A5072457655- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Tactile and Sensory Interactions
- Supercapacitor Materials and Fabrication
- ZnO doping and properties
- Innovative Energy Harvesting Technologies
- Organic Light-Emitting Diodes Research
- Advanced Materials and Mechanics
- Dielectric materials and actuators
- Electrospun Nanofibers in Biomedical Applications
- 2D Materials and Applications
- Perovskite Materials and Applications
- Silk-based biomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Organic Electronics and Photovoltaics
- Thin-Film Transistor Technologies
- Polydiacetylene-based materials and applications
- TiO2 Photocatalysis and Solar Cells
- Solar-Powered Water Purification Methods
- Nanomaterials and Printing Technologies
- Muscle activation and electromyography studies
- Advanced Photocatalysis Techniques
Samsung (South Korea)
2015-2024
Sungkyunkwan University
2012-2021
Institute of Nanotechnology
2016
Government of the Republic of Korea
2015
Suwon Research Institute
2015
Here we report a fully flexible, foldable nanopatterned wearable triboelectric nanogenerator (WTNG) with high power-generating performance and mechanical robustness. Both silver (Ag)-coated textile polydimethylsiloxane (PDMS) nanopatterns based on ZnO nanorod arrays Ag-coated template were used as active materials. A output voltage current of about 120 V 65 μA, respectively, observed from PDMS-based WTNG, while an 30 20 μA obtained by the non-nanopatterned flat WTNG under same compressive...
Here micropatterned poly(vinylidenefluoride‐ co ‐trifluoroethylene) (P(VDF‐TrFE)) films‐based piezoelectric nanogenerators (PNGs) with high power‐generating performance for highly sensitive self‐powered pressure sensors are demonstrated. The microstructured P(VDF‐TrFE)‐based PNGs reveal nearly five times larger power output compared to a flat film‐based PNG. micropatterning of P(VDF‐TrFE) polymer makes itself ultrasensitive in response mechanical deformation. application is demonstrated...
Low output current represents a critical challenge that has interrupted the use of triboelectric nanogenerators (TNGs) in wide range applications as sustainable power sources. Many approaches (e.g., operation at high frequency, parallel stacks individual devices, and hybridization with other energy harvesters) remain limited solving low from TNGs. Here, nanocomposite material system having superior surface charge density active is reported. The consists dielectric ceramic material, barium...
A piezopotential-powered active matrix strain sensor array based on a piezopotential-gated graphene transistor (GT) is demonstrated using piezoelectric polymer. The the GT exhibits excellent performance, including ultrahigh sensitivity (gauge factor = 389) and good durability (>3000 bending releasing cycles) with minimum detectable at 0.008%.
A silk nanofiber-networked bio-triboelectric generator (Silk Bio-TEG) is developed using an eco-friendly and sustainable biomaterial with strong hydrogen bonding between peptide blocks. The electrospun Silk Bio-TEG shows highly durable reliable energy harvesting performances due to its notably high surface-to-volume ratio, mechanically super-strong fibers, fracture tolerant behavior of nanofiber-networks. As a service our authors readers, this journal provides supporting information supplied...
Graphene tribotronics is introduced for touch-sensing applications such as electronic skins and touch screens. The devices are based on a coplanar coupling of triboelectrification current transport in graphene transistors. sensors ultrasensitive, fast, stable. Furthermore, they transparent flexible, can spatially map stimuli movement ball, multi-touch, etc. As service to our authors readers, this journal provides supporting information supplied by the authors. Such materials peer reviewed...
A fully packaged hemispheres-array-structured triboelectric nanogenerator (H-TENG) that can endure severe environments is reported. The hemispheres-array-structure plays a dual role as the material and an elastic "spring" to keep two opposite materials separated for inducing electrostatic effect during contact-separation cycle. H-TENGs be applicable active self-powered sensor array detect distribution of external pressure.
