Skip to main content

The Reverse Mirage Effect: Catching the Thermal Wave at the Solid/Liquid Interface

Buy Article:

$29.00 plus tax (Refund Policy)

Abstract:

Detection of species at the solid/liquid interface using infrared spectroscopy is severely limited by the opacity of most liquids to the infrared beam. In this work we use a variant of the photothermal beam deflection ("mirage effect") method to avoid this problem. With this variant of the method (the "reverse mirage effect"), the IR beam passes through a transparent solid first, and then is absorbed by a liquid medium or by chromophoric species at the solid/liquid interface. The probe laser beam grazes the nonilluminated (back) surface of the solid and is deflected by the thermal gradient in the liquid. Results are presented that were obtained with the use of the reverse mirage technique with single-crystal silicon as the transparent solid and the use of pure acetonitrile as the absorbing sample and beam deflection medium. Studies of the position of the laser probe beam center with respect to the Si/CH3CN interface reveal interesting qualities about photothermal detection within the absorbing medium. The resulting spectra are analyzed in terms of the Rosencwaig-Gersho model.

Keywords: Fourier transform infrared spectroscopy; Infrared spectroscopy of solid/liquid interfaces; Infrared spectroscopy of surfaces; Mirage effect; Photothermal beam deflection spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702874447437

Affiliations: P. M. Gross Chemical Laboratory, Duke University, Durham, North Carolina 27706

Publication date: September 1, 1987

More about this publication?
sas/sas/1987/00000041/00000007/art00002
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more