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Self-constructing materials, which can spontaneously change their shapes from ordinary two-dimensional (2D) planes into complex three-dimensional (3D) structures, are always an attractive subject of intelligent materials. Herein, we report a simple yet effective strategy for the fabrication of programmable, thermally responsive and self-constructing hydrogels which can undergo various types of transformation...
Eight opto-thermocapillary flow-addressed bubble (OFB) microrobots were independently actuated in phosphate-buffered saline (PBS) in an open reservoir. The bubble microrobots were nucleated using opto-thermal heating of the fluid medium and independently controlled by a computer-generated holographic (CGH) control system. Independent actuation of multiple microrobots in PBS solution demonstrates the...
We present the first MEMS Solid State Gas Generator (SSGG) for use as a deorbit technology, in conjunction with inflation balloons, for Small-Satellites (<180kg mass). The total system, named the Solid State Inflation Balloon (SSIB), is being designed as a simple, reliable, scalable, low-cost, non-propulsive deorbit system. Small-Sats in Low Earth Orbit (LEO) are required, through multi-national...
We report the fabrication and characterization of a microfluidic droplet microreactor with potential use for single catalyst particle diagnostics. The aim is to capture Fluid Catalytic Cracking (FCC) particles in droplets and perform a probe reaction that results in a fluorescent output signal. The intensity of such a signal can be used as a measure of the catalytic activity of the particle. The microreactor...
Mechanical memory devices are needed for harsh environments where electronic components fail to operate. An integrated electro-thermal technique for local magnetic annealing, which enables post-production programming capabilities for mechanical micro-resonators is presented. It is verified by a prototype with ferromagnetic resonating elements suspended on top of a polysilicon resistive heater. The...
This paper reports a simple and effective method for generating a stable temperature gradient on a microfluidic plant chip. A thermo-electric cooling (TEC) plate is horizontally placed below an inclined microfluidic plant chip. The space between the TEC and the plant chip is filled with polydimethylsiloxane (PDMS). Due to different lengths of thermal pathways from the TEC to the plant chip, a stable...
In this study, we propose two devices that provide an easier and faster method to execute in-vitro fertilization (IVF) technique. The devices consist of a high quality sperm sorter and an oocytes zona-removal and incubation device to aid promoting the success rate and the efficiency of IVF technique. Comparing with the traditional IVF process, the high quality sperm sorter can gently sort out large...
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