Making Integrated 3D Microsystems With a Femtosecond Laser
Femtosecond lasers can create truly three-dimensional microscale features in glass, by writing 3D patterns that have a modified etching rate and index of refraction. This approach enables the creation of monolithic microsystems with combined 3D optical, mechanical,and fluidic functions. In this presentation, this unique fabrication tool will be explained in more detail, followed by a discussion of two case studies of its application. In the first,topologically-complex microstructures are created by using femtosecond laser-machined glass as a mold for an elastomer. In the second, a combination of optical and microfludic features on a chip enable the automatic identification of algae by species.
Mechanical Properties of Metals at the Sub-Micrometer Scale
Nanomechanical devices are certain to play an important role in future technologies such as sensors and actuators based on MEMS technologies. These developments are part of a decades-long trend to build useful engineering devices on a smaller and smaller scale. The creation of structures and devices always calls for an understanding of the mechanical properties of materials at these small length scales. This talk will present some of the effects that arise when metallic nanopillars and nanolattices are mechanically deformed. Their unique nanomechanical properties will be discussed within the framework of size effects.
Mechanical Design and Fabrication Techniques for Bio-Electronic Systems
Biological systems are soft, elastic and curved; silicon wafers are rigid, brittle and flat. Semiconductor technologies that bridge this gap in mechanics and form will create new opportunities in bio-inspired and bio-integrated systems. This talk describes mechanical design methods for developing unconventional forms of silicon electronics that offer the performance of traditional wafer-based devices but that can be bent, twisted, and stretched. The underlying mechanics in design, micro-fabrication and transfer printing approaches is discussed in details. These ideas are demonstrated with bio-inspired system and bio-integrated, ‘tissue-like’ electronics that has unique capabilities in cardiac electrophysiology, human-machine interfaces, and continuous health monitors.
Propulsion Engineering is a specialized field which is an important part of the Aerospace and Mechanical Engineering fields. Propulsion brings together the fields of chemistry, fluid mechanics, thermodynamics, static dynamics, stress causes, and heat transfers. Marine propulsion is the mechanism or system used to generate thrust to move a ship or boat across water. Nuclear propulsion includes a wide variety of propulsion methods that fulfill the promise of the Atomic Age by using some form of nuclear reaction as their primary power source