May 2008 Volume 7 Number 5, pp 341 - 417
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EDITORIAL
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CLEANING UP WATER p341
The provision of clean water for a growing global population offers
many challenges and opportunities for materials research.
doi:10.1038/nmat2178
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSV0Eq
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COMMENTARY
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THE RACE FOR NEW RADIATION MONITORS pp343 - 345
New dosimeters are needed to measure radiation up to extreme levels
created by particle accelerators and nuclear fusion reactors. The
time to develop these dosimeters is now.
B. Camanzi and A. G. Holmes-Siedle
doi:10.1038/nmat2159
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSW0Er
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RESEARCH HIGHLIGHTS
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EXPLOSIVE STORIES p346
doi:10.1038/nmat2177
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSX0Es
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NEWS AND VIEWS
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BIOMIMETIC MATERIALS: MARINE INSPIRATION pp347 - 348
Sea cucumber skin is the architectural basis for polymer
nanocomposites that can adapt their mechanical properties in response
to biomedically relevant chemical stimuli, in a similar fashion to
the animals' self-defence mechanism.
Ravi V. Bellamkonda
doi:10.1038/nmat2176
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSY0Et
MATERIAL MECHANICS: AN ANGLE ON STICKY FILMS pp348 - 349
The interplay of various mechanical forces leads to characteristic
shapes of torn adhesive films. Analysis of these shapes provides
potential for new approaches to material characterization.
Jan Groenewold
doi:10.1038/nmat2175
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSZ0Eu
MATERIAL WITNESS: SHROUDED IN MYSTERY p349
Philip Ball
doi:10.1038/nmat2170
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSa0E2
FULLERIDES: SUPERCONDUCTIVITY AT THE LIMIT pp350 - 351
The successful synthesis of highly crystalline Cs3C60, exhibiting
superconductivity up to a record temperature for fullerides of 38 K,
demonstrates a powerful synthetic route for investigating the origin
of superconductivity in this class of materials.
Thomas T. M. Palstra
doi:10.1038/nmat2173
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSb0E3
INFORMATION STORAGE: AROUND THE PHASE-CHANGE CYCLE pp351 - 353
The systematic development of phase-change materials has been
hampered by experimental and computational difficulties. The first
successful modelling of the full phase-change cycle therefore closes
an important gap.
Alexander V. Kolobov
doi:10.1038/nmat2171
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSc0E4
MAIN GROUP OXIDES: MAKING THE TRANSITION pp353 - 354
A chemically driven process turns the classic insulator, gallium
oxide, into a metal by the formation of a heterogeneous mixture of
crystalline and amorphous regions.
Shu Yamaguchi
doi:10.1038/nmat2172
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSd0E5
POLYMER SEMICONDUCTORS: A FAST MOVER WITH A BRIGHT SPARK pp354 - 355
The combination of high-mobility charge transport and efficient
luminescence in one material has so far proved elusive in
semiconducting polymers. Varying the side groups on a single polymer
can improve both properties simultaneously.
Samson A. Jenekhe
doi:10.1038/nmat2174
http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSe0E6
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REVIEW
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ORGANIC FERROELECTRICS pp357 - 366
Sachio Horiuchi and Yoshinori Tokura
doi:10.1038/nmat2137
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSf0E7
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSg0E8
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LETTERS
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BULK SUPERCONDUCTIVITY AT 38 K IN A MOLECULAR SYSTEM pp367 - 371
C60-based solids are the archetypal molecular superconductors,
reaching transition temperatures as high as 33 K. Now, Cs3C60 solids,
having a transition temperature of 38 K, have been isolated. Both
face-centred-cubic and body-centred-cubic phases were synthesized,
and, uniquely among C60 solids, the superconducting phase was found
to be body-centred cubic.
