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American Institute of Physics



February-March 2004
Volume 10, Issue 1


Time-resolved spectroscopy comes of age
It is possible to learn a lot about a sample by exciting it with a pulsed laser and using a very fast detector to measure the resulting emissions and decay as a function of time. Ultrafast lasers and pulse-shaping techniques have helped open up new applications.

Bottling the hydrogen genie
If hydrogen is to replace gasoline for road transport, a means to store useful quantities of hydrogen on-board the vehicle must be found. Storage as a liquid, as a gas, or in metal hydrides all have serious limitations.

Simplifying carbon nanotube identification
A new method has been found to identify and classify various structural forms of carbon nanotubes, each with its characteristic electronic properties, in a typical mixture, using spectrofluorimetry

Zero thermal expansion
An intermetallic, electrically conducting compound---ytterbium-gallium-germanium---exhibits near-zero thermal expansion because, when cooled, the crystal cell stretches in one direction and contracts in another, maintaining the same volume.


Briefs: Opening the x-ray water window; Zero thermal expansion; Magnetoresistor computing; A pressure-driven battery


Societies: APS works for the physics community



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