenori Takagai
doi:10.1038/nmat2414
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NANOMEDICINE: VENI, VIDI, VICI AND THEN... VANISHED pp252 - 253
Non-toxicity in multifunctional inorganic nanoparticles is rare. However,
with careful engineering of silicon-based nanoparticles they can be used
in vivo as imaging and drug-delivery agents and later degraded and
cleared without toxic effects.
Victor S.-Y. Lin
doi:10.1038/nmat2413
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SUPERCONDUCTIVITY: COMMONALITIES IN PHASE AND MODE pp253 - 255
Muon and neutron experiments on the new FeAs-based superconductors reveal
phase diagrams and spin excitation modes with striking similarities to
a wide range of other unconventional superconductors.
Yasutomo J. Uemura
doi:10.1038/nmat2415
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ERRATUM
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A WAY FORWARD ALONG DOMAIN WALLS p255
Helene Bea and Patrycja Paruch
doi:10.1038/nmat2417
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EDITORIAL
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Insight: Electron and X-ray Microscopy
ELECTRON AND X-RAY MICROSCOPY p259
Fabio Pulizzi
doi:10.1038/nmat2424
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COMMENTARY
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Insight: Electron and X-ray Microscopy
IS SCIENCE PREPARED FOR ATOMIC-RESOLUTION ELECTRON MICROSCOPY?
pp260 - 262
Knut W. Urban
doi:10.1038/nmat2407
Abstract: http://links.ealert.nature.com/ctt?kn=93&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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REVIEWS
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Insight: Electron and X-ray Microscopy
STRUCTURE AND BONDING AT THE ATOMIC SCALE BY SCANNING TRANSMISSION
ELECTRON MICROSCOPY pp263 - 270
David A. Muller
doi:10.1038/nmat2380
Abstract: http://links.ealert.nature.com/ctt?kn=86&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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Insight: Electron and X-ray Microscopy
ELECTRON TOMOGRAPHY AND HOLOGRAPHY IN MATERIALS SCIENCE pp271 - 280
Paul A. Midgley and Rafal E. Dunin-Borkowski
doi:10.1038/nmat2406
Abstract: http://links.ealert.nature.com/ctt?kn=46&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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Insight: Electron and X-ray Microscopy
Near-edge X-ray absorption fine-structure microscopy of organic and
magnetic materials pp281 - 290
Harald Ade and Herman Stoll
doi:10.1038/nmat2399
Abstract: http://links.ealert.nature.com/ctt?kn=68&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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Insight: Electron and X-ray Microscopy
COHERENT X-RAY DIFFRACTION IMAGING OF STRAIN AT THE NANOSCALE
pp291 - 298
Ian Robinson and Ross Harder
doi:10.1038/nmat2400
Abstract: http://links.ealert.nature.com/ctt?kn=90&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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COMMENTARY
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Insight: Electron and X-ray Microscopy
X-RAY IMAGING BEYOND THE LIMITS pp299 - 301
Henry N. Chapman
doi:10.1038/nmat2402
Abstract: http://links.ealert.nature.com/ctt?kn=131&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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LETTERS
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THE ELECTRONIC PHASE DIAGRAM OF THE LaO1-xFxFeAs SUPERCONDUCTOR
pp305 - 309
In non-conventional superconductors, it is usually found that
superconductivity emerges in the vicinity of a critical point where
antiferromagnetic order gradually disappears-corresponding to a
second-order transition. Investigation of the newly discovered iron
pnictide superconductors challenges this picture, showing an abrupt,
first-order transition.
H. Luetkens et al.
doi:10.1038/nmat2397
Abstract: http://links.ealert.nature.com/ctt?kn=123&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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COEXISTENCE OF STATIC MAGNETISM AND SUPERCONDUCTIVITY IN SmFeAsO1-xFx
AS REVEALED BY MUON SPIN ROTATION pp310 - 314
In non-conventional superconductors, the competition of magnetic order and
superconductivity seems to be a key element for the origin of
superconductivity. Investigation of the newly discovered iron-pnictides
superconductors challenges this picture, showing a coexistence of
superconductivity and magnetism.
A. J. Drew et al.
doi:10.1038/nmat2396
Abstract: http://links.ealert.nature.com/ctt?kn=1&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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GIANT SUPERCONDUCTIVITY-INDUCED MODULATION OF THE FERROMAGNETIC
MAGNETIZATION IN A CUPRATE-MANGANITE SUPERLATTICE pp315 - 319
Oxide heterostructures offer new functionality based on the interaction
of order parameters across the heterostructure interfaces. In particular,
it is now demonstrated that superconducting layers can induce giant
modulations of magnetization in adjacent ferromagnetic layers.
