Synthesis, nanocrystalline morphology, lattice dynamics and nonlinear optics of mesoporous SiO&LiNbO nanocomposite.

We demonstrate a hybrid nanocomposite combining mesoporous silica, p , as a host medium and guest lithium niobate nanocrystals embedded into tubular silica nanochannels by calcination of the precursor mixed solution of lithium and niobium salts. High-resolution transmission electron microscopy, X-ray diffraction and Raman scattering techniques reveal trigonal nanocrystals within the p nanochannels, indicating their random texture morphology. Annealing at high temperatures ( 950 C) during calcination also leads to partial crystallization of the p matrix with the formation of trigonal - nanocrystals.

Nanoarhitectonics of Inorganic-Organic Silica-Benzil Composites: Synthesis, Nanocrystal Morphology and Micro-Raman Analysis.

The synthesis of nanosized organic benzil (C6H5CO)2 crystals within the mesoporous SiO2 host matrix was investigated via X-ray diffraction, transmission electron microscopy, Raman spectroscopy, and lattice dynamics analysis. Combining these methods, we have proved that the main structural properties of benzil nanocrystals embedded into SiO2 host membranes with pore diameters of 6.0, 7.

Scale-up synthesis of high-quality solid-state-processed CsCuX (X = Cl, Br, I) perovskite nanocrystal materials toward near-ultraviolet flexible electronic properties.

High-quality CsCuX and CsCuX (X = Cl, Br, I) nanocrystals (NCs) exhibit excellent optoelectronic, physical, and chemical properties for detection of UV radiation due to large carrier mobility and lifetime, and heavy atoms. The nanocrystal materials can be prepared a low-cost and simple solid-state synthesis. However, poor reproducibility and complex synthesis methods of obtaining perovskite NC thin films represent a drawback for the fabrication of the commercial photoelectric device.

Microwave characterization of aqueous amino acid solutions using the multifrequency WGM resonator technique.

Amino acids play essential role for humans. We studied the dielectric properties of the basic aliphatic amino acids and polar positive amino acids in solutions of different concentrations. The high-Q single microwave whispering gallery-mode (WGM) quartz dielectric resonator based technique, enhanced to a number of measurement frequencies, was applied.

On the issue of textured crystallization of Ba(NO) in mesoporous SiO: Raman spectroscopy and lattice dynamics analysis.

The lattice dynamics of preferentially aligned nanocrystals formed upon drying of aqueous Ba(NO) solutions in a mesoporous silica glass traversed by tubular pores of approximately 12 nm are explored by Raman scattering. To interpret the experiments on the confined nanocrystals polarized Raman spectra of bulk single crystals and X-ray diffraction experiments are also performed. Since a cubic symmetry is inherent to Ba(NO), a special Raman scattering geometry was utilized to separate the phonon modes of A and E species.