Рефлектометричнi дослiдження нанопористих плiвок з масивом наночастинок золота

• Date: 2018
• Main Authors: Kladko, V. P., Gudymenko, O. Y., Kriviy, S. B., Litvin, P. M., Kaganovich, E. B., Krishchenko, I. M., Manoilov, E. G.
• Format: Article
• Language: English; Ukrainian
• Published: Publishing house "Academperiodika" 2018
• Subjects: плазмонiка; нанокомпозитнi плiвки; наночастинки золота; метод iмпульсного лазерного осадження; пористiсть плiвки; рентгенiвська рефлектометрiя
• Online Access: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018528
• Journal Title: Ukrainian Journal of Physics

The influence of conditions occurring at the pulsed laser deposition of films with gold nanoparticles on the film porosity has been studied, by using the X-ray reflectometry. The films of two types were obtained by depositing particles (i) from the direct high-energy flow of erosion-torch particles and (ii) from the backward low-energy one. In both cases, the films were deposited either at the residual air pressure p = 10^−2 Pa or in the argon atmosphere with the pressures pAr = 5–100 Pa. In case (i), the film porosity was 0.1% at p = 10^−2 Pa and 1% at pAr ≤ 5 Pa. The plasmon properties of those films are associated with the propagation of surface plasmon-polariton waves. As the argon pressure grew further up to 100 Pa, the porosity increased to approximately 30%. In case (ii), the porosity of films deposited at pAr = 5–100 Pa onto substrates located in the target plane equaled 30 to 70% and depended on the distance from the film to the torch axis. All films with the porosity higher than 20% turned out nanocomposite structures with arrays of gold nanoparticles, which enabled us to observe the excitation of local surface plasmons.