Quantitative diagnostics of ancient paper using THz time-domain spectroscopy

Missori, M, Pawcenis, D, Bagniuk, J, Mosca Conte, A, Violante, C, Maggio, M S, Peccianti, M, Pulci, O and Lojewskab, J (2018) Quantitative diagnostics of ancient paper using THz time-domain spectroscopy. Microchemical Journal, 142. pp. 54-61. ISSN 0026-265X

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Abstract

In this work we have studied the terahertz spectra of modern artificially aged and ancient paper samples using terahertz time-domain spectroscopy. Hydrothermal artificial ageing was performed in closed and open reactors. Ancient paper samples were produced during the 15th century in European countries. The main aim of the work is the quantitative assessment of spectral feature observed by terahertz spectroscopy as a function of degradation. To this goal, the state of degradation of paper samples was characterized by crystallinity measurements obtained by using X-ray diffraction and by the degree of polymerization of cellulose polymers obtained by size exclusion chromatography. The behavior of the terahertz spectra was formerly investigated as a function of the hydration of paper samples. This allowed discriminating between the spectral features induced by the presence of water and those induced by degradation of paper. Results indicate clear dependences of spectral parameters from the evolution of crystallinity and the degree of polymerization. They can be used as a nondestructive analytical method to assess the state of degradation of ancient paper by terahertz spectroscopy.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Atomic, Molecular and Optical Physics Research Group
Subjects: C Auxiliary Sciences of History > CC Archaeology > CC135 Preservation, restoration, and conservation of antiquities. Antiquities and state
N Fine Arts > N Visual arts (General) For photography, see TR > N8554 Examination and conservation of works of art
N Fine Arts > ND Painting > ND1630 Examination and conservation of paintings
Q Science > QC Physics > QC0350 Optics. Light
Q Science > QC Physics > QC0350 Optics. Light > QC0395 Physical optics
Q Science > QC Physics > QC0350 Optics. Light > QC0395 Physical optics > QC0446.2 Nonlinear optics. Quantum optics
Q Science > QC Physics > QC0350 Optics. Light > QC0450 Spectroscopy
T Technology > TA Engineering (General). Civil engineering (General) > TA1501 Applied optics. Photonics
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Depositing User: Marco Peccianti
Date Deposited: 07 Jun 2018 15:01
Last Modified: 01 Jul 2019 12:31
URI: http://sro.sussex.ac.uk/id/eprint/76383

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