Surface strain analysis of bending polymer films for flexible electronics and soft robotics

2020 ◽  
Author(s):  
Atsushi Shishido
Keyword(s):  
Polymer Films ◽  
Flexible Electronics ◽  
Strain Analysis ◽  
Surface Strain ◽  
Soft Robotics

An investigation of photoresists for use in optical strain analysis

1970 ◽  
Vol 5 (3) ◽  
pp. 162-168 ◽  
Author(s):  
A Luxmoore ◽  
R Hermann
Keyword(s):  
Strain Measurement ◽  
Strain Analysis ◽  
Surface Strain ◽  
High Contrast ◽  
Moire Method ◽  
Optical Strain

Some commercial photoresists have been examined to assess their suitability for use with the moiré method of surface-strain measurement. As most of these materials do not produce a pattern of high contrast directly, some etching and plating procedures are also described. Combined with correct illumination, these processes will produce grids of sufficient contrast for most applications.

scholarly journals Soft Robotics: Autonomous Motility of Polymer Films (Adv. Mater. 7/2018)

2018 ◽  
Vol 30 (7) ◽  
pp. 1870046 ◽  
Author(s):  
Benjamin E. Treml ◽  
Ruel N. McKenzie ◽  
Philip Buskohl ◽  
David Wang ◽  
Michael Kuhn ◽  
...  
Keyword(s):  
Polymer Films ◽  
Soft Robotics

Quantification of Murine Myocardial Infarct Size using 2D and 4D High Frequency Ultrasound

2022 ◽  
Author(s):  
Melissa M. Dann ◽  
Sydney Q. Clark ◽  
Natasha A. Trzaskalski ◽  
Conner C. Earl ◽  
Luke E. Schepers ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Infarct Size ◽  
Surface Area ◽  
Infarct Volume ◽  
Strain Analysis ◽  
The United States ◽  
Surface Strain ◽  
Coronary Artery Ligation ◽  
Myocardial Infarct Size

Background: Ischemic heart disease is the leading cause of death in the United States, Canada, and worldwide. Severe disease is characterized by coronary artery occlusion, loss of blood flow to the myocardium, and necrosis of tissue, with subsequent remodeling of the heart wall, including fibrotic scarring. The current study aims to demonstrate the efficacy of quantitating infarct size via 2D echocardiographic akinetic length and 4D echocardiographic infarct volume and surface area as in vivo analysis techniques. We further describe and evaluate a new surface area strain analysis technique for estimating myocardial infarction (MI) size after ischemic injury. Methods: Experimental MI was induced in mice via left coronary artery ligation. Ejection fraction and infarct size were measured through 2D and 4D echocardiography. Infarct size established via histology was compared to ultrasound-based metrics via linear regression analysis. Results: 2D echocardiographic akinetic length (r = 0.76, p = 0.03), 4D echocardiographic infarct volume (r = 0.85, p = 0.008) and surface area (r = 0.90, p = 0.002) correlate well with histology. While both 2D and 4D echocardiography were reliable measurement techniques to assess infarct, 4D analysis is superior in assessing asymmetry of the left ventricle and the infarct. Strain analysis performed on 4D data also provides additional infarct sizing techniques, which correlate with histology (surface strain: r = 0.94, p < 0.001, transmural thickness: r = 0.76, p = 0.001). Conclusions: 2D echocardiographic akinetic length, 4D echocardiography ultrasound and strain provide effective in vivo methods for measuring fibrotic scarring after MI.

4D printing of a self-morphing polymer driven by a swellable guest medium

Soft Matter ◽  
2018 ◽  
Vol 14 (5) ◽  
pp. 765-772 ◽  
Author(s):  
Jheng-Wun Su ◽  
Xiang Tao ◽  
Heng Deng ◽  
Cheng Zhang ◽  
Shan Jiang ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Flexible Electronics ◽  
Three Dimensional ◽  
Advanced Materials ◽  
Soft Robotics ◽  
4D Printing ◽  
3D Structures

There is a significant need of advanced materials that can be fabricated into functional devices with defined three-dimensional (3D) structures for application in tissue engineering, flexible electronics, and soft robotics.

Self-sintering liquid metal ink with laponite for flexible electronics

2021 ◽  
Author(s):  
Pengcheng Wu ◽  
Lu-yu Zhou ◽  
Shang Lv ◽  
JianZhong Fu ◽  
Yong He
Keyword(s):  
Liquid Metal ◽  
Flexible Electronics ◽  
Soft Robotics ◽  
Stretchable Electronics ◽  
Self Powered ◽  
Widespread Interest ◽  
Liquid Metal Ink ◽  
Flexible And Stretchable Electronics

Liquid-metal (LM)-based flexible and stretchable electronics have attracted widespread interest in soft robotics, self-powered devices and electronic skins. Although nanometerization can facilitate deposition and patterning of LMs onto substrates, subsequent...

scholarly journals A Terpyridine-Fe2+-Based Coordination Polymer Film for On-Chip Micro-Supercapacitor with AC Line-Filtering Performance

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1002
Author(s):  
Hongxing Wang ◽  
Feng Qiu ◽  
Chenbao Lu ◽  
Jinhui Zhu ◽  
Changchun Ke ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Polymer Films ◽  
Flexible Electronics ◽  
Electrode Materials ◽  
Interfacial Polymerization ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Redox Active ◽  
Ultrathin Polymer Films ◽  
On Chip

The preparation of redox-active, ultrathin polymer films as the electrode materials represents a major challenge for miniaturized flexible electronics. Herein, we demonstrated a liquid–liquid interfacial polymerization approach to a coordination polymer films with ultrathin thickness from tri(terpyridine)-based building block and iron atoms. The as-synthesized polymer films exhibit flexible properties, good redox-active and narrow bandgap. After directly transferred to silicon wafers, the on-chip micro-supercapacitors of TpPB-Fe-MSC achieved the high specific capacitances of 1.25 mF cm−2 at 50 mV s−1 and volumetric energy density of 5.8 mWh cm−3, which are superior to most of semiconductive polymer-based micro-supercapacitor (MSC) devices. In addition, as-fabricated on-chip MSCs exhibit typical alternating current (AC) line-filtering performance (−71.3° at 120 Hz) and a short resistance–capacitance (RC) time (0.06 ms) with the electrolytes of PVA/LiCl. This study provides a simple interfacial approach to redox-active polymer films for microsized energy storage devices.

Sign in / Sign up

Export Citation Format

Share Document