July 2008 Volume 7 Number 7, pp 511 - 595
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EDITORIAL
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A FUNDAMENTAL PROBLEM p511
Some materials scientists think that the United Kingdom's decision to
cut funding for 'big physics' is benefiting them. Here's why it isn't.
doi:10.1038/nmat2218
http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByDq0ES
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COMMENTARY
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PRINT AND PERISH? pp512 - 514
Although the Internet has fundamentally changed the way we
communicate, science publishing is remarkably hesitant in making full
use of the potential offered by new technology.
Joerg Heber
doi:10.1038/nmat2215
http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByDr0ET
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INTERVIEW
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A REVIEW OF PHYSICAL REVIEW pp515 - 516
The American Physical Society is the largest publisher in physics.
Nature Materials talks to Gene Sprouse, Editor-in-Chief of APS
publications.
doi:10.1038/nmat2216
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RESEARCH HIGHLIGHTS
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LOOKING, SEEING, SENSING p517
doi:10.1038/nmat2217
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NEWS AND VIEWS
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NANOBIOLOGY: PARTICLES SLIP CELL SECURITY pp519 - 520
Nanoparticles with alternating striations of hydrophobic and
hydrophilic ligands cross the cell membrane by a direct mechanism - a
route that delivers them to the main compartment of the cell while
leaving the membrane undisrupted.
Tian Xia, Leonard Rome and Andre Nel
doi:10.1038/nmat2213
http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByDu0EW
ORGANIC ELECTRONICS: WHEN TTF MET TCNQ pp520 - 521
The observation of metallic conductivity at interfaces between layers
of organic insulators opens the way to the realization of a wide
range of electronic systems that cannot be prepared in bulk organic
materials.
John R. Kirtley and Jochen Mannhart
doi:10.1038/nmat2211
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MATERIAL WITNESS: MATERIALS MATCHMAKING p522
Philip Ball
doi:10.1038/nmat2210
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POLYMERS: FACING THE FLIP SIDE pp522 - 523
A blend of ferroelectric and semiconducting polymers provides a
potential route to a memory technology compatible with low-cost
printed electronics.
J. Campbell Scott
doi:10.1038/nmat2212
http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByDx0EZ
STIMULI-RESPONSIVE POLYMERS: ENGINEERING INTERACTIONS pp523 - 525
Materials that respond to their external environment require creative
molecular design - much inspiration comes from the natural world.
Alshakim Nelson
doi:10.1038/nmat2214
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REVIEW
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THE ROLE OF INTERPARTICLE AND EXTERNAL FORCES IN NANOPARTICLE ASSEMBLY
pp527 - 538
Younjin Min et al.
doi:10.1038/nmat2206
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByD10EO
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByD20EP
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LETTERS
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CHARGE-ORDER FLUCTUATIONS IN ONE-DIMENSIONAL SILICIDES pp539 - 542
One-dimensional metals are predicted to exhibit charge-order
fluctuations and become insulators at low temperature. Experiments on
silicide nanowires grown on silicon reveal that fluctuations in the
narrowest wires determine the electronic properties, and can be
exploited in nanoelectronic devices.
Changgan Zeng et al.
doi:10.1038/nmat2209
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByD30EQ
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByD40ER
PHOTONIC METAMATERIALS BY DIRECT LASER WRITING AND SILVER CHEMICAL
VAPOUR DEPOSITION pp543 - 546
Metamaterials enable a number of intriguing photonic functionalities
from superlensing to cloaking. The demonstration of truly
three-dimensional metamaterials by a direct laser writing process
offers the possibility of complex photonic functionalities at optical
frequencies.
Michael S. Rill et al.
doi:10.1038/nmat2197
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByD50ES
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByD60ET
ORGANIC NON-VOLATILE MEMORIES FROM FERROELECTRIC PHASE-SEPARATED
BLENDS pp547 - 550
Although ferroelectric polarization is of interest for the development
of non-volatile memories, the read-out of the polarization state is
destructive. The blending of semiconducting and ferroelectric polymers
in a phase-separated network achieves non-volatile memory arrays that
can be read out non-destructively.
