Military University of Technology, Warsaw, Poland
Date: October 4, 2023
Time: 1000–1100h ET
Porous anodic oxide (PAA) is one of the self-organizing materials whose pore geometry can be fully controlled by variation of electrochemical parameters during aluminum anodization. Under certain conditions pores grow into a hexagonal close-packed (hcp) structure. The self-organization regime holds within narrow anodization conditions which are usually limited to a given voltage dependent on a type of electrolyte used in anodization. Outside this regime, regularity of pore arrangement deteriorates significantly. The factors that are responsible for the pore organization are still not fully recognized as the synthesis of PAA with large interpore intervals (Dc > 380 nm) is still under development. The overall PAA growth process is complicated, but it is believed that regularity of pore formation is governed mainly by an equilibrated counter-ion (Al3+ and electrolyte anions A−) exchange at the electrolyte/oxide interface. The self-ordering conditions were quite well elaborated for relatively low voltages which enabled obtaining PAA with Dc ranging between 60–140 nm. However, producing the self-ordered PAA with larger Dc remains challenging because it usually involves anodization under high voltages that is prone to instabilities and breakdown events. During the webinar, recent achievements in the production of PAA including high-voltage anodization are discussed, focusing on the strategies that can lead to the self-ordering growth of PAA with large Dc.
An interactive Q&A session follows the presentation.
Benefits of attending the webinar
Self-ordering anodization conditions and important factors leading to regular PAA growth;
Strategies to maintain a stable high-voltage anodization to produce PAA with large pore intervals;
Synthesis of functional materials based on PAA.
Małgorzata Norek worked at the Military University of Technology, Warsaw, first as an Assistant Professor (2009-2018), and later as an Associate Professor (2018-present). Her current scientific interests focus on the synthesis and characterization of porous anodic alumina (PAA), fabrication and characterization of PAA-based photonic structures, templated synthesis of ordered nanostructures (e.g., SnO2, ZnO), investigation of optical properties of selected semiconductor nanostructures, and optimization of these properties by modifying their surface.
From 2003-2005, Dr. Malgorzata worked in the Institute of Physics, Polish Academy of Science in Warsaw, where she investigated photophysical properties of aromatic molecules. She received the EC Marie Curie Fellowship twice: in 2004 at the Università degli Studi di Firenze, where she investigated symmetry of triplet states of monoazaphenanthrenes by Optically Detected Magnetic Resonance. At the Technische Universiteit Delft from 2005-2008, she worked on preparation and evaluation of Lanthanide (III) containing contrast agents for medical diagnosis and therapy. Dr. Malgorzata completed her PhD at the Technische Universiteit Delft in 2008.
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