摘要:
A population of nanocrystals including a core comprising a first semiconductor material comprising one or more elements of Group IIIA of the Periodic Table of Elements and one or more elements of Group VA of the Periodic Table of Elements, and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the nanocrystal is capable of emitting light having a photoluminescence quantum efficiency of at least about 30% upon excitation. Also disclosed is a nanocrystal comprising a nanocrystal core and a shell comprising a semiconductor material comprising at least three chemical elements and obtainable by a process comprising adding a precursor for at least one of the chemical elements of the semiconductor material from a separate source to a nanocrystal core while simultaneously adding amounts of precursors for the other chemical elements of the semiconductor material. Devices including nanocrystals are disclosed.
摘要:
An aerogel molded body includes a plurality of aerogel particles and adhesive bonding the plurality of aerogel particles. The adhesive includes layers of layer-foaming adhesive covering the plurality of aerogel particles, and particles of particle-forming adhesive adhering to the plurality of aerogel particles. The layer-forming adhesive is preferably water-soluble adhesive. The particle-forming adhesive is preferably powdery adhesive. It is possible to obtain thermal insulators with increased strength and excellent thermal insulating properties.
摘要:
Acicular boehmite nanoparticles, methods of making acicular boehmite nanoparticles, and composite materials that contain acicular boehmite nanoparticles are described. The acicular boehmite nanoparticles are prepared in a continuous hydrothermal reactor from a feedstock solution containing a soluble aluminum-containing precursor.
摘要:
A method of continuously generating a joined structure: comprising a cube- or quadratic prism-shaped rock salt-type oxide nanoparticle and a metal nanoparticle, and having high crystallinity, in a gas phase, the method is characterized in that alloy nanoparticles composed of a noble metal and a base metal and having a particle size of 1 to 100 nm are generated in an inert gas; and brought into contact with a hot oxidizing gas, while the nanoparticles are heated at a high temperature together with the inert gas, to oxidize a base metal component in the alloy nanoparticles floating in the gas, and to simultaneously allow phase separation of the metal component, whereby the joined structure.
摘要:
An oxide catalyst is formed by vaporizing a quantity of at least one precursor material or catalyst material thereby forming a vapor cloud. The vapor cloud is quenched forming precipitate nanoparticles. The nanoparticles are impregnated onto supports. The supports are able to be used in existing heterogeneous catalysis systems. A system for forming oxide catalysts comprises means for vaporizing a quantity of at least one precursor material or at least one catalyst material, quenching the resulting vapor cloud and forming precipitate nanoparticles. The system further comprises means for supports with the nanoparticles.
摘要:
The present invention relates to a nano-graphite plate structure with N graphene layers stacked together, where N is 30 to 300. The nanometer nano-graphite structure has a tap density of 0.1 g/cm3 to 0.01 cm3, a thickness of 10 nm to 100 nm, and a lateral dimension of 1 μm to 100 μm. The ratio of the lateral dimension to the thickness is between 10 and 10,000. The oxygen content is less than 3 wt %, and the carbon content is larger than 95 wt %. The nano-graphite plate structure has both the excellent features of the graphene and the original advantages of easy processability of the natural graphite so as to be broadly used in various application fields.
摘要翻译:本发明涉及N个石墨烯层叠在一起的纳米石墨板结构,其中N为30至300.纳米纳米石墨结构的振实密度为0.1g / cm 3至0.01cm 3,厚度为10nm至 100nm,横向尺寸为1μm〜100μm。 横向尺寸与厚度之比为10至10,000。 氧含量小于3重量%,碳含量大于95重量%。 纳米石墨板结构具有石墨烯的优异特征和天然石墨易加工性的原始优点,广泛应用于各种应用领域。
摘要:
Solder spheres which can avoid blackening during transportation have a substantially uniform coating of a lubricant on the surfaces thereof. They are produced by dipping freshly prepared solder spheres in a lubricant solution with a concentration of from 10 ppm to 1000 ppm followed by collection of the spheres and drying. The lubricant is preferably selected from an aliphatic hydrocarbon lubricant, a higher fatty alcohol or acid lubricant, a fatty acid amide lubricant, a metal soap lubricant, a fatty acid ester lubricant, a fluoroplastic lubricant, a silicone lubricant, and a combination thereof.
摘要:
In certain embodiments novel nanoparticles (nanowontons) are provided that are suitable for multimodal imaging and/or therapy. In one embodiment, the nanoparticles include a first biocompatible (e.g., gold) layer, an inner core layer (e.g., a non-biocompatible material), and a biocompatible (e.g., gold) layer. The first gold layer includes a concave surface that forms a first outer surface of the layered nanoparticle. The second gold layer includes a convex surface that forms a second outer surface of the layered nanoparticle. The first and second gold layers encapsulate the inner core material layer. Methods of fabricating such nanoparticles are also provided.
摘要:
A lightweight composite having an activated surface contains a lightweight hollow core particle having cement grains which may be adhered to the hollow core or embedded in the surface of the hollow core. The hollow core particle may be prepared from calcium carbonate and a mixture of clay, such as bentonite, and a glassy inorganic material, such as glass spheres, glass beads, glass bubbles, borosilicate glass and fiberglass.
摘要:
The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.