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Study of the lignin model compound supramolecular structure by combination of near-field scanning optical microscopy and atomic force microscopy.

Authors
  • Micic, Miodrag
  • Radotic, Ksenija
  • Jeremic, Milorad
  • Djikanovic, Daniela
  • Kämmer, Stefan B
Type
Published Article
Journal
Colloids and Surfaces B Biointerfaces
Publisher
Elsevier
Publication Date
Mar 01, 2004
Volume
34
Issue
1
Pages
33–40
Identifiers
PMID: 15261088
Source
Medline
License
Unknown

Abstract

In this paper, we present a nanoscale study of the supramolecular structure of the dehydrogenate polymer (ZL-DHP) lignin model compound. The combination of near-field scanning optical microscopy (NSOM or SNOM) and atomic force microscopy (AFM) has been utilized to explore physicochemical properties of the lignin model compound on a scale ranging from individual macromolecules to globular supramolecular assemblies. By utilizing NSOM in transmission mode, the optical inhomogeneity in the lignin supramolecular structure has been observed for the first time. In particular, the transmission-mode NSOM images reveal a combination of hollow and layered supramolecular globular structure in the lignin model compound. Through the paired use of TappingMode and pulsed-mode AFM, we have also confirmed the existence of regions with different rheological properties on the single lignin model compound supramolecular assembly.

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