Substrate-free crystalline 2D nanomaterials

Patent metadata

Field	Value
Publication number	US-11685653-B2
Application number	US-202016779581-A
Country	US
Kind code	B2
Filing date	Feb 1, 2020
Priority date	Feb 1, 2019
Publication date	Jun 27, 2023
Grant date	Jun 27, 2023

Abstract

The present disclosure generally relates to compositions comprising substrate-free 2D crystalline nanomaterials of binary compounds of formula (M)x(Te)y, and the method of making and using the substrate-free crystalline 2D crystalline nanomaterial.

First claim

The invention claimed is:

1. A composition comprising a substrate-free 2D crystalline nanomaterial of a binary compound of formula (M) x (Te) y , wherein said M is Ag, and the formula is Ag 4.53 Te 3 , the 2D crystalline nanomaterial is characterized by a non-symmetric structure.

2. The composition of claim 1 , wherein the 2D crystalline nanomaterial has a monolayer or a multilayer structure with a thickness of 0.1-30 nm.

3. The composition of claim 1 , wherein said M is Ag, and the formula is Ag 4.53 Te 3 , the 2D crystalline nanomaterial is characterized by an X-ray diffraction pattern (CuKα radiation, λ=1.54056 A) comprising peaks at 25.23°, 29.27°, 34.94°, and 41.42°.

4. The composition of claim 1 , wherein the 2D crystalline nanomaterial is thermally stable having substantially no mass change up to eight- hundred degrees Celsius.

5. A method of preparing substrate-free 2D crystalline nanomaterial of claim 1 , wherein the method comprises:
providing a substrate-free 2D Tellurene crystalline nanomaterial;
preparing a suspension of the substrate-free 2D Tellurene crystalline nanomaterial in a first solvent;
providing a salt of a formula M m X n , wherein 1≤m≤6, 1≤n≤6, X is an acid radical;
preparing a suspension of the salt of the formula M m X n in a second solvent, wherein the first solvent and the second solvent may be same of different solvent;
mixing the suspension of the substrate-free 2D Tellurene and the suspension of the salt and allowing the reaction between the substrate-free 2D Tellurene and the salt; and
forming the substrate-free 2D crystalline nanomaterial having the binary compound of formula (M) x (Te) y , wherein said M is Ag, and the formula is Ag 4.53 Te 3 , the 2D crystalline nanomaterial is characterized by a non-symmetric structure.

Assignees

• Purdue Research Foundation

Inventors

• Wu Wenzhuo
• Wang Yixiu

Classifications

• C01P2002/74

  by peak-intensities or a ratio thereof only · CPC title

• C01P2002/20

  Two-dimensional structures · CPC title

• C01B19/007 Primary

  Tellurides or selenides of metals (C01B19/002 takes precedence) · CPC title