October 2008 Volume 7 Number 10, pp 757 - 823
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EDITORIAL
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HEALTHY BY CHOICE p757
How can physical scientists contribute to biomedical applications and
healthcare?
doi:10.1038/nmat2278
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6DT0ER
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COMMENTARY
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NANOMATERIALS AT WORK IN BIOMEDICAL RESEARCH pp758 - 760
With some nanomaterial-based medicines having entered the marketplace,
and more on the verge of doing so, nanomedicine is expected to become
an exciting playground for chemists and material scientists.
Younan Xia
doi:10.1038/nmat2277
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6DU0ES
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INTERVIEW
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THE HEALTHY OPTION pp761 - 762
Philips has recently changed its focus from electronic components to
healthcare innovations. Nature Materials talked to Hans Hofstraat
about the reasons behind this choice and how it affected Philips
Research scientists.
doi:10.1038/nmat2276
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6DV0ET
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RESEARCH HIGHLIGHTS
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RESEARCH HIGHLIGHTS p764
doi:10.1038/nmat2279
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6DW0EU
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NEWS AND VIEWS
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THERMOELECTRICS: HALF-FULL GLASSES pp765 - 766
The low thermal conductivity of some thermoelectric materials is
commonly attributed to rattlers - atoms trapped in oversized cages.
Two independent studies now show that rattlers indeed reduce thermal
conductivity to glass-like values.
Cronin B. Vining
doi:10.1038/nmat2271
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6DX0EV
ELECTROCHROMIC DISPLAYS: THE NEW BLACK pp766 - 767
Careful design of donor-acceptor polymer molecules with reversible
redox properties gives access to polymer electrochromic displays with
switchable absorption in the full visible range of the optical
spectrum.
Frederik C. Krebs
doi:10.1038/nmat2282
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6DY0EW
STIMULI-RESPONSIVE HYDROGELS: DRUGS TAKE CONTROL pp767 - 768
Using a known and widely used drug as a specific triggering agent,
another drug can be released from a hydrogel. This route opens up the
application of hydrogels in the targeted, controlled release of drugs
in vivo.
Cameron Alexander
doi:10.1038/nmat2281
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6DZ0EX
PARTICLE TRANSPORT: SALT AND MIGRATE pp769 - 770
Adding simple salts to colloidal solutions provides a method of
controlling the migration of particles in microfluidic devices.
Dennis C. Prieve
doi:10.1038/nmat2283
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Da0Ee
OXYGEN CATALYSIS: THE OTHER HALF OF THE EQUATION pp770 - 771
Artificial photosynthesis - splitting water with light - is an
attractive way to make hydrogen, but what happens to the oxygen? A
catalyst that aids in the efficient production of gaseous oxygen
improves the viability of this approach.
John Turner
doi:10.1038/nmat2284
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Db0Ef
MATERIAL WITNESS: GET KNOTTED p772
Philip Ball
doi:10.1038/nmat2280
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dc0Eg
ENERGY: FUEL FOR THOUGHT pp772 - 774
The worlds of nanotechnology and energy meet to unveil a realm of
functional materials for fuelling the challenge of low-carbon,
sustainable energy.
Robert Schloegl
doi:10.1038/nmat2285
http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dd0Eh
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LETTERS
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HIGHLY COMPRESSED AMMONIA FORMS AN IONIC CRYSTAL pp775 - 779
Ammonia is an important compound for producing pharmaceuticals,
fertilisers and explosives. It is known to form hydrogen-bonded solids
at high pressure, but ionic solids of ammonium amide are now predicted
at even higher pressure.
Chris J. Pickard and R. J. Needs
doi:10.1038/nmat2261
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6De0Ei
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Df0Ej
ASYMMETRIC CAGING IN SOFT COLLOIDAL MIXTURES pp780 - 784
A new, asymmetric glassy state is identified in soft colloidal
mixtures composed of large and small star polymers. The results will
enable the design, control and tuning of the rheological properties
of other soft composite materials.
