New Opportunities in Micro- and Macro-Attenuated Total Reflection Infrared Spectroscopic Imaging: Spatial Resolution and Sampling Versatility

$29.00 plus tax (Refund Policy)

Buy Article:

Abstract:

New opportunities exist to obtain chemical images using attenuated total reflection infrared (ATR-IR) spectroscopy. This paper shows the feasibility of obtaining FT-IR images with a spatial resolution of at least 3-4 μm using a Ge ATR objective coupled with an infrared microscope. The improved spatial resolution compared to FT-IR images obtained by the transmission method is due to the high refractive index of the ATR crystal, which gives a high numerical aperture and hence, a higher spatial resolution. FT-IR imaging with a conventional diamond ATR accessory has been investigated. This is the first time that FT-IR imaging is reported using such a versatile accessory based on a diamond ATR crystal. These results showed that a spatial resolution up to 13 μm can be achieved without the use of infrared microscope objectives. One advantage of the diamond element is that it allows pressure to be applied and hence, good contact to be obtained over the whole field of view.

Keywords: ATR; ATTENUATED TOTAL REFLECTION; FOURIER TRANSFORM INFRARED IMAGING; FT-IR IMAGING; INTERNAL REFLECTION SPECTROSCOPY; POLYMER ANALYSIS; SKIN IMAGING; SPATIAL RESOLUTION

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/00037020360625907

Affiliations: Department of Chemical Engineering and Chemical Technology, Imperial College London, London, SW7 2AZ, UK

Publication date: April 1, 2003

More about this publication?
Related content

Tools

Favourites

Share Content

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