Nanotubes signal when engine oil needs changing | Science News

ADVERTISEMENT

MISSION CRITICAL

Support credible science journalism.

Subscribe to Science News today.


News

Nanotubes signal when engine oil needs changing

By
10:19am, August 16, 2006

A new, easy-to-fabricate sensor made from carbon nanotubes detects when automobile-engine oil needs replacement.

As a car is driven, its lubricating oil undergoes chemical reactions with air and with combustion by-products. Those reactions degrade the oil—for instance, by causing chemicals known as hydroperoxides to build up. In previous work, other researchers had observed that carbon nanotubes become more electrically conductive when exposed to hydroperoxides.

This article is available only to subscribing members. Join the Society today or Log in.

Get Science News headlines by e-mail.

More from Science News