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Related Concept Videos

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...
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The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra. Schrödinger...
Energy Bands in Solids01:01

Energy Bands in Solids

Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
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Molecular and Ionic Solids02:54

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Crystal Field Theory
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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.
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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Ag(9) quantum cluster through a solid-state route.

Thumu Udaya B Rao1, Bodappa Nataraju, Thalappil Pradeep

  • 1DST Unit on Nanoscience (DST UNS), Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai 600 036, India.

Journal of the American Chemical Society
|November 2, 2010
PubMed
Summary
This summary is machine-generated.

Researchers synthesized a stable silver cluster, Ag(9)(H(2)MSA)(7), using a solid-state route. This method yields pure clusters with unique optical properties, important for cluster research.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Inorganic Chemistry

Background:

  • Silver clusters are gaining attention for their unique optical and electronic properties.
  • Synthesis of pure, well-characterized silver clusters in macroscopic quantities remains a challenge.
  • Understanding the stability and decomposition kinetics of silver clusters is crucial for their applications.

Purpose of the Study:

  • To develop a scalable synthesis for silver clusters with the composition Ag(9)(H(2)MSA)(7).
  • To characterize the synthesized clusters thoroughly using various spectroscopic and microscopic techniques.
  • To investigate the stability and decomposition behavior of the silver clusters.

Main Methods:

  • Solid-state synthesis route for Ag(9)(H(2)MSA)(7) clusters.
  • Purification using Polyacrylamide Gel Electrophoresis (PAGE).
  • Characterization via UV-vis, FTIR, luminescence, NMR, TEM, XPS, XRD, TG, SEM/EDAX, elemental analysis, and ESI MS.

Main Results:

  • Macroscopic quantities of nearly pure Ag(9)(H(2)MSA)(7) clusters were successfully synthesized.
  • The solid-state route minimized nanoparticle contamination.
  • The cluster exhibited characteristic absorption profiles similar to gold clusters and luminescence with a quantum yield of 8 × 10(-3) at 5 °C.
  • Decomposition in water followed first-order kinetics but was stabilized in solvent mixtures and solid state.

Conclusions:

  • The solid-state route is effective for synthesizing pure Ag(9) clusters.
  • The synthesized silver clusters possess properties relevant for cluster research and potential applications.
  • Stability can be enhanced in specific environments, broadening their utility.