Kamal Asadi, Dago M. de Leeuw, Bert de Boer and Paul W. M. Blom
doi:10.1038/nmat2207
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByD70EU
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByD80EV
DETERMINING THE ALUMINIUM OCCUPANCY ON THE ACTIVE T-SITES IN ZEOLITES
USING X-RAY STANDING WAVES pp551 - 555
The occupation of specific crystallographic sites by tetrahedrally
coordinated aluminium atoms in zeolites has a strong influence on
their catalytic and separation performance. X-ray standing waves are
now used to directly and unambiguously determine the distribution and
ordering of aluminium on active sites in a microporous scolecite
system.
Jeroen A. van Bokhoven et al.
doi:10.1038/nmat2220
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEA0Ef
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEB0Eg
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ARTICLES
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DIRECT OBSERVATION OF A LOCAL STRUCTURAL MECHANISM FOR DYNAMIC ARREST
pp556 - 561
Cooled liquids that fail to reach their thermodynamic ground state
either form gels or glasses. Their formation is thought to be promoted
by stable local atomic structures. The role of these local structures
has now been verified in experiments that also show that their
structural variety is much larger than expected.
C. Patrick Royall, Stephen R. Williams, Takehiro Ohtsuka and Hajime
Tanaka
doi:10.1038/nmat2219
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByED0Ei
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEE0Ej
PHASE INSTABILITY INDUCED BY POLAR NANOREGIONS IN A RELAXOR
FERROELECTRIC SYSTEM pp562 - 566
Relaxor ferroelectrics, which show a strong dependence of electric
polarization on the applied electric field, are promising for
applications such as sensors and actuators. Neutron-scattering
experiments now establish a direct link between the unique
piezoelectric properties of relaxors and local clusters of randomly
oriented polarization specific to these materials.
Guangyong Xu, Jinsheng Wen, C. Stock and P. M. Gehring
doi:10.1038/nmat2196
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEF0Ek
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEG0El
SIDEWALL OXIDE EFFECTS ON SPIN-TORQUE- AND MAGNETIC-FIELD-INDUCED
REVERSAL CHARACTERISTICS OF THIN-FILM NANOMAGNETS pp567 - 573
Nanomagnets are very promising structures for magnetic data storage.
However, it is found that during exposure to ambient oxygen for
processing, a nanomagnet develops a sidewall oxide layer that is
detrimental for its magnetic properties. The problem can be solved by
deposition of a metal layer (aluminium) that reduces and almost
eliminates the problem.
O. Ozatay et al.
doi:10.1038/nmat2204
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEH0Em
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEI0En
METALLIC CONDUCTION AT ORGANIC CHARGE-TRANSFER INTERFACES
pp574 - 580
The electronic properties of interfaces between two different solids
can differ strikingly from those of the constituent materials, as
demonstrated by the high conductivity at the interface between
insulating perovskite oxide layers. Metallic conductivity is now
observed at the interface between organic insulators, which promises
new scientific developments for organic electronics.
Helena Alves, Anna S. Molinari, Hangxing Xie and Alberto F. Morpurgo
doi:10.1038/nmat2205
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEJ0Eo
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEK0Ep
GUIDED AND FLUIDIC SELF-ASSEMBLY OF MICROSTRUCTURES USING RAILED
MICROFLUIDIC CHANNELS pp581 - 587
Fabrication of complex two-dimensional patterns is now possible using
'rails' as a guiding mechanism for the self-assembly of
microstructures within fluidic channels. The method is efficient, and
heterogeneous systems, for example patterns of different living cells
for tissue engineering, can be made with high precision.
Su Eun Chung et al.
doi:10.1038/nmat2208
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEL0Eq
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEM0Er
SURFACE-STRUCTURE-REGULATED CELL-MEMBRANE PENETRATION BY
MONOLAYER-PROTECTED NANOPARTICLES pp588 - 595
The structural organization of surface groups on nanoparticles is
proven to be important for cell membrane penetration. Nanoparticles
coated with alternating ribbon-like arrangements of hydrophobic and
anionic ligands penetrate membranes without causing disruption. These
design rules may have implications for toxicity issues and drug
delivery applications of nanomaterials.
Ayush Verma et al.
doi:10.1038/nmat2202
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEN0Es
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ellh0Xztnp0HjS0ByEO0Et
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