摘要:
Additive manufacturing includes successively forming a plurality of layers on a support. Depositing a layer from the plurality of layers includes dispensing first particles, selectively dispensing second particles in selected regions corresponding to a surface of the object, and fusing at least a portion of the layer. The layer has the first particles throughout and the second particles in the selected regions. Alternatively or in addition, forming the plurality of layers includes depositing multiple groups of layers. Depositing a group of layers includes, for each layer in the group of layers dispensing a feed material to provide the layer, and after dispensing the feed material and before dispensing a subsequent layer fusing a selected portion of the layer. After all layers in the group of layers are dispensed, a volume of the group of layers that extends through all the layers in the group of layers is fused.
摘要:
A semiconductor processing system includes a vacuum chamber, a gas source configured to supply a gas to the chamber, a platen having a top surface in the chamber to support a substrate, the platen including a conductive plate, a robot to transport the substrate onto and off of the platen, a first plurality of lamps disposed below the top surface of the platen to heat the platen, and an RF power source to generate a plasma in the chamber above the platen.
摘要:
A self-healing polymer additive includes diene (e.g. butadiene, cyclohexadiene, pentadiene, tetrahydrofuron or their derivatives) and dienophile (e.g. maleic anhydride, maleamide, conjugated carbonyls or their derivatives etc.). One polymer includes tetrahydrofuron and maleimide. Furfurylamine 12 (1-10 gm) is diluted in acetone. Under an inert atmosphere an equivalent amount of granular maleic acid is added slowly, and the reaction is allowed to take place. Resulting maleamic acid precipitates. The maleamic acid product is separated, dried and purified by re-crystallization. The maleamic (1-5 gm) acid is dissolved in acetic anhydride along with a catalytic amount of sodium acetate. The resulting solution is heated for a few hours in 80-120° C. The precipitated final product is separated, purified and dried in a vacuum. The self-healing polymer is dissolved in a solvent, and self-healing molecules are cross linked and are mixed with a polymer matric for various applications such as coatings and structural materials.
摘要:
The present invention generally relates to a method of making nanoparticles and uses thereof. In particular, the invention relates to methods of making metal nanoparticles (MNPs). The invention also relates to antimicrobial uses of the nanoparticles.
摘要:
Compositions and devices for harvesting electrical energy from mechanical and thermal energy, storing such produced energy, and sensing strain based on low cost materials and processes. In embodiments, the compositions are flexible and include a flexible polymer embedded and coated with a nanostructured piezoelectric material.
摘要:
An additive manufacturing system includes a platen having a top surface to support an object being manufactured, a feed material dispenser to deliver a plurality of successive layers of feed material over the platen, an energy source positioned above the platen to fuse at least a portion of an outermost layer of feed material, and a coolant fluid dispenser to deliver a coolant fluid onto the outermost layer of feed material after at least a portion of the outermost layer has been fused.
摘要:
An additive manufacturing system includes a platen, a dispenser apparatus configured to deliver a layer of powder onto the platen or a previously dispensed layer on the platen, a voltage source coupled to the platen and configured to apply a voltage to the platen to create an electrostatic attraction of the powder to the platen sufficient to compact the powder, and an energy source configured to apply sufficient energy to the powder to fuse the powder.
摘要:
The present invention relates to a method for the hydrophobisation of DNA molecules comprising mixing an aqueous solution of the DNA molecule with a solution of a cationic lipid or a surfactant in an organic solvent under agitation for a period in the range of 30 to 60 minutes to obtain the hydrophobic DNA in organic phase.
摘要:
A process for extraction of nanoparticles into aqueous phase by complexation with water soluble surfactants such as cetyltrimethyl ammonium bromide (CTAB), sodium dodecyl sulfate (SDS) etc., wherein a bi-phasic mixture is prepared in which, hydrophobized nanoparticles are in organic medium, and surfactant molecules are in aqueous phase. An emulsion is formed on vigorous shaking of the bi-phasic mixture, and after phase separation metal nanoparticles transfer to aqueous medium.