Author, Institution: Linas Kudrevičius, Kaunas University of Technology
Science area, field of science: Technological Sciences, Materials Engineering, T008
Research supervisor: Prof. Dr. Diana Adlienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Dissertation Defence Board of Materials Engineering Science Field:
Prof. Dr. Hab. Arvaidas Galdikas (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) – chairperson
Prof. Dr. Jury Dekhtyar (Riga Technical University, Latvia, Technological Sciences, Materials Engineering, T008)
Assoc. Prof. Dr. Valdas Girdauskas (Vytautas Magnus University, Natural Sciences, Physics, N002)
Prof. Dr. Hab. Juozas Vidas Gražulevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Prof. Dr. Giedrius Laukaitis (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Dissertation defence 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: L. Kudrevičius el. dissertation.pdf
© L. Kudrevičius, 2026 “The text of the thesis may not be copied, distributed, published, made public, including by making it publicly available on computer networks (Internet), reproduced in any form or by any means, including, but not limited to, electronic, mechanical or other means. Pursuant to Article 25(1) of the Law on Copyright and Related Rights of the Republic of Lithuania, a person with a disability who has difficulties in reading a document of a thesis published on the Internet, and insofar as this is justified by a particular disability, shall request that the document be made available in an alternative form by e-mail to doktorantura@ktu.lt.”
Annotation: The dissertation investigates the development and application of PVA-based colour-changing polymer composite films for ionizing radiation detection. Three film systems were fabricated and evaluated: PVA–dye composites for low-dose indication, silver-modified PVA films for the analysis of radiation-induced optical changes, and Ag–PVA–dye composites combining dye bleaching with the formation of silver-related nanostructures. The influence of dye class, AgNO₃ concentration, solvent composition and storage conditions on dose sensitivity, optical response and post-irradiation stability was assessed. The films were characterized using UV–Vis spectrophotometry, FTIR, XRD, SEM/EDS and AFM methods. A pilot study was also performed to evaluate the applicability of silver-modified PVA films for secondary 2D dose verification in stereotactic radiosurgery using an individualized Gamma Knife treatment plan.