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Related Concept Videos

Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
Network Covalent Solids02:18

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...

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Related Experiment Video

Updated: May 8, 2026

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
08:19

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Published on: March 2, 2016

Triangular core-shell ZnO@SiO2 nanoparticles.

Vijay Bhooshan Kumar1, Aharon Gedanken, Pradip Paik

  • 1Materials Engineering and Nanoscience and Technology, School of Engineering Sciences and Technology, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, A.P., 500 046 (India), Fax: (+91) 40-23011087.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|August 15, 2013
PubMed
Summary
This summary is machine-generated.

Novel core-shell nanostructures with zinc oxide (ZnO) particles inside silicon dioxide (SiO2) shells were synthesized. These structures exhibit tunable optoelectronic properties due to quantum-confinement effects.

Keywords:
SiO2ZnOcore–shell nanoparticlesquantum confinementspectroscopy

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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

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Last Updated: May 8, 2026

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
08:19

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Published on: March 2, 2016

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
05:26

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Core-shell nanostructures offer unique properties for advanced applications.
  • Tuning material properties at the nanoscale is crucial for optoelectronic devices.

Purpose of the Study:

  • To report the first synthesis of ZnO/SiO2 core-shell nanostructures with equilateral triangular shells.
  • To investigate the potential of these nanostructures for optoelectronic applications.

Main Methods:

  • Synthesis of core-shell nanostructures with ZnO cores and SiO2 shells.
  • Characterization of the nanostructures' morphology and properties.

Main Results:

  • Successfully fabricated well-packed core-shell nanostructures with ZnO encapsulated in equilateral triangular SiO2 shells.
  • Observed quantum-confinement effects within the nanostructures.

Conclusions:

  • The novel ZnO/SiO2 core-shell nanostructures are suitable for optoelectronic applications.
  • Quantum confinement provides a pathway to tune the optoelectronic properties of these nanostructures.