TY - JOUR A1 - Unger, Wolfgang A1 - Kalbe, Henryk A1 - Rades, Steffi T1 - Determining shell thicknesses in stabilised CdSe@ZnS core-shell nanoparticles by quantitative XPS analysis using an infinitesimal columns model T2 - Journal of Electron Spectroscopy and Related Phenomena N2 - A novel Infinitesimal Columns (IC) simulation model is introduced in this study for the quantitativeanalysis of core-shell nanoparticles (CSNP) by means of XPS, which combines the advantages of exist-ing approaches. The IC model is applied to stabilised Lumidot™CdSe/ZnS 610 CSNP for an extensiveinvestigation of their internal structure, i.e. calculation of the two shell thicknesses (ZnS and stabiliser)and exploration of deviations from the idealised CSNP composition. The observed discrepancies betweendifferent model calculations can be attributed to the presence of excess stabiliser as well as synthesisresidues, demonstrating the necessity of sophisticated purification methods. An excellent agreement isfound in the comparison of the IC model with established models from the existing literature, the Shardmodel and the software SESSA. PB - Elsevier B.V. KW - XPS KW - Quantum dot KW - Core shell nano particle PY - 2016 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/38273 AN - OPUS4-38273 SN - 0368-2048 VL - 212 SP - 34 EP - 43 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany