At a moment the investigation of materials that have plasmonic properties becomes more intense. One of these plasmonic materials graphene can have many electrooptical applications because of its unique mechanical, optical and electrical properties. Despite all these benefits in order to use graphene practically the methods of its synthesis have to be improved, to prepare it of best possible quality and sophisticate the methods of graphene quality analysis. It is worth to mention that the defects of the structure of graphene can be useful for various applications, but before that, the influence of the defects to graphene properties should be understood. During the planned internship of the student, the ultrafast relaxation dynamics of an excited state of graphene layers prepared by a microwave plasma enhanced chemical vapour deposition (PECVD) method will be explored. The layers will be deposited on cooper films and transferred on quartz or directly on various substrates like quartz or silica. For the investigation of ultrafast excited state relaxation dynamics of graphene layers’ transient absorption spectrometer (TAS) will be used, by using this technique the structure of graphene influence to excite state relaxation dynamics can be explored. By using various methods of materials analysis like Raman scattering spectroscopy, atomic force microscopy, scanning electron microscopy and other technique the structure of prepared graphene layers will be related and compared with the results of TAS measurements. At the end of the internship, the new methodology will be created about how to link the structure and defects of graphene layers to the results of TAS measurements.
Project funding:
Project is funded by EU Structural Funds according to the 2014–2020 Operational Programme for the European Union Funds’ Investments priority “Development of scientific competence of researchers, other researchers, students through practical scientific activities” under Measure No. 09.3.3-LMT-K-712.
Project results:
1. The trainee has mastered measurement methodology of TAS and the analysis of its results.
2. Investigation of graphene and other plasmonic nanostructures have been done using TAS.
3. The trainee has learned to prepare measurements by TAS and interpret their data on his own
4. The structure of investigated graphene has been related to the results of TAS measurements.
Period of project implementation: 2019-07-01 - 2019-08-30
Project coordinator: Kaunas University of Technology
