Electronic, optical and magnetic properties of Co, Fe and Ni doped (ZnX) 6 ; (X = O, S & Se) quantum dots – A DFT study

2017 ◽  
Vol 1111 ◽  
pp. 56-68 ◽  
Author(s):  
Sankarasubramanian Gopalakrishnan ◽  
Ponmalai Kolandaivel
Keyword(s):  
Quantum Dots ◽  
Magnetic Properties ◽  
Dft Study ◽  
Optical And Magnetic Properties

Tuned optical and magnetic properties of Ce3+ doped SnS2 quantum dots

2019 ◽  
Vol 114 (7) ◽  
pp. 072403 ◽  
Author(s):  
Qi Zhao ◽  
Qing Lu ◽  
Yi Liu ◽  
Mingzhe Zhang
Keyword(s):  
Quantum Dots ◽  
Magnetic Properties ◽  
Optical And Magnetic Properties

Optical and Magnetic Properties of Conjugate Structures of PbSe Quantum Dots and γ-Fe2O3Nanoparticles

ChemPhysChem ◽  
2009 ◽  
Vol 10 (13) ◽  
pp. 2235-2241 ◽  
Author(s):  
Lioz Etgar ◽  
Gregory Leitus ◽  
Leonid Fradkin ◽  
Yehuda G. Assaraf ◽  
Rina Tannenbaum ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Magnetic Properties ◽  
Optical And Magnetic Properties

scholarly journals Synthesis, Optical, and Magnetic Properties of Graphene Quantum Dots and Iron Oxide Nanocomposites

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
M. Sajjad ◽  
V. Makarov ◽  
M. S. Sultan ◽  
W. M. Jadwisienczak ◽  
B. R. Weiner ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Magnetic Properties ◽  
Iron Oxide ◽  
Uv Light ◽  
Room Temperature Ferromagnetism ◽  
Graphene Quantum Dots ◽  
High Yield ◽  
Medical Applications ◽  
Laser Discharge ◽  
Optical And Magnetic Properties

The combination of nanomaterial graphene quantum dots (GQDs) with magnetic nanoparticles offers a unique set of optical and magnetic properties for future energy and medical applications. We report on the synthesis and engineering of GQDs and iron oxide (Fe3O4) nanocomposites (NCs) by using a pulsed laser discharge technique. High-resolution transmission electron microscopy (HRTEM) images showed a high yield of pure GQDs with 2–10 nm diameter. The hexagonal structures and lattice fringes associated with the C–C bond in GQDs were clearly identifiable. The structural and optical changes in GQDs and GQDs-Fe3O4 NC samples induced by UV light were investigated by the absorption and emission spectroscopy over the deep UV–visible spectral range. The photoluminescence spectra have shown subband π→π∗ transitions in GQDs-Fe3O4 NC. Magnetic properties of the GQDs-Fe3O4 NC samples have shown room temperature ferromagnetism induced by pure Fe3O4 nanoparticles and from the substantial spin polarized edges of GQD nanoparticles. It is concluded that the observed optical and magnetic properties could be further tailored in the studied nanocomposites for prospective medical applications.

Green synthesis of zinc oxysulfide quantum dots using aegle marmelos fruit extract and their cytotoxicity in HeLa cells

RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 16815-16820 ◽  
Author(s):  
Kalavakunta Venkata Pavan Kumar ◽  
Oriparambil Sivaraman Nirmal Ghosh ◽  
G. Balakrishnan ◽  
P. Thirugnanasambantham ◽  
Santhosh Kumar Raghavan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Magnetic Properties ◽  
Green Synthesis ◽  
Hela Cells ◽  
Research Interest ◽  
Aegle Marmelos ◽  
Fruit Extract ◽  
Zinc Oxysulfide ◽  
Optical And Magnetic Properties

Zinc oxysulfide quantum dots have been attracting increasing research interest due to their tunable electronic, optical and magnetic properties.

Tuning the optical and magnetic properties of II–VI quantum dots by post-growth rapid thermal annealing

2004 ◽  
Vol 241 (3) ◽  
pp. 652-655 ◽  
Author(s):  
T. Gurung ◽  
S. Mackowski ◽  
H. E. Jackson ◽  
L. M. Smith ◽  
W. Heiss ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Magnetic Properties ◽  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Optical And Magnetic Properties

scholarly journals Monitoring of the Mechanism of Mn Ions Incorporation into Quantum Dots by Optical and EPR Spectroscopy

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 107
Author(s):  
Yuriy G. Galyametdinov ◽  
Dmitriy O. Sagdeev ◽  
Andrey A. Sukhanov ◽  
Violeta K. Voronkova ◽  
Radik R. Shamilov
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Magnetic Properties ◽  
Luminescent Properties ◽  
Manganese Concentration ◽  
Manganese Ions ◽  
Paramagnetic Resonance ◽  
Synthesis Of Nanoparticles ◽  
Zinc Sulfide Nanoparticles ◽  
Optical And Magnetic Properties ◽  
Electron Paramagnetic

Synthesis of nanoparticles doped with various ions can significantly expand their functionality. The conditions of synthesis exert significant influence on the distribution nature of doped ions and therefore the physicochemical properties of nanoparticles. In this paper, a correlation between the conditions of synthesis of manganese-containing cadmium sulfide or zinc sulfide nanoparticles and their optical and magnetic properties is analyzed. Electron paramagnetic resonance was used to study the distribution of manganese ions in nanoparticles and the intensity of interaction between them depending on the conditions of synthesis of nanoparticles, the concentration of manganese, and the type of initial semiconductor. The increase of manganese concentration is shown to result in the formation of smaller CdS-based nanoparticles. Luminescent properties of nanoparticles were studied. The 580 nm peak, which is typical for manganese ions, becomes more distinguished with the increase of their concentration and the time of synthesis.

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