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Videos de Conceptos Relacionados

Colloids03:22

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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

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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

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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:
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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

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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

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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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Supracristales binarios coloidales con redes estructurales sintonizables

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
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron un nuevo método para crear supracristales binarios coloidales sintonizables utilizando nanopartículas de oro y óxido de hierro. Este avance permite nuevos estudios en las interacciones a nanoescala y el acoplamiento magneto-plasmónico.

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Área de la Ciencia:

  • Ciencias de los materiales
  • Nanotecnología
  • Ciencia del coloide

Sus antecedentes:

  • Los supracristales binarios coloidales (SC) ofrecen un conjunto sintonizable de múltiples tipos de nanopartículas.
  • Existe una investigación limitada debido a los desafíos significativos en el crecimiento y control de los materiales.

Objetivo del estudio:

  • Informar sobre un método controlado para el cultivo de SC coloidales binarios.
  • Para demostrar la capacidad de tonificación en el tamaño de la SC, la estequiometría y la estructura de celosía.
  • Permitir nuevas investigaciones sobre las interacciones a nanoescala y el acoplamiento magneto-plasmónico.

Principales métodos:

  • Utilizó un proceso de emulsión de aceite en agua para el ensamblaje de nanopartículas.
  • Utilizó parámetros de crecimiento controlados para influir en las características de SC.
  • Demostró la generalidad del método con varios bloques de construcción de nanopartículas.

Principales resultados:

  • Se han sintetizado con éxito SC binarios coloidales independientes compuestos de nanopartículas de oro (Au) y óxido de hierro (Fe3O4).
  • Se ha logrado una amplia adaptabilidad del tamaño, la estequiometría y la estructura de la celosía mediante el ajuste de los parámetros de crecimiento.
  • Validación de la aplicabilidad del método a diversas composiciones de nanopartículas.

Conclusiones:

  • El proceso de emulsión desarrollado proporciona una plataforma versátil para la fabricación de SC binarios funcionales.
  • Estos SC sirven como bancos de pruebas ideales para estudios fundamentales de fenómenos a nanoescala.
  • Abre vías para explorar propiedades emergentes como el acoplamiento magneto-plasmónico.