scholarly journals Exciton-Related Raman Scattering, Interband Absorption and Photoluminescence in Colloidal Cdse/Cds Core/Shell Quantum Dots Ensemble

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1274
Author(s):  
Grigor A. Mantashian ◽  
Paytsar A. Mantashyan ◽  
Hayk A. Sarkisyan ◽  
Eduard M. Kazaryan ◽  
Gabriel Bester ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Raman Scattering ◽  
Cross Section ◽  
Core Shell ◽  
Interband Absorption ◽  
Photoluminescence Spectra ◽  
Cds Quantum Dots ◽  
Mass Approximation ◽  
Numerical Discretization ◽  
Size Dispersion

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.

scholarly journals Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+ doped CdS quantum dots

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 7961-7971
Author(s):  
N. D. Vinh ◽  
P. M. Tan ◽  
P. V. Do ◽  
S. Bharti ◽  
V. X. Hoa ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Dopant Concentration ◽  
Core Shell ◽  
Cds Quantum Dots ◽  
Cds Qds

The role of samarium (Sm) dopant on the structural, morphological, and optical properties of CdS QDs and CdS/ZnS core/shell QDs was methodically reported.

EXCITON-MEDIATED RAMAN SCATTERING IN ONE-DIMENSIONAL QUANTUM DOTS

2011 ◽  
Vol 25 (32) ◽  
pp. 4387-4393 ◽  
Author(s):  
HAI-CHAO SUN ◽  
CUI-HONG LIU
Keyword(s):  
Quantum Dots ◽  
Differential Cross Section ◽  
Raman Scattering ◽  
Cross Section ◽  
Differential Cross ◽  
Semiconductor Quantum Dots ◽  
Scattering Process ◽  
One Dimensional ◽  
Intermediate States ◽  
Potential Frequency

The differential cross section (DCS) for exciton-mediated Raman scattering (EMRS) in one-dimensional semiconductor quantum dots is presented. The exciton states are considered as intermediate states in the Raman scattering process. The selection rules for the EMRS process are studied. The numerical results show that the contribution to DCS indicated by exciton is larger than that by electron. DCS of EMRS is larger when there is a bigger confinement potential frequency.

Fluorescent glucose sensing using CdTe/CdS quantum dots–glucose oxidase complex

2016 ◽  
Vol 8 (14) ◽  
pp. 2967-2970 ◽  
Author(s):  
Liyun Ding ◽  
Bingyu Zhang ◽  
Chuang Xu ◽  
Jun Huang ◽  
Zhilin Xia
Keyword(s):  
Quantum Dots ◽  
Glucose Oxidase ◽  
Fluorescence Probe ◽  
Glucose Sensing ◽  
Core Shell ◽  
Glucose Detection ◽  
Cds Quantum Dots ◽  
The Core

The core/shell quantum dots–glucose oxidase complex has been synthesized and proved as a potential fluorescence probe for glucose detection.

Synthesis and optical properties of emission-tunable PbS/CdS core–shell quantum dots for in vivo fluorescence imaging in the second near-infrared window

RSC Advances ◽  
2014 ◽  
Vol 4 (77) ◽  
pp. 41164-41171 ◽  
Author(s):  
Yoshikazu Tsukasaki ◽  
Masatoshi Morimatsu ◽  
Goro Nishimura ◽  
Takao Sakata ◽  
Hidehiro Yasuda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Fluorescence Imaging ◽  
Near Infrared ◽  
Core Shell ◽  
Cds Quantum Dots ◽  
In Vivo Fluorescence ◽  
In Vivo Fluorescence Imaging ◽  
Infrared Window

This paper describes the synthesis and optical properties of PbS/CdS quantum dots for in vivo fluorescence imaging.

Electronic Structure of CdSe/CdXZn1-XS Core/Shell Quantum Dots

2011 ◽  
Vol 284-286 ◽  
pp. 2037-2040
Author(s):  
Guo Zhi Jia ◽  
Yun Feng Wang ◽  
Jiang Hong Yao
Keyword(s):  
Quantum Dots ◽  
Electronic Structure ◽  
Kinetic Energy ◽  
Electronic Structures ◽  
Band Offset ◽  
Core Shell ◽  
Structure Parameters ◽  
Transition Energies ◽  
Mass Approximation ◽  
Energy Band Offset

The electronic structures of CdSe/CdxZn1-xS core/shell quantum dots are investigated systematically using the effective-mass approximation method. The calculated results have shown that both of the electron and hole are completely localized at the range of core, which can be ascribed to the large energy band offset in valence band and conduction band. The carriers appear in the region of core or shell, which mainly depend on the competition between the kinetic energy and the potential energy in the heterostrucuture QDs. The transition energies can be widely tuned by the changing the structure parameters.

scholarly journals Utilizing Cation Exchange Method to Produce Core/Shell PbS/CdS Quantum Dots with Stable Infrared Emission

2013 ◽  
Vol 71 (06) ◽  
pp. 929
Author(s):  
Qian Li ◽  
Teng Zhang ◽  
Hongwei Gu ◽  
Fazhu Ding ◽  
Fei Qu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cation Exchange ◽  
Infrared Emission ◽  
Core Shell ◽  
Cds Quantum Dots ◽  
Exchange Method

Surface enhanced Raman scattering by CdS quantum dots

JETP Letters ◽  
2008 ◽  
Vol 88 (12) ◽  
pp. 799-801 ◽  
Author(s):  
A. G. Milekhin ◽  
L. L. Sveshnikova ◽  
T. A. Duda ◽  
N. V. Surovtsev ◽  
S. V. Adichtchev ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Cds Quantum Dots ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

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

2012 ◽  
Vol 107 (2) ◽  
pp. 275-278 ◽  
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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