摘要:
Disclosed herein are methods of preparing bitumen for transport, apparatus for preparing bitumen for transport, methods of transporting bitumen, and transportation-ready forms of bitumen. Instead of relying on exogenous components to induce bitumen solidification, the methods and apparatus of the present disclosure reorganize bituminous materials derived from the same origin into core-shell bitumen microcapsules, such that relatively low solubility components (e.g. asphaltenes) encapsulate relatively high solubility components (e.g. maltenes). Importantly, the bitumen microcapsules of the present disclosure are sufficiently mechanically resilient to meet one or more thresholds for midstream transportation, and they are readily fluidized for downstream processing with conventional technologies. Taken together, these aspects may ameliorate one or more challenges in achieving commercially viable bitumen solidification technologies.
摘要:
Provided are methods for forming graphene or functionalized graphene thin films. Also provided are graphene and functionalized graphene thin films formed by the methods. For example, electrophoretic deposition methods and stamping methods are used. Defect-free thin films can be formed. Patterned films can be formed. The methods can provide conformal coatings on non-planar substrates.
摘要:
The invention provides a method of functionalizing the sidewalls of a plurality of carbon nanotubes with oxygen moieties, the method comprising: exposing a carbon nanotube dispersion to an ozone/oxygen mixture to form a plurality of ozonized carbon nanotubes; and contacting the plurality of ozonized carbon nanotubes with a cleaving agent to form a plurality of sidewall-functionalized carbon nanotubes.
摘要:
The present invention provides a heterostructure which includes a carbon nanotube covalently linked to at least one nanocrystal. Methods for making such heterostructures, and methods for modifying the physical properties of nanotubes are also provided.
摘要:
A method for positioning carbon nanotubes on a substrate, the substrate including a first electrode and a second electrode thereon, the second electrode being positioned oppositely from the first electrode; the method includes: applying a first AC voltage across the first and second electrodes; providing a first resistance in series with the first AC voltage; and introducing a solution including at least one carbon nanotube; wherein, when the first AC voltage is applied through the first resistance across the first and second electrodes, the at least one carbon nanotube attaches to the first and second electrodes. Another aspect of the invention includes providing a metallic area between the first and second electrodes. In an additional aspect of the invention, the substrate includes a third electrode and a fourth electrode thereon, the fourth electrode being positioned oppositely from the third electrode, the third electrode being positioned adjacent to the first electrode; the method further includes: removing the first AC voltage; applying a second AC voltage to the third and fourth electrodes, the second AC voltage causing the first and second electrodes to have a floating potential; and providing a second resistance in series with the second AC voltage; wherein when the first AC voltage is applied across the first and second electrodes, the first AC voltage causes the third and fourth electrodes to have a floating potential, and wherein, when the second AC voltage is applied through the second resistance across the third and fourth electrodes, a second carbon nanotube attaches to the third and fourth electrodes.
摘要:
Provided are methods for forming graphene or functionalized graphene thin films. Also provided are graphene and functionalized graphene thin films formed by the methods. For example, electrophoretic deposition methods and stamping methods are used. Defect-free thin films can be formed. Patterned films can be formed. The methods can provide conformal coatings on non-planar substrates.
摘要:
The present invention provides a method of differentiating metallic carbon nanotubes from semiconducting carbon nanotubes. The method comprising providing a nanotube dispersion, wherein the nanotube dispersion comprises a plurality of carbon nanotubes, osmium tetroxide, or ruthenium tetroxide, and a solvent; and irradiating the nanotube dispersion with ultraviolet light, wherein the metallic carbon nanotubes are osmylated, or ruthenylated, thereby differentiating the metallic carbon nanotubes from the semiconducting carbon nanotubes.
摘要:
The present invention provides a fused heterostructure comprising a carbon nanotube and at least one nanocrystal, wherein the nanocrystal is attached by a covalent linkage to at least one oxygen moiety on the nanotube, and wherein there is no intermediary linker between the nanotube and the nanocrystal.
摘要:
The invention provides an adduct comprising a carbon nanotube and a transitional metal coordination complex, wherein the metal of the complex is attached by a covalent linkage to at least one oxygen moiety on the nanotube.