Monitoring of lubrication and wear in-situ by triboelectrification under grease lubrication DOI Creative Commons

Yiming Lei,

Yange Feng, Zixiang Wu

et al.

Friction, Journal Year: 2024, Volume and Issue: 13(2), P. 9440938 - 9440938

Published: Dec. 6, 2024

The stable operation of friction pairs is one the most critical factors to maintain mechanical equipment. real-time monitoring lubrication state pair very important ensure normal machinery and realize early warning wear failure, but it also a big challenge. In this article, new in-situ system designed, which can monitor through triboelectrification. current acquisition module coefficient are integrated into high vacuum hydrodynamic oil film thickness measuring instrument explore intrinsic relationship between triboelectricity curves. When severe occurs, at interface no longer complete, accumulated triboelectric charge breaks down air causes discharge, suddenly increases from nanoampere level microampere level. time node when discharge occurs steel ball well consistent with suffers serious wear. According corresponding status pair, an designed operating in real signals. worn, will send out sound light alarm signals warnings mobile terminal Internet Things, providing reliable method for grease-lubricated machinery.

Language: Английский

Smart Contact Lenses—A Step towards Non-Invasive Continuous Eye Health Monitoring DOI Creative Commons
Nikolay L. Kazanskiy, Svetlana N. Khonina, Muhammad Ali Butt

et al.

Biosensors, Journal Year: 2023, Volume and Issue: 13(10), P. 933 - 933

Published: Oct. 18, 2023

According to the age-old adage, while eyes are often considered gateway soul, they might also provide insights into a more pragmatic aspect of our health: blood sugar levels. This potential breakthrough could be realized through development smart contact lenses (SCLs). Although were first developed for eyesight correction, new uses have recently become available. In near future, it possible monitor variety ocular and systemic disorders using lens sensors. Within realm glaucoma, SCLs present novel prospect, offering potentially superior avenue compared traditional management techniques. These introduce possibility non-invasive continuous monitoring intraocular pressure (IOP) enabling personalized administration medication as when needed. convergence holds great promise advancing glaucoma care. this review, recent developments in SCLs, including their applications, such IOP glucose monitoring, briefly discussed.

Language: Английский

Citations

29
Artificial piezoelectric metamaterials DOI

Ziyan Gao,

Yu Lei,

Zhanmiao Li

et al.

Progress in Materials Science, Journal Year: 2025, Volume and Issue: unknown, P. 101434 - 101434

Published: Jan. 1, 2025

Citations

1
Realization of flexible in-memory computing in a van der Waals ferroelectric heterostructure tri-gate transistor DOI

Xinzhu Gao,

Quan Chen,

Qinggang Qin

et al.

Nano Research, Journal Year: 2023, Volume and Issue: 17(3), P. 1886 - 1892

Published: Aug. 1, 2023

Language: Английский

Citations

21
PVDF Nanostructures Characterizations and Techniques for Enhanced Piezoelectric Response: A Review DOI
Germein Magdy, Ahmed H. Hassanin, Ishac Kandas

et al.

Materials Chemistry and Physics, Journal Year: 2024, Volume and Issue: 325, P. 129760 - 129760

Published: July 26, 2024

Language: Английский

Citations

8
Stretchable spring‐sheathed yarn sensor for 3D dynamic body reconstruction assisted by transfer learning DOI Creative Commons
Ronghui Wu, Liyun Ma, Zhiyong Chen

et al.

InfoMat, Journal Year: 2024, Volume and Issue: 6(4)

Published: Feb. 29, 2024

Abstract A wearable sensing system that can reconstruct dynamic 3D human body models for virtual cloth fitting is highly important in the era of information and metaverse. However, few research has been conducted regarding conformal sensors accurately measuring circumferences reshaping. Here, we develop a stretchable spring‐sheathed yarn sensor (SSYS) as smart ruler, precisely circumference bodies long‐term tracking movement reconstruction. The SSYS robust property, high resilience, stability (>18 000), ultrafast response (12 ms) to external deformation. It also washable, wearable, tailorable, durable long‐time wearing. Moreover, geometric, mechanical behaviors are systematically investigated both theoretically experimentally. In addition, transfer learning algorithm bridges discrepancy real performance developed, enabling small measurement error 1.79%, noticeably lower than traditional algorithm. Furtherly, numerically consistent with actual reconstructed. reconstruction based on wearing enables excellent shirt customization efficient manner. This technology shows great potential human‐computer interaction, intelligent fitting, specialized protection, sports activities, physiological health tracking. image

Language: Английский

Citations

7
Review of Piezoelectric Properties and Power Output of PVDF and Copolymer-Based Piezoelectric Nanogenerators DOI Creative Commons

Neelesh Bhadwal,

Ridha Ben Mrad,

Kamran Behdinan

et al.

