For example, electrostatic forces from surface charges could dominate as well as intermolecular forces such as van der Waals forces. However, when device sizes are micro- or nano-sized, non-traditional forces may be important that would never be relevant at macroscale. Bjorn Sjodin, company VP of Product Management, describes some general nano-level criteria that dictate when to use either a “continuum” or molecular dynamics analysis method.įor structural mechanics at the nanoscale, as long as the device is not too small, you can use standard structural analysis methods for elasticity, as built into COMSOL Structural Mechanics Module and MEMS Module, just as you would do for a macroscopic structure. Further, it entails the exploitation of novel phenomena, including the properties of matter, energy and information at the molecular, atomic and sub-atomic levels.”ĬOMSOL Multiphysics software handles a range of physics types and applications through its targeted add-on modules. Commercial Simulation Packages for Nanotechnologyįor perspective, SmallTech Consulting, a California firm that provides expert consulting services in several micro- and nano-related technical and business disciplines, offers this general description: “Nanotechnology is the study, design, creation, synthesis, manipulation and application of functional materials, devices and systems through control of matter and energy at the nanometer scale. DE takes a look at what you can use right now, with a focus on electrical and mechanical applications. Image courtesy of COMSOL.įortunately, compared to just five years ago (see “ Twinkies, Tennis Rackets and Nanotechnology”), simulation tools that take on this task continue to evolve on both commercial and university/consortium fronts. To calculate drift for different scenarios, the user can control the geometric design of the sensor, solvent properties, and material. This COMSOL Multiphysics application simulates the drift of measured strain in a MEMS pressure sensor due to hygroscopic swelling.
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