A breathable, biodegradable, antibacterial, and self-powered electronic skin based on all-nanofiber triboelectric nanogenerators

Mimicking the comprehensive functions of human sensing via electronic skins (e-skins) is highly interesting for the development of human-machine interactions and artificial intelligences. Some e-skins with high sensitivity and stability were developed; however, little attention is paid to their comfortability, environmental friendliness, and antibacterial activity. Here, we report a breathable, biodegradable, and antibacterial e-skin based on all-nanofiber triboelectric nanogenerators, which is fabricated by sandwiching silver nanowire (Ag NW) between polylactic-co-glycolic acid (PLGA) and polyvinyl alcohol (PVA). With micro-to-nano hierarchical porous structure, the e-skin has high specific surface area for contact electrification and numerous capillary channels for thermal-moisture transfer. Through adjusting the concentration of Ag NW and the selection of PVA and PLGA, the antibacterial and biodegradable capability of e-skins can be tuned, respectively. Our e-skin can achieve real-time and self-powered monitoring of whole-body physiological signal and joint movement. This work provides a previously unexplored strategy for multifunctional e-skins with excellent practicability.

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A High Sensitivity Self-Powered Wind Speed Sensor Based on Triboelectric Nanogenerators (TENGs)

Sensors ◽

10.3390/s21092951 ◽

2021 ◽

Vol 21 (9) ◽

pp. 2951

Author(s):

Yangming Liu ◽

Jialin Liu ◽

Lufeng Che

Keyword(s):

Wind Speed ◽

High Sensitivity ◽

Electrical Signal ◽

Geometrical Parameters ◽

Sensor Systems ◽

Speed Sensor ◽

Speed Range ◽

Self Powered ◽

Triboelectric Nanogenerators ◽

Application Prospects

Triboelectric nanogenerators (TENGs) have excellent properties in harvesting tiny environmental energy and self-powered sensor systems with extensive application prospects. Here, we report a high sensitivity self-powered wind speed sensor based on triboelectric nanogenerators (TENGs). The sensor consists of the upper and lower two identical TENGs. The output electrical signal of each TENG can be used to detect wind speed so that we can make sure that the measurement is correct by two TENGs. We study the influence of different geometrical parameters on its sensitivity and then select a set of parameters with a relatively good output electrical signal. The sensitivity of the wind speed sensor with this set of parameters is 1.79 μA/(m/s) under a wind speed range from 15 m/s to 25 m/s. The sensor can light 50 LEDs at the wind speed of 15 m/s. This work not only advances the development of self-powered wind sensor systems but also promotes the application of wind speed sensing.

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Progress on Self-Powered Wearable and Implantable Systems Driven by Nanogenerators

Micromachines ◽

10.3390/mi12060666 ◽

2021 ◽

Vol 12 (6) ◽

pp. 666

Author(s):

Lanxin Yang ◽

Zhihao Ma ◽

Yun Tian ◽

Bo Meng ◽

Zhengchun Peng

Keyword(s):

Mechanical Energy ◽

Rapid Development ◽

Electronic Devices ◽

High Sensitivity ◽

Self Powered ◽

Triboelectric Nanogenerators ◽

The Internet Of Things ◽

Piezoelectric Nanogenerators

With the rapid development of the internet of things (IoT), sustainable self-powered wireless sensory systems and diverse wearable and implantable electronic devices have surged recently. Under such an opportunity, nanogenerators, which can convert continuous mechanical energy into usable electricity, have been regarded as one of the critical technologies for self-powered systems, based on the high sensitivity, flexibility, and biocompatibility of piezoelectric nanogenerators (PENGs) and triboelectric nanogenerators (TENGs). In this review, we have thoroughly analyzed the materials and structures of wearable and implantable PENGs and TENGs, aiming to make clear how to tailor a self-power system into specific applications. The advantages in TENG and PENG are taken to effectuate wearable and implantable human-oriented applications, such as self-charging power packages, physiological and kinematic monitoring, in vivo and in vitro healing, and electrical stimulation. This review comprehensively elucidates the recent advances and future outlook regarding the human body’s self-powered systems.

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A self-powered and high sensitivity acceleration sensor with V-Q-a model based on triboelectric nanogenerators (TENGs)

Nano Energy ◽

10.1016/j.nanoen.2019.104228 ◽

2020 ◽

Vol 67 ◽

pp. 104228 ◽

Cited By ~ 14

Author(s):

Chaoran Liu ◽

Yishao Wang ◽

Nan Zhang ◽

Xun Yang ◽

Zuankai Wang ◽

...

Keyword(s):

High Sensitivity ◽

Acceleration Sensor ◽

Model Based ◽

Self Powered ◽

Triboelectric Nanogenerators

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Nanoporous Quasi-High-Entropy Alloy Microspheres

Metals ◽

10.3390/met9030345 ◽

2019 ◽

Vol 9 (3) ◽

pp. 345 ◽

Cited By ~ 3

Author(s):

Lianzan Yang ◽

Yongyan Li ◽

Zhifeng Wang ◽

Weimin Zhao ◽

Chunling Qin

Keyword(s):

Mechanical Properties ◽

Solid Solution ◽

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

High Specific Surface Area ◽

High Entropy Alloy ◽

Face Centered Cubic ◽

High Entropy ◽

Hierarchical Porous

High-entropy alloys (HEAs) present excellent mechanical properties. However, the exploitation of chemical properties of HEAs is far less than that of mechanical properties, which is mainly limited by the low specific surface area of HEAs synthesized by traditional methods. Thus, it is vital to develop new routes to fabricate HEAs with novel three-dimensional structures and a high specific surface area. Herein, we develop a facile approach to fabricate nanoporous noble metal quasi-HEA microspheres by melt-spinning and dealloying. The as-obtained nanoporous Cu30Au23Pt22Pd25 quasi-HEA microspheres present a hierarchical porous structure with a high specific surface area of 69.5 m2/g and a multiphase approximatively componential solid solution characteristic with a broad single-group face-centered cubic XRD pattern, which is different from the traditional single-phase or two-phase solid solution HEAs. To differentiate, these are named quasi-HEAs. The synthetic strategy proposed in this paper opens the door for the synthesis of porous quasi-HEAs related materials, and is expected to promote further applications of quasi-HEAs in various chemical fields.

