Tailoring the hydraulic impedance of out-of-plane micromachined electrospray sources with integrated electrodes
نویسندگان
چکیده
Hydraulic impedance is a critical parameter for the operation of electrospray emitters, and for preventing flooding when spraying from arrays of emitters. Controlling flow rate by tuning the flow impedance allows accessing different operating modes, such as droplet, ionic, or pulsating. We report on a method to tailor the hydraulic impedance of micromachined capillary out-of-plane emitters with integrated extractor electrodes by filling them with silica microspheres. Spraying the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate EMI-BF4 , we demonstrate the ability to tune from droplet emission to pure ion emission depending on microbead diameter, obtaining stable emission from single emitters and from arrays of 19 emitters. © 2009 American Institute of Physics. DOI: 10.1063/1.3117191
منابع مشابه
Integrated out-of-plane nanoelectrospray thruster arrays for spacecraft propulsion
Nanoelectrosprays, well known for their use in sample injection for the mass spectrometry of large biomolecules, can also be used in other applications such as spacecraft propulsion. The thrust generated by a single electrospray emitter is well below 1 μN, which is several orders of magnitude below the required thrust for planned formation flying missions. This paper presents the process flow a...
متن کاملcarbon nanotubes for Electrospray nanofluidic Applications
Electrospray is the technique to soft-ionize liquids by applying a high electric potential to a liquid meniscus. The liquid meniscus is deformed into a cone [1], and charged species are emitted from its apex. The emission can be solvated ions, charged droplets, or a mix of the two. This low-divergence charged species source can be used in diverse applications such as mass spectrometry, propulsi...
متن کاملProgress Towards a Miniaturized Electrospray Thruster for Flexible Propulsion of Small Spacecraft
Miniaturized electrical thrusters based on electrospray (or colloid) emitters could revolutionize the spacecraft industry by providing e cient propulsion capabilities to micro and nano satellites (1-100 kg). We report on our recent advances in the development of this technology within the MicroThrust (www.microthrust.eu) European consortium. We present the design and operation of the currently ...
متن کاملLiquid Encapsulation in Parylene Microstructures Using Integrated Annular-Plate Stiction Valves
We report the design, fabrication and characterization of micromachined Parylene structures for self-sealing liquid encapsulation applications. Automatic sealing is enabled through the use of an integrated annular-plate stiction valve which greatly reduces device footprint over in-plane configurations. We achieve automatic wafer-level liquid entrapment without using adhesives or processing at e...
متن کاملComparison of Binary and Ternary Compositions of Ni-Co-Cu Oxides/VACNTs Electrodes for Energy Storage Devices with Excellent Capacitive Behaviour
Electrochemical performance of binary and ternary oxides composed of Ni, Co and Cu produced over a 3-dimensional substrate of vertically aligned carbon nano-tubes (VACNT) as electrodes for aqueous energy sources, is reported and compared in this paper. VACNTs were fabricated inside a DC-plasma enhanced chemical vapor deposition chamber and composite materials fabricated by thermal decomp...
متن کامل