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Title:Au-nanoparticle synthesis via ultrasonic spray pyrolysis with a separate evaporation zone
Authors:ID Majerič, Peter (Author)
ID Friedrich, Bernd (Author)
ID Rudolf, Rebeka (Author)
Files:.pdf Materiali_in_Tehnologije_2015_Majeric,_Friedrich,_Rudolf_Au-nanoparticle_synthesis_via_ultrasonic_spray_pyrolysis_with_a_separate_evapor.pdf (752,54 KB)
MD5: 197D587248E8C98E3CD24B1C85B2B5F7
 
URL http://mit.imt.si/Revija/izvodi/mit155/majeric.pdf
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:Some experiments were conducted in connection with the gold-nanoparticle production in an effort to produce a more accurate model for determining the gold-nanoparticle synthesis with a modified ultrasonic spray pyrolysis (USP). As previous experi- ments with gold nanoparticles yielded nanoparticles of various shapes (spherical, triangular, cylindrical, etc.), a focus on synthesizing only spherical nanoparticles is underway, as a mixture of different shapes is difficult to characterize and utilize. One of the factors for the particle formation is droplet evaporation. In an attempt to produce the optimum conditions for droplet evaporation with the solvent diffusion and precipitation, a separate furnace and a separate reaction-gas inlet were used. This modification separates the evaporation stage from the reaction stage, compared to the standard USP set-up. Using relatively low temperatures, from 60 °C up to 140 °C, for the evaporation stage provides for more time and better conditions for the diffusion of the solvent into the center of a droplet and a higher probability of forming a spherical particle.
Keywords:nanotehnology, ultrasonic spray pyrolysis, gold, aerosol, TEM microscopy
Publication status:Published
Publication version:Version of Record
Year of publishing:2015
Number of pages:str. 791-796
Numbering:Letn. 49, št. 5
PID:20.500.12556/DKUM-59280 New window
ISSN:1580-2949
UDC:669.21:620.3:537.533.35
ISSN on article:1580-2949
COBISS.SI-ID:18972438 New window
DOI:10.17222/mit.2014.264 New window
NUK URN:URN:SI:UM:DK:P73VDHHK
Publication date in DKUM:14.03.2017
Views:1786
Downloads:525
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
MAJERIČ, Peter, FRIEDRICH, Bernd and RUDOLF, Rebeka, 2015, Au-nanoparticle synthesis via ultrasonic spray pyrolysis with a separate evaporation zone. Materiali in tehnologije [online]. 2015. Vol. 49, no. 5, p. 791–796. [Accessed 15 March 2025]. DOI 10.17222/mit.2014.264. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=59280
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Record is a part of a journal

Title:Materiali in tehnologije
Shortened title:Mater. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1580-2949
COBISS.SI-ID:106193664 New window

Secondary language

Language:Slovenian
Title:Sinteza nanodelcev zlata z ultrazvočno razpršilno pirolizo z ločeno cono izhlapevanja
Abstract:Prispevek opisuje sintezo nanodelcev zlata, ki smo jo izvedli z modificirano ultrazvočno razpršilno pirolizo (USP) s ciljem postavitve čim bolj realnega teoretičnega modela. Pri prejšnjih eksperimentih sinteze nanodelcev zlata smo dobili nanodelce različnih oblik (sferične, trikotne, cilindrične, itd.), zato smo se pri tej raziskavi osredinili na izdelavo sferičnih nanodelcev. Morfološko različni nanodelci so ovira ne samo pri karakterizaciji, ampak tudi kasneje pri sami uporabi. Pri sintezi nanodelcev ima velik vpliv na končno morfologijo izhlapevanje kapljic aerosola. Za zagotovitev razmer za izhlapevanje kapljic, ki omogočajo nastanek sferičnih nanodelcev, smo v procesu USP uporabili ločeno ogrevalno območje in ločen vnos reakcijskega plina. Ta modifikacija namreč ločuje stopnjo izhlapevanja od stopenj reakcij za nastanek nanodelcev. Nižja temperatura v fazi izhlapevanja (med 60 °C in 140 °C) omogoča boljše razmere za difuzijo topljenca do središča kapljice in večjo verjetnost nastanka sferičnih nanodelcev.
Keywords:nanotehnologija, ultrazvočna razpršilna piroliza, zlato, aerosol, TEM-mikroskopija


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