Identification of Natural Dyes on Ag Nanoparticles by Surface-Enhanced Raman Scattering
- Identification of Natural Dyes on Ag Nanoparticles by Surface-Enhanced Raman Scattering
- 이지혜; 김민정; Philippe Walter; 이연희
- Natural dyes; Ag nanoparticle; SERS
- Issue Date
- International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE 2014)
- Analytical identification of dyes in archaeological textiles is an indispensable task for conservation research and restoration of ancient remains. However, excavated textiles were changed in the color because of burial environment through centuries and gradually fade after excavation. Several studies have been dedicated to the identification of dyes in various types of textiles by using various analytical techniques such as LC-MS, GC-MS, and HPLC. In most of these techniques, the dyes should be extracted from the textile fibers before the analysis of the colorant. Therefore, nowadays non-destructive and high sensitivity techniques such as TOF-SIMS and Raman have been studied. In this study, the highly fluorescent natural dyes were easily identified in textiles by SERS employing Ag nanoparticles. Different SERS supports and adsorption condition were investigated. Ag nanoparticles were prepared by various methods. We compared Ag colloids obtained by reduction with sodium citrate or hydroxylamine hydrochloride with silver nanoislands films obtained by vacuum sputtering. Prior to analysis of excavated textiles, we identified characteristic peaks of natural dyes such as indigo, alizarin, purpurin, curcumin and quercetin using SERS. After SERS methodology with Ag nanoparticles to determine the natural dyes in the textiles was established, surface analytical techniques were also carried out on ancient textiles from Korean tombs and Mongolian area. Surface analytical instruments such as TOF-SIMS, FT-IR, and SERS were used for dye detection and their results were compared.
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