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Related Concept Videos

Common Ion Effect03:24

Common Ion Effect

47.0K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
47.0K
Precipitation of Ions03:11

Precipitation of Ions

30.3K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
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Ion Channels01:19

Ion Channels

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The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
91.5K
Formation of Complex Ions03:45

Formation of Complex Ions

26.2K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
26.2K
Ions and Ionic Charges03:27

Ions and Ionic Charges

79.3K
In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
79.3K
Ions as Acids and Bases02:54

Ions as Acids and Bases

26.6K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
26.6K

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Related Experiment Video

Updated: Feb 10, 2026

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
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In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

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From Isolated Ions to Multilayer Functional Materials Using Ion Soft Landing.

Julia Laskin1, Grant E Johnson2, Jonas Warneke2

  • 1Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA.

Angewandte Chemie (International Ed. in English)
|May 16, 2018
PubMed
Summary

Ion soft landing, a preparative mass spectrometry technique, enables uniform molecular layers. Recent advances allow precise fabrication of complex structures and novel devices, opening new research avenues.

Keywords:
3D layered materialscharge retentionion soft landingmesoscale aggregatesself-organizing layers

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Area of Science:

  • Surface Science
  • Analytical Chemistry
  • Materials Science

Background:

  • Preparative mass spectrometry, or ion soft landing, deposits intact polyatomic ions onto surfaces.
  • Early research focused on characterizing sparsely distributed soft-landed species.
  • Uniform molecular and ionic layers are crucial for advanced material fabrication.

Purpose of the Study:

  • To review recent developments in ion soft landing for interface preparation.
  • To highlight phenomena uncovered by high-flux ion deposition.
  • To discuss applications in energy storage, catalysis, soft materials, and biology.

Main Methods:

  • Utilizing high-flux ionization sources for controlled ion deposition.
  • Employing mass spectrometry for precise control over ion composition, charge state, and kinetic energy.
  • Fabricating two-dimensional and three-dimensional structures through ion soft landing.

Main Results:

  • High-flux ion deposition enables precise preparation of uniform molecular and ionic layers.
  • Previously unknown phenomena observed with increased ion deposition rates.
  • Fabrication of novel functional devices is enabled by faster ion deposition.

Conclusions:

  • Ion soft landing is a powerful technique for creating well-defined interfaces.
  • Advancements in ion soft landing are driving innovation in materials science and device fabrication.
  • This technique holds significant promise for applications in energy, catalysis, and biological studies.