Abstract:
The present invention provides forms of cesium compounds, more specifically cesium oxides, with higher stability and ease of handling, suitable to be used in electronic devices, e.g. photocathodes and NEA devices. The invention also provides a novel environmental chamber for use with an electron microscope.
Abstract:
The present invention provides an article, at least part of it being coated by inorganic fullerene-like (IF) nanoparticles or composite containing such nanoparticles. Preferably, the invention provides an article made of metal, for use in dentistry or medicine e.g. archwire, needle or catheter, having a friction-reducing film, and methods for coating such articles with a friction-reducing film.
Abstract:
The invention provides a multilayered nanostructure comprising at least one first layered nanotube being of at least one first inorganic material and having an inner void holding at least one second layered nanotube being of at least one second inorganic material; wherein said at least one first nanotube and at least one second nanotube differ in at least one of structure and material. The invention further provides processes for the manufacture of multilayered nanostructures and uses thereof.
Abstract:
A lubricating and shock absorbing materials are described, which are based on nanoparticles having the formula A 1-x -B x -chalcogenide. Processes for their manufacture are also described.
Abstract:
Fullerene-like (IF) nanostructures of the formula A1-x-Bx-chalcognide are described. A being a metal or transition metal or an alloy of metals and/or transition metals, B being a metal or transition metal B different from that of A and x being ? 0.3. A process for their manufacture and their use for modifying the electronic character of A-chalcognide are described.
Abstract:
The present invention provides a process for obtaining fullerene-like metal chalcogenide nanoparticles, comprising feeding a metal precursor selected from metal halide, metal carbonyl, organo-metallic compound and metal oxyhalide vapor into a reaction chamber towards a reaction zone to interact with a flow of at least one chalcogen material in gas phase, the temperature conditions in said reaction zone being such to enable the formation of the fullerene-like metal chalcogenide nanoparticles product. The present invention further provides novel IF metal chalcogenides nanoparticles with spherical shape and optionally having a very small or no hollow core exhibiting excellent tribological behaviour. The present invention further provides an apparatus for preparing various IF nanostructures.
Abstract:
The invention provides a multilayered nanostructure comprising at least one first layered nanotube being of at least one first inorganic material and having an inner void holding at least one second layered nanotube being of at least one second inorganic material; wherein said at least one first nanotube and at least one second nanotube differ in at least one of structure and material. The invention further provides processes for the manufacture of multilayered nanostructures and uses thereof.
Abstract:
Nanotubes of transition metal chalcogenides as long as 0.2-20 microns or more, perfect in shape and of high crystallinity, are synthesized from a transition metal material, e.g., the transition metal itself or a substance comprising a transition metal such as an oxide, water vapor and a H 2 X gas or H 2 gas and X vapor, wherein X is S, Se or Te, by a two-step or three-step method. The transition metal chalcogenide is preferably WS 2 or WSe 2 . Tips for scanning probe microscopy can be prepared from said long transition metal chalcogenide nanotubes.
Abstract:
The present invention provides a new composite material comprising a porous matrix made of metal, metal alloy or semiconducting material and hollow fullerene-like nanoparticles of a metal chalcogenide compound or mixture of such compounds. The composite material is characterized by having a porosity between about 10% and about 40%. The amount of the hallow nanoparticles in the composite material is 1-20 wt. %.