Chemical manufacture of nanostructured materials
AssigneeThe Regents of the University of California
InventorsJulia J Mack, Lisa M. Viculis, Richard B Kaner
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Abstract
A low temperature chemical route to efficiently produce nanomaterials is described. The nanomaterials are synthesized by intercalating ions into layered compounds, exfoliating to create individual layers and then sonicating to produce nanotubes, nanorods, nanoscrolls and/or nanosheets. It is applicable to various different layered inorganic compounds (for example, bismuth selenides/tellurides, graphite, and other metal complexes, particularly transition metal dichalcogenides compounds including oxygen, sulfur, tellurium or selenium).
Claims16
A process for the formation of nanostructured materials comprising:
- a. providing a layered compound or element,
- b. causing an intercalating material to penetrate between layers of the layered compound or element to form an intercalated composition, and
- c. exfoliating the intercalated composition by placing said intercalated composition in a water or alcohol solution and forming a dispersion of nanostructures
- wherein the element is carbon and the intercalating compound is selected from the group consisting of alkali metals, alkaline earth metals, Eu, Yb, Tl, Sm and Tm.
A process for the formation of nanostructured materials comprising:
- a. providing a layered compound or element,
- b. causing an intercalating material to penetrate between layers of the layered compound or element to form an intercalated composition, and
- c. exfoliating the intercalated composition by placing said intercalated composition in a solution and forming a dispersion of nanostructures
- wherein the element is carbon in the form of graphite and the intercalating material is potassium.
A process for the formation of nanostructured materials comprising:
- a. providing a layered compound or element,
- b. causing an intercalating material to penetrate between layers of the layered compound or element to form an intercalated composition, and
- c. exfoliating the intercalated composition by placing said intercalated composition in a solution and forming a dispersion of nanostructures
- wherein the layered element is carbon, the intercalating material is selected from the group consisting of Li, Na, Ki, Rb, Cs, Ca, Ba, Sr, Eu, Yb, Sm, Tm or a combination thereof and the exfoliating material is selected from the group consisting of water, water containing organic solvents, alcohols and hydroxylic solvents or a combination thereof.
A process for the formation of nanostructured materials wherein the nanostructured material is carbon nanosheets comprising:
- a. providing a layered compound or element,
- b. causing an intercalating material to penetrate between layers of the layered compound or element to form an intercalated composition, and
- c. exfoliating the intercalated composition by placing said intercalated composition in a solution and forming a dispersion of nanostructures, comprising
- d. mixing graphite powder with potassium and sealing the mixture in a sealed, oxygen free vessel, followed by heating at 200° C. for 16 hours to form an intercalated graphite composition, and
- e. placing the intercalated graphite composition in ethanol causing the intercalated graphite composition to exfoliate into individual layers forming carbon nanosheets.
Dependencies are inferred from the claim text.