Exfoliation Technique
Exfoliation Technique - Related Videos
08:54
Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals
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Cited by 3 •
2016
A two dimensional model material of discotic zirconium phosphate was developed. The inorganic crystal with lamellar structure was synthesized by hydrothermal, reflux, and microwave-assisted methods. On exfoliation with organic molecules, layered crystals can be converted to monolayers, and nematic liquid crystal phase was formed at sufficient concentration of monolayers.
12:04
Exfoliation of Egyptian Blue and Han Blue, Two Alkali Earth Copper Silicate-based Pigments
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Cited by 34 •
2014
The preparation and exfoliation of CaCuSi4O10 and BaCuSi4O10 are described. Upon stirring in hot water, CaCuSi4O10 spontaneously exfoliates into monolayers, whereas BaCuSi4O10 requires ultrasonication in organic solvents. Near infrared (NIR) imaging illustrates the NIR emission properties of these materials, and aqueous dispersions of these nanomaterials are useful for solution processing.
10:41
Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
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Cited by 38 •
2016
A protocol for the liquid exfoliation of layered materials to nanosheets, their size selection and size measurement by microscopic and spectroscopic techniques is presented.
10:18
Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials
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Cited by 8 •
2019
A method for exfoliating large thin flakes of air sensitive two-dimensional materials and safely transporting them for analysis outside of a glovebox is presented.
13:44
Single-Cell Sorting of Immunophenotyped Mesenchymal Stem Cells from Human Exfoliated Deciduous Teeth
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Cited by 2 •
2023
This protocol describes the use of fluorescence-activated cell sorting of human mesenchymal stem cells using the single-cell sorting method. Specifically, the use of single-cell sorting can achieve 99% purity of the immunophenotyped cells from a heterogeneous population when combined with a multiparametric flow cytometry-based approach.
FAQs
The technique separates sheets by supplying enough mechanical or chemical driving force to overcome weak interlayer attractions. Mechanical cleavage directly pulls layers apart, whereas liquid-phase sonication assists separation in a liquid. Chemical intercalation inserts species between layers, and controlled chemical treatment changes the interlayer environment. These routes provide different levels of control over sheet separation and material condition.
Layer thickness, structural defects, and stability strongly influence the behavior obtained after separation. Thinner sheets can expose more surface area, while defects may alter electrical, optical, or catalytic responses. Poor stability can reduce reproducibility during handling or use. Controlling these features is therefore necessary when comparing samples or designing materials for specific chemistry and materials-science applications.
Separating a layered solid can reveal properties that are less accessible in the bulk material. The resulting sheets provide greater surface area and may show tunable electrical, optical, and catalytic behavior. These changes arise from the increased exposure of sheet surfaces and the influence of layer thickness and defects, making exfoliated materials useful for studying structure-property relationships.
Mechanical cleavage, liquid-phase sonication, chemical intercalation, and controlled chemical treatment separate layers through different mechanisms. Cleavage applies a direct physical force, while sonication promotes separation in a liquid environment. Intercalation places chemical species between layers, and chemical treatment modifies the material to assist delamination. The chosen route affects control over thickness, defects, and stability.
A practical workflow begins by selecting a layered solid and an appropriate separation route. The material may then undergo mechanical cleavage, liquid-phase sonication, chemical intercalation, or controlled chemical treatment. After separation, researchers assess layer thickness, defects, and stability because these characteristics determine whether the product is suitable for its intended experiment or application.
Exfoliated materials support investigations in nanomaterials, energy storage, sensors, catalysis, and electronic devices. Their high surface area can provide more accessible material for interfacial or catalytic studies, while tunable electrical and optical behavior supports device-oriented research. Chemistry contributes methods for intercalation and controlled treatment, as well as evaluation of how processing changes material performance.