Sinteza srebrenih nanožica

undergraduate thesis

• Title (english): Synthesis of silver nanowires
• Author: Mario Cvetković
• Mentor: Stanislav Kurajica (mentor)
• Committee member: Stanislav Kurajica (predsjednik povjerenstva)
• Committee member: Andrea Jurov (član povjerenstva)
• Committee member: Leonard Bauer (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2022-09-23, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Basic Technical Sciences

Abstract

U suvremenoj tehnologiji i znanosti postoji veliko zanimanje za procese sinteze nanomaterijala. Nanomaterijalima se, između ostalih materijala, smatraju nanožice. Nanožice su omogućile unaprjeđenje pojedinih uređaja u kojima funkcioniraju kao vodljivi sloj u uređajima, odnosno prozirna elektroda. U navedenim primjenama najčešće se koriste srebrne nanožice. Srebrne nanožice izvrstan su vodič električne i toplinske energije što ih čini materijalom idealnim za korištenje prijenosa energije. Postoji više metoda sinteze srebrnih nanožica poput metode tvrdog predloška koja koristi nanoporozne krute (čvrsta tvar sa porama veličine nekoliko nanometara) tvari kako bi se oblikovale nanožice. Postoje još metode mekog predloška od kojih je najvažnija poliol metoda koja koristi organski spoj kao predložak za oblikovanje nanožica. Poliol metoda koristi se češće zbog jednostavnosti i dobrog iskorištenja. U ovom radu proveden je eksperiment sinteze srebrnih nanožica poliol metodom kako bi se iskušala učinkovitost procesa. Eksperiment se sastoji od zagrijavanja etilen glikola na 160 °C u koji se dodaje bakrov(Ⅱ) klorid, otopina poli(vinil-pirolidona) u etilen glikolu i otopina srebrovog nitrata u etilen glikolu. U eksperimentu se nadalje nastojalo izdvojiti srebrne nanožice kako bi se provela njihova analiza i iskušala moguća primjena. Rezultati provedenog eksperimenta pokazali su da su dobivene srebrne nanožice, no sinteza nije bila u potpunosti uspješna zbog malog iskorištenja i djelomičnog nastanka sferičnih čestica.

Abstract (english)

In modern technology and science, there is a great interest for the synthesis processes of nanomaterials. Among other type of nanomaterials are nanowires. Nanowires were step towards improving devices in which they are used as a conductive layer, i.e., transparent electrodes. Silver nanowires are most often used in the mentioned technologies. Silver nanowires are excellent conductors of electrical and thermal energy which makes them the excellent material for use in energy transmission. There are several methods of silver nanowires synthesis, such as the hard template method, which uses nanoporous solids (a solid with pores a few nanometers in size) to form the nanowires. There are also many soft template methods, the most important of which is the polyol method, which uses an organic compound as a template for forming nanowires. The polyol method is used often due to simplicity and good yield. In this work an experiment on the synthesis of silver nanowires using the polyol method was carried out to test the efficiency of the process. The experiment consisted of heating ethylene glycol to 160 °C, adding copper(Ⅱ) chloride, a solution of poly(vinyl-pyrrolidone) in ethylene glycol and a solution of silver nitrate in ethylene glycol. The experiment further aimed to isolation of silver nanowires to carry out their analysis and test possible application. The results of the conducted experiment showed that silver nanowires were obtained, but the synthesis was not completely successful due to poor yield and partial obtaining of spherical particles.

• Keywords: srebrne nanožice; poliol metoda; elektronska mikroskopija
• Keywords (english): silver nanowires; polyol method; electrone microscopy
• Language: croatian
• URN:NBN: urn:nbn:hr:149:155796
• Study programme: Title: Materials Science and Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-02-21 08:25:45