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¹³C NMR: ¹H–¹³C Decoupling

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...

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Related Experiment Video

Updated: Jul 11, 2026

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method

Published on: February 28, 2014

Three-dimensional Patterning Super-Black Silica-Based Nanocomposite Aerogels.

Zhiyang Zhao^1,2, Romain Civioc¹, Wei Liu²

¹Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, 8600, Empa, Dübendorf, Switzerland.

Nano-Micro Letters

|August 20, 2025

Summary

Researchers developed 3D printable super-black aerogels by combining silica and carbon materials. These advanced aerogels offer exceptional thermal insulation and high photothermal conversion efficiency for applications like solar water production.

Keywords:

3D printing Aerogel Nanocomposites Photothermal conversion Super-black

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Last Updated: Jul 11, 2026

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method

Published on: February 28, 2014

Fabrication and Testing of Catalytic Aerogels Prepared Via Rapid Supercritical Extraction

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Published on: August 31, 2018

Aesthetically Enhanced Silica Aerogel Via Incorporation of Laser Etching and Dyes

Aesthetically Enhanced Silica Aerogel Via Incorporation of Laser Etching and Dyes

Published on: March 12, 2021

Area of Science:

Materials Science
Nanotechnology
Advanced Composites

Background:

Aerogels are ultra-lightweight, porous materials known for excellent thermal insulation.
Their nanostructure can enhance light absorption when combined with specific materials.
Developing multifunctional materials with tunable properties is an ongoing research area.

Purpose of the Study:

To create 3D printable super-black composite aerogels with enhanced photothermal properties.
To optimize the silica-to-resorcinol-formaldehyde (RF) ratio for improved material characteristics.
To investigate the thermal, optical, and electrical properties of the resulting silica-carbon aerogels.

Main Methods:

Incorporation of mesoporous silica aerogel particles into a resorcinol-formaldehyde (RF) sol.
Optimization of the silica-to-RF ratio for direct ink writing (DIW) 3D printing.
Pyrolysis of printed green bodies to form silica-carbon aerogel composites.

Main Results:

Achieved uniform carbon coatings on silica pore walls with optimized silica loading.
Demonstrated excellent shape fidelity and mechanical strength in 3D printed structures.
Obtained super-black coloration (99.56% absorption) and high photothermal conversion efficiency (94.2%).
Confirmed stable electrical conductivity and low electrochemical impedance of the silica-carbon aerogels.

Conclusions:

The developed 3D printable silica-carbon aerogels exhibit synergistic super-black and photothermal properties.
These materials are highly versatile for multifunctional applications, including thermal management and solar-driven water production.