Nanomaterials, Journal Year: 2023, Volume and Issue: 13(24), P. 3170 - 3170

Published: Dec. 18, 2023

The highest energy conversion efficiencies are typically shown by lead-containing piezoelectric materials, but the harmful environmental impacts of lead and its toxicity limit future use. At bulk scale, lead-based materials have significantly higher properties when compared to lead-free materials. However, at nanoscale, material can be larger than scale. Poly(vinylidene fluoride) (PVDF) fluoride-co-trifluoroethylene) (PVDF-TrFE) nanomaterials reviewed their suitability for use in nanogenerators (PENGs) is determined. impact different PVDF/PVDF-TrFE composite structures on power output explained. Strategies improve given. Overall, this review finds that increased nanoscale. these values still lower ceramics If sole goal developing a PENG maximize power, nanoscale should considered. brittle, thus encapsulation PVDF way increase flexibility PENGs. offers advantage being nontoxic biocompatible, which useful many applications.

Language: Английский

Citations

11
Novel biosensor for sarcosine detection in prostate cancer: Combining molecular imprinted polymer and aptamer strategies DOI

Fatemeh Hamdi,

Mahmoud Roushani, S. Jafar Hoseini

et al.

Microchemical Journal, Journal Year: 2024, Volume and Issue: 208, P. 112429 - 112429

Published: Dec. 12, 2024

Language: Английский

Citations

4
Електронна структура та можливість експери-ментального моніторингу фазового складу кристалів полівініліденфториду (PVDF) DOI

Z. Baranchykov,

Yu. Hizhnyi,

O. Makarenko

et al.

Ukrainian Journal of Physics, Journal Year: 2025, Volume and Issue: 70(1), P. 24 - 24

Published: Jan. 15, 2025

Органiчний полiмер полiвiнiлiденфториду (PVDF) є перспективним та комерцiйно привабливим матерiалом для сучасних потреб нанотехнологiй i мiкроелектронiки бiомедицини. Детектування фазового складу сумiшей PVDF важливою технологiчною задачею. В роботi представлено результати ab initio розрахункiв електронної зонної структури трьох найбiльш розповсюджених фаз кристалiв полiвiнiлiденфториду, α-, β- γ-PVDF. Одержано проаналiзовано структуру одноелектронних зон, парцiальних густин електронних станiв, просторових розподiлiв гу-стини, спектрiв дiелекричних сталих, комплексного показника заломлення, поглинання вiдбивання, спектри iнфрачервоного поглинання, комбiнацiйного розсiювання рентґенограми γ-фаз PVDF. Проведений аналiз результатiв дозволив зробити ряд висновкiв щодо особливостей формування оптичних властивостей кристала PVDF, а також деякi передбачення можливостi експериментального монiторингу цiєї сполуки. Встановлено, що детектування одночасної наявностi α-(або γ-) фази в зразках може бути ефективно здiйснене методами спектроскопiї вiдбивання дiапазонi вакуумного ультрафiолету, розсiювання, рентґенофазного аналiзу. Видiлити ж наявнiсть α-фази на фонi γ-фази зазначеними буде практично неможливо.

Citations

0
Multifunctional composite ionogel-based sensors for chronic disease surveillance and health monitoring DOI

Yufang Liao,

Longzhang Niu,

Jing‐han Song

et al.

Composites Part B Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112450 - 112450

Published: March 1, 2025

Language: Английский

Citations

0
A self-healing aqueous ammonium-ion micro batteries based on PVA-NH 4Cl hydrogel electrolyte and MXene-integrated perylene anode DOI Creative Commons

Ke Niu,

Junjie Shi, Long Zhang

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: unknown

Published: May 21, 2024

The successful study of self-healing aqueous micro batteries (AMBs) which inherit the advantages and have ability to automatically repair damage is great significance for development smart wearable portable electronic devices. However, rate performance related power density developed AMBs using metal ions as charge carriers limited, due strong interaction between electrode materials. Therefore, there potential developing NH4+ AMBs, because outstanding such extremely abundant reserves, smaller hydrated ion radius little molar mass. selfhealing still an challenge difficulty in hydrogels instability anode Even though, firstly based on tailoring hydrogel electrolyte MXeneintegrated perylene were successfully assembled. As expected, exhibit excellent energy (82.48 μWh·cm−2) (3.09 mW·cm−2), cycle life (81.67% after 3000 GCD cycles), flexibility (95.68% under 180°) (94.16% 10th cycles).

Language: Английский

Citations

2