Abstract
By the method of rapid radiation heating (at a speed of 20-25 K/s) of Au and Ag films with a thickness of 4-35 nm to temperatures of 573-693 K in air and in the process of vacuum deposition of silver on heated (up to 700 K at a heating rate of 10 K/s ) glass substrates formed Au and Ag NPs arrays with nanoparticle sizes from several tens to hundreds of nanometers, the position λSPR of which is in the range of 520-597 nm for Au NPs and 424-509 nm for Ag NPs. It is established that the average size of nanoparticles depends on the thickness of gold and silver films and the annealing temperature. The results testify that glass substrates with arrays of randomly distributed gold NPs can be used as effective SERS-substrates for the investigation of Raman spectra of nanosized (50-100 nm) chalcogenide films.
Highlights
Vasyl Stefanyk Precarpathian National UniversityФІЗИКА І ХІМІЯ ТВЕРДОГО ТІЛА Т. 22, No 4 (2021) С. 804-810 Фізико-математичні науки. V.M
The disordered and ordered arrays of nanoparticles of precious metals of a certain size and shape are widely used to enhance various physical phenomena
In [5, 6, 9] it was shown that disordered Au NPs arrays can be formed by thermal annealing of thin nano-sized gold films in air, and the average size of nanoparticle and optical properties of arrays depend on the nominal thickness of gold films and annealing temperature
Summary
ФІЗИКА І ХІМІЯ ТВЕРДОГО ТІЛА Т. 22, No 4 (2021) С. 804-810 Фізико-математичні науки. V.M. Rapid formation methods of arrays of randomly distributed Au and Ag nanoparticles, their morphologies and optical characteristics. Techniques and equipment for rapid formation of disordered arrays of Au and Ag nanoparticles (NPs) with specified morphology and optical characteristics have been developed. By the method of rapid (30-60 s) radiation heating of gold and silver films (4-35 nm of thickness) to temperatures about 573-693 K, arrays of Au and Ag NPs with the dimensions from several tens to hundreds of nanometers has been received, and the position of the maximum of the surface plasmon resonance band (λSPR) which is in the range of 520-597 nm for Au and 424-509 nm for Ag. It is established that the average size of nanoparticles depends on the thickness of gold and silver films and on the annealing temperature.
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