Northwestern University

Last summer, Northwestern University researchers introduced the first-ever transient pacemaker — a fully implantable, wireless device that harmlessly dissolves in the body after it's no longer needed. Now, they unveil a new, smart version that is integrated into a coordinated network of soft, flexible, wireless, wearable sensors and control units placed around the upper body.

Engineers have developed the smallest-ever remote-controlled walking robot — and it comes in the form of a tiny crab. Just a half-millimeter wide, the tiny crabs can bend, twist, crawl, walk, turn and even jump. The researchers also developed millimeter-sized robots resembling inchworms, crickets and beetles. Although the research is exploratory at this point, the researchers believe their technology might bring the field closer to realizing micro-sized robots that can perform practical tasks inside tightly confined spaces.

Engineers have developed a new smart sensor platform for face masks that they are calling a "Fitbit for the face." Dubbed "FaceBit," the lightweight, quarter-sized sensor uses a tiny magnet to attach to any N95, cloth or surgical face mask.

A team of scientists has demonstrated a high-performing thermoelectric material in a practical form that can be used in device development. The material — purified tin selenide in polycrystalline form — outperforms the single-crystal form in converting heat to electricity, making it the most efficient thermoelectric system on record.