Multiple Weak H-Bonds Lead to Highly Sensitive, Stretchable, Self-Adhesive, and Self-Healing Ionic Sensors

2019 ◽  
Vol 11 (8) ◽  
pp. 7755-7763 ◽  
Author(s):  
Haiyan Qiao ◽  
Pengfei Qi ◽  
Xiaohui Zhang ◽  
Linan Wang ◽  
Yeqiang Tan ◽  
...  
Keyword(s):  
Self Healing ◽  
Highly Sensitive

Fast self-healing multifunctional polyvinyl alcohol nano-organic composite hydrogel as building blocks for highly sensitive strain/pressure sensors

2021 ◽  
Author(s):  
Wenhao Zhao ◽  
Dongzhi Zhang ◽  
Yan Yang ◽  
Chen Du ◽  
Bao Zhang
Keyword(s):  
Polyvinyl Alcohol ◽  
Human Computer Interaction ◽  
Pressure Sensors ◽  
Building Blocks ◽  
Composite Hydrogel ◽  
Sensitive Strain ◽  
Self Healing ◽  
Wearable Sensor ◽  
Hybrid Hydrogel ◽  
Highly Sensitive

The conductive and biocompatible hybrid hydrogel was successfully assembled into an adhesive, flexible wearable sensor for ultra-sensitive human-computer interaction and smart detection, which holds excellent self-healing capability. This conductive, repairable...

Polydiacetylene hydrogel self-healing capacitive strain sensor

2020 ◽  
Vol 8 (18) ◽  
pp. 6034-6041 ◽  
Author(s):  
V. Kesava Rao ◽  
Nitzan Shauloff ◽  
XiaoMeng Sui ◽  
H. Daniel Wagner ◽  
Raz Jelinek
Keyword(s):  
Strain Sensor ◽  
Mechanical Deformation ◽  
Human Motion ◽  
Self Healing ◽  
Highly Sensitive ◽  
Capacitive Strain

Highly sensitive and stretchable PDA–PAA–Cr3+ hydrogel capacitive strain sensor is fabricated and used to monitor mechanical deformation and human motion.

Polyelectrolyte complex-based self-healing, fatigue-resistant and anti-freezing hydrogels as highly sensitive ionic skins

2020 ◽  
Vol 8 (7) ◽  
pp. 3667-3675 ◽  
Author(s):  
Siheng Li ◽  
Hongyu Pan ◽  
Yuting Wang ◽  
Junqi Sun
Keyword(s):  
Mechanical Strength ◽  
Polyelectrolyte Complex ◽  
Mechanical Damage ◽  
High Sensitivity ◽  
Self Healing ◽  
High Mechanical Strength ◽  
Highly Sensitive ◽  
Sensing Performance

Hydrogel-based self-healing ionic skins possess high mechanical strength, excellent resilience, anti-freezing properties and high sensitivity and can heal fatigue and mechanical damage to restore the original sensing performance.

Ultra elastic, stretchable, self-healing conductive hydrogels with tunable optical properties for highly sensitive soft electronic sensors

2020 ◽  
Vol 8 (46) ◽  
pp. 24718-24733
Author(s):  
Meng Wu ◽  
Jingsi Chen ◽  
Yuhao Ma ◽  
Bin Yan ◽  
Mingfei Pan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Human Activities ◽  
Ionic Conductor ◽  
Self Healing ◽  
Dynamic Covalent Chemistry ◽  
Highly Sensitive ◽  
Tunable Optical Properties ◽  
Conductive Hydrogels ◽  
Electronic Sensors

A self-healing hydrogel ionic conductor has been developed by combining dynamic covalent chemistry with nanofiller reinforcement and micelle crosslinking, and used for sensing of diverse human activities.

Self-healing, Mechanically Robust, and 3D Printable Ionogel for Highly Sensitive and Long-Term Reliable Ionotronics

2022 ◽  
Author(s):  
Manwen Zhang ◽  
Xinglin Tao ◽  
Ran Yu ◽  
Yangyang He ◽  
Xinpan Li ◽  
...  
Keyword(s):  
Self Healing ◽  
Human Machine Interaction ◽  
Flexible Sensors ◽  
Electrical Signals ◽  
Highly Sensitive ◽  
Machine Interaction

Flexible sensors which can transduce various stimuli (e.g., strain, pressure, temperature) into electrical signals are highly in demand due to the development of human-machine interaction. However, it is still a...

