Elipsometrijsko istraživanje samoudruženih slojeva derivata nitrozobenzena na površini zlata

master's thesis

• Title (english): Ellipsometry study of self-assembled layers of nitrosobenzene derivatives on gold surface
• Author: Marina Koprivnjak
• Mentor: Ivana Biljan (mentor)
• Committee member: Ivana Biljan (predsjednik povjerenstva)
• Committee member: Davor Kovačević (član povjerenstva)
• Committee member: Iva Juranović Cindrić (član povjerenstva)
• Committee member: Hrvoj Vančik (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2019-02-21, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U ovom radu istražen je utjecaj strukture adsorbata, vremena na koje je supstrat uronjen u
otopinu adsorbata te koncentracije otopine na stvaranje samoudruženih monomolekulskih i
bimolekulskih slojeva derivata nitrozobenzena na površini zlata (111). U tu svrhu pripravljena
su tri derivata nitrozobenzena koji su u para-položaju obzirom na nitrozo skupinu supstituirani
alkilnim lancima različitih duljina na čijim se krajevima nalaze tiocijanatne skupine.
Samoudruženi molekulski slojevi priređeni su adsorpcijom derivata nitrozobenzena na površinu
zlata (111) preko atoma sumpora. Prosječne debljine molekulskih slojeva derivata
nitrozobenzena na zlatu te njihova ovisnost o strukturi adsorbata i eksperimentalnim uvjetima
priprave slojeva istražene su pomoću elipsometrije. Rezultati ovog rada ukazuju da sposobnost
formiranja samoudruženih bimolekulskih slojeva derivata nitrozobenzena s kraćim alkilnim
lancima raste s vremenom na koje je supstrat zlata uronjen u otopinu spoja te s povećanjem
koncentracije otopine.

Abstract (english)

The influence of the adsorbate structure, the adsorption time and the concentration of the solution on the formation of self-assembled mono- and bilayers of nitrosobenzene derivatives on gold (111) surface was investigated. For that purpose, three nitrosobenzene derivatives substituted with thiocyanate-ended alkyl chains of different lengths in a para-position relative to the nitroso group were synthesized. Self-assembled layers were prepared by adsorption of nitrosobenzene derivatives on the gold surface through the sulphur atom. The average thicknesses of the molecular layers of nitrosobenzene derivatives and their dependence on the adsorbate structure and experimental conditions of layer preparation were studied by ellipsometry. The results of this work indicate that the ability of nitrosobenzene derivatives with shorter alkyl chains to form self-assembled bilayers increases with the adsorption time and with the increase of the concentration of the solution.

• Keywords: aromatski C-nitrozo spojevi; dimerizacija; elipsometrija; samoudruženi molekulski slojevi na zlatu
• Keywords (english): aromatic C-nitroso compounds; dimerization; ellipsometry; self-assembled layers on gold
• Language: croatian
• URN:NBN: urn:nbn:hr:217:801128
• Study programme: Title: Graduate university studies in chemistry; specializations in: Research programme; Course: Research programme; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2021-03-21
• Created on: 2019-03-18 14:21:35