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Updated: Feb 18, 2026

$Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing$

Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing

Published on: March 13, 2013

Liquid Photonic Crystals for Mesopore Detection.

Biting Zhu¹, Qianqian Fu¹, Ke Chen¹

¹School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China.

Angewandte Chemie (International Ed. in English)

|November 22, 2017

Summary

A novel method simplifies mesoporous material characterization by analyzing SiO2 colloidal solutions, offering a fast, economical alternative to traditional nitrogen adsorption-desorption techniques for pore size and volume analysis.

Keywords:

indicator liquid photonic crystals mesopores porous materials

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Area of Science:

Materials Science
Nanotechnology
Physical Chemistry

Background:

Traditional mesopore characterization relies on nitrogen adsorption-desorption, which is costly and time-consuming.
This method requires specialized instrumentation and liquid nitrogen, limiting accessibility.

Purpose of the Study:

To develop a new, rapid, and economical method for characterizing mesoporous materials.
To establish a viable alternative to conventional pore analysis techniques.

Main Methods:

Mixing mesoporous substances with supersaturated SiO2 colloidal solutions at varying temperatures.
Measuring reflection changes in precipitated liquid photonic crystals.
Correlating reflection changes (Δλ/m) with pore volume (V) and temperature (T) with pore diameter (D).

Main Results:

Established a positive correlation between unit mass reflection change and pore volume.
Demonstrated a negative correlation between average absorption temperature and pore diameter.
Validated the method for mesoporous silica characterization.

Conclusions:

The developed method offers a fast, convenient, and economical approach for mesoporous material characterization.
This technique provides a promising alternative to established methods like nitrogen adsorption-desorption.
Potential for broader application in materials science research and industry.