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It
looks like nanotechnology researchers have
gained a key tool in the form of layered wires
one thousand times narrower than a human hair.
Each layer of a wire can be a different semiconductor
or insulator, which are the basic ingredients
of modern electronic devices. This means a
single layered wire can form a transistor,
which is the building block of computer chips.
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Webs
within Web boost searches
If you look at the Web as a series of thousands
of mini, interconnected, subject-specific Webs,
the picture of a comprehensive search engine comes
into focus. A mathematical model that maps out these
subject Webs could help you find what you're looking
for.
Circuit
gets more power from shakes
Self-powering watches are just the beginning of
energy-scavenging technology. A circuit that squeezes
four times more power from crystals that convert
vibration to electricity could hasten the development
of sensors, wireless networks and other devices
powered by the motion of vehicles, and even people.
Method
measures quantum quirk
The weird quantum property of entanglement, which
links two or more atoms or subatomic particles regardless
of how far apart they are, is a crucial ingredient
for making mind-numbingly fast quantum computers
and perfectly secure quantum communications. Entanglement
defies common sense, and has until now defied direct
measurement. A new method could put a virtual yardstick
to this odd phenomenon.
Biochip
sprouts DNA strands
Precisely positioning DNA strands on chips could
speed medical and biological tests, and provide
a useful building technique for nanotechnology.
A scheme that turns gold surfaces into microscopic
Chia pets shows promise. The method makes molecular-scale
forests of DNA as narrow as the width of 100 hydrogen
atoms.
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