June 2008 Volume 7 Number 6, pp 419 - 509
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EDITORIAL
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NO JOB TOO SMALL p419
The collective approach to science at the nanoscale.
doi:10.1038/nmat2195
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COMMENTARY
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WHAT DIFFRACTION LIMIT? pp420 - 422
Several approaches are capable of beating the classical
'diffraction limit'. In the optical domain, not only are superlenses
a promising choice: concepts such as super-oscillations could provide
feasible alternatives.
Nikolay I. Zheludev
doi:10.1038/nmat2163
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RESEARCH HIGHLIGHTS
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MEMRISTORS, MOTORS AND PRINTER PROBLEMS p423
doi:10.1038/nmat2194
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NEWS AND VIEWS
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MULTIFERROICS: TOWARDS A MAGNETOELECTRIC MEMORY pp425 - 426
The room-temperature manipulation of magnetization by an electric
field using the multiferroic BiFeO3 represents an essential step
towards the magnetoelectric control of spintronics devices.
Manuel Bibes and Agnes Barthelemy
doi:10.1038/nmat2189
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COMPUTATIONAL MATERIALS SCIENCE: OUT OF THE SCALAR SAND BOX
pp426 - 427
With the extension of a popular computational method to its tensorial
analogue, structural configurations that optimize anisotropic
physical quantities can now be predicted.
Gus L. W. Hart
doi:10.1038/nmat2190
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CONJUGATED POLYMERS: WHAT MAKES A CHROMOPHORE? pp427 - 428
The spectral complexity shown by conjugated polymers has been
explained by interactions between chromophores in tangled chains, but
experiments on model oligomers reveal that it may arise from the
chromophores themselves.
Benjamin J. Schwartz
doi:10.1038/nmat2191
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ELECTROCHEMISTRY: ELECTRONS CREATE A REACTION pp429 - 430
In an identification parade of chemical reactions using a
single-electrode system, the charges generated by the mechanical
rubbing of insulators are shown to be electrons rather than ions.
Toribio F. Otero
doi:10.1038/nmat2188
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MATERIAL WITNESS: QUANTUM WRIT LARGE p430
Philip Ball
doi:10.1038/nmat2187
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MOLECULAR MACHINES: NANOSCALE GADGETS pp431 - 432
Meeting their biological counterparts halfway, artificial molecular
machines embedded in liquid crystals, crystalline solids and
mesoporous materials are poised to meet the demands of the next
generation of functional materials.
Miguel A. Garcia-Garibay
doi:10.1038/nmat2192
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OBITUARY: DANIEL CHEMLA (1940-2008) p433
Physicist, karate master, and pioneer in optical properties of
nanostructures
Charles Shank, Shimon Weiss and Joseph Zyss
doi:10.1038/nmat2193
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PROGRESS ARTICLE
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SUPERLENSES TO OVERCOME THE DIFFRACTION LIMIT pp435 - 441
Xiang Zhang and Zhaowei Liu
doi:10.1038/nmat2141
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUP0Ex
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUQ0Ey
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REVIEW
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BIOSENSING WITH PLASMONIC NANOSENSORS pp442 - 453
Jeffrey N. Anker et al.
doi:10.1038/nmat2162
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUR0Ez
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUS0E1
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LETTERS
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A COMPLETE REPRESENTATION OF STRUCTURE-PROPERTY RELATIONSHIPS IN
CRYSTALS pp455 - 458
Cluster expansion has been a particularly successful computational
method that has allowed the identification of the relationship between
lattice configurations and scalar properties in crystals. A tensorial
version of the method that will enable prediction of tensor-valued
properties is now introduced. It is validated by predicting
anisotropic properties relevant to semiconductor optoelectronic
devices.
A. van de Walle
doi:10.1038/nmat2200
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUT0E2
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUU0E3
HIGH-FREQUENCY MICROMECHANICAL RESONATORS FROM ALUMINIUM-CARBON
NANOTUBE NANOLAMINATES pp459 - 463
Composites with added carbon nanotubes are known for their improved
mechanical strength. Laminates of thin films of aluminium and carbon
nanotubes are now used for the fabrication of micromechanical resonators
with significantly enhanced mechanical properties.