J. Hoppler et al.
doi:10.1038/nmat2383
Abstract: http://links.ealert.nature.com/ctt?kn=24&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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HIGH-ENERGY CATHODE MATERIAL FOR LONG-LIFE AND SAFE LITHIUM BATTERIES
pp320 - 324
Layered lithium nickel-rich oxides are attractive as cathodes for
rechargeable lithium batteries. A concentration-gradient material based
on manganese nickel cobalt oxide showing high capacity and thermal
stability could prove advantageous for batteries used in plug-in hybrid
electric vehicles.
Yang-Kook Sun et al.
doi:10.1038/nmat2418
Abstract: http://links.ealert.nature.com/ctt?kn=31&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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TERNARY Pt/Rh/SnO2 ELECTROCATALYSTS FOR OXIDIZING ETHANOL TO CO2
pp325 - 330
The development of a direct ethanol fuel cell has been hampered by
ethanol's inefficient and slow oxidation. A ternary electrocatalyst
consisting of platinum and rhodium deposited on carbon-supported tin
dioxide nanoparticles is now shown to oxidize ethanol to carbon dioxide
with high efficiency by splitting C-C bonds at room temperature.
A. Kowal et al.
doi:10.1038/nmat2359
Abstract: http://links.ealert.nature.com/ctt?kn=67&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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BIODEGRADABLE LUMINESCENT POROUS SILICON NANOPARTICLES FOR IN VIVO
APPLICATIONS pp331 - 336
Nanomaterials that can circulate in the body hold great potential to
diagnose and treat disease, but suffer from problems such as toxicity.
Porous silicon nanoparticles have now been engineered to concomitantly
image tumours or organs within the body, deliver therapeutics and resorb
in vivo into benign components that clear renally.
Ji-Ho Park et al.
doi:10.1038/nmat2398
Abstract: http://links.ealert.nature.com/ctt?kn=111&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=39&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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ARTICLES
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HIDDEN ORDER IN URu2Si2 ORIGINATES FROM FERMI SURFACE GAPPING INDUCED BY
DYNAMIC SYMMETRY BREAKING pp337 - 341
What drives a phase transition in the heavy-fermion compound URu2Si2 is
one of the major unsolved problems in condensed-matter physics. Numerical
calculations now demonstrate how antiferromagnetic ordering leads to a
symmetry breaking that alters the material's band structure and therefore
its electronic properties.
S. Elgazzar et al.
doi:10.1038/nmat2395
Abstract: http://links.ealert.nature.com/ctt?kn=5&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=157&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
FERROELECTRICITY AND POLARITY CONTROL IN SOLID-STATE FLIP-FLOP
SUPRAMOLECULAR ROTATORS pp342 - 347
Molecular rotors have seen considerable interest as functional molecules
on surfaces or for applications as memory devices. However, it is now
shown that molecular rotation may also be used to induce ferroelectricity
in a molecule.
Tomoyuki Akutagawa et al.
doi:10.1038/nmat2377
Abstract: http://links.ealert.nature.com/ctt?kn=134&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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CLONING POLYMER SINGLE CRYSTALS THROUGH SELF-SEEDING pp348 - 353
Polymer crystals have a range of melting temperatures, therefore
simultaneous melting and crystallization can take place. New crystals are
seeded from some of the initial crystalline material, and as the
orientation of the second-generation material is correlated with the
starting crystal, orientated arrays of polymer crystals are produced.
Jianjun Xu et al.
doi:10.1038/nmat2405
Abstract: http://links.ealert.nature.com/ctt?kn=87&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
Article: http://links.ealert.nature.com/ctt?kn=51&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
ANISOTROPIC SELF-ASSEMBLY OF SPHERICAL POLYMER-GRAFTED NANOPARTICLES
pp354 - 359
Anisotropic superstructures produced by the self-assembly of spherical
nanoparticles are realized. Uniformly grafting polymer chains onto
inorganic spherical nanoparticles produces particles with amphiphile-like
behaviour. Mixing these with monodisperse polymer facilitates the
self-assembly of numerous anisotropic nanocomposites.
Pinar Akcora et al.
doi:10.1038/nmat2404
Abstract: http://links.ealert.nature.com/ctt?kn=137&m=32177797&r=MTc2NDk2MzQxMQS2&b=2&j=NDY4Mzg4NzkS1&mt=1&rt=0
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ERRATUM
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HIGHLY CONDUCTIVE [SIM]40-NM-LONG MOLECULAR WIRES ASSEMBLED BY STEPWISE
INCORPORATION OF METAL CENTRES p359
Nunzio Tuccitto et al.
doi:10.1038/nmat2401
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