Study of the traditional Chinese pigments by terahertz time-domain and Fourier-transform infrared spectroscopy

Abstract

By utilizing terahertz time-domain spectroscopy and fourier-transform infrared spectroscopy, several kinds of traditional Chinese pigments have been investigated covering the spectral region 0.25 THz- 7 THz. The experimental results demonstrate that all pigments studied in the present work show a series of characteristic absorption spectra, which are unique to the pigment species. According to the fingerprint spectra, we can confirm that the traditional Chinese pigments have been applied to the heritage buildings and artworks. Compared with X-ray diffraction, Raman spectroscopy and near-infrared spectroscopic techniques, these experimental results reveal that terahertz time-domain spectroscopy could further fill their physical information what other techniques cannot obtain.

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