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Grad Student Makes Ultra-Sensitive Measurement of Deformation

07-13-17

Xiaoyue Ni, a materials science graduate student working with Professor Julia Greer, has shown that metals undergo permanent deformation even prior to yielding—the threshold at which a material under strain becomes permanently deformed. "What Xiaoyue's data are showing is that from the first moment you start deforming it, the dislocations start being active," Greer says. Now that we know how to do this, we can probe a variety of different classes of materials. [Caltech story]

Tags: APhMS research highlights Julia Greer Xiaoyue Ni

Julia-greer
Building Better Batteries

12-19-16

Julia R. Greer, Professor of Materials Science and Mechanics, and colleagues have measured for the first time the strength of lithium metal at the nano- and microscale, a discovery with important implications for suppressing dendrite formation and improving lithium-ion batteries.  [Caltech story]

Tags: Julia Greer APhMS MCE MedE research highlights

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Professor Greer Named National Security Science and Engineering Faculty Fellow

03-25-16

Julia R. Greer, Professor of Materials Science and Mechanics, has been chosen as a 2016 class of National Security Science and Engineering Faculty Fellow. The program awards grants to outstanding scientists and engineers at U.S. universities to conduct long-term, unclassified, basic research of strategic importance to the Defense Department. Professor Greer will conduct research in the area of Nano-architected Meta-materials. [U.S. Department of Defense Press Release]

Tags: Julia Greer APhMS MCE MedE honors

Julia-greer
Tiny Diatoms Boast Enormous Strength

02-08-16

Researchers in the lab of Julia R. Greer, Professor of Materials Science and Mechanics, have recently found that diatom shells have the highest specific strength—the strength at which a structure breaks with respect to its density—of any known biological material, including bone, antlers, and teeth. [Caltech story]

Tags: Julia Greer APhMS MCE MedE research highlights

Julia-greer
Atomic Fractals in Metallic Glasses

09-18-15

Julia R. Greer, Professor of Materials Science and Mechanics, and colleagues including graduate student David Chen have shown that metallic glasses has an atomic-level structure although it differs from the periodic lattices that characterize crystalline metals. "Our group has solved this paradox by showing that atoms are only arranged fractally up to a certain scale," Greer says. "Larger than that scale, clusters of atoms are packed randomly and tightly, making a fully dense material, just like a regular metal. So we can have something that is both fractal and fully dense." [Caltech story]

Tags: Julia Greer David Chen APhMS MCE MedE research highlights

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Women Making History

03-13-15

In celebration of Women’s History Month, influential women leaders from the Jet Propulsion Laboratory (JPL) and Caltech gathered at the JPL von Karman auditorium. Present at the event, entitled Women Making History, were the 2015 honorees for Women@JPL as well as Caltech faculty and staff. It was an opportunity for women at different stages of their career to meet and network. EAS faculty were represented by Professors Bordoni, Greer, and Hunt.  The JPL Advisory Council for Women was the lead organizer of the event.

Tags: Simona Bordoni Julia Greer Melany Hunt ESE MCE APhMS MedE JPL honors

Julia-greer
Tiny Lattices with Enormous Potential

02-18-15

Professor Julia Greer’s work on nanolattices is part of the 2015 MIT Technology Review’s 10 Breakthrough Technologies List. The list identifies the ten milestones from the past year that solve difficult problems or create powerful new ways of using technology. Professor Greer was selected for her work on nanomaterials and specifically “materials whose structures can be precisely tailored so they are strong yet flexible and extremely light.” [Learn more]

Tags: Julia Greer APhMS MCE honors

Julia-greer
Professor Greer Receives Robert W. Cahn Best Paper Prize

12-11-14

Julia R. Greer, Professor of Materials Science and Mechanics, and graduate student Lucas R. Meza’s paper entitled “Mechanical characterization of hollow ceramic nanolattices” is the winner of the 2014 Journal of Materials Science Robert W. Cahn Best Paper Prize. The prize recognizes a truly exceptional original research paper published in the journal in a particular calendar year. The winning paper is selected from the twelve finalists by a panel of distinguished materials scientists

Tags: Julia Greer Lucas Meza APhMS MCE MedE honors

Julia-greer
Professor Greer Awarded the Kavli Early Career Lecture in Nanoscience

09-23-14

Julia R. Greer, Professor of Materials Science and Mechanics, has been awarded the Kavli Early Career Lecture in Nanoscience. This honor recognizes significant novel contributions to materials science by a young researcher in the early stages of her career. Professor Greer’s nomination emphasized her creative, ingenious, and elegant work in nanoscience.

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Julia-research
Ceramics Don't Have To Be Brittle

09-11-14

Julia R. Greer, Professor of Materials Science and Mechanics, and her colleagues are on the path to developing materials that possess unheard-of combinations of properties. "Ceramics have always been thought to be heavy and brittle," says Professor Greer. "We're showing that in fact, they don't have to be either. This very clearly demonstrates that if you use the concept of the nanoscale to create structures and then use those nanostructures like LEGO to construct larger materials, you can obtain nearly any set of properties you want. You can create materials by design." [Caltech Release]

Tags: Julia Greer APhMS MCE research highlights

Department of Applied Physics and Materials Science