The Gu Group works at the intersection of solid mechanics, materials science and nano-chemistry. We study the mechanical behavior of nanoscale metals and hybrid materials, the effect of strain and crystalline defects on optical nanomaterials, and the self-assembly and 3D printing of nano-architected composites.
Published in MRS Communications in June 2019!
The strength of single-crystalline nanoscale metals is controlled by dislocation nucleation from free surfaces. Surface properties such as crystallographic orientation, surface stress, and surface diffusion have been proposed as key parameters that control dislocation surface nucleation, but have not been confirmed experimentally. To investigate the influence of surface parameters, in situ scanning electron microscope mechanical testing is used to compress defect-free Ag and Cu nanocubes that are passivated with organic surfactants in order to tune their surface properties. Comparison between passivated nanocubes indicates that yield strength may depend on surfactant binding energy, but is also dependent on intrinsic material properties.
We are currently looking for highly motivated students and postdocs who enjoy working in a collaborative setting to join our team. We welcome researchers with backgrounds in Mechanical Engineering, Materials Science, Chemical Engineering, Chemistry, Physics and related fields.
Students who have already been accepted to Stanford University can contact us with a CV , and a request to set up a meeting to discuss research interests. Postdocs are encouraged to contact us with a CV, and a statement of research and career goals.