Simple Synthesis and Growth Mechanism of Core/Shell CdSe/SiOxNanowires

Core-shell-structured CdSe/SiOxnanowires were synthesized on an equilateral triangle Si (111) substrate through a simple one-step thermal evaporation process. SEM, TEM, and XRD investigations confirmed the core-shell structure; that is, the core zone is single crystalline CdSe and the shell zone isSiOxamorphous layer and CdSe core was grown along (001) direction. Two-stage growth process was present to explain the growth mechanism of the core/shell nanwires. The silicon substrate of designed equilateral triangle providing the silicon source is the key factor to form the core-shell nanowires, which is significant for fabrication of nanowire-core sheathed with a silica system. The PL of the product studied at room temperature showed two emission bands around 715 and 560 nm, which originate from the band-band transition of CdSe cores and the amorphousSiOxshells, respectively.

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Room-Temperature Ordered Photon Emission from Multiexciton States in Single CdSe Core-Shell Nanocrystals

Physical Review Letters ◽

10.1103/physrevlett.94.087403 ◽

2005 ◽

Vol 94 (8) ◽

Cited By ~ 123

Author(s):

Brent Fisher ◽

Jean Michel Caruge ◽

Don Zehnder ◽

Moungi Bawendi

Keyword(s):

Room Temperature ◽

Photon Emission ◽

Core Shell ◽

Cdse Core

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The ultimate step towards a tailored engineering of core@shell and core@shell@shell nanoparticles

Nanoscale ◽

10.1039/c4nr02913e ◽

2014 ◽

Vol 6 (22) ◽

pp. 13483-13486 ◽

Cited By ~ 61

Author(s):

D. Llamosa ◽

M. Ruano ◽

L. Martínez ◽

A. Mayoral ◽

E. Roman ◽

...

Keyword(s):

Building Blocks ◽

Core Shell ◽

Chemical Methods ◽

Shell Nanoparticles ◽

The Core ◽

One Step ◽

Step Generation ◽

The One

Core@shell and core@shell@shell nanoparticles are building blocks for more sophisticated systems and a plethora of applications. The one-step generation of such complex nanoparticles is reported where the atoms of the core and shell can be easily inverted, avoiding intrinsic constraints of chemical methods.

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One-step microwave synthesized core–shell structured selenium@carbon spheres as cathode materials for rechargeable lithium batteries

Chemical Communications ◽

10.1039/c6cc00638h ◽

2016 ◽

Vol 52 (32) ◽

pp. 5613-5616 ◽

Cited By ~ 24

Author(s):

Jing Guo ◽

Qingsong Wang ◽

Chao Qi ◽

Jun Jin ◽

Yingjie Zhu ◽

...

Keyword(s):

Volume Change ◽

Lithium Batteries ◽

Shell Structure ◽

Core Shell ◽

Carbon Spheres ◽

Rechargeable Lithium Batteries ◽

Shuttle Effect ◽

The Core ◽

One Step ◽

Core Shell Structure

The core–shell structure greatly suppressed the shuttle effect of the lithium–selenium battery and the robust carbon shells could remain unbroken even after 100 cycles and flexibly accommodate to the volume change of selenium cores.

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Preparation and Characterization of Gold-Loaded Magnetite/Silica Core-Shell Composites

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.42.47 ◽

2016 ◽

Vol 42 ◽

pp. 47-52

Author(s):

Dan Dan Huang ◽

Zhao Dai ◽

Kun Yang ◽

Yuan Yuan Chu

Keyword(s):

Room Temperature ◽

Solvothermal Reaction ◽

Core Shell ◽

X Ray Diffraction ◽

X Ray ◽

The Core ◽

Transmission Electron ◽

Silica Core ◽

Shell Particles

The fabrication of gold-loaded magnetite/silica core-shell particles was presented in this paper. First, 250 nm of magnetic Fe3O4 nanoparticles were prepared by solvothermal reaction. Then, the Fe3O4 particles were coated by SiO2, and Au nanoparticles (AuNPs), respectively. The core-shell structure of these microspheres was confirmed by transmission electron microscopy (TEM) and Power X-ray diffraction (XRD). The magnetic property of the core-shell microspheres was investigated at room temperature. The results indicated that the core-shell composites had a well-retained high magnetic intensity, thus it can be easily separated from the mixture in less than a few minutes by simply using a magnet.

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Strain Effects on the Band Gap and Diameter of CdSe Core and CdSe/ZnS Core/Shell Quantum Dots at Any Temperature

Advances in Materials Science and Engineering ◽

10.1155/2019/3764395 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10 ◽

Cited By ~ 4

Author(s):

Md. Rezaul Karim ◽

Mesut Balaban ◽

Hilmi Ünlü

Keyword(s):

Quantum Dots ◽

Band Gap ◽

Compressive Strain ◽

Fluorescence Emission ◽

Core Shell ◽

Average Particle ◽

Cdse Core ◽

Strain Effects ◽

The Core ◽

Core Band

We present the results of an experimental study about strain effects on the core band gap and diameter of spherical bare CdSe core and CdSe/ZnS core/shell quantum dots (QDs) synthesized by using a colloidal technique at varying temperatures. Structural characterizations were made by using X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) techniques. Optical characterizations were made by using UV-Vis absorption and fluorescence emission spectroscopies. The XRD analysis suggests that the synthesized bare CdSe core and CdSe/ZnS core/shell QDs have zinc blende crystal structure. HRTEM results indicate that the CdSe core and CdSe/ZnS QDs have average particle sizes about 3.50 nm and 4.84 nm, respectively. Furthermore, compressive strain causes an increase (decrease) in the core band gap (diameter) of spherical CdSe/ZnS core/shell QDs at any temperature. An elastic strain-modified effective mass approximation (EMA) predicts that there is a parabolic decrease (increase) in the core band gap (diameter) of QDs with temperature. The diameter of spherical bare CdSe core and CdSe/ZnS core/shell QDs calculated by using the strain-modified EMA, with core band gap extracted from absorption spectra, are in excellent agreement with the HRTEM data.

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The shell matters: one step synthesis of core–shell silicon nanoparticles with room temperature ultranarrow emission linewidth

Faraday Discussions ◽

10.1039/c9fd00093c ◽

2020 ◽

Vol 222 ◽

pp. 135-148 ◽

Cited By ~ 1

Author(s):

Anna Fucikova ◽

Ilya Sychugov ◽

Jan Linnros

Keyword(s):

Thin Shell ◽

Silicon Nanocrystals ◽

Room Temperature ◽

Silicon Nanoparticles ◽

Core Shell ◽

One Step

Here we present a one-step synthesis that provides silicon nanocrystals with a thin shell composed of a ceramic-like carbonyl based compound, embedded in a porous organosilicon film.

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Construction of AgCl/Ag/BiOCl with a concave-rhombicuboctahedron core–shell hierarchitecture and enhanced photocatalytic activity

RSC Advances ◽

10.1039/c6ra14170f ◽

2016 ◽

Vol 6 (88) ◽

pp. 84738-84747 ◽

Cited By ~ 9

Author(s):

Zhikun Xu ◽

Shuang-Yan Lin

Keyword(s):

Photocatalytic Activity ◽

Room Temperature ◽

High Efficiency ◽

Core Shell ◽

Vapor Diffusion ◽

One Step

Concave-rhombicuboctahedron structure Ag/AgCl/BiOCl heterojunction photocatalyst with high efficiency and stability is prepared through a simple one-step vapor diffusion strategy at room temperature without template or any additives.

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