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Related Concept Videos

Colloids03:22

Colloids

21.2K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
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Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

11.7K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
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Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

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An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.8K
Binary Fission01:26

Binary Fission

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Binary fission is the primary mode of asexual reproduction in prokaryotes, such as bacteria. It results in the production of two genetically identical daughter cells. This highly efficient process ensures the rapid propagation of bacterial populations under favorable conditions and involves coordinated cellular and molecular events.DNA Replication and SeparationThe process begins with the replication of the bacterial chromosome. The circular DNA molecule unwinds at a specific origin of...
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Binary Fission01:20

Binary Fission

63.8K
Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
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Bewley Lattice Diagram01:12

Bewley Lattice Diagram

1.5K
The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation

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Colloidal Binary Supracrystals with Tunable Structural Lattices.

Peng-Peng Wang1, Qiao Qiao2,3, Yimei Zhu2

  • 1Department of Physics and Center for Nanophysics and Advanced Materials , University of Maryland , College Park , Maryland 20742 , United States.

Journal of the American Chemical Society
|July 11, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to create tunable colloidal binary supracrystals using gold and iron oxide nanoparticles. This breakthrough enables new studies in nanoscale interactions and magneto-plasmonic coupling.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Colloid Science

Background:

  • Colloidal binary supracrystals (SCs) offer tunable assembly of multiple nanoparticle types.
  • Limited research exists due to significant challenges in materials growth and control.

Purpose of the Study:

  • To report a controlled method for growing colloidal binary SCs.
  • To demonstrate tunability in SC size, stoichiometry, and lattice structure.
  • To enable new investigations into nanoscale interactions and magneto-plasmonic coupling.

Main Methods:

  • Utilized an oil-in-water emulsion process for nanoparticle assembly.
  • Employed controlled growth parameters to influence SC characteristics.
  • Demonstrated the generality of the method with various nanoparticle building blocks.

Main Results:

  • Successfully synthesized free-standing colloidal binary SCs composed of gold (Au) and iron oxide (Fe3O4) nanoparticles.
  • Achieved broad tunability of SC size, stoichiometry, and lattice structure by adjusting growth parameters.
  • Validated the method's applicability to diverse nanoparticle compositions.

Conclusions:

  • The developed emulsion process provides a versatile platform for fabricating functional binary SCs.
  • These SCs serve as ideal test beds for fundamental studies of nanoscale phenomena.
  • Opens avenues for exploring emergent properties like magneto-plasmonic coupling.