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Enhancement of self-powered humidity sensing of graphene oxide–based triboelectric nanogenerators by addition of graphene oxide nanoribbons

Microchimica Acta ◽

10.1007/s00604-021-04921-y ◽

2021 ◽

Vol 188 (8) ◽

Author(s):

Faezeh Ejehi ◽

Raheleh Mohammadpour ◽

Elham Asadian ◽

Somayeh Fardindoost ◽

Pezhman Sasanpour

Keyword(s):

Graphene Oxide ◽

Humidity Sensing ◽

Graphene Oxide Nanoribbons ◽

Self Powered ◽

Triboelectric Nanogenerators

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Triboelectric Nanogenerators for Self‐Powered Wound Healing

Advanced Healthcare Materials ◽

10.1002/adhm.202100975 ◽

2021 ◽

pp. 2100975

Author(s):

Xiao Xiao ◽

Ardo Nashalian ◽

Alberto Libanori ◽

Yunsheng Fang ◽

...

Keyword(s):

Wound Healing ◽

Self Powered ◽

Triboelectric Nanogenerators

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Diatom Bio-Silica and Cellulose Nanofibril for Bio-Triboelectric Nanogenerators and Self-Powered Breath Monitoring Masks

ACS Applied Materials & Interfaces ◽

10.1021/acsami.0c18227 ◽

2020 ◽

Author(s):

Araz Rajabi-Abhari ◽

Jong-Nam Kim ◽

Jeehee Lee ◽

Rassoul Tabassian ◽

Manmatha Mahato ◽

...

Keyword(s):

Cellulose Nanofibril ◽

Breath Monitoring ◽

Self Powered ◽

Triboelectric Nanogenerators

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Triboelectric Effect Enabled Self-Powered, Point-of-Care Diagnostics: Opportunities for Developing ASSURED and REASSURED Devices

Micromachines ◽

10.3390/mi12030337 ◽

2021 ◽

Vol 12 (3) ◽

pp. 337

Author(s):

Navneet Soin ◽

Sam J. Fishlock ◽

Colin Kelsey ◽

Suzanne Smith

Keyword(s):

High Efficiency ◽

Resource Constraints ◽

Point Of Care ◽

Wearable Sensors ◽

Middle Income ◽

Physiological Signal ◽

Point Of Care Diagnostics ◽

Self Powered ◽

Triboelectric Nanogenerators ◽

Triboelectric Effect

The use of rapid point-of-care (PoC) diagnostics in conjunction with physiological signal monitoring has seen tremendous progress in their availability and uptake, particularly in low- and middle-income countries (LMICs). However, to truly overcome infrastructural and resource constraints, there is an urgent need for self-powered devices which can enable on-demand and/or continuous monitoring of patients. The past decade has seen the rapid rise of triboelectric nanogenerators (TENGs) as the choice for high-efficiency energy harvesting for developing self-powered systems as well as for use as sensors. This review provides an overview of the current state of the art of such wearable sensors and end-to-end solutions for physiological and biomarker monitoring. We further discuss the current constraints and bottlenecks of these devices and systems and provide an outlook on the development of TENG-enabled PoC/monitoring devices that could eventually meet criteria formulated specifically for use in LMICs.

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Functionalized Carbon Materials for Electronic Devices: A Review

Micromachines ◽

10.3390/mi10040234 ◽

2019 ◽

Vol 10 (4) ◽

pp. 234 ◽

Cited By ~ 18

Author(s):

Urooj Kamran ◽

Young-Jung Heo ◽

Ji Won Lee ◽

Soo-Jin Park

Keyword(s):

Carbon Nanotubes ◽

Carbon Materials ◽

Electronic Devices ◽

Pressure Sensors ◽

Future Generation ◽

High Specific Surface Area ◽

Synthetic Methods ◽

Energy Storage Devices ◽

Self Powered ◽

Walled Carbon Nanotubes

Carbon-based materials, including graphene, single walled carbon nanotubes (SWCNTs), and multi walled carbon nanotubes (MWCNTs), are very promising materials for developing future-generation electronic devices. Their efficient physical, chemical, and electrical properties, such as high conductivity, efficient thermal and electrochemical stability, and high specific surface area, enable them to fulfill the requirements of modern electronic industries. In this review article, we discuss the synthetic methods of different functionalized carbon materials based on graphene oxide (GO), SWCNTs, MWCNTs, carbon fibers (CFs), and activated carbon (AC). Furthermore, we highlight the recent developments and applications of functionalized carbon materials in energy storage devices (supercapacitors), inkjet printing appliances, self-powered automatic sensing devices (biosensors, gas sensors, pressure sensors), and stretchable/flexible wearable electronic devices.

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