News
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TechNanotubes signal when engine oil needs changing
A new, easy-to-fabricate sensor made from carbon nanotubes detects when automobile-engine oil needs replacement.
By Peter Weiss -
TechHydrogen hopes in carbon shells
Lithium atoms added to buckyball surfaces bestow on these molecules a remarkable capacity to store hydrogen.
By Peter Weiss -
EarthAir conditioning could heat the world
Global warming predicted for the coming decades may decrease winter heating bills in some parts of the United States, but producing the extra electricity needed for summertime air conditioning will create increased emissions of planet-warming carbon dioxide.
By Sid Perkins -
PhysicsOn-chip lamp scores a bull’s-eye
Etching nanoscale, concentric ridges around a lamp-on-a-chip known as a light-emitting diode, or LED, brightens the device's glow seven-fold.