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Related Concept Videos

Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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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...
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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...
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Ionic Bonds

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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.
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Ionic Compounds: Formulas and Nomenclature03:34

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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.
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Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

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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.
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Ionic Crystal Structures02:42

Ionic Crystal Structures

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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.
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Related Experiment Video

Updated: Feb 7, 2026

Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique
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A Flexible Capacitive Pressure Sensor Based on Ionic Liquid.

Xiaofeng Yang1, Yishou Wang2, Xinlin Qing3

  • 1School of Aerospace Engineering, Xiamen University, Xiamen 361005, China. yangxiaofeng@stu.xmu.edu.cn.

Sensors (Basel, Switzerland)
|July 26, 2018
PubMed
Summary
This summary is machine-generated.

A novel flexible microfluidic super-capacitive pressure sensor using ionic liquid and ITO-PET films offers high sensitivity for measuring surface pressure on complex structures like aircraft.

Keywords:
aerodynamic pressureelectrical double layerionic liquidsensor

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Sensor Technology

Background:

  • Traditional pressure sensors face limitations in measuring surface pressure on complex structures.
  • The need for flexible, sensitive, and rapidly responding pressure sensors is critical in applications like aerospace.

Purpose of the Study:

  • To develop a flexible microfluidic super-capacitive pressure sensor for accurate surface pressure measurement.
  • To investigate the sensor's performance characteristics, including sensitivity, dynamic response, and environmental influences.

Main Methods:

  • Fabrication of a flexible sensor using filter paper impregnated with ionic liquid, sandwiched between two indium tin oxide polyethylene terephthalate (ITO-PET) films.
  • Utilizing changes in capacitance due to deformation of the top ITO-PET film under applied pressure to determine external pressure.
  • Conducting experiments to evaluate sensor performance and the impact of film thickness, sensing area, temperature, and humidity.

Main Results:

  • The developed sensor demonstrates high sensitivity up to 178.5 nF/KPa.
  • The sensor exhibits rapid dynamic responses for pressure measurement.
  • Experimental data provides insights into the influence of various parameters on sensor performance.

Conclusions:

  • The flexible microfluidic super-capacitive pressure sensor is a promising technology for accurate surface pressure measurement on complex structures.
  • The sensor's high sensitivity and rapid response make it suitable for demanding applications, such as aircraft surface monitoring.
  • Further studies on parameter influence can optimize sensor design and performance for specific environments.