Per-and polyfluroalkyl substances (PFAS) are drawing increasing attention in the research community due to their wide spread applications and their toxicity to animals and humans. Effective early detection method of PFAS chemicals in aqueous environment is important to reduce exposure and mitigate the potential toxic effects. This study focuses on the electrochemical detection of per-fluoro octane sulfonate (PFOS) with differential pulse voltammetry and electrochemical impedance spectroscopy on a bare platinum electrode. We observe three distinct regions of adsorption behaviors with respect to PFOS concentration from 0-1000 nM, reflecting changes in the modes of adsorption due to different adsorbate-adsorbate interactions on a bare electrode. The adsorption isotherm constant for PFOS adsorption on a Pt electrode is calculated to be 1.6 × 10 12 cm 3 mol À 1 from fitting the electrochemical data with a modified Langmuir isotherm model.
In article number 2208919, Yulong Huang, Shenqiang Ren, and co-workers report in situ chemical tuning to realize the controllable transformation from low-temperature magnetic order to room-temperature hard magnetism in a layered molecular-based magnet. A coercivity of 8500 Oe and energy product of 0.6 MG Oe are demonstrated, providing a universal approach to control organic magnetism.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.