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Related Concept Videos

Two-dimensional Gel Electrophoresis01:22

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Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
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Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
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Two-dimensional nanochannel membranes for molecular and ionic separations.

Shaofei Wang1, Leixin Yang2, Guangwei He3

  • 1Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China. zhyjiang@tju.edu.cn and Biological and Environmental Science and Engineering Division (BESE), Advanced Membranes and Porous Materials Center (AMPM), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia. suzana.nunes@kaust.edu.sa.

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Summary

Two-dimensional nanosheets form advanced nanochannel membranes for precise molecular and ionic separations. This review details their construction, regulation, and applications in gas, liquid, and ion separation technologies.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Separation Science

Background:

  • Two-dimensional (2D) nanosheets offer unique properties due to their atomic thickness.
  • These materials are building blocks for two-dimensional nanochannel membranes (2DNCMs) enabling through-plane and interlayer transport.
  • Nanochannel construction and microenvironment regulation are crucial for membrane performance.

Purpose of the Study:

  • To review recent advances in 2D nanosheet-based nanochannel membranes (2DNCMs).
  • To discuss synthesis methods for 2D nanosheets and high-performance 2DNCMs.
  • To highlight strategies for regulating nanochannel microenvironments and applications.

Main Methods:

  • Introduction of various porous and nonporous 2D nanosheets and their derived nanochannels.
  • Discussion of top-down and bottom-up synthesis approaches for 2D nanosheets and 2DNCMs.
  • Focus on nanochannels derived from nonporous, intrinsically porous, and perforated nanosheets.

Main Results:

  • Detailed discussion on strategies for regulating the physical and chemical microenvironments within nanochannels.
  • Presentation of representative applications in molecular separations (gas and liquid) and ionic separations.
  • Categorization of nanochannels based on nonporous, intrinsically porous, and perforated nanosheets.

Conclusions:

  • 2DNCMs show significant potential for advanced separation technologies.
  • Effective regulation of nanochannel properties is key to optimizing performance.
  • Future research should address current challenges and explore new perspectives in 2DNCM development.