Fabrication of hollow SiO2 particles and artificial 3D lattice based on them.
Aysiena-Ekaterina P. Protopopova (Osipyan Institute of Solid State Physics of the RAS, Chernogolovka, Russia), Nadezhda S. Sukhinina, Vladimir M. Masalov, Aleksei V. Kaledin, Vladimir N. Kurlov, Gleb M. Katyba
Abstract
In recent years, hollow spherical silicon dioxide (SiO2) particles have found wide application in various fields. For example, as a catalytic nanoreactor, as container for drug delivery, as a thermal insulation material, as a substitute of titanium dioxide for fabrication of white pigment, etc. Hollow spherical SiO₂ particles can be synthesized with diameters in the wide range of 100–1000 µm and featured by ecological purity and biological compatibility. Moreover, the THz optical properties of synthesize structures could be tuned in frame of the effective medium approximation by varying the morphology and sized of single particles. Within this research, we (i) created polymethyl methacrylate (PMMA) templates using the method of soap-free emulsion polymerization; (ii) created core-shell particles based on the PMMA templates and a silica coating; (iii) removed the templates to obtain hollow SiO2 nanospheres; (iv) produced artificially ordered lattice from hollow spherical silica particles (HSSP) by natural sedimentation methods and studied their optical properties in the THz frequency range. We suppose that studied structures could be used as a material platform for THz planar waveguides.
Speaker
Aysiena-Ekaterina Protopopova
Osipyan Institute of Solid State Physics of the RAS
Russia
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