Porous silicon (PSi) is a nanostructured material possessing a huge surface area per unit volume. In consequence, the adsorption and diffusion of oxygen in PSi are particularly important phenomena and frequently cause significant changes in its properties. In this paper, we study the thermal oxidation of p+-type free-standing PSi fabricated by anodic electrochemical etching. These free-standing...

Abstract The leaves of Phaleria macrocarpa (Scheff.) Boerl is traditionally used to treat various diseases. contain flavonoids, alkaloids, tannins, glycosides, saponins, and steroids. This study aimed identify the simplicia extract, as well ethanol extract’s antioxidant activity, from leaves. extract was quantitatively tested using UV-Visible Spectrophotometry for its total phenol flavonoid con...