Jung Hoon Bak et al.
doi:10.1038/nmat2181
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUV0E4
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUW0E5
NON-VOLATILE FERROELECTRIC CONTROL OF FERROMAGNETISM IN (Ga,Mn)As
pp464 - 467
Diluted magnetic semiconductor devices where magnetism can be
controlled by an electric field are of significant interest for
applications, as they combine the appealing properties of
multiferroics with existing semiconductor technology. By using a
ferroelectric polymer as the gate of a transistor device, non-volatile
electric control over the magnetism of (Ga,Mn)As has now been achieved.
I. Stolichnov et al.
doi:10.1038/nmat2185
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUX0E6
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUY0E7
PROBING THE STRUCTURE OF HETEROGENEOUS DILUTED MATERIALS BY
DIFFRACTION TOMOGRAPHY pp468 - 472
X-ray diffraction computed tomography can provide high-resolution
phase mapping of nanocrystalline and powdered crystalline materials.
Moreover, a reverse analysis offers the possibility to extract, a
posteriori, the scattering/diffraction pattern from a selected area
of the tomography image.
Pierre Bleuet et al.
doi:10.1038/nmat2168
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUZ0E8
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUa0EG
DIRECT IN SITU DETERMINATION OF THE POLARIZATION DEPENDENCE OF
PHYSISORPTION ON FERROELECTRIC SURFACES pp473 - 477
The electric polarization of dipoles on the surface of a ferroelectric
material can influence the energetics of materials adsorption. The
demonstration of this effect on the physisorption kinetics of gases
such as carbon dioxide may be used to control adsorption and surface
chemistry on the nanoscale.
Dongbo Li et al.
doi:10.1038/nmat2198
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUb0EH
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUc0EI
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ARTICLES
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ELECTRIC-FIELD CONTROL OF LOCAL FERROMAGNETISM USING A MAGNETOELECTRIC
MULTIFERROIC pp478 - 482
Multiferroic materials are of interest because they allow control of
their magnetic properties through electric fields. However,
room-temperature magnetoelectrics often show antiferromagnetic order,
reducing the effects of such coupling. A novel approach demonstrates
switchable electric field control over a local magnetic field through
the indirect route of exchange bias.
Ying-Hao Chu et al.
doi:10.1038/nmat2184
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUd0EJ
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUe0EK
ELECTRONIC STRUCTURES OF INTERFACIAL STATES FORMED AT POLYMERIC
SEMICONDUCTOR HETEROJUNCTIONS pp483 - 489
Understanding how excited states behave at heterojunctions between
polymers in blends is fundamental to designing better organic solar
cells and light-emitting diodes. A quantum-mechanical molecular-scale
model of how excitations behave at heterojunctions has been developed,
showing an unexpectedly wide but specific range of excitonic states.
Ya-shih Huang et al.
doi:10.1038/nmat2182
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUf0EL
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUg0EM
OPTICAL GAIN BY A SIMPLE PHOTOISOMERIZATION PROCESS pp490 - 497
Organic holographic materials are pursued as versatile and cheap
data-storage materials. However, previously such materials either
needed the application of an external electric field or had mostly
poor efficiencies. Now, a novel recording process based on a
photoisomerization process demonstrates significantly improved writing
properties of holograms.
Francisco Gallego-Gomez, Francisco del Monte and Klaus Meerholz
doi:10.1038/nmat2186
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUh0EN
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUi0EO
INTERSTITIAL OXIDE ION CONDUCTIVITY IN THE LAYERED TETRAHEDRAL NETWORK
MELILITE STRUCTURE pp498 - 504
Fast-ion conductors are needed to reduce the operating temperature of
solid-oxide fuel cells. The identification of the conduction mechanism
in electrolytes where conduction is based on mobile oxygen
interstitials rather than the usual anion vacancies offers a generic
design principle for novel solid electrolytes.
Xiaojun Kuang et al.
doi:10.1038/nmat2201
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUj0EP
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUk0EQ
ELECTROSTATIC ELECTROCHEMISTRY AT INSULATORS pp505 - 509
The nature of electrostatic charges produced at the surface of
insulators by rubbing is the subject of a long-standing discussion.
The charges created on polytetrafluoroethylene by rubbing with
polymethylmethacrylate are identified here to be electrons rather
than ions.
Chongyang Liu and Allen J. Bard
doi:10.1038/nmat2160
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUl0ER
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekzQ0Xztnp0HjS0BvUm0ES
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