Cephalopod-inspired Design of Electro-mechano-chemically Responsive Elastomers for On-demand Fluorescent Patterning

Qiming Wang, Gregory R. Gossweiler, Stephen L. Craig*, Xuanhe Zhao*

Recent experiments reveal that a scanning tunneling microscopy (STM) probe tip can generate a highly localized strain field in a graphene drumhead, which in turn leads to pseudomagnetic fields in the graphene that can spatially confine graphene charge carriers in a way similar to a lithographically defined quantum dot (QD). While these experimental findings are intriguing, their further implementation in nanoelectronic devices hinges upon the knowledge of key underpinning parameters, which still remain elusive.

Silicon is a promising anode material for lithium-ion batteries due to its enormous theoretical energy density. Fracture during electrochemical cycling has limited the practical viability of silicon electrodes, but recent studies indicate that fracture can be prevented by taking advantage of lithiation-induced plasticity. In this paper, we provide experimental insight into the nature of plasticity in amorphous Li_xSi thin films. To do so, we vary the rate of lithiation of amorphous silicon thin films and simultaneously measure stresses.

Description:  Postdoc position in computational biomechanics in the Mechanical Engineering Department at Johns Hopkins University

We are seeking to fill two postdoctoral scholar positions at Oregon State University. The ideal candidates will have expertise in one or more of the following: computational materials science, granular mechanics, solid mechanics, and/or mechanical testing of materials. Positions will initially be for 1 year with an anticipated starting date of January 1st, 2015, with the possibility to continue for a second year depending on performance and continued funding.

The successful candidates will:

Dear imechanica members,

My name is Likun and I am posting this blog in searching for postdoctoral positions in Computational Solid Mechanics.

I obtained Ph.D. in Computational Mechanics at Carnegie Mellon University. My thesis work involves developing multiscale method for retrieving slow-time scale behavior from molecular dynamics.

I also have several years' research experience in multiscale analysis and phase-field modeling of hysteresitic behaviror in active materials.  

<p>Please join us at the Summer Biomechanics, Bioengineering and Biotransport Conference (SB3C2015), to be held at beautiful Snowbird Utah, July 17-20, 2015 (http://www.snowbird.com). The theme of the conference this year is <strong> Synergy of Modeling and Experiments in Biomechanics, Bioengineering and Biotransport </strong>.

A short overview of micromechanical models of hierarchical materials (hybrid composites, biomaterials, fractal materials, etc.) is given. Several examples of the modeling of strength and damage in hierarchical materials are summarized, among them, 3D FE model of hybrid composites with nanoengineered matrix, fiber bundle model of UD composites with hierarchically clustered fibers and 3D multilevel model of wood considered as a gradient, cellular material with layered composite cell walls.