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Related Concept Videos

Ionic Radii03:10

Ionic Radii

33.9K
Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
33.9K
Ionic Bonds00:42

Ionic Bonds

132.2K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
132.2K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

20.3K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
20.3K
Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

88.1K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
88.1K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

68.3K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
68.3K
Ionic Crystal Structures02:42

Ionic Crystal Structures

17.9K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
17.9K

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Related Experiment Video

Updated: Feb 13, 2026

Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
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Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids

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Rapid Assessment of Sputtered Nanoparticle Ionic Liquid Combinations.

Hajo Meyer1, Michael Meischein1, Alfred Ludwig1

  • 1Werkstoffe der Mikrotechnik, Institut für Werkstoffe, Fakultät für Maschinenbau , Ruhr-Universität Bochum , Universitätsstrasse 150 , D-44801 Bochum , Germany.

ACS Combinatorial Science
|March 10, 2018
PubMed
Summary

This study introduces a rapid method to evaluate nanoparticle suspensions in various ionic liquids. Only three specific ionic liquid combinations demonstrated long-term stability for silver nanoparticles.

Keywords:
combinatorial methodshigh-throughput characterizationionic liquidssilver nanoparticlessputter deposition

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Ionic liquids offer unique solvent properties for nanomaterial synthesis.
  • Controlling nanoparticle formation and stability in ionic liquids is crucial for applications.
  • Existing methods for assessing nanoparticle suspensions are often time-consuming.

Purpose of the Study:

  • To develop and validate a high-throughput method for assessing nanoparticle suspension formation and stability in ionic liquids.
  • To identify specific ionic liquid formulations that yield stable, non-agglomerated nanoparticle suspensions.
  • To investigate the influence of varying cation and anion structures on suspension stability.

Main Methods:

  • High-throughput synthesis and assessment of silver (Ag) nanoparticle suspensions in nine different ionic liquids.
  • Utilizing a cavity array for simultaneous sample preparation.
  • Characterization of nanoparticle size, morphology, and suspension stability using transmission electron microscopy (TEM).

Main Results:

  • Successful formation of non-agglomerated silver nanoparticle suspensions (4-9 nm) in several ionic liquids.
  • Observed varying time dependencies for suspension stability across different ionic liquid formulations.
  • Identified three ionic liquids exhibiting long-term stability: 1-butyl-3-methylimidazolium bis(perfluoroethylsulfonyl)imide ([Bmim][(Pf)2N]), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Bmim][(Tf)2N]), and 1-butyl-1-methylpyrrolidinum bis(trifluoromethylsulfonyl)imide ([BmPyr][(Tf)2N]).

Conclusions:

  • The developed high-throughput method efficiently screens ionic liquids for stable nanoparticle suspension formation.
  • Specific ionic liquid compositions, particularly those with bis(perfluoroethylsulfonyl)imide and bis(trifluoromethylsulfonyl)imide anions, are suitable for stable silver nanoparticle suspensions.
  • This research provides a foundation for selecting optimal ionic liquids in nanomaterial synthesis and processing.