C. Mayer et al.
doi:10.1038/nmat2286
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dg0Ek
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dh0El
BOOSTING MIGRATION OF LARGE PARTICLES BY SOLUTE CONTRASTS
pp785 - 789
Developing novel strategies to drive or manipulate the migration of
particles in solutions is important for lab-on-a-chip technologies,
especially in the context of biological and chemical analysis. A
strongly amplified and tunable migration of large particles using a
passive transport phenomenon is now reported.
B. Abecassis et al.
doi:10.1038/nmat2254
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Di0Em
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dj0En
TWO IH-SYMMETRY-BREAKING C60 ISOMERS STABILIZED BY CHLORINATION
pp790 - 794
The structure of C60 is well-known: a perfectly symmetrical sphere
of 12 isolated pentagons. But this is only one of 1,812 possible
isomers, and the only one to obey the isolated-pentagon rule. So far
it has been the only form observed. But now two isomers without
isolated pentagons have been made.
Yuan-Zhi Tan et al.
doi:10.1038/nmat2275
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dk0Eo
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dl0Ep
THE DONOR-ACCEPTOR APPROACH ALLOWS A BLACK-TO-TRANSMISSIVE SWITCHING
POLYMERIC ELECTROCHROME pp795 - 799
Smart windows and switchable displays require electrochomic materials
that change their optical properties on electron transfer. Organic
polymers offer further benefits including high contrast, greater
colour variety and flexible substrates, but their use has remained
challenging. Now, a donor-acceptor approach has yielded the first
neutral black polymeric electrochrome.
P. M. Beaujuge, S. Ellinger and J. R. Reynolds
doi:10.1038/nmat2272
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dm0Eq
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dn0Er
DRUG-SENSING HYDROGELS FOR THE INDUCIBLE RELEASE OF BIOPHARMACEUTICALS
pp800 - 804
Stimuli-responsive hydrogels show potential as smart materials for
drug delivery, however, the triggers used must be applicable in vivo.
Now, a hydrogel has been synthesized that contains protein-protein
interactions that respond to a specific pharmaceutical drug and enable
the hydrogel to controllably release its load of a human growth
factor, which increases cell proliferation.
Martin Ehrbar et al.
doi:10.1038/nmat2250
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Do0Es
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dp0Et
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ARTICLES
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BREAKDOWN OF PHONON GLASS PARADIGM IN La- AND Ce-FILLED Fe4Sb12
SKUTTERUDITES pp805 - 810
The low thermal conductivity in filled skutterudites has been ascribed
to rattling atoms inducing a phonon glass. Experimental evidence now
shows that the phonon glass description is incorrect, and provides
essential insight for the development of microscopic models aimed at
describing the thermoelectric properties of these materials.
Michael Marek Koza et al.
doi:10.1038/nmat2260
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dq0Eu
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dr0Ev
AVOIDED CROSSING OF RATTLER MODES IN THERMOELECTRIC MATERIALS
pp811 - 815
The presence of guest atoms-known as rattlers-in the cages of some
clathrate structures is considered to be responsible for the low
thermal conductivity of the materials. Neutron spectroscopy provides
important evidence regarding the actual phonon dispersion in the
material, and the precise way in which this is influenced by rattlers.
Mogens Christensen et al.
doi:10.1038/nmat2273
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Ds0Ew
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dt0Ex
SMALL FUNCTIONAL GROUPS FOR CONTROLLED DIFFERENTIATION OF
HYDROGEL-ENCAPSULATED HUMAN MESENCHYMAL STEM CELLS pp816 - 823
Cell-matrix interactions have critical roles in regeneration,
development and disease. Encapsulated human mesenchymal stem cells
can now be induced to differentiate down osteogenic and adipogenic
pathways by controlling their three-dimensional environment using
tethered small-molecule functional groups.
Danielle S. W. Benoit, Michael P. Schwartz, Andrew R. Durney and
Kristi S. Anseth
doi:10.1038/nmat2269
Abstract: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Du0Ey
Article: http://ealerts.nature.com/cgi-bin24/DM/y/enkN0Xztnp0HjS0B6Dv0Ez
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