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Destruction of perfluorooctanoic acid (PFOA) and perfluorooctadecanoic acid (PFOcDA) by incineration: Analysis of the by-products and their characteristics.
Chemosphere
January 2025
Graduate School of Science and Technology, Ryukoku University, 1-5 Yokotani, Seta Oe-cho, Otsu, Shiga 520-2194, Otsu, Japan. Electronic address:
Per- and polyfluoroalkyl substances (PFAS), which are considered an international problem due to their persistence in the environment, need to be properly treated in the end. In the destruction method by incineration, basic data are required to quantify the destruction characteristics of the target substance and the temperature-dependent behavior of its by-products. In this study, we conducted incineration tests targeting perfluorooctanoic acid (PFOA) and perfluorooctadecanoic acid (PFOcDA).
View Article and Find Full Text PDFMachine-Learning Modeling of Elemental Ferroelectric Bismuth Monolayer.
Phys Rev Lett
December 2024
Xi'an Jiaotong University, School of Microelectronics & State Key Laboratory for Mechanical Behavior of Materials, Xi'an 710049, China.
The bismuth monolayer has recently been experimentally identified as a novel platform for the investigation of two-dimensional single-element ferroelectric system. Here, we model the potential energy surface of a bismuth monolayer by employing a message-passing neural network and achieve an error smaller than 1.2 meV per atom.
View Article and Find Full Text PDFWe theoretically calculate the coupling loss between single-mode fibers (SMFs) and polymer optical waveguides with different refractive index profiles. Temperature resistance is one of the concerns when integrating polymer optical waveguides near the electronics and photonics chips where they are highly likely to dissipate heat. Hence, the calculation focuses on the core size variations due to changes in operating temperature.
View Article and Find Full Text PDFLow Temperature Atomic Layer Deposition of (00l)-Oriented Elemental Bismuth.
Angew Chem Int Ed Engl
January 2025
Leibniz-Institut fur Festkorper- und Werkstoffforschung Dresden eV, Helmholtzstraße 20, 01069, Dresden, GERMANY.
This study presents the first successful demonstration of growing elemental bismuth (Bi) thin films via thermal atomic layer deposition (ALD) using Bi(NMe2)3 as the precursor and Sb(SiMe3)3 as the co-reactant. The films were deposited at a relatively low temperature of 100 °C, with a growth per cycle (GPC) of 0.31-0.
View Article and Find Full Text PDFPh3PC - A Monosubstituted C(0) Atom in Its Triplet State.
Angew Chem Int Ed Engl
January 2025
TU Dortmund: Technische Universitat Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn Str.6, 44227, Dortmund, GERMANY.
This study introduces a novel class of carbon-centered diradicals: a monosubstituted C-atom stabilized by a phosphine. The diradical Ph3P→C was photochemically generated from a diazophosphorus ylide precursor (Ph3PCN2) and characterized by EPR and isotope-sensitive ENDOR spectroscopy at low temperatures. Ph3P→C features an axial zero-field splitting parameter D = 0.
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