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Home > Press > Multidisciplinary team of researchers develop world’s lightest material: UCI mechanical and aerospace engineer plays key role

Dan Little, HRL Laboratories LLC
New metal - which is 99.9 percent air - is so light that it can sit atop dandelion fluff without damaging it.
Dan Little, HRL Laboratories LLC

New metal - which is 99.9 percent air - is so light that it can sit atop dandelion fluff without damaging it.

Abstract:
A team of researchers from UC Irvine, HRL Laboratories and the California Institute of Technology have developed the world's lightest material - with a density of 0.9 mg/cc - about one hundred times lighter than Styrofoam™. Their findings appear in the Nov. 18 issue of Science.

Multidisciplinary team of researchers develop world’s lightest material: UCI mechanical and aerospace engineer plays key role

Irvine, CA | Posted on November 18th, 2011

The new material redefines the limits of lightweight materials because of its unique "micro-lattice" cellular architecture. The researchers were able to make a material that consists of 99.99 percent air by designing the 0.01 percent solid at the nanometer, micron and millimeter scales. "The trick is to fabricate a lattice of interconnected hollow tubes with a wall thickness 1,000 times thinner than a human hair," said lead author Dr. Tobias Schaedler of HRL.

The material's architecture allows unprecedented mechanical behavior for a metal, including complete recovery from compression exceeding 50 percent strain and extraordinarily high energy absorption.

"Materials actually get stronger as the dimensions are reduced to the nanoscale," explained UCI mechanical and aerospace engineer Lorenzo Valdevit, UCI's principal investigator on the project. "Combine this with the possibility of tailoring the architecture of the micro-lattice and you have a unique cellular material."

Developed for the Defense Advanced Research Projects Agency, the novel material could be used for battery electrodes and acoustic, vibration or shock energy absorption.

William Carter, manager of the architected materials group at HRL, compared the new material to larger, more familiar edifices: "Modern buildings, exemplified by the Eiffel Tower or the Golden Gate Bridge, are incredibly light and weight-efficient by virtue of their architecture. We are revolutionizing lightweight materials by bringing this concept to the nano and micro scales."

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About University of California, Irvine
Founded in 1965, UCI is a top-ranked university dedicated to research, scholarship and community service. Led by Chancellor Michael Drake since 2005, UCI is among the most dynamic campuses in the University of California system, with nearly 28,000 undergraduate and graduate students, 1,100 faculty and 9,000 staff. Orange County’s largest employer, UCI contributes an annual economic impact of $4.2 billion.

For more information, please click here

Contacts:
Janet Wilson
University Communications
949-824-3969

Copyright © University of California, Irvine

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