Raman study of colloidal CuZnSnS nanocrystals obtained by "green" synthesis modified by seed nanocrystals or extra cations in the solution.

The method of affordable colloidal synthesis of nanocrystalline CuZnSnS (CZTS) is developed, which is suitable for obtaining bare CZTS nanocrystals (NCs), cation substituted CZTS NCs, and CZTS-based hetero-NCs. For the hetero-NCs, the synthesized in advance NCs of another material are introduced into the reaction solution so that the formation of CZTS takes place preferably on these "seed" NCs. Raman spectroscopy is used as the primary method of structural characterization of the NCs in this work because it is very sensitive to the CZTS structure and allows to probe NCs both in solutions and films.

Core and Shell Contributions to the Phonon Spectra of CdTe/CdS Quantum Dots.

The parameters of the shell and interface in semiconductor core/shell nanocrystals (NCs) are determinant for their optical properties and charge transfer but are challenging to be studied. Raman spectroscopy was shown earlier to be a suitable informative probe of the core/shell structure. Here, we report the results of a spectroscopic study of CdTe NCs synthesized by a facile route in water, using thioglycolic acid (TGA) as a stabilizer.

Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study.

Cu-Zn-Sn-Te (CZTTe) is an inexpensive quaternary semiconductor that has not been investigated so far, unlike its intensively studied CZTS and CZTSe counterparts, although it may potentially have desirable properties for solar energy conversion, thermoelectric, and other applications. Here, we report on the synthesis of CZTTe nanocrystals (NCs) via an original low-cost, low-temperature colloidal synthesis in water, using a small-molecule stabilizer, thioglycolic acid. The absorption edge at about 0.

Synthesis, Structural, Thermal, and Electronic Properties of Palmierite-Related Double Molybdate α-CsPb(MoO).

CsPb(MoO) crystals were prepared by crystallization from their own melt, and the crystal structure has been studied in detail. At 296 K, the molybdate crystallizes in the low-temperature α-form and has a monoclinic palmierite-related superstructure (space group C2/m, a = 2.13755(13) nm, b = 1.

[A method for early diagnosis of cholelithiasis].

A method for early diagnosis of cholelithiasis on a basis of the hemagglutination inhibition reaction has been suggested. A method is realized in interaction of a specific agglutinogen obtained from lithogenic bile with the human blood serum and erythrocytes of white mongrel rats. It was established that agglutinogen is a protein with a low molecular mass of 55,000-75,000.