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master's thesis
Elektrokemijsko određivanje pK vrijednosti molekula stabilizatora adsorbiranih na površini nanočestica srebra
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. urn:nbn:hr:149:431168
Rukavina, Vanja
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

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Rukavina, V. (2018). Elektrokemijsko određivanje pK vrijednosti molekula stabilizatora adsorbiranih na površini nanočestica srebra (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:431168

Rukavina, Vanja. "Elektrokemijsko određivanje pK vrijednosti molekula stabilizatora adsorbiranih na površini nanočestica srebra." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:431168

Rukavina, Vanja. "Elektrokemijsko određivanje pK vrijednosti molekula stabilizatora adsorbiranih na površini nanočestica srebra." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:431168

Rukavina, V. (2018). 'Elektrokemijsko određivanje pK vrijednosti molekula stabilizatora adsorbiranih na površini nanočestica srebra', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:149:431168

Rukavina V. Elektrokemijsko određivanje pK vrijednosti molekula stabilizatora adsorbiranih na površini nanočestica srebra [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2018 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:149:431168

V. Rukavina, "Elektrokemijsko određivanje pK vrijednosti molekula stabilizatora adsorbiranih na površini nanočestica srebra", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:149:431168

Metadata
TitleElektrokemijsko određivanje pK vrijednosti molekula stabilizatora adsorbiranih na površini nanočestica srebra
Title (english)Electrochemical determination of the ionisation constant of capping agents adsorbed on the surface of silver nanoparticles
AuthorVanja Rukavina
MentorStjepan Milardović (mentor)
Committee memberStjepan Milardović (predsjednik povjerenstva)
Committee memberZoran Mandić (član povjerenstva)
Committee memberLidija Furač (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2018-09-27, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Inorganic Chemistry
Abstract
Predmet ovog rada bila je sinteza nanočestica srebra te njihova stabilizacija u otopini. Kao molekule stabilizatori homogene suspenzije korištena su dva polimera: poli(akrilna kiselina) (PAA) i poli(metakrilna kiselina) (PMA). Dobivene nanočestice su zatim taložene slabim organskim kiselinama: limunskom, octenom, jantarnom i askorbinskom kiselinom. Dobiveni praškasti produkt korišten je kao baza za pripravu vodljive tinte. Utjecaj taložnog sredstva na stabilnost dobivene formulacije, te interakcije između nanočestica, ispitane su metodama cikličke voltametrije (engl. cyclic voltammetry, CV), te elektrokemijskom impedancijskom spektroskopijom (engl. electrochemical impedance spectroscopy, EIS). Načinjen je niz eksperimenata u Britton-Robinsonovim puferima različitih pH vrijednosti. Sva su elektrokemijska mjerenja provodena u troelektrodnom sustavu koji se sastojao od radne elektrode (disk elektroda od staklastog ugljika), referentne elektrode (Ag|AgCl||3M KCl) i pomoćne elektrode (štapićasta platinska elektroda). Iz dobivenih rezultata određena je pKa vrijednost polikiselina adsorbiranih na površinu nanočestica.
Abstract (english)
The subject of this diploma work was the synthesis of silver nanoparticles and their stabilization in solution. As a homogeneous suspension stabilizer molecules, two polymers were used: poly(acrylic acid) (PAA) and poly(methacrylic acid) (PMA). Obtained nanoparticles were then precipitated using weak organic acids: citric, acetic, succinic, oxalic and ascorbic acid. The resulting powder product was used as a basis for the conductive ink preparation. The influence of the precipitation agent on the stability of the formulation as well as the interaction between the nanoparticles were studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). A series of experiments were performed in Britton-Robinson's buffers of different pH values. All electrochemical measurements were carried out in a three-electrode system consisting of a work electrode (glassy carbon disc electrode), a reference electrode (Ag|AgCl||3M KCl) and a platinum rod as a counter electrode. From the gained results, the pKa value of the polyacid adsorbed on the nanoparticle surface was determined.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:431168
Study programmeTitle: Chemical Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2020-10-29 12:16:54