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Updated: Feb 3, 2026

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Published on: November 15, 2016

イオン性高分子導波路グレーティングを用いたデュアルモーダルイオン性高分子光導波路グレーティングセンサーによる温度・湿度検出

Yunlong Yu¹, Huayue Zhao¹, Yaping Song¹

¹State Key Laboratory of Integrated Optoelectronics, JLU Region, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P.R. China.

ACS applied materials & interfaces

|February 1, 2026

Abstract:

In this work, a long-period grating (LPG) sensor for dual-modal detection applications using a metal-printing poly(ionic liquid)s (PILs) waveguide is proposed. High-sensitivity temperature and humidity monitoring based on free ionic dynamic mechanism are achieved by an optical-sensing module. The ionic thermal-optic (ITO) and ionic humid-optic (IHO) coefficients of featured PILs waveguide film are obtained as -9.3 × 10^-4/K and -3.1 × 10^-4/% RH, respectively. Both the top humidity sensing and bottom temperature sensing characteristics of the LPG sensor are realized, with a sensitivity of 650 nm/K and resolution of 0.01 K for temperature detection and a sensitivity of 1.05 nm/% RH and resolution of 1% RH for humidity detection, respectively. This optical sensing technique through photonic integrated circuits provides a potential prospect for on-chip multimodal parameter detection.

キーワード:

長周期導波路グレーティングオンチップ検出光学湿度センサー光学温度センサーポリ（イオン液体）

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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Ionic Radii

Ionic Radii

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...

Ionic Bonds

Ionic Bonds

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...

Molecular and Ionic Solids

Molecular and Ionic Solids

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...

Polymers

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...

Solubility of Ionic Compounds

Solubility of Ionic Compounds

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.

Ionic Crystal Structures

Ionic Crystal Structures

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...