Nanooptics and Nanophotonics

Golden Nanostructures in the Pores of Templates SiO2/Si
V.D. Bundyukova1*, E.Yu. Kaniukov1, D.V. Yakimchuk1, S.E.Demyanov1, 
V. Sivakov2
1Scientific-Practical Materials Research Centre NAS of Belarus. Brovky str. 19, Minsk-220072, Belarus. E-mail: victoria.bundyukova@gmail.com
2Leibniz Institute of Photonic Technology Jena, Albert-Einstein-Str. 9, 07745 Jena, Germany. 3Friedrich 3Schiller University Jena, Institute of Physical Chemistry and Abbe Center of Photonics, Helmholtzweg 4, 07745 Jena, Germany.

Gold nanostructures with different morphologies have been formed in the pores of a SiO2 template on single-crystal silicon substrate formed by ion-track technology. Formation mechanism of nanostructures with different shape has been established and parameters of tailored synthesis of golden nanostructures have been determined. It is shown that the process of self-organization of gold nanostructures in a limited volume depends on the rate of metal reduction, silicon oxidation, and silicon dioxide etching, and can be controlled both by the parameters of chemical deposition (electrolyte composition, temperature and deposition time), and by the parameters of the porous matrix (silicon substrate, geometric characteristics and surface density of pores). This allows to form a wide range of objects, including dendrites and nanostructures with various shapes. Study of the enhancement factor of the Raman signal on aqueous solution of Bilirubin showed the possibility of using gold nanostructures in pores of silicon dioxide to detect up to 10-6 M molecules of Bilirubin. Results indicates the possibility of using tailored synthesized golden nanostructures it pores of SiO2 template as plasmon-active substrates for surface-enhanced Raman scattering spectroscopy.

Fig. Scanning electron microscopy micrographs of self–organized gold nanostructures grown in porous SiO2/Si matrix depending on the pore diameter

1.	Kaniukov, E.Y., Ustarroz, J., Yakimchuk, D.V. et al. Nanoporous Silicon Oxide Templates by Swift Heavy Ion Tracks Technology // Nanotechnology.-2016.-27, P.115305.