Spectral study of the self-organization of quantum dots during the evaporation of colloidal solutions

2011 ◽  
Vol 78 (11) ◽  
pp. 699 ◽  
Author(s):  
V. E. Adrianov ◽  
V. G. Maslov ◽  
A. V. Baranov ◽  
A. V. Fedorov ◽  
M. V. Artem’ev
Keyword(s):  
Quantum Dots ◽  
Spectral Study ◽  
The Self ◽  
Self Organization ◽  
Colloidal Solutions

Quantum dots: Self-organized and self-limiting assembly

2017 ◽  
Author(s):  
Dimitri D. Vvedensky
Keyword(s):  
Information Technology ◽  
Quantum Dots ◽  
Molecular Beam ◽  
Industrial Revolution ◽  
Semiconductor Quantum Dots ◽  
The Self ◽  
Self Organization ◽  
Quantum Nanostructures ◽  
Self Organized ◽  
Site Control

This article describes the self-organized and self-limiting assembly of quantum dots, with particular emphasis on III–V semiconductor quantum dots. It begins with a background on the second industrial revolution, highlighted by advances in information technology and which paved the way for the era of ‘quantum nanostructures’. It then considers the science and technology of quantum dots, followed by a discussion on methods of epitaxial growth and fabrication methodologies of semiconductor quantum dots and other supported nanostructures, including molecular beam epitaxy and metalorganic vapor-phase epitaxy. It also examines self-organization in Stranski–Krastanov systems, site control of quantum dots on patterned substrates, nanophotonics with quantum dots, and arrays of quantum dots.

Shape Transition of InAs Islands on InP (111)A

2000 ◽  
Vol 618 ◽  
Author(s):  
Hanxuan Li ◽  
Theda Daniels-Race ◽  
Mohamed-Ali Hasan
Keyword(s):  
Quantum Dots ◽  
Atomic Force Microscopy ◽  
Aspect Ratio ◽  
Critical Size ◽  
The Self ◽  
Self Organization ◽  
Shape Transition ◽  
Force Microscopy ◽  
Atomic Force

ABSTRACTAtomic force microscopy (AFM) reveals that InAs islands grown on InP (111)A, as they grow in size, undergo a shape transition. Below a critical size of around 30 nm, round-shaped quantum dots form, while above this size they grow in the shape of triangles, reflecting the symmetry of the (111) substrates. The edges of triangular islands are aligned along the three equivalent {110} directions of the InP (111) surface. The triangular islands grow laterally much faster than vertically, indicating the aspect ratio decrease of the islands with increasing InAs coverage. Our results provide a better understanding of the self-organization behaviors of InAs on InP (111)A.

Study of the self-organization processes in lead sulfide quantum dots

2014 ◽  
Vol 48 (13) ◽  
pp. 1729-1731 ◽  
Author(s):  
S. A. Tarasov ◽  
O. A. Aleksandrova ◽  
A. I. Maksimov ◽  
E. V. Maraeva ◽  
L. B. Matyushkin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lead Sulfide ◽  
The Self ◽  
Self Organization ◽  
Lead Sulfide Quantum Dots

scholarly journals Self-organization of an optomagnetic CoFe2O4–ZnS nanocomposite: preparation and characterization

2015 ◽  
Vol 3 (16) ◽  
pp. 3935-3945 ◽  
Author(s):  
Ali Amiri Zarandi ◽  
Ali A. Sabbagh Alvani ◽  
Reza Salimi ◽  
Hassan Sameie ◽  
Shima Moosakhani ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Magnetic Nanoparticles ◽  
Saturation Magnetization ◽  
The Self ◽  
Self Organization ◽  
Advanced Method ◽  
Luminescence Characteristics

We report an advanced method for the self-organization of an optomagnetic nanocomposite composed of both fluorescent ZnS quantum dots and CoFe2O4 magnetic nanoparticles with acceptable saturation magnetization and satisfactory luminescence characteristics.

scholarly journals Influence of Salt on the Self-Organization in Solutions of Star-Shaped Poly-2-alkyl-2-oxazoline and Poly-2-alkyl-2-oxazine on Heating

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1152
Author(s):  
Tatyana Kirila ◽  
Anna Smirnova ◽  
Alla Razina ◽  
Andrey Tenkovtsev ◽  
Alexander Filippov
Keyword(s):  
Phase Separation ◽  
Salt Concentration ◽  
Monomer Unit ◽  
Salt Content ◽  
The Self ◽  
Self Organization ◽  
Phase Separation Temperature ◽  
The Core ◽  
Separation Temperature ◽  
Water Salt

The water–salt solutions of star-shaped six-arm poly-2-alkyl-2-oxazines and poly-2-alkyl-2-oxazolines were studied by light scattering and turbidimetry. The core was hexaaza[26]orthoparacyclophane and the arms were poly-2-ethyl-2-oxazine, poly-2-isopropyl-2-oxazine, poly-2-ethyl-2-oxazoline, and poly-2-isopropyl-2-oxazoline. NaCl and N-methylpyridinium p-toluenesulfonate were used as salts. Their concentration varied from 0–0.154 M. On heating, a phase transition was observed in all studied solutions. It was found that the effect of salt on the thermosensitivity of the investigated stars depends on the structure of the salt and polymer and on the salt content in the solution. The phase separation temperature decreased with an increase in the hydrophobicity of the polymers, which is caused by both a growth of the side radical size and an elongation of the monomer unit. For NaCl solutions, the phase separation temperature monotonically decreased with growth of salt concentration. In solutions with methylpyridinium p-toluenesulfonate, the dependence of the phase separation temperature on the salt concentration was non-monotonic with minimum at salt concentration corresponding to one salt molecule per one arm of a polymer star. Poly-2-alkyl-2-oxazine and poly-2-alkyl-2-oxazoline stars with a hexaaza[26]orthoparacyclophane core are more sensitive to the presence of salt in solution than the similar stars with a calix[n]arene branching center.

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