Recent Advances in Multiresponsive Flexible Sensors towards E‐skin: A Delicate Design for Versatile Sensing

Small, Journal Year: 2021, Volume and Issue: 18(7)

Published: Nov. 25, 2021

Abstract Multiresponsive flexile sensors with strain, temperature, humidity, and other sensing abilities serving as real electronic skin (e‐skin) have manifested great application potential in flexible electronics, artificial intelligence (AI), Internet of Things (IoT). Although numerous sole function already been reported since the concept e‐skin, that mimics features human skin, was proposed about a decade ago, ones more capacities new emergences are urgently demanded. However, highly integrated sensitive multiresponsive functions becoming big thrust for detection body motions, physiological signals (e.g., blood pressure, electrocardiograms (ECG), electromyograms (EMG), sweat, etc.) environmental stimuli light, magnetic field, volatile organic compounds (VOCs)), which vital to real‐time all‐round health monitoring management. Herein, this review summarizes design, manufacturing, presents future challenges fabricating these next‐generation e‐skin wearable electronics.

Language: Английский

---

Smart Mechanoluminescent Phosphors: A Review of Strontium‐Aluminate‐Based Materials, Properties, and Their Advanced Application Technologies

Advanced Science, Journal Year: 2022, Volume and Issue: 10(3)

Published: Nov. 13, 2022

Mechanoluminescence, a smart luminescence phenomenon in which light energy is directly produced by mechanical force, has recently received significant attention because of its important applications fields such as visible strain sensing and structural health monitoring. Up to present, hundreds inorganic organic mechanoluminescent materials have been discovered studied. Among them, strontium-aluminate-based are an class for fundamental research practical attributed their extremely low force/pressure threshold mechanoluminescence, efficient photoluminescence, persistent afterglow, relatively synthesis cost. This paper presents systematic comprehensive review luminescent materials' mechanoluminescence phenomena, mechanisms, material techniques, related applications. Besides summarizing the early latest on this system, outlook provided environmental, issue future wearable devices, advanced energy-saving lighting displays.

Language: Английский

---

Printable, flexible, breathable and sweatproof bifunctional sensors based on an all-nanofiber platform for fully decoupled pressure–temperature sensing application

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 452, P. 139174 - 139174

Published: Sept. 14, 2022

Language: Английский

---

Mechanoluminescence and Photoluminescence Heterojunction for Superior Multimode Sensing Platform of Friction, Force, Pressure, and Temperature in Fibers and 3D‐Printed Polymers

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(40)

Published: July 3, 2023

Endowing a single material with various types of luminescence, that is, exhibiting simultaneous optical response to different stimuli, is vital in fields. A photoluminescence (PL)- and mechanoluminescence (ML)-based multifunctional sensing platform built by combining heterojunctioned ZnS/CaZnOS:Mn2+ mechano-photonic materials using 3D-printing technique fiber spinning. ML-active particles are embedded micrometer-sized cellulose fibers for flexible devices capable emitting light driven mechanical force. Individually modified 3D-printed hard units exhibit intense ML deformation, such as impact friction, also fabricated. Importantly, they allow low-pressure up ≈100 bar, range previously inaccessible any other technique. Moreover, the developed manometer based on PL demonstrates superior high-pressure sensitivity ≈6.20 nm GPa-1 . Using this platform, four modes temperature detection can be achieved: excitation-band spectral shifts, emission-band bandwidth broadening, lifetime shortening. This work supports possibility mass production optoelectronic parts integrated scientific industrial tools apparatus.

Language: Английский

---

Bimodal Tactile Sensor without Signal Fusion for User-Interactive Applications

ACS Nano, Journal Year: 2022, Volume and Issue: 16(2), P. 2789 - 2797

Published: Jan. 21, 2022

Tactile sensors with multimode sensing ability are cornerstones of artificial skin for applications in humanoid robotics and smart prosthetics. However, the intuitive interference-free reading multiple tactile signals without involving complex algorithms calculations remains a challenge. Herein pressure–temperature bimodal sensor any interference is demonstrated by combining fundamentally different mechanisms optics electronics, enabling simultaneous independent pressure temperature elimination signal separation calculations. The comprises mechanoluminescent hybrid ZnS–CaZnOS poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) thermoresistant material, endowing unambiguous transduction into optical electrical signals, respectively. This device exhibits highest sensitivity −0.6% °C–1 range 21–60 °C visual applied forces at low limitation 2 N. light-emitting characteristics this permit user-interactive encrypted communication as well monitoring, along wireless transmission. work provides an unexplored solution to multimodal sensors, which can be extended other multifunctional devices.

