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May 31st, 2007

How to build a nanothermometer

Abstract:
One of the problems nanoscientists encounter in their forays into the nanoworld is the issue of accurate temperature measurement. Ever since Galileo Galilei invented a rudimentary water thermometer in 1593, accurate temperature measurement has been a challenging research topic and thermosensing technologies have become a field in their own right. Now, that technology has reached the nanoscale, temperature gradients are becoming essential in areas such as thermoelectricity, nanofluidics, design of computer chips, or hyperthermal treatment of cancer. Currently there is no established method how to measure the temperature gradients at the nanoscale. Most of today's probes are traditional bulk probes, the kind that gets inserted into a sample and measures the temperature. Liquid crystal films which change colors depending on temperature also have at least microscale thickness and lateral dimensions. A recent review addresses these issues and gives an overview of current and future developments for nanoscale temperature measurement technologies.

Source:
nanowerk.com

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