Lower Limit Of The Thickness Of The Measurable Surface Layer On Infrared Absorbing Substrate By FT-IR-ATR Spectroscopy

Koji Ohta; Reikichi Iwamoto

doi:10.1117/12.970926

20 December 1985 Lower Limit Of The Thickness Of The Measurable Surface Layer On Infrared Absorbing Substrate By FT-IR-ATR Spectroscopy

Koji Ohta, Reikichi Iwamoto

Author Affiliations +

Proceedings Volume 0553, Fourier and Computerized Infrared Spectroscopy; (1985) https://doi.org/10.1117/12.970926
Event: 1985 International Conference on Fourier and Computerized Infrared Spectroscopy, 1985, Ottawa, Canada

Abstract

Based on verification of Harrick's relation between absorbances of absorption bands and the thickness of the surface layer probed in ATR spectroscopy, we have studied the lower limit of the thickness of a surface layer on an infrared absorbing substrate that can be measured by spectral subtraction of FT-IR-ATR spectra. Spectral observability of a surface layer of a thickness is predictable by comparing the expected absorbances of the bands of the surface layer with the detectable least signal increment obtainable from the noise level of a spectrometer. The limit of the thickness is, in general, 10 to 50 A for polymers.

Citation Download Citation

Koji Ohta and Reikichi Iwamoto "Lower Limit Of The Thickness Of The Measurable Surface Layer On Infrared Absorbing Substrate By FT-IR-ATR Spectroscopy", Proc. SPIE 0553, Fourier and Computerized Infrared Spectroscopy, (20 December 1985); https://doi.org/10.1117/12.970926

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available