Wearable sensors for telehealth based on emerging materials and nanoarchitectonics

npj Flexible Electronics, Journal Year: 2023, Volume and Issue: 7(1)

Published: June 2, 2023

Abstract Wearable sensors have made significant progress in sensing physiological and biochemical markers for telehealth. By monitoring vital signs like body temperature, arterial oxygen saturation, breath rate, wearable provide enormous potential the early detection of diseases. In recent years, advancements been achieved development based on two-dimensional (2D) materials with flexibility, excellent mechanical stability, high sensitivity, accuracy introducing a new approach to remote real-time health monitoring. this review, we outline 2D materials-based biosensors system. The review focused five types sensors, which were classified according their mechanism, such as pressure, strain, electrochemical, optoelectronic, temperature sensors. material capabilities impact performance operation sensor are outlined. fundamental principles mechanism well applications explored. This concludes by discussing remaining obstacles future opportunities emerging telehealth field. We hope that report will be useful individuals who want design it generate ideas.

Language: Английский

---

Multifunctional wearable humidity and pressure sensors based on biocompatible graphene/bacterial cellulose bioaerogel for wireless monitoring and early warning of sleep apnea syndrome

Nano Energy, Journal Year: 2023, Volume and Issue: 108, P. 108215 - 108215

Published: Jan. 25, 2023

Language: Английский

---

Environmental Stability Stretchable Organic Hydrogel Humidity Sensor for Respiratory Monitoring with Ultrahigh Sensitivity

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: May 3, 2024

Abstract Real‐time monitoring of respiration plays a very important role in human health assessment, especially and analyzing during exercise sleep. However, traditional humidity sensors still have problems flexibility, sensitivity, durability, so there is an urgent need to develop with high stretchability, environmental resistance as respiratory applications. Here, based on the double network hydrogel structure polyvinyl alcohol polyacrylamide, highly sensitive, stretchable, environmentally stable organic sensor has been manufactured by using synergistic effect lithium chloride MXene. The shows rapid response range 40–85% RH, sensitivity −103.4%/% RH. In addition, it exhibits more than 3000% mechanical strain excellent resistance, which attributed chemical cross‐linking multiple hydroxyl groups glycerol forming rich hydrogen bonds water polymer chains. used for real‐time breathing sleep processes. This work provides new strategy preparing high‐performance, extensibility, stability hydrogel‐based monitoring.

Language: Английский

---

Hydrophilic hyaluronic acid-induced crumpling of Nb2CT nanosheets: Enabling fast humidity sensing based on primary battery

Sensors and Actuators B Chemical, Journal Year: 2023, Volume and Issue: 392, P. 134082 - 134082

Published: June 2, 2023

Language: Английский

---

Outstanding Humidity Chemiresistors Based on Imine-Linked Covalent Organic Framework Films for Human Respiration Monitoring

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: June 7, 2023

Human metabolite moisture detection is important in health monitoring and non-invasive diagnosis. However, ultra-sensitive quantitative extraction of respiration information real-time remains a great challenge. Herein, chemiresistors based on imine-linked covalent organic framework (COF) films with dual-active sites are fabricated to address this issue, which demonstrates an amplified humidity-sensing signal performance. By regulation monomers functional groups, these COF can be pre-engineered achieve high response, wide range, fast recovery time. Under the condition relative humidity ranging from 13 98%, COFTAPB-DHTA film-based sensor exhibits outstanding sensing performance expanded response value 390 times. Furthermore, values highly linear range below 60%, reflecting mechanism at molecular level. Based dual-site adsorption (-C=N-) (C-N) stretching vibrations, reversible tautomerism induced by hydrogen bonding water molecules demonstrated main intrinsic for effective detection. In addition, synthesized further exploited effectively detect human nasal oral breathing as well fabric permeability, will inspire novel designs humidity-detection devices.

Language: Английский

---

MXene sensors based on optical and electrical sensing signals: from biological, chemical, and physical sensing to emerging intelligent and bionic devices

PhotoniX, Journal Year: 2023, Volume and Issue: 4(1)

Published: May 5, 2023

Abstract Sensing devices are key nodes for information detection, processing, and conversion widely applied in different fields such as industrial production, environmental monitoring, defense. However, increasing demand of these has complicated the application scenarios diversified detection targets thereby promoting continuous development sensing materials methods. In recent years, Ti n+1 C n T x ( = 1, 2, 3) MXenes with outstanding optical, electrical, thermal, mechanical properties have been developed ideal candidates to apply physical, chemical, biological fields. this review, depending on optical electrical signals, we systematically summarize nine categories sensors strain, gas, fluorescence sensors. The excellent allow its further emerging intelligent bionic devices, including smart flexible E-skin, neural network coding learning, soft robot, well artificial eardrum, which all discussed briefly review. Finally, present a positive outlook potential future challenges perspectives MXene-based shown vigorous momentum applications can drive an number new technologies.

Language: Английский

---

Advances in Humidity Nanosensors and Their Application: Review

Sensors, Journal Year: 2023, Volume and Issue: 23(4), P. 2328 - 2328

Published: Feb. 20, 2023

As the technology revolution and industrialization have flourished in last few decades, development of humidity nanosensors has become more important for detection control industry production line, food preservation, chemistry, agriculture environmental monitoring. The new nanostructured materials fabrication are linked to better sensor performance, especially superior sensing, following intensive research into design synthesis nanomaterials years. Various nanomaterials, such as ceramics, polymers, semiconductor sulfide, carbon-based, triboelectrical nanogenerator (TENG), MXene, been studied their potential ability sense with structures nanowires, nanotubes, nanopores, monolayers. These synthesized via a wide range processes, including solution synthesis, anodization, physical vapor deposition (PVD), or chemical (CVD). sensing mechanism, process improvement nanostructure modulation different types mostly inexhaustible, but they all inseparable from goals effective response, high sensitivity low response–recovery time sensors. In this review, we focus on mechanism direct indirect various methods, nanomaterial geometry recent advances nanosensors. capacitive, resistive optical introduced, alongside illustration properties nanostructures materials. similarities differences humidity-sensitive mechanisms summarized. Applications IoT, human-body monitoring trends futures advancements.

Language: Английский

---

Polydopamine-modified MXene/cellulose nanofibers composite film for self-powered humidity sensing and humidity actuating

Nano Energy, Journal Year: 2024, Volume and Issue: 123, P. 109445 - 109445

Published: March 3, 2024

Language: Английский

---

Non-contact humidity monitoring: Boosting the performance of all-printed humidity sensor using PDDA-modified Ti3C2Tx nanoribbons

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149633 - 149633

Published: Feb. 24, 2024

Language: Английский

---

Wearable respiratory sensors for health monitoring

NPG Asia Materials, Journal Year: 2024, Volume and Issue: 16(1)

Published: Feb. 9, 2024

Abstract Real-time monitoring and early warning of human health conditions is an important function wearable devices. Along with the development Internet Things medical drive for detection treatment, devices will become increasingly in future. Compared traditional sensors, sensors mechanical softness deformability are able to adapt geometric nonlinearities deformations caused by motion that occurs application scenarios, thus ensuring stable effective signal output under various complex working conditions. Various novel sensing materials have been developed biomarkers respiration over past few years. Here, we summarize latest innovations respiratory highlighting dominant materials, designs, mechanisms, clinical implications. Finally, future challenges directions outlined toward promoting advancement field monitoring.

Language: Английский

---