Spectroscopic Differentiation and Microscopic Imaging of Red Organic Pigments Using Optical Pump-Probe Contrast.


Journal Article

Analysis of red organic pigments in artworks (and in forensics applications) is challenging, because conventional nondestructive mapping techniques provide little contrast, and most chemical analyses with high specificity require sample removal. Here we demonstrate a new optical approach, pump-probe microscopy, for the analysis of red organic pigments. We investigate Carmine naccarat, Lac dye, purpurin, alizarin, madder lake, and eosin Y and show that their intrinsic photophysical properties produce distinctive pump-probe spectra. We utilize this contrast for high-resolution, three-dimensional imaging without the need for physical sample removal. Lastly, we highlight the potential of pump-probe microscopy as an analytical tool for forensics of other types of organic colorants by investigating a series of automotive paints.

Full Text

Duke Authors

Cited Authors

  • Yu, J; Warren, WS; Fischer, MC

Published Date

  • November 2018

Published In

Volume / Issue

  • 90 / 21

Start / End Page

  • 12686 - 12691

PubMed ID

  • 30350615

Pubmed Central ID

  • 30350615

Electronic International Standard Serial Number (EISSN)

  • 1520-6882

International Standard Serial Number (ISSN)

  • 0003-2700

Digital Object Identifier (DOI)

  • 10.1021/acs.analchem.8b02949


  • eng