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Jelen Z.♦, Krajewski M., Zupanič F.♦, Majerič P.♦, Švarc T.♦, Anžel I.♦, Ekar J.♦, Liou S.♦, Kubacki J.♦, Tokarczyk M.♦, Rudolf R.♦, Melting point of dried gold nanoparticles prepared with ultrasonic spray pyrolysis and lyophilisation,
nanotechnology reviews, ISSN: 2191-9097, DOI: 10.1515/ntrev-2022-0568, Vol.12, No.1, pp.1-12, 2023 Abstract:
A coupled process of ultrasonic spray pyrolysis and lyophilisation was used for the synthesis of dried gold nanoparticles. Two methods were applied for determining their melting temperature: uniaxial microcompression and differential scanning calorimetry (DSC) analysis. Uniaxial microcompression resulted in sintering of the dried gold nanoparticles at room temperature with an activation energy of 26–32.5 J/g, which made it impossible to evaluate their melting point. Using DSC, the melting point of the dried gold nanoparticles was measured to be around 1064.3°C, which is close to pure gold. The reason for the absence of a melting point depression in dried gold nanoparticles was their exothermic sintering between 712 and 908.1°C. Keywords:
gold nanoparticles, melting point, ultrasonic spray pyrolysis, characterisation Affiliations:
| Jelen Z. | - | other affiliation | | Krajewski M. | - | IPPT PAN | | Zupanič F. | - | other affiliation | | Majerič P. | - | other affiliation | | Švarc T. | - | other affiliation | | Anžel I. | - | other affiliation | | Ekar J. | - | other affiliation | | Liou S. | - | University of Maryland (US) | | Kubacki J. | - | Silesian University of Technology (PL) | | Tokarczyk M. | - | University of Warsaw (PL) | | Rudolf R. | - | other affiliation |
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