Mechanical tunability of flexoelectricity in elastomers

2021 ◽  
Vol 119 (10) ◽  
pp. 102901
Author(s):  
Hui Ji ◽  
Shubao Shao ◽  
Kaiyuan Liu ◽  
Hongxing Shang ◽  
Yuanwei Zhu ◽  
...  
Keyword(s):  
Mechanical Tunability

Microfluidic serpentine antennas with designed mechanical tunability

Lab on a Chip ◽  
2014 ◽  
Vol 14 (21) ◽  
pp. 4205-4212 ◽  
Author(s):  
YongAn Huang ◽  
Yezhou Wang ◽  
Lin Xiao ◽  
Huimin Liu ◽  
Wentao Dong ◽  
...  
Keyword(s):  
Frequency Modulation ◽  
Mechanical Tunability

This paper describes the design and characterization of microfluidic serpentine antennas with reversible stretchability and designed mechanical frequency modulation (FM).

Structural symmetry breaking induced polarization sensitivity enhancement: Used for THz tri-band mechanical tunability

2019 ◽  
Vol 33 (05) ◽  
pp. 1950032
Author(s):  
Qi Rong ◽  
Fangrong Hu ◽  
Yuanyuan Li ◽  
Shan Yin ◽  
Mingzhu Jiang ◽  
...  
Keyword(s):  
Modulation Depth ◽  
Near Field ◽  
Sensitivity Enhancement ◽  
Electromagnetic Response ◽  
Integration Time ◽  
Polarization Sensitivity ◽  
Thz Wave ◽  
Field Coupling ◽  
Mechanical Tunability ◽  
Novel Design

A symmetry broken hexagram metamaterial (SBHM) is presented to enhance the polarization sensitivity, and thus realize mechanically controlling the transmissions of tri-band in terahertz (THz) region. This SBHM has different electromagnetic response for rotating clockwise and anticlockwise, respectively. When incident THz wave is polarized in the direction of [Formula: see text], the SBHM has three stopbands with central frequencies at 0.36 THz, 0.52 THz and 0.75 THz, respectively. When the SBHM rotates clockwise [Formula: see text], the transmission of 0.52 THz increases from 0.17 to 0.85, and its modulation depth reaches 68%. On the contrary, when it rotates anticlockwise [Formula: see text], the transmissions of the other two bands can be modulated simultaneously, and their modulation depth are 78% and 40%, respectively. The physical mechanism for the tunability is investigated using finite-integration time-domain (FITD) method. The results indicated that the tri-band tunability in the SBHM is due to the mode transfer and polarization sensitivity enhancement which is induced by near field coupling. This novel design proves a new way for modulation, selection and switching of the THz wave at multiband.

Donor-Induced Performance Tuning of Amorphous SrTiO3Memristive Nanodevices: Multistate Resistive Switching and Mechanical Tunability

2015 ◽  
Vol 25 (21) ◽  
pp. 3172-3182 ◽  
Author(s):  
Hussein Nili ◽  
Sumeet Walia ◽  
Ahmad Esmaielzadeh Kandjani ◽  
Rajesh Ramanathan ◽  
Philipp Gutruf ◽  
...  
Keyword(s):  
Resistive Switching ◽  
Performance Tuning ◽  
Mechanical Tunability

scholarly journals Extreme mechanical resilience of self-assembled nanolabyrinthine materials

2020 ◽  
Vol 117 (11) ◽  
pp. 5686-5693 ◽  
Author(s):  
Carlos M. Portela ◽  
A. Vidyasagar ◽  
Sebastian Krödel ◽  
Tamara Weissenbach ◽  
Daryl W. Yee ◽  
...  
Keyword(s):  
Self Assembly ◽  
Base Material ◽  
Ceramic Materials ◽  
Separation Processes ◽  
Atomic Lattice ◽  
Long Term Stability ◽  
Hierarchical Composites ◽  
Self Assembled ◽  
Manufacturing Techniques ◽  
Mechanical Tunability

