TY - CONF A1 - Stockmann, Jörg M. A1 - Radnik, Jörg A1 - Bütefisch, S. A1 - Busch, I. A1 - Passiu, C. A1 - Rossi, A. A1 - Unger, Wolfgang T1 - A new reference material for the determination of the Field of View of Small Area XPS N2 - Small Area Photoelectron Spectroscopy (XPS) is a powerful tool for investigating small surface features. It is often unclear, if the signal in the spectrum is an unwanted contamination of the Field of View (FoV) or is it originated from outside. The reason is, that XPS-spectra are affected by beam shapes. Scheithauer proposed to measure Pt apertures of different diameters and normalize the Pt4f count rate by a second measurement on the Pt metal. New reference materials were developed and tested in the VAMAS TWA2 A22 Project. T2 - ECASIA 2019 CY - Dresden, Germany DA - 15.09.2019 KW - Reference material KW - Small Area XPS KW - Selected Area XPS KW - Small Spot XPS KW - Field of Analysis PY - 2019 AN - OPUS4-49236 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mansfeld, Ulrich A1 - Pellegrino, F. A1 - Maurino, V. A1 - Marguet, S. A1 - Testard, F. A1 - Tache, O. A1 - Hodoroaba, Vasile-Dan T1 - Towards accurate analysis of particle size distribution for non-spherically shaped nanoparticles as quality control materials JF - Microscopy and Microanalysis N2 - Most industrial nanoparticles have non-spherical shapes and also possess polydisperse size distributions, and due to their agglomeration/ aggregation state are difficult (or even impossible) to be addressed individually. Further, driven by regulatory purposes related to the identification of a material as a nanomaterial, the accurate measurement of the smallest dimension of a (nano)particulate material makes the analysis even more complex. In the first phase of the EU Project nPSize - Improved traceability chain of nanoparticle size measurements (https://www.bam.de/Content/DE/Projekte/laufend/nPSize/npsize.html), the efforts are focused on synthesis of nanoparticles of well-defined, non-spherical shape. Following candidates of reference materials (CRM) with certifiable particle size (distribution) are under characterization with respect to their homogeneity and stability: (i) titania nanoplatelets (10-15 nm thickness x 50-60 nm lateral), (ii) titania bipyramides (~60 nm length x 40 nm width), (iii) titania acicular particles (100 nm length x 15-20 nm width; aspect ratio 5.5/6), (iv) gold nanorods (~10 nm width x 30 nm length), and (v) gold nanocubes (~55 nm x 55 nm x 55 nm). KW - Nanoparticles KW - Imaging KW - Non-spherical KW - Reference material KW - Particle size distribution PY - 2019 UR - https://www.cambridge.org/core/journals/microscopy-and-microanalysis/article/towards-accurate-analysis-of-particle-size-distribution-for-nonspherically-shaped-nanoparticles-as-quality-control-materials/CD48E9298865410124E22837D8CF73A0 DO - https://doi.org/10.1017/S1431927619012376 SN - 1431-9276 SN - 1435-8115 VL - 25 IS - Suppl. 2 SP - 2328 EP - 2329 PB - Cambridge University Press AN - OPUS4-48856 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -