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Related Concept Videos

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy14:55

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Structures of supramolecular protein assemblies at atomic resolution are of high relevance because of their crucial roles in a variety of biological phenomena. Herein, we present a protocol to perform high-resolution structural studies on insoluble and non-crystalline macromolecular protein assemblies by magic-angle spinning solid-state nuclear magnetic resonance spectroscopy (MAS...
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Molecular Comparison of Gases, Liquids, and Solids02:26

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Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
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Metallic Solids

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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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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...
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Solid-Liquid Extraction09:32

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Extraction is a crucial step in most chemical analyses. It entails removing the analyte from its sample matrix and passing it into the phase required for spectroscopic or chromatographic identification and quantification. When the sample is a solid and the required phase for analysis is a liquid, the process is called solid-liquid extraction. A simple and broadly applicable form of solid-liquid extraction entails combining...
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Determining the Density of a Solid and Liquid

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Source: Laboratory of Dr. Michael Evans — Georgia Institute of Technology
The ratio of the mass of a substance to its volume is known as the mass density or, simply, the density of the substance. Density is expressed in units of mass per volume, such as g/mL or kg/m3. Because the density of a substance does not depend on the amount of substance present, density is an “intensive property”.
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Updated: Jan 19, 2026

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
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Atomic-scale thermal manipulation with adsorbed atoms on a solid surface at a liquid-solid interface.

Kunio Fujiwara1, Masahiko Shibahara2

  • 1Center for Atomic and Molecular Technologies, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan. k.fujiwara@mech.eng.osaka-u.ac.jp.

Scientific Reports
|September 15, 2019
PubMed
Summary

This study reveals that adsorbed atoms on surfaces can significantly enhance heat flux at the atomic scale. This atomic-scale thermal manipulation is particularly effective on low wettability surfaces.

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Area of Science:

  • Nanoscience and Nanotechnology
  • Materials Science
  • Surface Science

Background:

  • Modulating thermal transport across interfaces is crucial in nanoscience.
  • Understanding liquid-solid interface thermal dynamics is key for nanotechnology applications.

Purpose of the Study:

  • To investigate thermal transport between adsorbed atoms and a liquid phase.
  • To explore atomic-scale thermal manipulation by controlling atom-liquid interactions.

Main Methods:

  • Employed non-equilibrium molecular dynamics simulations.
  • Detected heat flux at sub-atomic spatial resolution, creating 2D local heat flux maps.
  • Varied interaction strengths between liquid molecules and adsorbed atoms.

Main Results:

  • Adsorbed atoms significantly enhance heat flux at the single-atom scale.
  • Normal degrees of freedom of adsorbed atoms play a key role in heat flux enhancement.
  • The effect is more pronounced on low wettability surfaces.

Conclusions:

  • Demonstrated atomic-scale control over thermal transport at liquid-solid interfaces.
  • Highlighted the potential for local enhancement of heat flux using adsorbed atoms.
  • Provided insights into thermal management at the nanoscale for specific surface conditions.