Analyzer systems, MEMS

N Mechanism. This is the mechanism currently in use. It utilizes two solenoids for the actuation of two selectors. The selectors can be manually actuated independently for maximum flexibility. However, in typical operation of the system, an event-end or method-end pulse is sent to the contact closures from the control unit, the pulse actuates both solenoids concurrently, and both selectors are automatically actuated at the same time. When the selectors are actuated, a pair of extraction vessels is selected for the next extraction. Both of these extraction vessels are subjected to the same extraction conditions. Identical or different samples can be analyzed as mem-... 

Both MEMS gas analyzer systems described above have recently demonstrated preconcentration gains of over 100 after a sampling time of < 4 s, and separation of eight analytes in less than 4 s. We will now describe some details of the measurements obtained with the PHASED MG A system. 

AFM is an ideal tool for characterization of adhesion on the nanometer scale that is vital to the suction problems in Micro-Electro-Mechanical Systems (MEMS) devices. One of the key parameters in these measurements is the true contact area between the probe and the substtate. If one deals with a flat substrate and smooth spherical probe, then an appropriate model from contact mechanics can be applied to analyze the pull-off force data. Based on this method, the so-called colloidal probe technique was developed by using a micrometer-sized spherical particle glued to the end of an AFM cantilever as the force sensor. However, both the probe and the substrate usually demonsttate irregular shape and ill-defined roughness, which reduces the contact area and results in lower adhesion forces than what is expected from ideal geometries. Recently, systematic studies have been... 

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