Hydrogels from natural egg white with extraordinary stretchability, direct-writing 3D printability and self-healing for fabrication of electronic sensors and actuators

2019 ◽  
Vol 7 (42) ◽  
pp. 24626-24640 ◽  
Author(s):  
Qiang Chang ◽  
Mohammad Ali Darabi ◽  
Yuqing Liu ◽  
Yunfan He ◽  
Wen Zhong ◽  
...  
Keyword(s):  
Egg White ◽  
Self Healing ◽  
Direct Writing ◽  
Sensors And Actuators ◽  
Electronic Sensor ◽  
Highly Sensitive ◽  
Electronic Sensors

An alkali-induced egg white hydrogel achieved ultra-stretchability, self-healing and direct 3D printability for highly sensitive electronic sensor and humidity-responsive actuator fabrication.

An in situ and rapid self-healing strategy enabling a stretchable nanocomposite with extremely durable and highly sensitive sensing features

2021 ◽  
Author(s):  
Yang Liu ◽  
Xiangqian Fan ◽  
Weimin Feng ◽  
Xinlei Shi ◽  
Fengchao Li ◽  
...  
Keyword(s):  
Self Healing ◽  
Strain Sensing ◽  
Highly Sensitive

A spontaneous, rapid, and in situ self-healing strategy was proposed to boost both the durability and sensitivity of stretchable strain-sensing materials.

Ovarian Dysfunction in Fetally Irradiated Beagles

1977 ◽  
Vol 35 ◽  
pp. 658-659
Author(s):  
T. M. Seed ◽  
M. H. Sanderson ◽  
D. L. Gutzeit ◽  
T. E. Fritz ◽  
D. V. Tolle ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Low Dose ◽  
Long Term Effects ◽  
Ovarian Dysfunction ◽  
Dose Rates ◽  
Highly Sensitive ◽  
Microscopic Evaluation ◽  
Ovarian Pathology ◽  
Normal Offspring

The developing mammalian fetus is thought to be highly sensitive to ionizing radiation. However, dose, dose-rate relationships are not well established, especially the long term effects of protracted, low-dose exposure. A previous report (1) has indicated that bred beagle bitches exposed to daily doses of 5 to 35 R 60Co gamma rays throughout gestation can produce viable, seemingly normal offspring. Puppies irradiated in utero are distinguishable from controls only by their smaller size, dental abnormalities, and, in adulthood, by their inability to bear young.We report here our preliminary microscopic evaluation of ovarian pathology in young pups continuously irradiated throughout gestation at daily (22 h/day) dose rates of either 0.4, 1.0, 2.5, or 5.0 R/day of gamma rays from an attenuated 60Co source. Pups from non-irradiated bitches served as controls. Experimental animals were evaluated clinically and hematologically (control + 5.0 R/day pups) at regular intervals.

Fluorescence ratio imaging of dynamic intracellular ionic signals

1988 ◽  
Vol 46 ◽  
pp. 42-43
Author(s):  
R. Y. Tsien ◽  
A. Minta ◽  
M. Poenie ◽  
J.P.Y. Kao ◽  
A. Harootunian
Keyword(s):  
Binding Sites ◽  
Living Cells ◽  
Molecular Engineering ◽  
Ph Indicators ◽  
Highly Sensitive ◽  
Fluorescence Ratio Imaging ◽  
Ratio Imaging ◽  
Technical Advances ◽  
Indicator Dyes ◽  
Fluorescein Dyes

Recent technical advances now enable the continuous imaging of important ionic signals inside individual living cells with micron spatial resolution and subsecond time resolution. This methodology relies on the molecular engineering of indicator dyes whose fluorescence is strong and highly sensitive to ions such as Ca2+, H+, or Na+, or Mg2+. The Ca2+ indicators, exemplified by fura-2 and indo-1, derive their high affinity (Kd near 200 nM) and selectivity for Ca2+ to a versatile tetracarboxylate binding site3 modeled on and isosteric with the well known chelator EGTA. The most commonly used pH indicators are fluorescein dyes (such as BCECF) modified to adjust their pKa's and improve their retention inside cells. Na+ indicators are crown ethers with cavity sizes chosen to select Na+ over K+: Mg2+ indicators use tricarboxylate binding sites truncated from those of the Ca2+ chelators, resulting in a more compact arrangement of carboxylates to suit the smaller ion.

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