TITLE

Photothermal absorption microprobe: Infrared spectroscopy of a single 1 μm organic particle

AUTHOR(S)
Taubenblatt, Marc A.
PUB. DATE
March 1988
SOURCE
Applied Physics Letters;3/21/1988, Vol. 52 Issue 12, p951
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This letter describes a technique, based on photothermal absorption, for performing infrared spectroscopy with high sensitivity to a single micrometer-sized particle on a surface. The heat absorbed as a result of irradiation with a tunable infrared laser is monitored by observing the induced thermal expansion with a phase-sensitive microscope (an interferometer with a beam focused to a few micrometer spot diameter). The technique has a high specificity to a particle over background from substrate materials because of the poor heat conductance and small thermal mass of the particle. Spectra have been obtained from particles as small as 1 μm in diameter (which corresponds to 0.5 pg of material) with the use of only a few milliwatts of power from a tunable CO2 laser.
ACCESSION #
9826269

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics