of
integer and fractional quantum Hall effects. The latest observations of this

system reveal prominent structure in the high energy single particle
spectrum
that cannot be readily explained with existing models of this system.
O. E. Dial, R. C. Ashoori, L. N. Pfeiffer and K. W. West
doi:10.1038/nature08941
Abstract:
http://www.nature.com/nature/journal/v464/n7288/abs/nature08941.html
Article:
http://www.nature.com/nature/journal/v464/n7288/full/nature08941.html

Atom-by-atom structural and chemical analysis by annular dark-field electron

microscopy pp571-574
An imaging technique that could identify all the individual atoms, including

defects, in a material would be a useful tool. Here an electron-microscopy
approach to the problem, based on annular dark-field imaging, is described.
A monolayer of boron nitride was studied, and three types of atomic
substitution
were identified. Careful analysis of the data enabled the construction of a
detailed map of the atomic structure.
Ondrej L. Krivanek et al.
doi:10.1038/nature08879
Abstract:
http://www.nature.com/nature/journal/v464/n7288/abs/nature08879.html
Article:
http://www.nature.com/nature/journal/v464/n7288/full/nature08879.html

Lock and key colloids pp575-578
Many functional materials can be created by directing the assembly of
colloidal
particles into a desired structure. Control over particle assembly usually
involves the use of molecules such as DNA that can recognize and bind each
other. Here, a simple and effective alternative is described. Colloidal
spheres
serve as keys, and monodisperse colloidal particles with a spherical cavity
as
locks. These will spontaneously and reversibly bind to each other via the
depletion interaction if their sizes match.
S. Sacanna, W. T. M. Irvine, P. M. Chaikin and D. J. Pine
doi:10.1038/nature08906
Abstract:
http://www.nature.com/nature/journal/v464/n7288/abs/nature08906.html
Article:
http://www.nature.com/nature/journal/v464/n7288/full/nature08906.html

Temperature-associated increases in the global soil respiration
record pp579-582
Soil respiration (RS) is the flux of microbial- and plant-respired carbon
dioxide
from the soil surface to the atmosphere, and constitutes the second-largest
terrestrial carbon flux. It has been suggested that RS should change with
climate, but this has been difficult to confirm observationally. It is shown

here, however, that the air temperature anomaly (the deviation from the
1961-
1990 mean) correlates significantly and positively with changes in RS.
Ben Bond-Lamberty and Allison Thomson

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