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Resonance Raman and UV-visible spectroscopy of black dyes on textiles

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Author(s)

  • Laurence C. Abbott
  • Stephen N. Batchelor
  • John R. Lindsay Smith
  • John N. Moore

Department/unit(s)

Publication details

JournalForensic Science International
DatePublished - 10 Oct 2010
Issue number1-3
Volume202
Number of pages10
Pages (from-to)54-63
Original languageEnglish

Abstract

Resonance Raman and UV-visible diffuse reflectance spectra were recorded from samples of cotton, viscose, polyester, nylon, and acrylic textile swatches dyed black with one of seven single dyes, a mixture of two dyes, or one of seven mixtures of three dyes. The samples generally gave characteristic Raman spectra of the dyes, demonstrating that the technique is applicable for the forensic analysis of dyed black textiles. Survey studies of the widely used dye Reactive Black 5 show that essentially the same Raman spectrum is obtained on bulk sampling from the dye in solution, on viscose, on cotton at different uptakes, and on microscope sampling from the dye in cotton threads and single fibres. The effects of laser irradiation on the Raman bands and emission backgrounds from textile samples with and without dye are also reported. (C) 2010 Elsevier Ireland Ltd. All rights reserved.

    Research areas

  • Raman spectroscopy, UV-visible spectroscopy, Raman microscopy, Dye, Cotton, Fibre, BIS-AZO DYE, FORENSIC ANALYSIS, COTTON FIBERS, SERRS SPECTROSCOPY, EVIDENTIAL VALUE, PEN INKS, SCATTERING, BLUE, IDENTIFICATION, ENVIRONMENT

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