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.

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.

scholarly journals Photoacoustic Study of CdS QDs for Application in Quantum-Dot-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
S. Abdallah ◽  
N. Al-Hosiny ◽  
Ali Badawi
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Solar Cells ◽  
Current Density ◽  
Cds Quantum Dots ◽  
Counter Electrodes ◽  
Redox Species ◽  
Cds Qds ◽  
Photovoltaic Characterization ◽  
Sensitized Solar Cells

The optical properties and photovoltaic characterization of CdS quantum dots sensitized solar cells (QDSSCs) were studied. CdS QDs were prepared by the chemical solution deposition (CD) technique. Photoacoustic spectroscopy (PA) was employed to study the optical properties of the prepared samples. The sizes of the CdS QDs were estimated from transmission electron microscope (TEM) micrographs gives radii ranged from 1.57 to 1.92 nm. The current density-voltage (J-V) characteristic curves of the assembled QDSSCs were measured. Fluorine doped Tin Oxide (FTO) substrates were coated with 20 nm-diameter TiO2nanoparticles (NPs). Presynthesized colloidal CdS quantum dots of different particles size were deposited on the TiO2-coated substrates using direct adsorption (DA) method. The FTO counter electrodes were coated with platinum, while the electroelectrolyte containingI-/I-3redox species was sandwiched between the two electrodes. The short current density (Jsc) and efficiency (η) increases as the particle size increases. The values ofJscincreases linearly with increasing the intensities of the sun light which indicates the greater sensitivity of the assembled cells.

scholarly journals Synthesis and optical properties of CdS quantum dots via paraffin liquid and oleic acid

2019 ◽  
Vol 14 (29) ◽  
pp. 169-174
Author(s):  
Zainab S. Sadeq
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Oleic Acid ◽  
Optimum Condition ◽  
Low Cost ◽  
Small Concentration ◽  
Cds Quantum Dots ◽  
Cds Qds ◽  
Paraffin Liquid

In this study, an easy, low-cost, green, and environmentallyfriendlier reagents have been used to prepare CdS QDs, in chemicalreaction method by mixed different ratio of CdO and sulfur inparaffin liquid as solvent and oleic acid as the reacting media indifferent concentration to get the optimum condition of the reactionto formation CdS QDs. The results give an indication that thebehavior is at small concentration of 4ml of the oleic acid is bestconcentration which give CdS QDs of small about to 9.23 nm withnano fiber configuration.

Low-Temperature Synthesis of Tetrapod CdSe/CdS Quantum Dots through Microfluidic Reactor

Nanoscale ◽  
2021 ◽  
Author(s):  
Weishuo Xing ◽  
Shuang Zhang ◽  
Ruoting An ◽  
Wengang Bi ◽  
Chong Geng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Cross Section ◽  
Synthesis Methods ◽  
Absorption Cross ◽  
Cds Quantum Dots ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Light Emitting ◽  
Cds Qds

Tetrapod CdSe/CdS quantum dots (QDs) attracted extensive research interest in light-emitting applications due to their anisotropic optical properties and large absorption cross section. Traditional synthesis methods for tetrapod CdSe/CdS QDs...

Aligning CdS Quantum Dots in Apo-Ferritin Protein and PS-b-P2VP Organic Templates

2013 ◽  
Vol 832 ◽  
pp. 675-680
Author(s):  
S.A. Shamsudin ◽  
Hirokazu Hasegawa ◽  
Mikihito Takenaka ◽  
Saijo Kenji
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Cancer Cells ◽  
Cadmium Sulphide ◽  
Cds Quantum Dots ◽  
Organic Templates ◽  
Ps I ◽  
Cds Qds ◽  
Guest System ◽  
Photo Stability

Quantum dots (QDs) have a great potential to be applied as a biosensor to detect cancer cells because of their properties such as high photoluminescence, photo stability, narrow peak of luminescence, etc. However, cadmium sulphide (CdS) quantum dots are toxic and hydrophobic, making it impossible to be applied into biomaterials. A template is needed to make CdS QDs nontoxic and hydrophilic. The optical properties of these QDs are needed to be protected. To achieve this purpose, the template for CdS QDs has been designed by capping CdS QDs with apo-ferritin shells before aligning them onto cylindrical perpendicular PS-b-P2VP template, with the aim of locating CdS QDs appropriately in sequence. A host-guest system can be developed.

Photoluminescence and optical nonlinearity of CdS quantum dots synthesized in a functional copolymer hydrogel template

2017 ◽  
Vol 41 (9) ◽  
pp. 3524-3536 ◽  
Author(s):  
Jolly Vakayil Antony ◽  
Jisha J. Pillai ◽  
Philip Kurian ◽  
V. P. N. Nampoori ◽  
George Elias Kochimoolayil
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Acrylic Acid ◽  
Acid Content ◽  
Nonlinear Optical ◽  
Optical Nonlinearity ◽  
Cds Quantum Dots ◽  
Copolymer Hydrogel ◽  
Cds Qds ◽  
Linear And Nonlinear

The acrylic acid content in the copolymer influences the size of the CdS QDs as well as the linear and nonlinear optical properties of the copolymer.

Role of surface ligands in optical properties of colloidal CdSe/CdS quantum dots

2011 ◽  
Vol 13 (13) ◽  
pp. 5848 ◽  
Author(s):  
Zhijun Ning ◽  
Matyas Molnár ◽  
Yun Chen ◽  
Peter Friberg ◽  
Liming Gan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Cds Quantum Dots ◽  
Surface Ligands

The role of the surface ligand in the optical properties of CdS quantum dots in poly(vinyl alcohol) matrix

2012 ◽  
Vol 47 (20) ◽  
pp. 7217-7224
Author(s):  
Kayo O. Vieira ◽  
Herisson F. Santos ◽  
Victor L. Guimarães ◽  
Karla Balzuweit ◽  
Marco T. Raposo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Cds Quantum Dots ◽  
Surface Ligand

Enhanced electrochemiluminescence of CdS quantum dots capped with mercaptopropionic acid activated by EDC for Zika virus detection

The Analyst ◽  
2021 ◽  
Author(s):  
Hui-Jun Zhang ◽  
Jin Zhu ◽  
Ning Bao ◽  
Shou-Nian Ding
Keyword(s):  
Quantum Dots ◽  
Zika Virus ◽  
Virus Detection ◽  
Cds Quantum Dots ◽  
Mercaptopropionic Acid ◽  
Sandwich Type ◽  
Cds Qds

The mechanism of enhanced ECL of MPA@CdS QDs by EDC activation was investigated, and a sandwich-type ECL immunosensor has been designed for Zika virus detection.

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.

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