Fibres depth profiling

R.D. Penzhorn, N. Bekris, U. Berndt, J.P. Coad, H. Ziegler, W. Nagele, Tritium depth profiles in graphite and carbon fibre composite materials exposed to tokamak plasmas, J. Nucl. Mater. 288 (2001) 170... 

ATR-FTIR was used to determine the concentration of a chemical additive (cationic polyacrylamide resin) within a pulp fibre. The depth distribution of the additive was determined by sputter etching the fibre surface. The obtained profile was compared qualitatively with that obtained by the variable-angle ATR-FTIR depth profiling method. Most of the additive was located at the surface, with some distributed within the fibre (137). 

Fibre-probe LIBS instruments allow in situ analysis of matmals at a distance of 75 m [147]. LIBS is also used as a means of controlling the extent of ablation in painted artwork conservation [123] and in situ pigment identification [28,107]. Pigment analysis and depth profiling of successive paint layers is profitably carried out by LIBS (elemental information) in combination with Raman microscopy (molecular information) [148]. 

This illustrates the great importance of complementary studies with the differing photon sources as a means of depth profiling particularly for polymer surfaces of sanq)les in powder or fibre form for which routine angular dependent studies are not available. 

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