Alexey Y. Ganin et al.
doi:10.1038/nmat2179
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSh0EA
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSi0EB
LEDGE-FLOW-CONTROLLED CATALYST INTERFACE DYNAMICS DURING Si NANOWIRE
GROWTH pp372 - 375
Despite the demonstration that nanowires can grow below the eutectic
point, a clear understanding of how this happens has not been
reached. Video-rate transmission electron microscopy brings new
insight into the issue, showing in real time the growth of silicon
nanowires with palladium catalysts.
Stephan Hofmann et al.
doi:10.1038/nmat2140
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSj0EC
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSk0ED
SIMULTANEOUS OPTIMIZATION OF CHARGE-CARRIER MOBILITY AND OPTICAL GAIN
IN SEMICONDUCTING POLYMER FILMS pp376 - 380
Efficient light emission combined with high charge-carrier mobility
has proven elusive for polymer semiconductors, because high mobility
is typically achieved using approaches that quench luminescence. A
new strategy, introducing a limited number of more-effective hopping
sites between otherwise relatively isolated polymer chains, achieves
this aim.
Boon Kar Yap et al.
doi:10.1038/nmat2165
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSl0EE
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSm0EF
A ZEOLITE FAMILY WITH CHIRAL AND ACHIRAL STRUCTURES BUILT FROM THE
SAME BUILDING LAYER pp381 - 385
Microporous materials such as zeolites are widely used in separation
and catalytic applications. A thermally stable family of zeolites
with chiral and achiral structures built from the same layer is now
reported.
Liqiu Tang et al.
doi:10.1038/nmat2169
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSn0EG
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSo0EH
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ARTICLES
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TEARING AS A TEST FOR MECHANICAL CHARACTERIZATION OF THIN ADHESIVE
FILMS pp386 - 390
We're all familiar with the annoying problem of trying to peel sticky
tape from a surface, only for the detached piece to narrow into a
point and break off. Surprisingly, this phenomenon can be put to good
use in deriving the mechanical parameters of a wide variety of thin,
adhesive films.
Eugenio Hamm et al.
doi:10.1038/nmat2161
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSp0EI
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSq0EJ
A CHEMICALLY DRIVEN INSULATOR-METAL TRANSITION IN NON-STOICHIOMETRIC
AND AMORPHOUS GALLIUM OXIDE pp391 - 398
Inducing and understanding insulator-metal transitions in binary
oxide can be challenging. A transition driven chemically by an
internal redox reaction is now observed in a non-stoichiometric,
amorphous gallium oxide.
Lakshmi Nagarajan et al.
doi:10.1038/nmat2164
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSr0EK
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSs0EL
MICROSCOPIC ORIGIN OF THE FAST CRYSTALLIZATION ABILITY OF Ge-Sb-Te
PHASE-CHANGE MEMORY MATERIALS pp399 - 405
Phase-change materials are of commercial interest for their use in
rewritable optical disks and as non-volatile memories, although
little is known about the dynamics of the phase transition. The
numerical simulation of the entire write-erase cycle therefore
provides important clues towards the development of new phase-change
materials.
J. Hegedus and S. R. Elliott
doi:10.1038/nmat2157
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSt0EM
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSu0EN
EPITAXIAL GRAPHENE ON RUTHENIUM pp406 - 411
The large-scale production of high-quality graphene layers is one of
the main challenges to be overcome for successful application of this
material. Epitaxial growth on ruthenium substrate produces
homogeneous domains of single- and double-layer graphene on the scale
of several tens of micrometres. The electronic properties of the
second layer show great potential for applications.
Peter W. Sutter, Jan-Ingo Flege and Eli A. Sutter
doi:10.1038/nmat2166
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSv0EO
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSw0EP
A SENSITIVITY-ENHANCED FIELD-EFFECT CHIRAL SENSOR pp412 - 417
Chiral detection using organic sensors has been limited to
concentration levels of parts-per-thousand. The use of a thin-film
transistor and of semiconducting oligomers with chiral side arms
improves differential detection of enantiomers to parts per million.
doi:10.1038/nmat2167
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSx0EQ
Article: http://ealerts.nature.com/cgi-bin24/DM/y/ekT20Xztnp0HjS0BtSy0ER
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