research

Chiqun Zhang         Amit Acharya        Alan C Newell          Shankar C Venkataramani

 (in Physica, D)

Defects, a ubiquitous feature of ordered media, have certain universal features, independent of the underlying physical system, reflecting their topological, as opposed to energetic properties. We exploit this universality, in conjunction with smoothing defects by "spreading them out," to develop a modeling framework and associated numerical methods that are applicable to computing energy driven behaviors of defects across the amorphous-soft-crystalline materials spectrum. Motivated by ideas for dealing with elastic-plastic solids with line defects, our methods can handle order parameters that have a head-tail symmetry, i.e. director fields, in systems with a continuous translation symmetry, as in nematic liquid crystals, and in systems where the translation symmetry is broken, as in smectics and convection patterns. We illustrate our methods with explicit computations.

Preprint

Pressure sensors have attracted tremendous attention because of their potential applications in the fields of health monitoring, human–machine interfaces, artificial intelligence, and so on. Improving pressure‐sensing performances, especially the sensitivity and the detection limit, is of great importance to expand the related applications, however it is still an enormous challenge so far. Herein, highly sensitive piezoresistive pressure sensors are reported with novel light‐boosting sensing performances.

The Hector Fellow Academy offers you the opportunity to realize a self-developed research project under supervision Prof. Peter Gumbsch. He is one of the Hector Fellows, a community of outstanding professors from different research institutions across Germany working in STEM-subjects, medicine, and psychology.

The extraordinary mechanical properties of graphene were measured on very small or supported samples. In our new paper published in Nature Communications, by developing a protocol for sample transfer, shaping and straining, we report the outstanding elastic properties and stretchability of free-standing single-crystalline monolayer graphene under in situ tensile tests.

https://doi.org/10.1016/j.biomaterials.2020.119857 Our unified experimental and computational approach provided underlying insights needed to guide potential therapies for Alport syndrome (AS) that ameliorate the adverse effects from AS disease onset and progression. Patients with AS exhibit blood and elevated protein levels in their urine, inflamed kidneys, and many other abnormalities.

A Special Issue entitled "Nanofabrication, Atomic and Close-to-atomic Scale Manufacturing" for the journal Nanomanufacturing and Metrology is now open for submission:

The submission deadline is June 15, 2020. For more information, please refer to the attached flier or this webpage:

https://www.springer.com/journal/41871/updates/17701520

Burebi Yiming, Lei Wu, Mingqi Zhang, Zilong Han, Pei Zhao, Tiefeng Li, Zheng Jia*, Shaoxing Qu, Highly Stretchable Bilayer Lattice Structures that Elongate via in-Plane Deformation, Advanced Functional Materials, 2020, 1909473 (DOI: https://doi.org/10.1002/adfm.201909473)

https://doi.org/10.1016/j.ijplas.2020.102689

Abstract