Compositional dependence of the Raman lineshapes in GaSxSe1-x layered mixed crystals

2005-09-01
The Raman spectra of GaSxSe1-x layered mixed crystals were studied for a wide range of composition (0 <= x <= 1) at 300 and 10 K. The effect of crystal disorder on the linewidth broadening of shear and compressional modes is discussed. The asymmetry in the Raman lineshape was analyzed for intralayer modes exhibiting one-mode behavior. Copyright (c) 2005 John Wiley & Sons, Ltd.
JOURNAL OF RAMAN SPECTROSCOPY

Suggestions

Surface-enhanced Raman scattering spectroscopy via gold nanostars
Nalbant Esentürk, Emren (Wiley, 2009-01-01)
Anisotropic metallic nanoparticles (NPs) have unique optical properties, which lend them to applications such as surface-enhanced Raman scattering (SERS) spectroscopy. Star-shaped gold (Au) NPs were prepared in aqueous solutions by the seed-mediated growth method and tested for Raman enhancement using 2-mercaptopyridine (2-MPy) and crystal violet (CV) probing molecules. For both molecules, the SERS activity of the nanostars was notably stronger than that of the spherical Au NPs of similar size. The Raman en...
Composition dependency of lattice anisotropy of TlBX2-type chain mixed crystals
Hasanlı, Nızamı; Tas, M (Wiley, 2000-01-01)
Variation of the lattice parameters of TlTl1-xInxSe2 chain mixed crystals with composition have been studied by X-ray diffraction technique. The lattice anisotropy (c/a) of the TlBX2-type mixed crystals changes linearly with substitution of the atoms located bath at the center and at the vertices of the BX4 tetrahedra. A brief survey of the important features of the effect of isomorphic atom substitution on the lattice anisotropy of TlBX2-type mixed crystals with chain structure has been presented.
Temperature and excitation intensity tuned photoluminescence in Tl4GaIn3S8 layered single crystals
Golksen, K.; Hasanlı, Nızamı (Wiley, 2008-05-01)
Photoluminescence spectra of Tl4GaIn3S8 layered crystals grown by Bridgman method have been studied in the wavelength region of 500-780 nm and in the temperature range of 26-130 K with extrinsic excitation source (lambda(exc) = 532 nm), and at T = 26 K with intrinsic excitation source (lambda(exc) = 406 nm). Three emission bands A, B and C centered at 514 nm (2.41 eV), 588 nm (2.11 eV) and 686 nm (1.81 eV), respectively, were observed for extrinsic excitation process. Variations in emission spectra have bee...
Anharmonic line shift and linewidth of the Raman modes in TlInS2 layered crystals
Yuksek, NS; Hasanlı, Nızamı; Aydinli, A (Wiley, 2004-01-01)
The temperature dependence of the unpolarized Raman spectra from TlInS2 layered crystal was measured between 10 and 300 K. The analysis of the experimental data showed that the temperature dependences of wavenumbers and linewidths are well described by considering the contributions from thermal expansion and lattice anharmonicity. The purely anharmonic contribution (phonon-phonon coupling) was found to be due to three-phonon processes. This work demonstrates that the two Raman modes at 280.9 and 292.3 cm(-1...
Crystallization field and rate study for the formation of single phase sodium-potassium and potassium clinoptilolite
Guvenir, O.; Kalıpçılar, Halil; Culfaz, A. (Wiley, 2011-04-01)
Reproducible synthesis of clinoptilolite as the single crystalline phase was achieved in the narrow crystallization field at or around the nominal batch composition of 2.1(Na2O+K2O):Al2O3:10SiO(2):110H(2)O at 140 degrees C. Clinoptilolites of high purity were crystallized in the pure sodium or mixed sodium-potassium cation systems. Partial replacement of hydroxyl anions with the salts of carbonates or chlorides also yielded clinoptilolite as the single crystalline phase although at lower crystallization rat...
Citation Formats
N. Hasanlı, “Compositional dependence of the Raman lineshapes in GaSxSe1-x layered mixed crystals,” JOURNAL OF RAMAN SPECTROSCOPY, pp. 879–883, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35474.