izpis_h1_title_alt

Vpliv fleksoelektričnosti na tekoče kristalne modre faze
ID Petrič, Matic (Author), ID Ravnik, Miha (Mentor) More about this mentor... This link opens in a new window

.pdfPDF - Presentation file, Download (7,56 MB)
MD5: F378649135817B57DD250D3299F6787A

Abstract
V magistrskem delu preučujem kiralne nematske strukture tekočekristalnih modrih faz. Najprej obravnavam termodinamično stabilnost ob odsotnosti fleksoelektričnosti, ter električnosti reda in primerjam strukture dvojno zvitih cilindrov in disklinacijskih linij z obstoječo literaturo. Ob upoštevanju fleksoelektričnosti in električnosti reda v sistemu modrih faz 1 in 2 se osredotočim na induciran električni potencial, ki izhaja iz polarizacije. Potencial numerično izračunam, ga prikažem ter raziščem vplive, ki jih ima na gostoto proste energije sistema. V primeru modre faze 1 opazim vzorce potenciala, ki jih preko analize direktorskega polja identificiram ter predlagam izboljšavo za shematičen prikaz osnovne celice modre faze 1. Ob spreminjanju koeficienta fleksoelektričnosti sistema opazujem, kakšen vpliv ima to na obliko električnega potenciala ter kako se na višje vrednosti fleksoelektričnosti prilagodi ravnovesna velikost osnovne celice. Obravnava vplivov fleksoelektričnosti na modre faze razkrije obstoj pasov električnega potenciala oziroma nanokanalov, ki bi se lahko uporabljali za transport ionov.

Language:Slovenian
Keywords:nematski tekoči kristali, modre faze, fleksoelektričnost, električnost reda, fleksoelektrični potencial, vizualizacija
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FMF - Faculty of Mathematics and Physics
Year:2023
PID:20.500.12556/RUL-144375 This link opens in a new window
COBISS.SI-ID:141675267 This link opens in a new window
Publication date in RUL:17.02.2023
Views:879
Downloads:52
Metadata:XML RDF-CHPDL DC-XML DC-RDF
:
Copy citation
Share:Bookmark and Share

Secondary language

Language:English
Title:The effect of flexoelectricity on liquid crystalline blue phases
Abstract:
Chiral nematic structures of liquid crystalline blue phases are observed in this master thesis. After observing the thermodynamic stability of the system with the absence of flexoelectricity and order electricity I compare the acquired double twist cylinder structures and the defect lattice with the one found in literature. After taking flexoelectricity and order electricity into account, I focus on the induced electric potential that arises. The induced potential is calculated, visualized, and further inspected in terms of the influence it has on the free energy density of the system. In the case of the blue phase 1 structure I notice patterns of the electric potential, which lead me to closely investigate the director field in those regions. An improved scheme to visualize the structure of blue phase 1 is proposed. I analyze the effects of different strengths of flexoelectricity and the effect it has on the shape of the electric potential, as well as on the optimal unit cell size. The analysis of the effects flexoelectricity has on such structures exposes the existence of a regular network of electric potential, which could be suitable for transport of ions.

Keywords:nematic liquid crystals, blue phases, flexoelectricity, order electricity, flexoelectric potential, visualization

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Back