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Related Experiment Video

Updated: Feb 11, 2026

Synthesis of Graphene Nanofluids with Controllable Flake Size Distributions
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Bio-inspired graphene-derived membranes with strain-controlled interlayer spacing.

Enlai Gao1, Zhiping Xu

  • 1Applied Mechanics Laboratory, Department of Engineering Mechanics and Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China. xuzp@tsinghua.edu.cn enlaigao@gmail.com.

Nanoscale
|April 27, 2018
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Summary

Bio-inspired graphene membranes with precisely controlled nanoscale channel spacing offer enhanced separation and filtration. This design, mimicking natural nacre, achieves tunable interlayer gaps for efficient gas separation and water desalination.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Controlled nanoscale fluidic channels are crucial for resolving permeation-selectivity trade-offs in filtration and separation.
  • Natural nacre inspires bio-inspired designs for tunable material properties.

Purpose of the Study:

  • To propose and investigate bio-inspired graphene-derived membranes with tunable interlayer spacing for advanced separation applications.
  • To explore a novel interface- and strain-engineering approach for molecular sieving.

Main Methods:

  • Designing graphene-derived membranes with aligned covalent cross-links to control interlayer spacing.
  • Utilizing first-principles calculations and continuum mechanics models to analyze membrane behavior.
  • Investigating the mechanism of tension transfer via interlayer shear for gallery expansion.

Main Results:

  • Demonstrated a method to achieve controlled interlayer spacing in graphene membranes, ranging from 4 Å to 14 Å.
  • Showcased the ability to prohibit swelling while maintaining structural and mechanical stability.
  • Confirmed that the approach covers the critical size range for molecular sieving.

Conclusions:

  • The proposed bio-inspired graphene membranes offer a promising route for highly efficient gas separation and water desalination.
  • The synergetic interface- and strain-engineering approach effectively addresses the permeation-selectivity challenge.
  • This design provides a stable and tunable platform for nanoscale separation technologies.