dynamics – TechConnect Briefs

Dynamics of Water in Nafion Fuel Cell Membranes: the Effects of

Moilanen D.E., Piletic I.R., Fayer M.D., Stanford University, US

The complex environment experienced by water molecules in the hydrophilic channels of Nafion membranes is studied by ultrafast infrared pump-probe spectroscopy. A wavelength dependent study of the vibrational lifetime of the O-D stretch of dilute [...]

Dynamics of Water in Nafion Fuel Cell Membranes: the Effects of

Moilanen D.E., Piletic I.R., Fayer M.D., Stanford University, US

The complex environment experienced by water molecules in the hydrophilic channels of Nafion membranes is studied by ultrafast infrared pump-probe spectroscopy. A wavelength dependent study of the vibrational lifetime of the O-D stretch of dilute [...]

Understanding and utilizing molecular constraints in nanoscale material designs

Sills S., Overney R.M., Micron Technology, Inc., US

Challenges regarding nanoscale material designs often arise from the collision of two sets of critical length-scales; namely, device dimensions approach the length scale of molecular-level processes. On one hand, these finite size constraints cannot be [...]

Modeling and Dynamics of Coupled Dome-shaped Micromechanical Oscillators

Sahai T., Zehnder A.T., Cornell University, US

In this work we analyze a feasible approach for constructing coupled micromechanical oscillators that synchronize. For this purpose we use dome shaped micro-oscillators that have previously been used to build radios. These oscillators are fabricated [...]

Investigation of the Dynamics of Microdevices – As a Design Tool

Seter D.J., Degani O., Kaldor S., Scher E., Nemirovsky Y., RAFAEL Microsystems Group, IL

When designing microaccelerometers, microgyroscopes and other microdevices, there is a strong need for dynamic understanding in system level. Thus, dynamic simulation is a part of many CAD tools for MEMS [1]. In this work, a [...]

Oscillating Diaphragms

McEntee J., Bowman L., McEntee Engineering, US

The manufacture of miniature Stirling cycle cryocoolers, using standard micro-machining techniques and materials has been pursued by the authors [1]. A MEMS based cryocooler would allow integration of a cryogenic cooling system directly into a [...]

Model Based Identification as a New Tool to Extract Physical Parameters of Microactuators from Measurements with Error Bounds

Rembe C., Hofer E.P., Tibken B., University of Ulm, DE

Model based evaluation of high speed cinematographic image sequences is demonstrated for a microrelay which was manufactured using the LIGA technology. The measurements of the microrelay have been performed with an experimental setup based on [...]