Many scientists think that carbon nanotubes may be central to miniature technologies of the future. Because nanotubes conduct current and emit electrons, they have been considered promising as wires, sensors,
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, and display elements. A new study,
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, however, throws some cold water on this optimistic scenario.
Alex Zettl and his colleagues at the University of California, Berkeley have shown that the electronic properties of nanotubes are sensitive to oxygen. In a vacuum, the electrical resistance of nanotubes is 15 percent higher than in air. The researchers report their findings in the March 10 Science,
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The recent detection of gravitational waves is a stunning confirmation of Albert Einstein’s theories and the start of a new way of observing the universe,
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. And at the center of it all is a celebrity couple: the first known pairing of black holes and the most massive ones found outside of the cores of galaxies.
On September 14,
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, the Advanced Laser Interferometer Gravitational-Wave Observatory,
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, or LIGO,
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, sensed a disturbance in spacetime caused by two massive black holes smashing together (SN Online: 2/11/16). “It’s quite an incredible discovery,
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,” says Vikram Ravi, an astrophysicist at Caltech. “They've seen objects that I guess none of us outside the collaboration imagined they might see.” With masses

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