More Like this

1. Mechanical properties of particles

   https://doi.org/10.22323/1.346.0066  

   Polyakov, Maxim; Schweitzer, Peter (August 2019, 23rd International Symposium on Spin Physics (SPIN 2018))

   Selected topics related to the physics of the energy-momentum tensor (EMT) form factors are discussed. The topics are: 1) Fundamental mechanical properties of particles and gravity 2) Mechanical properties of non-spherical particles 3) Gravitational form factors of Goldstone bosons 4) Nucleon's seismology? 

   more » « less
2. Mechanical Photoluminescence Excitation Spectra of a Strongly Driven Spin-Mechanical System

   https://doi.org/10.1103/PhysRevApplied.19.064068  

   Li, Xinzhu; Wang, Hailin (June 2023, Physical Review Applied)
3. Mechanical and Non‐Mechanical Functions of Filamentous and Non‐Filamentous Vimentin

   https://doi.org/10.1002/bies.202000078  

   Patteson, Alison E.; Vahabikashi, Amir; Goldman, Robert D.; Janmey, Paul A. (September 2020, BioEssays)

   Abstract Intermediate filaments (IFs) formed by vimentin are less understood than their cytoskeletal partners, microtubules and F‐actin, but the unique physical properties of IFs, especially their resistance to large deformations, initially suggest a mechanical function. Indeed, vimentin IFs help regulate cell mechanics and contractility, and in crowded 3D environments they protect the nucleus during cell migration. Recently, a multitude of studies, often using genetic or proteomic screenings show that vimentin has many non‐mechanical functions within and outside of cells. These include signaling roles in wound healing, lipogenesis, sterol processing, and various functions related to extracellular and cell surface vimentin. Extracellular vimentin is implicated in marking circulating tumor cells, promoting neural repair, and mediating the invasion of host cells by viruses, including SARS‐CoV, or bacteria such asListeriaandStreptococcus. These findings underscore the fundamental role of vimentin in not only cell mechanics but also a range of physiological functions. Also see the video abstract herehttps://youtu.be/YPfoddqvz-g. 

   more » « less
4. Mechanical Wannier-Stark ladder of diamond spin-mechanical Lamb wave resonators

   https://doi.org/10.1103/PhysRevA.110.062603  

   Andrango, Philip; Wang, Hailin (December 2024, Physical Review A)
5. Effect of processing conditions on the mechanical properties of bio-inspired mechanical gradient nanocmposites

   Zhang, Y.; Edelbrook, A.N.; Rowan, S. J. (March 2019, European Polymer Journal)

   Photo-induced thiol-ene crosslinking of allyl-functionalized cellulose nanocrystal (CNC)/polymer nanocomposites allows access to films that mimic the water-enhanced mechanical gradient characteristics of the squid beak. These films are prepared by mixing the functionalized CNCs and polymer in a solvent before solution casting and drying. The photocrosslinking agents are then imbibed into the film before UV exposure. Reported herein are studies aimed at better understanding the effect of the film preparation procedure, film thickness and the conditions under which the UV treatment is carried out. It was found that when the film is heated at a temperature higher than its glass transition temperature (Tg) during the UV irradiation step there is a greater enhancement in the mechanical properties of the films, presumably on account of more efficient crosslinking between the CNC fillers. Moreover, composite films that were compression molded (at 90°C) before the imbibing step displayed lower mechanical properties compared to the as-cast films, which is attributed to phase separation of the CNC fillers and polymer matrix during this additional processing step. Finally, the film thickness was also found to be a critical factor that affects the degree of crosslinking. For example, thinner films (50 µm) displayed a higher wet modulus ca. 130 MPa compared to ca. 80 MPa for the thicker films (150 µm). Understanding the processing conditions allows access to a larger range of mechanical properties which is important for the design of new bio-inspired mechanical gradient nanocomposites. 

   more » « less