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Assessing near infrared and terahertz spectroscopy for the characterisation of organic heritage artefacts

Assessing near infrared and terahertz spectroscopy for the characterisation of organic heritage artefacts
Assessing near infrared and terahertz spectroscopy for the characterisation of organic heritage artefacts
Our objective is to define the most appropriate non-contact spectroscopic protocol with which to interrogate the identity, moisture content and chemical character of organic heritage artefacts, as exemplified by textiles, for informed conservation and long-term preservation. Here we report initial work on the application of near infrared (NIR) and terahertz (THz) spectroscopy to the analyses of natural fibre textiles. NIR wavelengths are sufficiently short for efficient transmission of the radiation through fibre optics, so that remote sampling is possible. THz spectroscopy has been developed much more recently as an analytical tool, and also offers a truly non-destructive approach. We have recorded non-contact NIR (7800 - 4000 cm?1) and THz (10GHz - 2THz) spectra of linen and other textile fabrics. While the terahertz spectra are not immediately distinct, the near infrared spectra allow differentiation of the broad categories of textiles. THz absorption increases with moisture sorption; besides microstructural and chemical information, NIR spectra may also reveal the moisture content of fabrics. A preliminary analysis of linen suggests that by providing this information non-invasively, NIR spectroscopy has the potential for on-site monitoring of the deterioration state of fabrics.
near infrared spectroscopy, terahertz spectroscopy, conservation science, remote sampling, linen
8889758007
ICR
Garside, P.
dfe43fec-1076-4912-bba9-3e96830252b7
Miles, R.
34622a80-7abd-400b-968d-04b75d1d1380
Naftaly, M.
dc37eb5b-96ff-438f-a887-cce29d7638c6
Stringer, M.
9ff08ded-8a66-4486-b846-25dc5fadf540
Wyeth, P.
cc2fbe44-9585-4f9e-b3f4-477d0a2a96cb
Garside, P.
dfe43fec-1076-4912-bba9-3e96830252b7
Miles, R.
34622a80-7abd-400b-968d-04b75d1d1380
Naftaly, M.
dc37eb5b-96ff-438f-a887-cce29d7638c6
Stringer, M.
9ff08ded-8a66-4486-b846-25dc5fadf540
Wyeth, P.
cc2fbe44-9585-4f9e-b3f4-477d0a2a96cb

Garside, P., Miles, R., Naftaly, M., Stringer, M. and Wyeth, P. (2005) Assessing near infrared and terahertz spectroscopy for the characterisation of organic heritage artefacts. In Proceedings ART’05 8th International Conference on “Non-Destructive Investigations and Microanalysis for the Diagnostics and Conservation of the Cultural and Environmental Heritage". ICR..

Record type: Conference or Workshop Item (Paper)

Abstract

Our objective is to define the most appropriate non-contact spectroscopic protocol with which to interrogate the identity, moisture content and chemical character of organic heritage artefacts, as exemplified by textiles, for informed conservation and long-term preservation. Here we report initial work on the application of near infrared (NIR) and terahertz (THz) spectroscopy to the analyses of natural fibre textiles. NIR wavelengths are sufficiently short for efficient transmission of the radiation through fibre optics, so that remote sampling is possible. THz spectroscopy has been developed much more recently as an analytical tool, and also offers a truly non-destructive approach. We have recorded non-contact NIR (7800 - 4000 cm?1) and THz (10GHz - 2THz) spectra of linen and other textile fabrics. While the terahertz spectra are not immediately distinct, the near infrared spectra allow differentiation of the broad categories of textiles. THz absorption increases with moisture sorption; besides microstructural and chemical information, NIR spectra may also reveal the moisture content of fabrics. A preliminary analysis of linen suggests that by providing this information non-invasively, NIR spectroscopy has the potential for on-site monitoring of the deterioration state of fabrics.

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More information

Published date: 2005
Venue - Dates: ART’05. 8th International Conference on “Non Destructive Analysis and Micro-analysis for the Diagnosis and the Conservation of Cultural Heritage and the Environment”, Lecce, Italy, 2005-05-14 - 2005-05-18
Keywords: near infrared spectroscopy, terahertz spectroscopy, conservation science, remote sampling, linen

Identifiers

Local EPrints ID: 18713
URI: http://eprints.soton.ac.uk/id/eprint/18713
ISBN: 8889758007
PURE UUID: 0d8536ae-70e7-4680-98c1-528f615c31b7

Catalogue record

Date deposited: 23 Nov 2005
Last modified: 22 Apr 2020 16:38

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