Abstract:
A tank is provided that reduces sloshing pressures in the corner sections of a tank, such as an LNG membrane tank. The tank includes a sloshing impact reduction system placed in selected corner sections within the tank. The system serves as a slosh attenuation system, and reduces the severity of the corner geometry and improves the flow of fluids into the tank corner. In one embodiment, an impermeable structure is disposed in an internal corner section of the tank. The impermeable structure may be a triangular planar surface, or a non-planar structural surface. The non-planar structural surface may be a concave surface or other curved surface. In another arrangement, a permeable structure is placed in an internal corner section of the tank. Such a permeable structure would enable fluid to pass through the device, but would reduce the fluid velocities and accelerations via friction or eddies. The permeable structure may be either rigid or flexible.
Abstract:
A method for forming self-assembled patterns on a substrate surface is provided. First, a block copolymer layer, which comprises a block copolymer having two or more immiscible polymeric block components, is applied onto a substrate that comprises a substrate surface with a trench therein. The trench specifically includes at least one narrow region flanked by two wide regions, and wherein the trench has a width variation of more than 50%. Annealing is subsequently carried out to effectuate phase separation between the two or more immiscible polymeric block components in the block copolymer layer, thereby forming periodic patterns that are defined by repeating structural units. Specifically, the periodic patterns at the narrow region of the trench are aligned in a predetermined direction and are essentially free of defects. Block copolymer films formed by the above-described method as well as semiconductor structures comprising such block copolymer films are also described.
Abstract:
A method in effectuating the redirection of light which is propagated within a waveguide, and which eliminates the necessity for a bending of the waveguide, or the drawbacks encountered in directional changes in propagated light involving the need for sharp curves of essentially small-sized radii, which would resultingly lead to excessive losses in light. In this connection, the method relates to the fabricating and the provision of a wire-grid polarization beam splitter within an optical waveguide, which utilizes a diblock copolymer template to formulate the wire-grid.
Abstract:
A method for forming self-assembled patterns on a substrate surface is provided. First, a block copolymer layer, which comprises a block copolymer having two or more immiscible polymeric block components, is applied onto a substrate that comprises a substrate surface with a trench therein. The trench specifically includes at least one narrow region flanked by two wide regions, and wherein the trench has a width variation of more than 50%. Annealing is subsequently carried out to effectuate phase separation between the two or more immiscible polymeric block components in the block copolymer layer, thereby forming periodic patterns that are defined by repeating structural units. Specifically, the periodic patterns at the narrow region of the trench are aligned in a predetermined direction and are essentially free of defects. Block copolymer films formed by the above-described method as well as semiconductor structures comprising such block copolymer films are also described.
Abstract:
A device comprising a doped semiconductor nano-component and a method of forming the device are disclosed. The nano-component is one of a nanotube, nanowire or a nanocrystal film, which may be doped by exposure to an organic amine-containing dopant. Illustrative examples are given for field effect transistors with channels comprising a lead selenide nanowire or nanocrystal film and methods of forming these devices.
Abstract:
A magnetic-field sensor device comprises at least two electrodes; an insulating layer separating the at least two electrodes; at least one layer of chemically-synthesized magnetic nanoparticles disposed at or above a level with the insulating layer, and disposed between the at least two electrodes; and an organic spacer surrounding each of the chemically-synthesized magnetic nanoparticles. A deviation between diameters of different ones of the nanoparticles is less than 15%. Moreover, the chemically-synthesized magnetic nanoparticles range in size between 2 nm and 20 nm in diameter.
Abstract:
A structure and method for improving the spatial resolution of a scanning probe microscope (SPM) tip, which has been coated with a layer of chemically-synthesized nanoparticles. The nanoparticles are either single-species or heterogeneous, such that the single-species nanoparticles can be either ferromagnetic, paramagnetic, superparamagnetic, antiferromagnetic, ferrimagnetic, magneto-optic, ferroelectric, piezoelectric, superconducting, semiconducting, magnetically-doped semiconducting, insulating, fluorescent, or chemically catalytic. The layer of nanoparticles is at least two nanoparticles thick, or alternatively, is a single layer of nanoparticles thick, or alternatively, is a single layer of nanoparticles thick and covers only the tip apex portion of the tip, or alternatively, only a single nanoparticle is affixed to the tip apex. Alternatively, the layer of nanoparticles is transformed into an electrically-continuous magnetic film by annealing at a high temperature.
Abstract:
The invention is directed to a method of positioning nanoparticles on a patterned substrate. The method comprises providing a patterned substrate with selectively positioned recesses, and applying a solution or suspension of nanoparticles to the patterned substrate to form a wetted substrate. A wiper member is dragged across the surface of the wetted substrate to remove a portion of the applied nanoparticles from the wetted substrate, and leaving a substantial number of the remaining portion of the applied nanoparticles disposed in the selectively positioned recesses of the substrate. The invention is also directed to a method of making carbon nanotubes from the positioned nanoparticles.
Abstract:
This invention relates generally to testing apparatus and methodology for measuring fluid dynamic properties of structures within fluid flows. One embodiment includes a fluid induced motion testing apparatus of the type which includes a test rig suitable for holding a test body in a fluid body. The apparatus may include any of an actuator suitable for producing a force upon the test body; a turbulence generator located in the fluid body up current from the test body suitable for generating a turbulent flow field with uniform turbulence intensity across the fluid body-test body interface, the turbulent flow field including dominate vortical structures, the axis of the vortical structures about parallel to the longitudinal axis of the test body; or a test body adjuster suitable for adjusting the test body relative to the fluid current in four or more increments, thereby enabling multiple headings of the test body to be tested against the current of the fluid body. This invention also relates to designing and constructing offshore structures and to producing hydrocarbon resources using offshore structures designed using the testing apparatus and methodology.