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Title: Near-IR surface-enhanced Raman spectrum of lignin

Source: J. Raman Spectrosc. 2009, 40, 1527-1534; 2009

Author(s)Agarwal, Umesh P.; Reiner, Richard S.

Publication Year: 2009  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4709-3A

Abstract: Compacted powders of commercially available nano- andmicroparticles of silver were used to successfully induce the surface enhanced Raman scattering (SERS) effect in spruce milled-wood lignin (MWL). For the two silver particle sizes used in this investigation, the spectra were mostly similar. Some general characteristics of the lignin SERS spectrum are described. The ERS techniquewas found to be sensitive for detecting lignin. Significant spectral changes were present between the SERS and normal Raman spectra of MWL. The SERS spectrum was assigned on the basis of literature-reported vibrational assignments of lignin and itsmodels. Based on significant changes in Raman features,we propose that the lignin is strongly adsorbed on silver. To determinewhether SERS of lignin can be obtained directly fromwood without its isolation, Wiley-milled sprucewood(WMW) dsorbed on silver was studied. The results indicated that not only the surface-enhancement effect was successfully induced in theWMW, but that its spectrum was similar to MWL SERS. Moreover, for WMW, no signals from the carbohydrate components were observed, and therefore, lignin was detected selectively. This nano- and microparticle-basedmolecularly specificmethod is expected to make a significant contribution in identifying and investigating lignin in various lignin-containing materials.

Keywords: Surface-enhanced Raman scattering (SERS), lignin, cellulose, wood, silver, nano, micro, benzoic acid, muconic acid, Raman spectroscopy, lignin analysis, spectrum analysis, wood chemistry, nanotechnology, black spruce, carbohydrates, nanoparticles, surface enhanced Raman spectroscopy, particle sizes

File size: 380 kb(s)

Date posted: 11/20/2009

This publication is also viewable on Treesearch:  view
RITS Product ID: 32217
Current FPL Scientist associated with this product
Agarwal, Umesh P.
Research Chemist
  

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