Programming Advanced Materials Researchers create three-dimensional structures using DNA-directed assembly.

Posted by sciencewatch on 10 Feb 2008 6:28 pm. Filed under General Science News.

Programming Advanced Materials
Researchers create three-dimensional structures using DNA-directed assembly.

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Lift-off for Columbus science labThe Atlantis shuttle launches on a

Posted by sciencewatch on 10 Feb 2008 6:21 am. Filed under General Science News.

Lift-off for Columbus science lab
The Atlantis shuttle launches on a mission to take Europe’s Columbus science lab to the space station.

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The Grid: A Journey Through the Heart of Our Electrified

Posted by sciencewatch on 9 Feb 2008 6:23 pm. Filed under General Science News.

The Grid: A Journey Through the Heart of Our Electrified World

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Three-parent embryo made in labScientists create a human embryo with

Posted by sciencewatch on 9 Feb 2008 6:23 am. Filed under General Science News.

Three-parent embryo made in lab
Scientists create a human embryo with three separate parents, raising hopes of new treatment for genetic disease.

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News: ‘The Monitor’ ep. 2 - Free Will, Death, Brains

Posted by sciencewatch on 8 Feb 2008 6:21 pm. Filed under General Science News.

News: ‘The Monitor’ ep. 2 - Free Will, Death, Brains [Video]
This week on The Monitor: Inactivity shortens telomeres (and your life), free will is a self-fulfilling prophecy, mapping the brain will take more computers than Google currently owns, and creationism gets its own journal.

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Society depends on more for lessIf the world is to

Posted by sciencewatch on 8 Feb 2008 6:26 am. Filed under General Science News.

Society depends on more for less
If the world is to end the threat from climate change, we need to be able to produce more with less energy.

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US judge reinstates sonar curbsA US judge reimposes curbs on

Posted by sciencewatch on 7 Feb 2008 6:17 pm. Filed under General Science News.

US judge reinstates sonar curbs
A US judge reimposes curbs on sonar which aim to protect whales, overturning a waiver by President Bush.

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News: Are Americans Afraid of the Outdoors? Americans have been

Posted by sciencewatch on 7 Feb 2008 6:15 am. Filed under General Science News.

News: Are Americans Afraid of the Outdoors?
Americans have been visiting national parks and other natural reserves less and less since 1987, new research confirms. Outdoor pursuits, ranging from camping to hunting, have entered a persistent and growing decline.

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Semiconductor industry switches to hafnium-based transistors Plagued by quantum tunneling

Posted by sciencewatch on 6 Feb 2008 6:18 pm. Filed under General Science News.

Semiconductor industry switches to hafnium-based transistors
Plagued by quantum tunneling of charge carriers through gate insulators, chip manufacturers are shifting to high-dielectric-constant materials that maintain sufficient capacitance and reduce power leaks.

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NOVA scienceNOW: Ask The Expert: AgingLeonard Guarente answered selected viewer

Posted by sciencewatch on 6 Feb 2008 6:18 am. Filed under General Science News.

NOVA scienceNOW: Ask The Expert: Aging
Leonard Guarente answered selected viewer questions about the latest research on aging and living healthier, potentially longer lives on January 16, 2007.
NOVA

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Science Policy News


&bull Statement Calls for Robust Support of Defense S&T Program

Nanotechnology News


&bull NSTI Nanotech 2008 Expands Special Nano Industrial Impact Tutorials and Works...
Nanotechnology Experts to Teach State-of-Art at Nanotech 2008 in Boston

&bull Nanotechnology in Italy is Shifting into High Gear
For centuries, Italy has well served its reputation as a center of cultural and scientific innovation. From its role as the cradle of the Renaissance – when the region produced some of the most enlightened scientific thinking in human history – to its current-day fame for producing some of the highest-performing automobiles in the world, Italy has always had a solid place among technology leaders. Now, with an integrated approach and a serious commitment of public investment, Italy has applied a characteristic sense of purpose and flair for innovation to its growing nanotechnology R&D effort.

&bull Venture Profile: Veratag
Veratag exploits the natural production variation of MEMS resonators to create unique electronic identifiers that are unclonable, both in terms of physical structure and output signals. These micro-resonator structures are used to provide secure identification and authentication that cannot be rivaled using encryption techniques.

&bull Venture Profile: SunFlake A/S
SunFlake's nano flakes have the potential to convert up to 30 per cent of the solar energy into electricity. Each flake has a perfect crystalline structure and the flakes in combination have a structure that absorbs all light.

Physics News


&bull Static tuning band gaps of three-dimensional photonic crystals in subterahert...
Weiwu Chen, Soshu Kirihara, and Yoshinari Miyamoto
Microscale three-dimensional photonic crystals with different dielectric volume fractions (beta) were fabricated to tune the band gaps in the subterahertz frequency range. When changed beta from 33% to 20% in the SiOAlO ceramic-resin photonic crystals with a lattice constant of 500 [mu]m, the measu ... [Appl. Phys. Lett. 92, 183504 (2008)] published Fri May 9, 2008.

&bull Silicon-germanium interdiffusion in high-germanium-content epitaxial heterost...
Nevran Ozguven and Paul C. McIntyre
We report on multilayer x-ray reflectivity measurements of the SiGe interdiffusivity in epitaxial SiGe/SiGe superlattices that have an average Ge composition of 91 at. %. The extracted activation enthalpy (3.200.2 eV) is substantially smaller than that previously reported for Si-rich SiGe alloys ... [Appl. Phys. Lett. 92, 181907 (2008)] published Fri May 9, 2008.

&bull Giant carrier mobility in single crystals of FeSb[sub 2]
Rongwei Hu, V. F. Mitrovic, and C. Petrovic
We report the giant carrier mobility in single crystals of FeSb. Nonlinear field dependence of Hall resistivity is well described with the two-carrier model. Maximum mobility values in high mobility band reach ~10 cm/V s at 8 K and are ~10 cm/V s at the room temperature. Our results point to a ... [Appl. Phys. Lett. 92, 182108 (2008)] published Fri May 9, 2008.

&bull DX centers in CdTe: A density functional study
Mao-Hua Du
DX centers induced by both group-III and group-VII donors in CdTe are studied using density functional calculations. The results show that, for group-VII donors, the DX centers with a cation-cation bond (alpha- and beta-CCB-DX centers) are more stable than the previously proposed broken-bond DX (BB- ... [Appl. Phys. Lett. 92, 181908 (2008)] published Fri May 9, 2008.

&bull Photoinduced electron transfer in C[sub 60] encapsulated single-walled carbon...
Y. F. Li, T. Kaneko, and R. Hatakeyama
The transport properties of field-effect transistors based on C fullerene peapods have been investigated and our findings indicate that the transport characteristics of single-walled carbon nanotubes (SWNTs) are highly sensitive to the encapsulated fullerenes due to the charge-transfer effect. Under ... [Appl. Phys. Lett. 92, 183115 (2008)] published Fri May 9, 2008.