Microstructures Self-Assemble into New Materials
03-03-20
A new process developed at Caltech makes it possible for the first time to manufacture large quantities of materials whose structure is designed at a nanometer scale—the size of DNA's double helix. Pioneered by Professor Julia R. Greer, "nanoarchitected materials" exhibit unusual, often surprising properties—for example, exceptionally lightweight ceramics that spring back to their original shape, like a sponge, after being compressed. Now, a team of engineers at Caltech and ETH Zurich have developed a material that is designed at the nanoscale but assembles itself—with no need for the precision laser assembly. "We couldn't 3-D print this much nanoarchitected material even in a month; instead we're able to grow it in a matter of hours," says Carlos M. Portela, Postdoctoral Scholar. "It is exciting to see our computationally designed optimal nanoscale architectures being realized experimentally in the lab," says Dennis M. Kochmann, Visiting Associate. [Caltech story]
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Julia Greer
Dennis Kochmann
Carlos Portela
Professor Rosakis Elected Laureate of the Aurel Stodola Lecture
02-05-20
Ares J. Rosakis, Theodore von Karman Professor of Aeronautics and Mechanical Engineering has been elected as the Laureate of the Aurel Stodola Lecture and presented with the Aurel Stodola Medal. The Aurel Stodola Lecture Series commemorates the contributions of Professor Aurel Stodola in the early 20th century whose work on applied thermodynamics has guided many engineers and engineering developments worldwide. "Ares Rosakis possesses this unique ability to develop new experimental methods to make extremely fast mechanical processes (such as those occurring during earthquakes) tangible and observable in the laboratory," says Bradley Nelson, Professor of Robotics and Intelligent Systems and Head of D-MAVT. [Past Awardees]
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Ares Rosakis
Bionic Jellyfish Swim Faster and More Efficiently
01-30-20
John Dabiri, Centennial Professor of Aeronautics and Mechanical Engineering, has developed a tiny prosthetic that enables jellyfish to swim faster and more efficiently than they normally do, without stressing the animals. Dabiri is envisioning a future in which jellyfish equipped with sensors could be directed to explore and record information about the ocean. "Only five to 10 percent of the volume of the ocean has been explored, so we want to take advantage of the fact that jellyfish are everywhere already to make a leap from ship-based measurements, which are limited in number due to their high cost," Dabiri says. "If we can find a way to direct these jellyfish and also equip them with sensors to track things like ocean temperature, salinity, oxygen levels, and so on, we could create a truly global ocean network where each of the jellyfish robots costs a few dollars to instrument and feeds themselves energy from prey already in the ocean." [Caltech story]
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John Dabiri
Bees "Surf" Atop Water
11-20-19
Chris Roh, Research Engineer, working with Professor Morteza Gharib, discovered a unique way that bees navigate the interface between water and air. When a bee lands on water, the water sticks to its wings, robbing it of the ability to fly. However, that stickiness allows the bee to drag water, creating waves that propel it forward."I was very excited to see this behavior and so I brought the honeybee back to the lab to take a look at it more closely," Roh says. [Caltech release]
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Morteza Gharib
Chris Roh
