The family of antiferromagnetic layered metal hexathiohypo diphosphates, M2P2S6 represents a versatile class of materials, particularly interesting for fundamental studies on magnetic properties in low dimensional structures, and yet exhibiting great potential for a broad variety of applications including catalysis, energy storage and conversion, and spintronics. In this work, three representatives of this family of 2D materials (M = Fe, Ni, and Mn) are exfoliated in the liquid phase under inert conditions and the nanosheet’s properties are studied in detail for different sizes of all three compounds. Centrifugation-based size selection is performed for this purpose. The exfoliability and structural integrity of the nanosheets is studied by statistical AFM and TEM measurements. Further, we report size and thickness dependent optical properties and spectroscopic metrics for the average material dimensions in dispersion, as well as the nanomaterials’ magnetic response using a combination of cryo-Raman and SQUID measurements. Finally, the material stability is studied semi-quantitatively, using time and temperature dependent extinction and absorbance spectroscopy, enabling the determination of the materials’ half-life, portion of reacted substance and the macroscopic activation energy for the degradation.

The development of high-frequency devices and transducers in recent years has enabled the growth of the use of dermatological ultrasound (US). Real-time monitoring of the anatomy of the face during the application of aesthetic injectables potentially prevents complications such as vascular occlusions. The injecting physicians who are starting out in the practice of ultrasound-guided injections are commonly faced with practical questions about its use. In this approach based on experience with US-guided filler injections of 2 large clinical centers in two countries, the authors summarize the steps to start the use of ultrasound to guide injectable aesthetic procedures, such as fillers and biostimulators. First, the authors discuss factors that guide the choice of an equipment and of ultrasound transducers to perform the procedures. Next, the authors have a detailed discussion on practical issues related to the procedure. Then, the authors will approach forms of positioning the professionals and equipment in the treatment field. The authors conclude with the suggestion of two possible techniques to guide injectable procedures: 1) scan before injecting or 2) scan while injecting.

No abstract