Istraživanje samoudruživanja derivata nitrozobenzena na površini zlata mikroskopijom atomskih sila

master's thesis

• Title (english): Study of self-assembly of nitrosobenzene derivatives on gold surface by atomic force microscopy
• Author: Tomislav Marić
• Mentor: Ivana Biljan (mentor)
• Committee member: Ivana Biljan (predsjednik povjerenstva)
• Committee member: Željka Soldin (član povjerenstva)
• Committee member: Iva Juranović Cindrić (član povjerenstva)
• Committee member: Ivan Kodrin (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2021-02-18, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U ovom radu ispitan je utjecaj strukturnih i eksperimentalnih parametara (vremena adsorpcije i koncentracije otopine) na nastajanje samoudruženih slojeva derivata nitrozobenzena na površini zlata (111). Sintetizirana su dva derivata nitrozobenzena koji u para-položaju s obzirom na nitrozo skupinu sadrže alkilne lance različitih duljina na čijim krajevima se nalaze tiocijanatne skupine koje omogućuju adsorpciju spojeva na površinu zlata preko sumpora. Molekularni slojevi pripravljeni su uranjanjem supstrata zlata (111) u otopinu odgovarajućeg derivata nitrozobenzena poznate koncentracije na određeno vrijeme. Morfologija i strukturne značajke molekularnih slojeva derivata nitrozobenzena na površini zlata (111) istražene su mikroskopijom atomskih sila (AFM). Uočeno je da se derivati nitrozobenzena na površini zlata (111) samoudružuju u jednoslojeve i azodioksidne dvoslojeve. Rezultati ovog rada ukazuju da sposobnost formiranja samoudruženih molekularnih dvoslojeva derivata nitrozobenzena raste s vremenom na koje je supstrat zlata (111) uronjen u otopinu odgovarajućeg spoja te s povećanjem koncentracije otopine.

Abstract (english)

In this thesis, the influence of structural and experimental parameters (adsorption time and concentration of the solution) on the formation of self-assembled layers of nitrosobenzene derivatives on the gold (111) surface was investigated. Two nitrosobenzene derivatives with alkyl chains of different lengths in para-position relative to the nitroso group, ending with thiocyanate headgroups for adsorption on gold (111) surface, were synthesized. Molecular layers were prepared by immersing the gold (111) substrate in a solution of the corresponding nitrosobenzene derivative of known concentration for a defined time. The morphology and structural features of the molecular layers of nitrosobenzene derivatives on the gold (111) surface were investigated by atomic force microscopy (AFM). It has been observed that nitrosobenzene derivatives self-assemble into monolayers and azodioxy bilayers on the gold (111) surface. The results of this work indicate that the ability of nitrosobenzene derivatives to form self-assembled bilayers increases at longer adsorption times and higher solution concentration.

• Keywords: aromatski C-nitrozo spojevi; dimerizacija; mikroskopija atomskih sila; samoudruženi molekularni slojevi na zlatu
• Keywords (english): aromatic C-nitroso compounds; atomic force microscopy; dimerization; self-assembled molecular layers on gold
• Language: croatian
• URN:NBN: urn:nbn:hr:217:267904
• 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: 2023-02-18
• Created on: 2021-03-10 09:43:23