Time-of-flight secondary ion mass spectrometry analysis of chitosan-treated viscose fibres

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Matjaž Finšgar, Tijana Ristić, Pedro Fardim, Lidija Fras Zemljič
Publisher: Elsevier
Publication year: 2018
Journal: Analytical Biochemistry
Journal acronym: Anal. Biochem.
Volume number: 557
Start page: 131
End page: 141
eISSN: 1096-0309


Abstract

Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was employed to analyse cellulose viscose fibres treated with different chitosan-based solutions. The analysis reports several new features in the TOF-SIMS spectra for systems with various forms of chitosan-treated surfaces. The characteristic positive ion TOF-SIMS signals for chitosan are reported at m/z 147.90, 207.07, and 221.09, and characteristic signals for trimethyl chitosan are present at m/z 58.03 and 102.09. Furthermore, new fragments were suggested to characterise acetylated chitosan molecules. The relative surface concentrations of different species were obtained based on the specific signal ratios (originating from a specific fragment and cellulose). SIMS imaging was then performed in order to investigate the surface distribution of chitosan, trimethyl chitosan, and Na-containing nanoparticles. In order to perform TOF-SIMS imaging, the above-mentioned characteristic signals were employed and m/z 22.99 was used for Na nanoparticles.


Keywords

Cellulose, Chitosan, Nanoparticles, Secondary Ion Mass Spectroscopy, surface analysis, ToF-SIMS, Viscose

Last updated on 2019-19-10 at 03:10