Speaker
Description
Two-dimensional materials are comprised of single- or few-layers of atoms arranged in a crystalline lattice structure. These materials exhibit unique properties due to their ultrathinness and the ability to adjust the number of layers. The research field surrounding these materials has gained significant interest since the discovery of graphene and its derivatives [1]. Recently, other 2D materials, such as few-layered transition metal chalcogenides, have also been explored [2]. Moreover, researchers have been exploring surface chemical modifications on these layered materials, taking advantage of their large surface-to-volume ratios. In our research, we have investigated surface chemical modifications for graphene oxide and molybdenum dissulfide colloidal suspensions. This talk emphasizes the application of spectroscopic methods in monitoring such surface modification processes aiming at developing functional 2D nanostructures. Specifically, we used Raman and fluorescence spectroscopies to study selected functionalized layered nanosystems, that were designed to respond to the presence of target analytes in solution. Overall, this research aims to contribute to the development of spectroscopic methods applied to 2D materials for optical
sensors.
References
1. K. S. Novoselov, Graphene: Materials in the Flatland (Nobel Lecture), Angew. Chem. Int. Ed. 2011, 50, 6986.
2. B. Urbaszek, A. Srivastava, Materials in flatland twist and shine, Nature 2019, 567, 39.
Acknowledgements
This work was developed within the scope of the project CICECO – Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 &
LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC) and when appropriate cofinanced by FEDER under the PT2020 Partnership Agreement. S. F. thanks FCT for her research contract (REF-069-88-ARH-2018), which is funded by national funds (OE), through FCT-Fundação para a Ciência e Tecnologia, I.P.
