摘要:
The present invention is directed to nanofiber yarns, ribbons, and sheets; to methods of making said yarns, ribbons, and sheets; and to applications of said yarns, ribbons, and sheets. In some embodiments, the nanotube yarns, ribbons, and sheets comprise carbon nanotubes. Particularly, such carbon nanotube yarns of the present invention provide unique properties and property combinations such as extreme toughness, resistance to failure at knots, high electrical and thermal conductivities, high absorption of energy that occurs reversibly, up to 13% strain-to-failure compared with the few percent strain-to-failure of other fibers with similar toughness, very high resistance to creep, retention of strength even when heated in air at 450°C for one hour, and very high radiation and UV resistance, even when irradiated in air. Furthermore these nanotube yarns can be spun as one micron diameter yarns and plied at will to make two-fold, four-fold, and higher fold yarns. Additional embodiments provide for the spinning of nanofiber sheets having arbitrarily large widths. In still additional embodiments, the present invention is directed to applications and devices that utilize and/or comprise the nanofiber yarns, ribbons, and sheets of the present invention.
摘要:
The present invention generally provides compositions including carbon- containing molecules, and related methods. In some cases, the present invention relates to aromatic molecules comprising functional groups bonded to the aromatic portion of the molecule, including nonplanar portions of the molecules. Methods of the invention may provide the ability to introduce a wide range of functional groups to carbon- containing molecules. In some cases, methods of the invention may be performed using relatively mild reaction conditions, such as relatively low temperature, low pressure, and/or in the absence of strong acids or strong bases. The present invention may provide a facile and modular approach to synthesizing molecules that may be useful in various applications including photovoltaic devices, sensors, and electrodes (e.g., for electrocatalysis).
摘要:
Artificial dielectrics using nanostructures, such as nanowires, are disclosed. In embodiments, artificial dielectrics using other nanostructures, such as nanorods, nanotubes or nanoribbons and the like are disclosed. The artificial dielectric includes a dielectric material with a plurality of nanowires (or other nanostructures) embedded within the dielectric material. Very high dielectric constants can be achieved with an artificial dielectric using nanostructures. The dielectric constant can be adjusted by varying the length, diameter, carrier density, shape, aspect ration, orientation and density of the nanostructures. Additionally, a controllabe artificial dielectric using nanostructures, such as nanowires, is disclosed in which the dielectric constant can be dynamically adjusted by applying an electric field to the controllable artificial dielectric. A wide range of electronic devices can use artificial dielectrics with nanostructures to improve performance. Example devices include, capacitors thin film transistors, other types of thin film electronic devices, microstrip devices, surface acoustic wave (SAW) filters, other types of filters, and radar attenuating materials (RAM).
摘要:
The present invention is generally directed to catalyzed hot stamp methods for polishing and/or patterning carbon nanotube-containing substrates. In some embodiments, the substrate, as a carbon nanotube fiber end, is brought into contact with a hot stamp (typically at 200-800 °C), and is kept in contact with the hot stamp until the morphology/patterns on the hot stamp have been transferred to the substrate. In some embodiments, the hot stamp is made of material comprising one or more transition metals (Fe, Ni, Co, Pt, Ag, Au, etc.), which can catalyze the etching reaction of carbon with H 2 , CO 2 , H 2 O, and/or O 2 . Such methods can (1) polish the carbon nanotube-containing substrate with a microscopically smooth finish, and/or (2) transfer pre-defined patterns from the hot stamp to the substrate. Such polished or patterned carbon nanotube substrates can find application as carbon nanotube electrodes, field emitters, and field emitter arrays for displays and electron sources.
摘要翻译:本发明一般涉及用于研磨和/或构图含碳纳米管的基底的催化热印方法。 在一些实施例中,作为碳纳米管纤维端的衬底与热压印(通常在200-800℃)接触,并且与热压印件保持接触,直到热标记上的形态/图案 已经转移到基底。 在一些实施例中,热压印由包含一种或多种过渡金属(Fe,Ni,Co,Pt,Ag,Au等)的材料制成,其可以催化碳与H 2的蚀刻反应, CO 2 CO 2,H 2 O和/或O 2。 这样的方法可以(1)用微观平滑光洁度抛光含碳纳米管的基底,和/或(2)将预定义的图案从热印刷转印到基底上。 这种抛光或图案化的碳纳米管基底可以用作碳纳米管电极,场致发射体和用于显示器和电子源的场发射极阵列。
摘要:
Disclosed herein is a nanostructured material comprising carbon nanotubes fused together to form a three-dimensional structure. Methods of making the nanostructured material are also disclosed. Such methods include a batch type process, as well as multi-step recycling methods or continuous single-step methods. A wide range of articles made from the nanostructured material, including fabrics, ballistic mitigation materials, structural supports, mechanical actuators, heat sink, thermal conductor, and membranes for fluid purification is also disclosed.
摘要:
The present invention relates to a cosmetic composition comprising the association of certain tocopherols bn with at least one melanistic pigment derived from natural or synthetic sources, in a cosmetically acceptable vehicle as well as a method for the protection of the skin, the mucuous membranes, the hair and cosmetic compositions against free radicals.
摘要:
Facile ways towards the integration of the regioregular poly(3-alkylthiophene)s onto carbon nanotubes, providing multifunctional materials that combine the extraordinary properties of the carbon nanotubes with those of regioregular poly(3-alkylthiophene)s, are presented.
摘要:
Artificial dielectrics using nanostructures, such as nanowires, are disclosed. In embodiments, artificial dielectrics using other nanostructures, such as nanorods, nanotubes or nanoribbons and the like are disclosed. The artificial dielectric includes a dielectric material with a plurality of nanowires (or other nanostructures) embedded within the dielectric material. Very high dielectric constants can be achieved with an artificial dielectric using nanostructures. The dielectric constant can be adjusted by varying the length, diameter, carrier density, shape, aspect ration, orientation and density of the nanostructures. Additionally, a controllabe artificial dielectric using nanostructures, such as nanowires, is disclosed in which the dielectric constant can be dynamically adjusted by applying an electric field to the controllable artificial dielectric. A wide range of electronic devices can use artificial dielectrics with nanostructures to improve performance. Example devices include, capacitors thin film transistors, other types of thin film electronic devices, microstrip devices, surface acoustic wave (SAW) filters, other types of filters, and radar attenuating materials (RAM).
摘要:
Carbon nanotubes have been reversibly and readily oxidized and reduced with common chemicals in solution, thereby allowing the nanotubes to be used as catalysts for chemical reactions and as stable charge storage devices.