Seminars at DIFFER cover a wide range of topics and are held on Thursdays at 11.15 AM in the seminar room of the institute (unless otherwise stated). Seminars are open to everybody. If you are interested in visiting a DIFFER seminar or want to subscribe to our mailing list, please follow the instructions for external visitors.
List all past seminars organized at DIFFER
This work will describe a set of tools based on scanning probe and 3D microscopy to analyze nanostructures, from the optical, electrical to electrochemical perspective. We will show how fluorescence confocal microscopy can visualize the 3D extinction cross-section of GaAs NWs and to obtain the absorption coefficient and cross-section without the need of a transparent substrate. We demonstrate that by probing ordered arrays with this method, the effective absorption coefficient and cross-section can be obtained without the need of a transparent substrate. Moreover, we show how fluorescence microscopy is an insightful method to probe in real time the chemical environment of electrocatalysts. On the other hand, we will show that conducting atomic force microscopy is an emerging tool for the characterization of nano-wire based solar cells, where poor uniformity has hampered the large area device performance. As a final remark, we will demonstrate that SPM can become the ultimate nano-fabrication technology to create 3D nanostructures on demand.