Language: Английский

---

Visualizing Dynamic Mechanical Actions with High Sensitivity and High Resolution by Near‐Distance Mechanoluminescence Imaging

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(36)

Published: July 12, 2022

Proportionally converting the applied mechanical energy into photons by individual mechanoluminescent (ML) micrometer-sized particles opens a new way to develop intelligent electronic skins as it promises high-resolution stress distribution visualization and fast response. However, big challenge for ML sensing technology is its low sensitivity in detecting stress. In this work, novel sensor with detection enhanced two orders of magnitude developed combining proposed near-distance imaging scheme an improved mechano-to-photon convertor. The main contributor realization maximum photon harvesting rate ≈80% scheme. shows high limit down ≈kPa level, spatial resolution 254 dpi, response interval 3.3 ms, which allows real-time complex actions such irregular solid contacts or fluid impacts, thus enables use skin, structural health monitoring, human-computer interaction.

Language: Английский

---

Regulating Exciton De‐Trapping of Te⁴⁺‐Doped Zero‐Dimensional Scandium‐Halide Perovskite for Fluorescence Thermometry with Record High Time‐Resolved Thermal Sensitivity

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(44)

Published: Aug. 21, 2023

Abstract Fluorescence thermometry has been propelled to the forefront of scientific attention due its high spatial resolution and remote non‐invasive detection. However, recent generations thermometers still suffer from limited thermal sensitivity ( S r ) below 10% change per Kelvin. Herein, this work presents an ideal temperature‐responsive fluorescence material through Te 4+ ‐doped 0D Cs 2 ScCl 5 ·H O, in which isolated polyhedrons endow highly localized electronic structures, strong electron–phonon coupling facilitates formation self‐trapped excitons (STEs). With rising temperature, dramatic asymmetric expansion soft lattice induces increased defects, exciton–phonon coupling, low activation energy, evokes a rapid de‐trapping process STEs, enabling several orders magnitude changes lifetime over narrow temperature range. After regulating with different doping, record‐high (27.36% K −1 lifetime‐based detection is achieved at 325 K. The robust stability against multiple heating/cooling cycles long‐term measurements enables uncertainty 0.067 Further, developed are demonstrated for local monitoring operating on internal components. It believed that constitutes solid step towards building next generation ultrasensitive based low‐dimensional metal halides.

Language: Английский

---

Multimode Emission from Lanthanide‐Based Metal–Organic Frameworks for Advanced Information Encryption

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(43)

Published: June 25, 2023

Abstract Although remarkable progress on luminescent materials is made in advanced optical information storage and anti‐counterfeiting applications, many challenges still remain these fields. Currently, most are based a single photoluminescent model that can be easily imitated by substitutes. In this work, series of multimodal emission lanthanide‐based metal–organic frameworks (MOFs) developed, where they emit red green light originating from Eu 3+ Tb under ultraviolet irradiation. Meanwhile, 980 nm near‐infrared laser irradiation, MOFs show cyan upconversion cooperative luminescence derived Yb characteristic lanthanide activators (Eu , or Ho ), respectively. Based the integrated functionality, functional applications successfully designed, which indicates features detected lamps (254 393 nm) laser. And, unique high level security application, would sufficiently complex to forged.

Language: Английский

---

Quantifying the interfacial triboelectricity in inorganic-organic composite mechanoluminescent materials

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 26, 2024

Abstract Mechanoluminescence (ML) sensing technologies open up new opportunities for intelligent sensors, self-powered displays and wearable devices. However, the emission efficiency of ML materials reported so far still fails to meet growing application requirements due insufficiently understood mechano-to-photon conversion mechanism. Herein, we propose quantify ability different phases gain or lose electrons under friction (defined as triboelectric series), reveal that inorganic-organic interfacial triboelectricity is a key factor in determining composites. A positive correlation between difference series intensity established composites, 20-fold increase finally obtained by selecting an appropriate combination. The triboelectricity-regulated further demonstrated multi-interface systems include inorganic phosphor-organic matrix organic matrix-force applicator interfaces, again confirmed self-oxidization reduction centers continuous mechanical stimulus. This work not only gives direct experimental evidences underlying mechanism ML, but also provides guidelines rationally designing high-efficiency materials.

Language: Английский

---

Mechanoluminescent functional devices: Developments, applications and prospects

Nano Energy, Journal Year: 2024, Volume and Issue: 122, P. 109325 - 109325

Published: Jan. 23, 2024

Language: Английский

---