Publications by authors named "N Martensson"
Article Synopsis
- Tattoo pigment, particularly iron oxide, can migrate from the skin to regional lymph nodes and internal organs, raising concerns for MRI examinations.
- In a study with tattooed mice, evaluations showed minimal systemic distribution of these pigments, with no significant impact on the liver, kidney, or brain, and no adverse skin reactions when exposed to a static magnetic field.
- The research indicated that while tattoo pigments might cause image artefacts during MRI scans, they do not pose significant clinical health risks.
The study of surface properties at the nanoscale plays a crucial role in material science applications. This paper demonstrates the capabilities of Auger PhotoElectron Coincidence Spectroscopy (APECS) to obtain data with varying surface sensitivities from a single measurement. This makes it possible to extract the spectrum from the outermost surface layer even when faced with strongly overlapping surface and bulk spectral features, which we demonstrate by accurately extracting the surface component in Au 4f photoemission.
View Article and Find Full Text PDFArticle Synopsis
- Over the past 30 years, tattooed individuals have reported painful reactions during MRI scans, characterized by burning sensations, swelling, and redness, potentially linked to elements in tattoo inks.
- A case study of a young man with a recent black tattoo showed recurring painful reactions during MRIs, even without magnetic components in the ink, but these reactions lessened over time.
- The study suggests that the painful sensations may result from interactions between the tattoo's ink and dermal nerves, underlining the need for more research to understand these reactions and develop preventive strategies.
Auger-photoelectron coincidence spectroscopy (APECS) has been used to examine the electron correlation and itinerance effects in transition metals Cu, Ni and Co. It is shown that the LVV Auger, in coincidence with 2p photoelectrons, spectra can be represented using atomic multiplet positions if the 3d-shell is localized (atomic-like) and with a self-convoluted valence band for band-like (itinerant) materials as explained using the Cini-Sawatzky model. For transition metals, the 3d band changes from band-like to localized with increasing atomic number, with the possibility of a mixed behavior.
View Article and Find Full Text PDF