Nozzle

About: Nozzle is a research topic. Over the lifetime, 158675 publications have been published within this topic receiving 893026 citations. The topic is also known as: spout.

A fully integrated monolithic microchip electrospray device for mass spectrometry

Abstract: A novel microfabricated nozzle has been developed for the electrospray of liquids from microfluidic devices for analysis by mass spectrometry. The electrospray device was fabricated from a monolithic silicon substrate using deep reactive ion etching and other standard semiconductor techniques to etch nozzles from the planar surface of a silicon wafer. A channel extends through the wafer from the tip of the nozzle to a reservoir etched into the opposite planar surface of the wafer. Nozzle diameters as small as 15 μm have been fabricated using this method. The microfabricated electrospray device provides a reproducible, controllable, and robust means of producing nanoelectrospray of a liquid sample. The electrospray device was interfaced to an atmospheric pressure ionization time-of-flight mass spectrometer using continuous infusion of test compounds at low nanoliter-per-minute flow rates. Nozzle-to-nozzle signal intensity reproducibility using 10 nozzles was demonstrated to be 12% with single-nozzle signal...

Apparatus and method for polymer synthesis using arrays

Abstract: A polymer synthesis method and apparatus (20) is disclosed for building a polymer chain including a head assembly (21) having nozzles (22) with each nozzle coupled to a reservoir (23) of liquid reagent (24), and a base assembly (25) having reaction wells (26). A gas inlet (70) into the common chamber (31), upstream from the nozzles (22), and a gas outlet (71) out of the common chamber (31), downstream from the nozzles (22), sweeps the common chamber (31) of toxic fumes emitted by the reagents. A pressure regulating device (82) is provided for controlling a pressure differential, between pressure exerted on the reaction well (26) and pressure exerted on an exit (80) of the orifice (74), such that upon the pressure differential exceeding a predetermined amount, the reagent solution (76) is expelled.

The nozzle-fluid concentration field of the round, turbulent, free jet

Abstract: The light-scatter technique has been used to study the nozzle-fluid concentration field in an isothermal, turbulent, axisymmetric air/air free jet with the nozzle air marked by an oil smoke. The data on the mean concentration field appear to be the most accurate yet obtained, due to the peculiar advantages of the technique. The turbulent concentration fluctuations have been characterized as to intensity, spectral distribution, and two-point correlation. The intermittency factor has been measured and the properties of the turbulent fluid computed. Comparison with the results of other investigators who used heat to mark the nozzle fluid indicates a close similarity between the concentration and temperature fields.

Gas injection slit nozzle for a plasma process reactor

Abstract: The invention is embodied in a gas injection apparatus for injecting gases into a plasma reactor vacuum chamber having a chamber housing, a pedestal holding a workpiece to be processed, means for applying RF energy into the chamber, the gas injection apparatus having a gas supply containing an etchant species in a gas, an opening in the chamber housing, a gas feed line from the supply to the opening in the chamber housing, and gas distribution apparatus near the opening in the chamber housing, the gas feed apparatus having at least one slit nozzle facing the interior of the chamber. In a preferred embodiment, the gas distribution apparatus includes a disk member surrounded by at least one annular member with a gap therebetween comprising the slit nozzle, the disk member and annular member blocking gas flow through the opening in the chamber housing. Preferably, each of the members of the gas distribution apparatus comprises a material at least nearly impervious to attack from the etchant species. In one example, each of the members of the gas distribution apparatus comprises one of ceramic, quartz, sapphire, polyimide or anodized aluminum and the gas feed line comprises stainless steel. Preferably, each of the members has its surface polished prior to assembly of the gas distribution apparatus.

Inkjet recording head

Abstract: PURPOSE:To realize a compact structure of an inkjet recording head having highly-dense nozzles, by arranging one surface of an electromechanical transducer opposed to a flow passage of a recording liquid, and at the same time supported in a cantilever structure CONSTITUTION:An electromechanical transducer 2 is comprised of an electric distortion vibrator 2a and an elastic plate 2b coupled to each other The element 2 is so arranged that the side of the elastic plate 2b is opposed to a flow passage 4 of a recording liquid communicating with a nozzle 3 One end of the elastic plate 2b is fixedly supported in a cantilever structure at a fixing part 7 of the element at the opposite side to the nozzle 3 When the fixing part 7 at the opposite side of the nozzle 3 is displaced at right angles to the flow passage 4, the element 2 is displaced in a manner that the recording liquid 5 is pressed out towards the nozzle 3 Therefore, it is more effective to project liquid drops from the nozzle 3 Moreover, since the element 2 is supported in a cantilever structure, an end position of the element can be greatly displaced, whereby a large change in volume can be obtained