Srečko Stopić (Author), Rebeka Rudolf (Author), Jelena Bogovic (Author), Peter Majerič (Author), Miodrag Čolić (Author), Sergej Tomić (Author), Monika Jenko (Author), Bernd Friedrich (Author)

Abstract

Golden nanoparticles of different sizes and shapes (spherical, cylindrical, triangular and round) where prepared during a synthesis of gold with ultrasonic spray pyrolysis (USP) and hydrogen reduction. The experimental investigations of the (USP) method were performed with an ultrasonic source of 0.8 MHz and 2.5 MHz, acting on the water solution of HAuCl4 forming aerosols with micron-sized and nanosized droplets. The results of the investigation show that the final shape and size of the Au particles depend on the characteristics of the solution and the frequency of the ultrasound. The second step of synthesizing the Au nanoparticles includes the subsequent thermal decomposition of the aerosol droplets in a hydrogen atmosphere between 260°C and 500°C. The investigations showed that the Au nanoparticles prepared in this way are smaller and more homogeneous.

Keywords

gold;ultrasonic spray pyrolysis;reduction;nanoparticles;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: IMT - Institute of Metals and Technology
Publisher: Inštitut za kovinske materiale in tehnologije Ljubljana
UDC: 669.21:620.3:66.017
COBISS: 17274390 Link will open in a new window
ISSN: 1580-2949
Views: 1200
Downloads: 68
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Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary title: Sinteza Au-nanodelcev, pripravljenih z ultrazvočno razpršilno pirolizo in redukcijo z vodikom
Secondary abstract: Zlate nanodelce različnih velikosti in oblik (sferični, cilindrični, trikotni in okrogli) smo pripravili s sintezo zlata z uporabo ultrazvočne razpršilne pirolize (USP) in redukcije. Eksperimentalne raziskave USP-metode so bile izvedene z ultrazvočnim izvirom s frekvenco med 0,8 MHz in 2,5 MHz z delovanjem na vodno raztopino HAuCl4, kjer je prišlo do formiranja aerosolov z mikro- in nanovelikostjo kapljic. Rezultati preiskav kažejo, da je oblika in velikost nastalih Au-delcev odvisna od karakteristik raztopine in od frekvence ultrazvoka. Drugi proces sinteze Au-nanodelcev je vključeval kasnejšo toplotno dekompozicijo kapljic aerosola. Izveden je bil v vodikovi atmosferi med 260°C in 500°C. Preiskave so pokazale, da so tako izdelani Au-delci bolj homogeni in manjši.
Secondary keywords: zlato;ultrazvočna razpršilna piroliza;redukcija;nanodelci;
URN: URN:NBN:SI
Type (COBISS): Scientific work
Pages: str. 577-583
Volume: ǂLetn. ǂ47
Issue: ǂšt. ǂ5
Chronology: sep.-okt. 2013
ID: 9110781