Fabrication and evaluation of two dimentional regular nanostructures

Friday, January 12, 2018 - 13:00
Rectorate Hall (K. Donelaicio St. 73-402 room)

Author, Institution: Danius Virganavičius, Kaunas University of Technology

Science Area, Field of Science: Technological Sciences, Materials Engineering - 08T

Summary of the Doctoral Thesis: Summary

Scientific Supervisor: Prof. Habil. Dr. Sigitas TAMULEVIČIUS (Kaunas University of Technology, Technological Sciences, Materials Engineering, 08T).

Dissertation Defence Board of Materials Engineering Science Field:

Habil. Dr. Arvaidas Galdikas (Kaunas University of Technology, Technological Sciences, Materials Engineering – 08T) – chairman
Dr. Mindaugas Andrulevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering– 08T),
Habil. Dr. Juozas Vidas Gražulevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering– 08T),
Dr. Juris Prikulis (University of Latvia, Technological Sciences, Materials Engineering – 08T),  
Dr. Arūnas Šetkus (Centre of Physical and Technological Sciences, Physical Sciences, Physics – 02P).

The doctoral dissertation is available on the internet and at the library of Kaunas University of Technology (K. Donelaičio g. 20,Kaunas)

Annotation: Nanomaterials exhibit uniquely different properties compared to their bulk counterparts. These properties are size-dependent, making it possible to engineer the material properties not only by defining the chemical composition but also by adjusting the structure. Therefore, the ability to control structure of matter at the nanoscale provides possibilities to engineer materials with tailored behavior and properties. The work presented in this dissertation aims to develop and advance combined fabrication strategies based on both top-down and bottom-up approaches in two distinct areas: structuring nanocomposite thin films and the formation of particle arrays. The first part is dedicated to structuring and surface modification of diamond-like carbon (DLC) thin films. DLC is an amorphous material with some properties that are similar to those of diamond. In this work, novel strategies based on nanoimprint lithography, imprintable hard masks and plasma techniques enabling straightforward, high throughput patterning of both DLC and DLC films doped with silver nanoparticles (DLC:Ag) were developed. The developed patterning process was successfully employed in fabrication of high sensitivity DLC-based optical refractive index sensors. The second part is dedicated to the development of capillary force assisted particle deposition setup and the assessment of assembly process. Dedicated equipment which can guide the assembly and allows direct observation of the procedure was constructed and tested. The influence of process driving parameters was evaluated and quantified. The possibilities of applying such particle arrays as a security feature were explored.