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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...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Structures of Solids02:22

Structures of Solids

Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
Unit Cells01:18

Unit Cells

A crystal's internal structure is an orderly array of atoms, ions, or molecules, and the details of this array significantly influence the solid's properties. In a crystal, periodically repeating 'structural motifs' - which could be atoms, molecules, or groups thereof - create a 'space lattice.' This is essentially a three-dimensional, infinite array of points, each surrounded by its neighbors in an identical way, forming the basic structure of the crystal.A 'unit cell' is a theoretical...
The Seven Crystal Systems: Overview01:24

The Seven Crystal Systems: Overview

Crystals with various point group symmetries belong to different crystal classes, which are synonymous terms. Despite being in the same class, crystals may have distinct shapes, like cubes and octahedra. There are 32 three-dimensional point groups, all of which are systematically divided into seven crystal systems.The basic cubic crystal system, exemplified by NaCl, features orthogonal vectors (α = β = �� = 90°) of equal lengths (a = b = c). When specific requirements are not imposed on the...

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Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles
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Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles

Published on: October 16, 2017

Mesocrystals--ordered nanoparticle superstructures.

Rui-Qi Song1, Helmut Cölfen

  • 1Max-Planck-Institute of Colloids and Interfaces, Colloid Chemistry, Research Campus Golm Am Mühlenberg, Potsdam, Germany.

Advanced Materials (Deerfield Beach, Fla.)
|May 4, 2010
PubMed
Summary
This summary is machine-generated.

Mesocrystals, 3D ordered nanoparticle superstructures, offer unique properties for advanced materials. Further research into their synthesis and properties will unlock their full potential in materials science.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Chemistry

Background:

  • Mesocrystals are 3D ordered nanoparticle superstructures with internal porosity.
  • They are increasingly found in biomineralization and synthesized, attracting significant research interest.
  • Their full potential as advanced materials remains largely unexplored.

Purpose of the Study:

  • To explore the novel chemical and physical properties arising from mesocrystal structures.
  • To understand how nanoparticle aggregation influences material properties.
  • To investigate synthesis mechanisms for broader material applicability.

Main Methods:

  • Review of recent advancements in mesocrystal research (last three years).
  • Analysis of structure-property relationships in mesocrystals.
  • Discussion of synthesis strategies and mechanisms.

Main Results:

  • Significant progress has been made in understanding mesocrystal systems.
  • New chemical and physical properties associated with mesocrystal structures are being identified.
  • Synthesis mechanisms are being explored for wider material applications.

Conclusions:

  • Mesocrystals are crucial for materials research, enabling advanced synthesis and property improvement.
  • Further research into mesocrystal properties and synthesis is essential.
  • This field offers attractive future research directions for novel materials.