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Ultrasound exfoliation of inorganic analogues of graphene.

Stengl V, Henych J, Slušná M, Ecorchard P - Nanoscale Res Lett (2014)

Bottom Line: The monolayer slices could potentially be prepared with a high yield (up to 100%) in a few minutes.Atomic force microscopy (AFM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) were employed to verify the quality of the exfoliation.Herein, this new method of exfoliation with ultrasound assistance for application to mono- and bilayered materials in hydrophobic and hydrophilic environments is presented.

View Article: PubMed Central - HTML - PubMed

Affiliation: Materials Chemistry Department, Institute of Inorganic Chemistry AS CR, v,v,i,, ŘeŽ 250 68, Czech Republic. stengl@iic.cas.cz.

ABSTRACT
High-intensity ultrasound exfoliation of a bulk-layered material is an attractive route for large-scale preparation of monolayers. The monolayer slices could potentially be prepared with a high yield (up to 100%) in a few minutes. Exfoliation of natural minerals (such as tungstenite and molybdenite) or bulk synthetic materials (including hexagonal boron nitride (h-BN), hexagonal boron carbon nitride (h-BCN), and graphitic carbon nitride (g-C3N4)) in liquids leads to the breakdown of the 3D graphitic structure into a 2D structure; the efficiency of this process is highly dependent upon the physical effects of the ultrasound. Atomic force microscopy (AFM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) were employed to verify the quality of the exfoliation. Herein, this new method of exfoliation with ultrasound assistance for application to mono- and bilayered materials in hydrophobic and hydrophilic environments is presented.

No MeSH data available.


The structures of inorganic analogues of graphene - MoS2, WS2, g-C3N4, h-BN, and h-BCN.
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Figure 1: The structures of inorganic analogues of graphene - MoS2, WS2, g-C3N4, h-BN, and h-BCN.

Mentions: Mechanical exfoliation, called the ‘scotch tape method’ [1], was the first method used for the preparation of single-layer graphene from natural graphite. Subsequently, through the utilization of this principle, other layered materials that are so-called inorganic analogues of graphene (IAG), such as MoS2[2,3] and WS2[4], hexagonal boron nitride (h-BN) [5], hexagonal boron carbon nitride (h-BCN), and graphitic carbon nitride (g-C3N4) (see Figure 1), were exfoliated. The current state of knowledge about the synthesis of IAGs is gathered below.


Ultrasound exfoliation of inorganic analogues of graphene.

Stengl V, Henych J, Slušná M, Ecorchard P - Nanoscale Res Lett (2014)

The structures of inorganic analogues of graphene - MoS2, WS2, g-C3N4, h-BN, and h-BCN.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4022084&req=5

Figure 1: The structures of inorganic analogues of graphene - MoS2, WS2, g-C3N4, h-BN, and h-BCN.
Mentions: Mechanical exfoliation, called the ‘scotch tape method’ [1], was the first method used for the preparation of single-layer graphene from natural graphite. Subsequently, through the utilization of this principle, other layered materials that are so-called inorganic analogues of graphene (IAG), such as MoS2[2,3] and WS2[4], hexagonal boron nitride (h-BN) [5], hexagonal boron carbon nitride (h-BCN), and graphitic carbon nitride (g-C3N4) (see Figure 1), were exfoliated. The current state of knowledge about the synthesis of IAGs is gathered below.

Bottom Line: The monolayer slices could potentially be prepared with a high yield (up to 100%) in a few minutes.Atomic force microscopy (AFM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) were employed to verify the quality of the exfoliation.Herein, this new method of exfoliation with ultrasound assistance for application to mono- and bilayered materials in hydrophobic and hydrophilic environments is presented.

View Article: PubMed Central - HTML - PubMed

Affiliation: Materials Chemistry Department, Institute of Inorganic Chemistry AS CR, v,v,i,, ŘeŽ 250 68, Czech Republic. stengl@iic.cas.cz.

ABSTRACT
High-intensity ultrasound exfoliation of a bulk-layered material is an attractive route for large-scale preparation of monolayers. The monolayer slices could potentially be prepared with a high yield (up to 100%) in a few minutes. Exfoliation of natural minerals (such as tungstenite and molybdenite) or bulk synthetic materials (including hexagonal boron nitride (h-BN), hexagonal boron carbon nitride (h-BCN), and graphitic carbon nitride (g-C3N4)) in liquids leads to the breakdown of the 3D graphitic structure into a 2D structure; the efficiency of this process is highly dependent upon the physical effects of the ultrasound. Atomic force microscopy (AFM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) were employed to verify the quality of the exfoliation. Herein, this new method of exfoliation with ultrasound assistance for application to mono- and bilayered materials in hydrophobic and hydrophilic environments is presented.

No MeSH data available.