Changes in the structure of gold nanoparticles on the tungsten surface caused by heating
P.A. Dementev, M.N. Lapushkin
Abstract: The formation of gold nanoparticles on the tungsten surface and the effect of heating on their structure are studied. It was found that the thermal deposition of gold atoms on the tungsten surface at room temperature leads to formation of randomly located nanoparticles. The average area of nanoparticles is 10210 nm2. Heating for 30 minutes at a temperature of 600K leads to the fusion of nanoparticles, which is reflected in an increase in the average area of nanoparticles to 19520 nm2. Further heating for 30 minutes at temperature 600K did not lead to an increase in the average area of nanoparticles. An analysis of the shape of the nanoparticles showed that they are elongated ellipsoids. Unheated nanoparticles have a semi-major axis of 110 ± 30 nm and eccentricity 1,5 ± 0,4. Heating of gold nanoparticles leads to an increase in the semi-major axis to 200 ± 120 nm and an eccentricity to 1,8 ± 0,6. It is shown that the nanoparticles after heating become a cropped ellipsoid.
Keywords: nanoparticles, atomic force microscopy, surface topography, gold, tungsten
- Petr A. Dementev – Junior Researcher Ioffe Institute
- Mikhail N. Lapushkin – Ioffe Institute
Dementev, P.A. Changes in the structure of gold nanoparticles on the tungsten surface caused by heating / P.A. Dementev, M.N. Lapushkin // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. – Tver: TSU, 2020. — I. 12. — P. 53-60. DOI: 10.26456/pcascnn/2020.12.053. (In Russian).
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