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Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
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Orbitals are the areas outside of the atomic nucleus where electrons are most likely to reside. They are characterized by different energy levels, shapes, and three-dimensional orientations. The location of electrons is described most generally by a shell or principal energy level, then by a subshell within each shell, and finally, by individual orbitals found within the subshells.
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Updated: Feb 11, 2026

Nanoscale Characterization of Liquid-Solid Interfaces by Coupling Cryo-Focused Ion Beam Milling with Scanning Electron Microscopy and Spectroscopy
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Nanoscale Lacing by Electrons.

Han-Wen Cheng1,2, Jie Wang3, Yong-Jun Li2

  • 1School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China.

Small (Weinheim an Der Bergstrasse, Germany)
|April 18, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel method using electrons to precisely assemble gold nanoclusters and nanoparticles into 1D strings. This electron-initiated process allows for size-focused assembly, enabling tunable properties for various applications.

Keywords:
1D lacingAu (I)-SR stringaggregative growthe-beam irradiationmolecularly templated assemblynanoclusters and nanoparticles

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Area of Science:

  • Nanotechnology and Materials Science
  • Electron Microscopy and Nanofabrication

Background:

  • Controlling the size and spatial arrangement of nanoparticles is crucial for their optical and electrical properties but remains a significant challenge.
  • Existing methods often lack precise size focusing, hindering the development of advanced nanomaterials.

Purpose of the Study:

  • To demonstrate a novel method for size-focused assembly of gold nanoclusters and nanoparticles into one-dimensional (1D) string structures.
  • To utilize electrons as a clean and focusing agent for initiating and controlling nanoparticle assembly.

Main Methods:

  • Electron-initiated nucleation and aggregative growth of gold(I)-thiolate (Au(I)-thiolate) motifs on a thin film substrate.
  • Precise control over electron dose during transmission electron microscopy (TEM) imaging to achieve size-focused assembly.
  • Utilizing molecularly mediated alignment and electrostatic/aurophilic interactions as a molecular template for 1D lacing.

Main Results:

  • Successful demonstration of string assembly of gold nanoclusters and nanoparticles via electron-initiated nucleation.
  • Size-focused assembly achieved by controlling the electron dose, leading to predictable nanoparticle arrangements.
  • Formation of 1D assemblies with tunable catalytic, optical, and sensing properties.

Conclusions:

  • Electron-initiated assembly offers a hierarchical route for creating precisely controlled 1D nanostructures.
  • This method provides a pathway to engineer nanomaterials with tailored properties for diverse applications in catalysis, optics, and sensing.