scholarly journals Raman characterization of Cu2ZnSnS4 nanocrystals: phonon confinement effect and formation of CuxS phases

RSC Advances ◽  
2018 ◽  
Vol 8 (54) ◽  
pp. 30736-30746 ◽  
Author(s):  
Ye. Havryliuk ◽  
M. Ya. Valakh ◽  
V. Dzhagan ◽  
O. Greshchuk ◽  
V. Yukhymchuk ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Green Synthesis ◽  
Spectroscopic Study ◽  
Phonon Confinement ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Raman Characterization ◽  
Phonon Confinement Effect ◽  
Czts Nanocrystals

A Raman spectroscopic study of Cu2ZnSnS4 (CZTS) nanocrystals (NCs) produced by a “green” synthesis in aqueous solutions is reported.

Raman Spectroscopic Study of the Ion Association of Lithium Sulfate Aqueous Solutions

1995 ◽  
Vol 50 (2-3) ◽  
pp. 292-300 ◽  
Author(s):  
Fernando Rull
Keyword(s):  
Aqueous Solutions ◽  
Spectroscopic Study ◽  
Association Constant ◽  
Profile Analysis ◽  
Dynamic Properties ◽  
Ion Association ◽  
Sulfate Ions ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Band Profile

Abstract A Raman spectroscopic study of Li2SO4 aqueous solutions as function of concentration and temperature was performed. The dynamic properties of the sulfate ions were studied by a band profile analysis of their internal modes using Fourier transform methods. This analysis reveals the perturbation of the SO4-2 vibrations due to ionic interactions. From the v1 (SO4-2) band profile the spectroscopic ionic association constant was calculated in the range from 5 to 80 °C. The large difference found between the values thus obtained for the association constant and the values obtained from macroscopic measurements is interpreted, assuming that Raman spectra reflect only the short-range forces acting on the ions. Using the Bjerrum equation to calculate the contribution for the long-range forces, good agreement is found between the spectroscopic and macroscopic results.

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