IP Library › Patent Application 17008834
Patent Application
App. No. 17/008,834

SUBSTRATE-FREE 2D TELLURENE

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Quick Facts
Patent No.
US None
App. No.
17/008,834
Abstract

The present disclosure generally relates to compositions comprising substrate-free 2D tellurene crystals, and the method of making and using the substrate-free 2D tellurene crystals. The 2D tellurene crystals of the present disclosure are characterized by an X-ray diffraction pattern (CuKα radiation, λ=1.54056 A) comprising a peak at 23.79 (2θ±0.1°) and optionally one or more peaks selected from the group consisting of 41.26, 47.79, 50.41, and 64.43 (2θ±0.1°).

Claims (15)

1 . A composition comprising substrate-free 2D tellurene crystals.

2 . The composition of claim 1 , wherein the 2D tellurene crystals have a lateral length from 0.1-500 μm.

3 . The composition of claim 2 , wherein the 2D tellurene crystals have a lateral length from 0.1-100 μm.

4 . The composition of claim 1 , wherein the 2D tellurene crystals have a thickness from 0.5-250 nm.

5 . The composition of claim 4 , wherein the 2D tellurene crystals have a thickness from 0.5-100 nm.

6 . The composition of claim 1 , wherein the 2D tellurene crystals comprises 2D tellurene single crystals.

7 . The composition of claim 1 , wherein the 2D tellurene crystals comprises mono layer 2D tellurene crystals.

8 . The composition of claim 1 , wherein the 2D tellurene crystals comprises two or more layers of 2D tellurene crystals.

9 . The composition of claim 1 , wherein the 2D tellurene crystals are characterized by an X-ray diffraction pattern (CuKα radiation, λ=1.54056 A) comprising a peak at 23.79 (2θ±0.1°) and optionally one or more peaks selected from the group consisting of 41.26, 47.79, 50.41, and 64.43 (2θ±0.1°).

10 . A method of preparing substrate-free 2D tellurene crystals, wherein the method comprises reacting sodium tellurite (Na 2 TeO 3 ) and hydrazine (N 2 H 4 ) in an alkaline condition (pH >7) with the presence of polyvinylpyrrolidone (PVP).

11 . The method of claim 10 , wherein the mole ratio of Na 2 TeO 3 /PVP is 10-100:1.

12 . The method of claim 10 , wherein the reaction temperature is 120-250° C.

13 . The method of claim 10 , wherein the reaction time is at least 1 hours.

14 . The method of claim 11 , wherein acetone is added to the as-synthesized 2D tellurene crystals to provide 2D tellurene crystals with a thickness of 0.5-10 nm.

15 . The method of claim 11 , wherein NaOH is added to the as-synthesized 2D tellurene crystals to provide 2D tellurene crystals with a thickness of 0.5-10 nm.