Raman scattering study in bio-conjugated core-shell CdSe/ZnS quantum dots

By using the numerical discretization method within the effective-mass approximation, we have theoretically investigated the exciton-related Raman scattering, interband absorption and photoluminescence in colloidal CdSe/CdS core/shell quantum dots ensemble. The interband optical absorption and photoluminescence spectra have been revealed for CdSe/CdS quantum dots, taking into account the size dispersion of the ensemble. Numerical calculation of the differential cross section has been presented for the exciton-related Stokes–Raman scattering in CdSe/CdS quantum dots ensemble with different mean sizes.

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A Raman scattering study of self-assembled pure isotope Ge/Si(100) quantum dots

Applied Physics Letters ◽

10.1063/1.1521261 ◽

2002 ◽

Vol 81 (20) ◽

pp. 3855-3857 ◽

Cited By ~ 21

Author(s):

A. V. Kolobov ◽

K. Morita ◽

K. M. Itoh ◽

E. E. Haller

Keyword(s):

Quantum Dots ◽

Raman Scattering ◽

Scattering Study ◽

Self Assembled

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Resonant Raman scattering of ZnS, ZnO, and ZnS/ZnO core/shell quantum dots

Applied Physics A ◽

10.1007/s00339-012-6880-z ◽

2012 ◽

Vol 107 (2) ◽

pp. 275-278 ◽

Cited By ~ 22

Author(s):

A. G. Milekhin ◽

N. A. Yeryukov ◽

L. L. Sveshnikova ◽

T. A. Duda ◽

C. Himcinschi ◽

...

Keyword(s):

Quantum Dots ◽

Raman Scattering ◽

Core Shell ◽

Resonant Raman ◽

Resonant Raman Scattering

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Raman Spectrum Modification of CdSe/ZnS Quantum Dots at the Bio-conjugation to IgG Antibodies

MRS Proceedings ◽

10.1557/opl.2012.161 ◽

2012 ◽

Vol 1371 ◽

Cited By ~ 1

Author(s):

A. I. Diaz Cano ◽

J. Douda ◽

C. R. Gonzalez Vargas ◽

K. Gazarian

Keyword(s):

Quantum Dots ◽

Raman Scattering ◽

Raman Spectra ◽

Pseudorabies Virus ◽

Core Shell ◽

Igg Antibodies ◽

Si Substrate ◽

Scattering Spectra ◽

Raman Scattering Spectra ◽

Color Emission

ABSTRACTThe paper presents the analysis of Raman scattering spectra of non-conjugated and bio-conjugated CdSe/ZnS core–shell quantum dots in the range of Raman shifts of 80 - 2000 cm-1. Commercial CdSe/ZnS QDs covered by polymer and characterized by color emission with the maxima at 605 and 655 nm (1.89 and 2.04 eV) were used. Raman scattering spectra were measured at 300K and the excitation by the line 785.0 nm of a solid state LED. The analysis of Raman spectra has shown that the QD bio-conjugation to the immunoglobulin G (IgG) antibodies of the Pseudorabies virus is accompanied by the changes of the intensity of Raman lines related to the CdSe/ZnS core/shell QDs, PEG polymer covered QDs, the Si substrate and/or some organic groups of antibody molecules. The comparison of Raman spectra of CdSe/ZnS QDs with different sizes in non-conjugated and bio-conjugated states gives the opportunity to detect the bio-conjugation without mistake.

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The strong dependence of the bi-functionalities of core–shell-like gold-based nanocomposites on the size of gold nanoparticles

Journal of Materials Chemistry C ◽

10.1039/c7tc03831c ◽

2017 ◽

Vol 5 (44) ◽

pp. 11411-11415 ◽

Cited By ~ 1

Author(s):

Lixia Qin ◽

Jiefei Liu ◽

Shi-Zhao Kang ◽

Guodong Li ◽

Xiangqing Li

Keyword(s):

Quantum Dots ◽

Gold Nanoparticles ◽

Raman Scattering ◽

Strong Dependence ◽

Graphene Quantum Dots ◽

Core Shell ◽

Surface Enhanced ◽

Surface Enhanced Raman ◽

Enhanced Raman Scattering ◽

Scattering Response

Gold nanoparticles of various sizes were facially assembled with a glycine derivative and graphene quantum dots, respectively. The obtained gold-based composites showed a strong dependence of fluorescence and surface enhanced Raman scattering response on the size of the AuNPs.

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Raman Scattering Study for Self-Organized Ge Quantum Dots Formed on Si Substrate

MRS Proceedings ◽

10.1557/proc-744-m2.11 ◽

2002 ◽

Vol 744 ◽

Author(s):

T. R. Yang ◽

M. M. Dvoynenko ◽

Z. C. Feng ◽

I. Ferguson ◽

H. H. Cheng

Keyword(s):

Quantum Dots ◽

Raman Spectroscopy ◽

Raman Scattering ◽

Layer Thickness ◽

Line Width ◽

Wetting Layer ◽

Si Substrate ◽

Spectroscopy Technique ◽

Self Organized ◽

Scattering Study

ABSTRACTA Raman scattering study for self-organized Ge dots on Si substrate is presented. Raman signals from the Ge islands and Si substrate have been separated, by means of difference Raman spectroscopy technique. The wetting layer thickness and strain were estimated from the line width and the position of the peak. The estimated wetting layer thickness values are comparative with the Ge dot height obtained from microscopy measurements. As explained, the strain is observed to decrease with an increase of the Ge island height and the wetting layer thickness.

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