Substrate-free crystalline 2d bismuthene

Patent metadata

Field	Value
Publication number	US-2020180974-A1
Application number	US-201916685114-A
Country	US
Kind code	A1
Filing date	Nov 15, 2019
Priority date	Dec 6, 2018
Publication date	Jun 11, 2020
Grant date	—

Abstract

The present disclosure generally relates to compositions comprising substrate-free crystalline 2D bismuthene, and the method of making and using the substrate-free crystalline 2D bismuthene.

First claim

1 . A composition comprising substrate-free crystalline 2D bismuthene nanoflakes.

2 . The composition of claim 1 , wherein the crystalline 2D bismuthene nanoflakes have single crystalline nature.

3 . The composition of claim 1 , wherein the crystalline 2D bismuthene nanoflakes have substantially equilateral triangle shape.

4 . The composition of claim 3 , wherein the length of each side of the substantially equilateral triangle shape is 0.1-100 μm.

5 . The composition of claim 1 , wherein the crystalline 2D bismuthene nanoflakes have multilayer structure with a thickness of 0.1-30 nm.

6 . The composition of claim 1 , wherein the crystalline 2D bismuthene nanoflakes are characterized by an X-ray diffraction pattern (CuKα radiation, λ=1.54056 A) comprising a peak at 26.16 (2θ±0.1°), and optionally one or more peaks selected from the group consisting of 36.99, 38.64, 47.67, and 55.14 (2θ±0.1°).

7 . A method of preparing substrate-free crystalline 2D bismuthene nanoflakes, wherein the method comprises reductive reaction of NaBiO 3 with a capping polymer and a polyol.

8 . The method of claim 7 , wherein the method comprises steps:
dissolving the capping polymer in the polyol to form a mixture of the capping polymer and the polyol; heating the mixture to an elevated temperature for a period of time and then cooling the mixture to ambient temperature; adding NaBiO 3 to the mixture of the capping polymer and the polyol, and heating the newly formed mixture to an elevated temperature for a period of time; and cooling the reaction mixture to ambient temperature to provide the substrate-free crystalline 2D bismuthene nanoflakes.

9 . The method of claim 7 , wherein the polyol is ethylene glycol, the capping polymer is polyvinylpyrrolidone (PVP).

Assignees

• Purdue Research Foundation

Inventors

• Wu Wenzhuo
• Wang Yixiu

Classifications

• Y10T428/2982

  Particulate matter [e.g., sphere, flake, etc.] · CPC title

• C30B29/60

  characterised by shape · CPC title

• C30B29/02

  Elements · CPC title

• C30B7/14

  the crystallising materials being formed by chemical reactions in the solution · CPC title

• C01P2004/62

  Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title