Surface phonons and alloying effects in (CdS)x(CdSe)1−x nanospheres

Mlayah, Adnen; Brugman, A.; Carles, R.; Renucci, J. B.; Valakh, M. Ya.; Pogorelov, Alexei V.

doi:10.1016/0038-1098(94)90122-8

Cited by 77 publications

(88 citation statements)

References 15 publications

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“…In all cases the spectra exhibit a typical two-mode behaviour with distinct longitudinal optical selenide-like LO 1 and sulphide-like LO 2 phonon peaks. For the samples, obtained at the least intense heat treatment, the LO phonon frequencies agree well with the values obtained earlier for the glass-embedded CdS 1-x Se x NCs [3,4,[6][7][8][9]. With the increase of the heat treatment temperature and duration the observed LO phonon frequencies increase as well as those of the two-phonon bands.…”

supporting

confidence: 89%

“…The observed LO peak frequencies correspond to the average NC composition over the NCs involved in the scattering. The asymmetric shape of the LO phonon bands in Cd 1-y Zn y S 1-x Se x NCs is, similarly to CdS 1-x Se x [4,[6][7][8], is explained by a marked contribution from surface phonons in NCs due to the high surface-to-volume ratio as well as (to a less extent) by nonzero-wavevector LO phonons participating in the Raman scattering due to the confinementrelated selection rules relaxation in the NCs.…”

mentioning

confidence: 86%

“…For ternary II-VI NCs which have been extensively studied by vibrational spectroscopy with an emphasize on nanometer-size-related effects (phonon confinement, marked contribution of surface phonons due to the high surface-tovolume ratio, size dispersion of NCs within the ensemble) [3][4][5][6][7][8][9][10][11][12]. With regard to quaternary II-VI NCs, their studies are extremely scarce [13].…”

mentioning

confidence: 99%

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Phonon spectra of quaternary Cd_1–yZn_y S_1–xSe_x semiconductor nanocrystals grown in a glass matrix

Azhniuk

Milekhin

Gomonnai

et al. 2009

Phys. Status Solidi (c)

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Quaternary Cd1–y Zny S1–x Sex nanocrystals are obtained in a borosilicate glass matrix by solid‐state precipitation at temperatures within 625 to 700 °C. Raman spectroscopy is applied to determine the nanocrystal composition and to show its dependence on the heat treatment temperature and duration. Diffusion‐induced migration of Zn ions from the matrix to the NCs results in its content increase up to ∼20% at the heat treatment; meanwhile for Se‐rich NCs an increase of Se content is also observed. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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confidence: 89%

mentioning

confidence: 86%

mentioning

confidence: 99%

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Phonon spectra of quaternary Cd_1–yZn_y S_1–xSe_x semiconductor nanocrystals grown in a glass matrix

Azhniuk

Milekhin

Gomonnai

et al. 2009

Phys. Status Solidi (c)

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“…However, as the surface-to-volume ratio is large for nanostructured materials, it is possible to observe the SP mode by Raman scattering measurements. [33][34] The surface roughness as well as the crystal size also play important roles in modifying the Raman spectra. Therefore, Raman scattering has become a unique probe for the study of nanomaterials.…”

Section: Raman Scattering Of Pbs Nanowiresmentioning

confidence: 99%

Orthogonal PbS Nanowire Arrays and Networks and Their Raman Scattering Behavior

Wang

Zhang

et al. 2005

Chemistry A European J

132

105

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Three-dimensional, orthogonal lead sulfide (PbS) nanowire arrays and networks have been prepared by using a simple, atmospheric pressure chemical vapor deposition (APCVD) method. These uniform nanowires (average diameter 30 nm) grow epitaxially from the surface of the initial PbS crystal seeds and form orthogonal arrays and networks in space. The growth mechanism has been explored, and the process was classified as homogeneous, epitaxial growth in the 200 directions. Furthermore, Raman spectra of PbS nanowires are reported here, and their characteristic Raman peak (190 cm(-1), no shoulder) could be used as a unique probe for the study of PbS nanomaterials.

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“…[1][2][3][4][5][6][7][8][9][10]). From the difference of CdS-like and CdSe-like LO phonon frequencies in this two-mode system one can judge upon the average nanocrystal composition [1-4, 8, 9] while the acoustic phonon spectra provide information about the nanocrystal size [5][6][7].…”

mentioning

confidence: 99%

Phonon spectroscopy of CdSe_1–xTe_x nanocrystals grown in a borosilicate glass

Azhniuk

Hutych

Lopushansky

et al. 2009

Phys. Status Solidi (c)

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Phonon spectra of CdSe1–x Tex nanocrystals grown in a borosilicate glass matrix, are studied by Raman spectroscopy. The experimental data are compared to those obtained by other authors for bulk and nanoscale CdSe1–x Tex. With the account of the factors specific for glass‐embedded nanocrystals, Raman spectroscopy is shown to be a reliable and non‐destructive method to evaluate the ternary nanocrystal composition. Raman measurements performed at different excitation wavelengths enabled the compositional dispersion of the nanocrystals to be estimated. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Surface phonons and alloying effects in (CdS)x(CdSe)1−x nanospheres

Cited by 77 publications

References 15 publications

Phonon spectra of quaternary Cd_1–yZn_y S_1–xSe_x semiconductor nanocrystals grown in a glass matrix

Phonon spectra of quaternary Cd_1–yZn_y S_1–xSe_x semiconductor nanocrystals grown in a glass matrix

Orthogonal PbS Nanowire Arrays and Networks and Their Raman Scattering Behavior

Phonon spectroscopy of CdSe_1–xTe_x nanocrystals grown in a borosilicate glass

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Surface phonons and alloying effects in (CdS)x(CdSe)1−x nanospheres

Cited by 77 publications

References 15 publications

Phonon spectra of quaternary Cd1–yZny S1–xSex semiconductor nanocrystals grown in a glass matrix

Phonon spectra of quaternary Cd1–yZny S1–xSex semiconductor nanocrystals grown in a glass matrix

Orthogonal PbS Nanowire Arrays and Networks and Their Raman Scattering Behavior

Phonon spectroscopy of CdSe1–xTex nanocrystals grown in a borosilicate glass

Contact Info

Product

Resources

About

Phonon spectra of quaternary Cd_1–yZn_y S_1–xSe_x semiconductor nanocrystals grown in a glass matrix

Phonon spectra of quaternary Cd_1–yZn_y S_1–xSe_x semiconductor nanocrystals grown in a glass matrix

Phonon spectroscopy of CdSe_1–xTe_x nanocrystals grown in a borosilicate glass