Low-density materials with tailorable properties have attracted attention for decades, yet stiff materials that can resiliently tolerate extreme forces and deformation while being manufactured at large scales have remained a rare find. Designs inspired by nature, such as hierarchical composites and atomic lattice-mimicking architectures, have achieved optimal combinations of mechanical properties but suffer from limited mechanical tunability, limited long-term stability, and low-throughput volumes that stem from limitations in additive manufacturing techniques. Based on natural self-assembly of polymeric emulsions via spinodal decomposition, here we demonstrate a concept for the scalable fabrication of nonperiodic, shell-based ceramic materials with ultralow densities, possessing features on the order of tens of nanometers and sample volumes on the order of cubic centimeters. Guided by simulations of separation processes, we numerically show that the curvature of self-assembled shells can produce close to optimal stiffness scaling with density, and we experimentally demonstrate that a carefully chosen combination of topology, geometry, and base material results in superior mechanical resilience in the architected product. Our approach provides a pathway to harnessing self-assembly methods in the design and scalable fabrication of beyond-periodic and nonbeam-based nano-architected materials with simultaneous directional tunability, high stiffness, and unsurpassed recoverability with marginal deterioration.

scholarly journals Functionally Assembled Metal Platform as Lego-like Module System for Enhanced Mechanical Tunability and Biomolecules Delivery

2021 ◽  
pp. 109840
Author(s):  
Hyun Lee ◽  
Min-Kyu Lee ◽  
Kwang-Hee Cheon ◽  
In-Gu Kang ◽  
CheonIl Park ◽  
...  
Keyword(s):  
Mechanical Tunability ◽  
Module System

scholarly journals Mechanical Tunability of an Ultranarrow Spectral Feature of a Rare-Earth-Doped Crystal via Uniaxial Stress

2020 ◽  
Vol 13 (4) ◽  
Author(s):  
N. Galland ◽  
N. Lučić ◽  
B. Fang ◽  
S. Zhang ◽  
R. Le Targat ◽  
...  
Keyword(s):  
Rare Earth ◽  
Spectral Feature ◽  
Uniaxial Stress ◽  
Mechanical Tunability ◽  
Rare Earth Doped

scholarly journals Self-healing polyurethane-elastomer with mechanical tunability for multiple biomedical applications in vivo

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chenyu Jiang ◽  
Luzhi Zhang ◽  
Qi Yang ◽  
Shixing Huang ◽  
Hongpeng Shi ◽  
...  
Keyword(s):  
Biomedical Engineering ◽  
Biomedical Applications ◽  
Disease Models ◽  
Polyurethane Elastomer ◽  
Self Healing ◽  
Physiological Conditions ◽  
Design And Synthesis ◽  
Mechanical Tunability ◽  
Tunable Mechanical Properties

AbstractThe unique properties of self-healing materials hold great potential in the field of biomedical engineering. Although previous studies have focused on the design and synthesis of self-healing materials, their application in in vivo settings remains limited. Here, we design a series of biodegradable and biocompatible self-healing elastomers (SHEs) with tunable mechanical properties, and apply them to various disease models in vivo, in order to test their reparative potential in multiple tissues and at physiological conditions. We validate the effectiveness of SHEs as promising therapies for aortic aneurysm, nerve coaptation and bone immobilization in three animal models. The data presented here support the translation potential of SHEs in diverse settings, and pave the way for the development of self-healing materials in clinical contexts.

scholarly journals A dual crosslinking strategy to tailor rheological properties of gelatin methacryloyl

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Miaomiao Zhou ◽  
Bae Hoon Lee ◽  
Lay Poh Tan
Keyword(s):  
Tissue Engineering ◽  
Three Dimensional ◽  
Emerging Technology ◽  
Solution Viscosity ◽  
3D Bioprinting ◽  
Cell Compatibility ◽  
Low Viscosity ◽  
The Poor ◽  
Isopeptide Bonds ◽  
Mechanical Tunability

3D bioprinting is an emerging technology that enables fabrication of three-dimensional organised cellular constructs. One of the major challenges in 3D bioprinting is to develop a material to meet the harsh requirements (cell-compatibility, printability, structural stability post-printing and bio-functionality to regulate cell behaviours) suitable for printing. Gelatin methacryloyl (GelMA) has recently emerged as an attractive biomaterial in tissue engineering, because it satisfies the requirements of bio-functionality and mechanical tunability. However, the poor rheological property such as low viscosity at body temperature inhibits its application in 3D bioprinting. In this work, an enzymatic crosslinking method triggered by Ca2+-independent microbial transglutaminase (MTGase) was introduced to catalyse isopeptide bonds formation between chains of GelMA, which could improve its rheological behaviours, specifically viscosity. By combining enzymatic crosslinking and photo crosslinking, it is possible to tune the solution viscosity and quickly stabilize the gelatin macromolecules at the same time. The results showed that the enzymatic crosslinking can increase the solution viscosity. Subsequent photo crosslinking could aid in fast stabilization of the structure and make handling easy.

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