Harvesting human-motion energy for power-integrated wearable electronics could be a promising way to extend the battery-operation time of small low-power-consumption such as various sensors. For this purpose, fully stretchable triboelectric nanogenerator (S-TENG) that has been fabricated with knitted fabrics and integrated directly available materials techniques textile industry is introduced. This device adapted cloth movement can generate electricity under compression stretching. We...
Recently, piezoelectricity has been observed in 2D atomically thin materials, such as hexagonal‐boron nitride, graphene, and transition metal dichalcogenides (TMDs). Specifically, exfoliated monolayer MoS 2 exhibits a high that is comparable to of traditional piezoelectric materials. However, TMD materials are not regarded suitable for actual devices due their insufficient mechanical durability sustained operation while Bernal‐stacked bilayer lose noncentrosymmetry consequently...
We report a simple and effective approach for high performance PbZr0.52Ti0.48O3 (PZT) based flexible semi-transparent NGs that exploit the electrical, mechanical transparent properties of graphene. PZT are successfully demonstrated continuous driving liquid crystal display screen light emitting diode. A good quality film was deposited on Pt/Ti/SiO2/Si wafer by sol–gel method, exhibiting typical hysteresis loop in low voltage region. graphene used interdigitated electrode form to improve...
Negatively polarized ferroelectric polymer β-P(VDF-TrFE) shows higher positive triboelectric properties than skin, which could lead to new medical applications. Kelvin force microscope measurements and nanogenerator characterizations are performed demonstrate this property. In addition, how many negative charges exchanged by contact electrification between the negatively skin is estimated. As a service our authors readers, journal provides supporting information supplied authors. Such...
In recent years, smart light-emitting-type electronic devices for wearable applications have been required to flexibility and miniaturization, which limits the use of conventional bulk batteries. Therefore, it is important develop a self-powered light-emitting system. Our study demonstrates potential new luminescent textile system that emits light driven by random motions. The device ZnS:Cu-based motion-driven electroluminescent (TDEL) fabricated onto woven fibers ZnS:Cu-embedded PDMS...
Thermally induced strain-coupled highly stretchable and sensitive pyroelectric nanogenerators are demonstrated using a different thermal expansion coefficient in the micropatterned poly(vinylidenefluoride-cotrifluoroethylene) (P(VDF-TrFE)) polydimethyl-siloxane (PDMS) structures. When piezoelectric effects coupled, power-generating performance of nanogenerator is dramatically enhanced with high stretchability. The operates temperature changes ranging from extremely low to high. As service...
Noncontact-mode-operating triboelectric nanogenerators (TENGs), which directly avoid physical contact, are fascinating self-powered systems aimed at long-life operation and minimizing rubbing friction. As of now, there still drawbacks such as the electrostatic discharge (ESD) phenomenon on surface, results in poor output. Herein, a noncontact TENG (nc-TENG) is designed by using calcium copper titanate (CaCu3Ti4O12) with giant high permittivity, combined self-assembled monolayers...
Abstract Direct conversion of mechanical energy into direct current (DC) by triboelectric nanogenerators (TENGs) is one the desired features in terms efficiency. Although promising applications have been reported using effect, effective DC generating TENGs must be developed for practical purposes. Here, it that continuous generation within a TENG itself, without any circuitry, can achieved triggering air breakdown via triboelectrification. It demonstrated occurs combination with i) charge...
Abstract As vehicles become smarter, an alternative power solution will increasingly important for future vehicle development. With this context, a triboelectric nanogenerator (TENG) is proposed which fully sits on tires and consists of textile‐based tire materials. Both polydimethylsiloxane‐coated silver textile, serving as external tread material, nylon woven internal cord performing opposing materials, are well adaptable rolling tires. It demonstrated that material‐based TENG performs at...
Ferroelectric coupling effects on the energy-band structure of hybrid heterojunctions are investigated using photovoltaic devices with poly(3-hexylthiophene-2,5-diyl) (P3HT)/ZnO and poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)). The self-organized P(VDF-TrFE):P3HT photoactive layer forms a novel architecture consisting P3HT domains in P(VDF-TrFE) matrix. at interface p–n heterojunction is tuned by artificial control ferroelectric polarization material, consequently modulating...