Abstract

Dear Colleagues,

Here you can find our recent paper about hydrogel sensor for chemical detection.

Hydrogel Interferometry for Ultrasensitive and Highly Selective Chemical Detection

Authors: Mo Sun, Ruobing Bai, Xingyun Yang, Jiaqi Song, Meng Qin, Zhigang Suo, Ximin He

Abstract

 A demonstration through an example is given of how the Volterra dislocation formulation in linear elasticity can be viewed as a (formal) limit of a problem in plasticity theory. Interestingly, from this point of view the Volterra dislocation formulation with discontinuous displacement, and non-square-integrable energy appears as a large-length scale limit of a smoother microscopic problem. This is in contrast to other formulations using SBV functions as well as the theory of Structured deformations where the microscopic problem is viewed as discontinuous and the smoother plasticity formulation appears as a homogenized large length-scale limit.

The demand for higher specific capacity and rate capability has led to the adoption of nanostructured electrodes for lithium-ion batteries. At these length scales, surface effects gain an appreciable impact not only on the electrochemical and mechanical behavior of the electrode material, but also on defect thermodynamics. The focus of this study is the distribution of surface-induced bulk stresses in a LiCoO2 nanoparticle and their impact on the migration of Li vacancies. LiCoO2 is a prototypical cathode material, where the diffusion of Li is mediated by the vacancy mechanism.

The College of Engineering and Science at Louisiana Tech University is seeking self-motivated candidates for a Graduate Research Assistant (Ph.D. student) position, with the earliest starting date in Winter 2018.

Successful candidates will join the research group of Dr. Xiang (Shawn) Chen, who is in the research area of atomistic and multiscale simulation/modeling. A list of related publications can be found below: https://scholar.google.com/citations?user=qdz0cy4AAAAJ&hl=en

We would like to invite contributions to a session on current and future needs in sub-microscale vibration analysis at the 2019 Engineering Mechanics Institute Conference at the California Institute of Technology.

Please see call for presentations attached.

Thank you.

Arzhang Alimoradi, Ph.D., P.E.

A 1 year post Doctoral position is avalaible in France, on computational fractur mechanics. This is a join project between Univ. Paris 13 (LSPM lab), and Paris 7 (ITODYS lab).

The present postdoc subject is focused on the modeling cracking and buckling in thin films and nanostructures on stretchable substrate.

https://doi.org/10.1007/978-3-319-50257-1_83-1 The second volume of the Handbook of Materials Modeling is now online: We reviewed the development of new empirical molecular dynamics forcefields, novel methods of generating aerogels’ percolated backbones, and compelling algorithms for characterizing their structural, mechanical, and thermal properties that have resulted in unprecedented insights into silica aerogels.