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Centrifugation

Centrifugation

Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...

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Updated: Jan 12, 2026

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol

Published on: December 20, 2016

Dynamically-Centrifugated Supercontinuous Gradient Nanocarbon Film.

Huili Fu¹, Li Chen^1,2, Zhengpeng Yang³

¹Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.

|November 5, 2025

Summary

This summary is machine-generated.

Researchers developed a novel dynamical centrifugal casting method using graphene oxide and carbon nanotubes to create supercontinuous gradient nanocarbon films. These films offer tunable properties and exceptional electromagnetic interference shielding efficiency.

Keywords:

EMI shielding dynamical centrifugal casting electrothermal performance nanocarbon film supercontinuous gradient structure

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Area of Science:

Materials Science
Nanotechnology
Composite Materials

Background:

Functional gradient films are of significant interest due to their microstructural variations.
Precise control over gradient structures in these films remains a key challenge.

Purpose of the Study:

To propose a novel dynamical centrifugal casting strategy for fabricating supercontinuous gradient nanocarbon films (SGNFs).
To demonstrate the regulation of gradient pore structure and electrical conductivity by controlling the reduction degree of graphene oxide (GO).

Main Methods:

Utilized graphene oxide (GO) and single-walled carbon nanotubes (SWNTs) as primary building blocks.
Employed a dynamical centrifugal casting technique for film fabrication.
Varied the reduction degree of GO to tune film properties.

Main Results:

Achieved an exceptional electromagnetic interference (EMI) shielding efficiency (SE) of 62 dB with ultralow reflection (R=0.7).
Enhanced EMI SE to 98 dB after graphitization, demonstrating adjustable absorption.
Observed satisfactory electrothermal performance in practical applications.

Conclusions:

The proposed dynamical centrifugal casting strategy offers a viable method for architecting SGNFs.
The fabricated SGNFs exhibit attractive performance advantages, including high EMI shielding and tunable properties.
This approach provides a pathway for advanced functional gradient materials.