Author, Institution: Asta Bronušienė, Kaunas University of Technology
Science area, field of science: Natural Sciences, Chemistry, N003
Scientific Supervisor: Prof. Dr. Ingrida Ancutienė (Kaunas University of Technology, Natural Sciences, Chemistry, N003)
Dissertation Defense Board of Chemistry Science Field:
Prof. Dr. Vytautas Getautis (Kaunas University of Technology, Natural Sciences, Chemistry, N003) – chairperson
Prof. Dr. Aldona Beganskienė (Vilnius University, Vilnius, Natural Sciences, Chemistry, N003)
Prof. Dr. Vytas Martynaitis (Kaunas University of Technology, Natural Sciences, Chemistry, N003)
Assoc. Prof. Dr. Jolanta Rousseau (Artois University, France, Natural Sciences, Chemistry, N 003)
Prof. Dr. Eugenijus Valatka (Kaunas University of Technology, Natural Sciences, Chemistry, N003)
Dissertation defense meeting will be at Rectorate Hall of Kaunas University of Technology (K. Donelaičio 73-402, Kaunas)
The doctoral dissertation is available at the library of Kaunas University of Technology (Gedimino 50, Kaunas) and on the internet: A. Bronušienė el. dissertation.pdf
Annotation: Deposition of thin films based on cheap and relatively simple processes using materials of high abundance is one of the most difficult challenges. It is very important to find inexpensive, environmentally friendly products that have the possibility of deposition in a large area and that adhere well to the substrate method. The aim of the work was to form environmentally friendly thin tin sulfide films by applying the safety and inexpensive SILAR method and using eco-friendly precursors, aqueous solutions, low deposition temperature, and environmental safety complexing agent. For the preparation of the tin-ascorbate complex biodegradable L-ascorbic acid was used as well as a reducing and capping agent for the synthesis. Structural, optical and electrical properties of the deposited thin tin sulfide films were investigated. In addition, these films were characterised for supercapacitor application.
In this paper, a simple, eco-friendly method for the fabrication of nanoscaled tin sulfide particles as a complexing agent using ascorbic acid is reported. From the data obtained it could be seen that there is a strong impact of annealing in all areas – compactness and thickness of the films, clearly expressed XRD peaks and improved supercapacitive characteristics of all obtained thin films of tin sulfide. These conditions allowed the obtainment of mechanically stable and electrochemically active tin sulfide films that could find the application in supercapacitors.