Directly Electroplated Metallization on Flexible Substrates Based on Silver Nanowire Conductive Composite for Wearable Electronics

2021 ◽  
Author(s):  
Zhiqiang Lai ◽  
Tao Zhao ◽  
Pengli Zhu ◽  
Jing Xiang ◽  
Dan Liu ◽  
...  
Keyword(s):  
Silver Nanowire ◽  
Flexible Substrates ◽  
Wearable Electronics ◽  
Conductive Composite

Highly flexible and conductive composite films of silk fibroin and silver nanowires for optoelectronic devices

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 50878-50882 ◽  
Author(s):  
Ning Qi ◽  
Bing Zhao ◽  
Shu-Dong Wang ◽  
Salem S. Al-Deyab ◽  
Ke-Qin Zhang
Keyword(s):  
Silk Fibroin ◽  
Silver Nanowires ◽  
Composite Films ◽  
Optoelectronic Devices ◽  
Silver Nanowire ◽  
Ion Sputtering ◽  
Conductive Composite

Silver nanowire-coated silk fibroin composite films assisted by ion sputtering exhibited excellent flexibility, conductivity, which used to light LED device.

scholarly journals Electrical and Mechanical Properties of Ink Printed Composite Electrodes on Plastic Substrates

2018 ◽  
Vol 8 (11) ◽  
pp. 2101 ◽  
Author(s):  
Xinda Wang ◽  
Wei Guo ◽  
Ying Zhu ◽  
Xiaokang Liang ◽  
Fude Wang ◽  
...  
Keyword(s):  
Radio Frequency Identification ◽  
Silver Nanowire ◽  
Wearable Electronics ◽  
Composite Electrodes ◽  
Flexible Displays ◽  
Bending Tests ◽  
Conductive Inks ◽  
Plastic Substrates ◽  
Frequency Identification ◽  
Binder Free

Printed flexible electrodes with conductive inks have attracted much attention in wearable electronics, flexible displays, radio-frequency identification, etc. Conventional conductive inks contain large amount of polymer which would increase the electrical resistivity of as-printed electrodes and require high sintering temperature. Here, composite electrodes without cracks were printed on polyimide substrate using binder-free silver nanoparticle based inks with zero-dimensional (activated carbon), one-dimensional (silver nanowire and carbon nanotube) or two-dimensional (graphene) fillers. The effect of fillers on resistivity and flexibility of printed composite electrodes were evaluated. The graphene filler could reduce the resistivity of electrodes, reaching 1.7 × 10−7 Ω·m after low power laser sintering, while the silver nanowire filler improved their flexibility largely during bending tests. The microstructural changes were examined to understand the nanojoining process and their properties.

A multifunctional and highly stretchable electronic device based on silver nanowire/wrap yarn composite for a wearable strain sensor and heater

2019 ◽  
Vol 7 (43) ◽  
pp. 13468-13476 ◽  
Author(s):  
Min Zhao ◽  
Dawei Li ◽  
Jieyu Huang ◽  
Di Wang ◽  
Alfred Mensah ◽  
...  
Keyword(s):  
Electronic Device ◽  
Strain Sensor ◽  
Human Motion ◽  
Silver Nanowire ◽  
Thermal Therapy ◽  
Wearable Electronics ◽  
Human Motion Detection ◽  
Healthcare Monitoring ◽  
Highly Stretchable ◽  
Yarn Composite

Stretchable and wearable electronics, as a well-researched engineering frontier, can be applied in human motion detection, thermal therapy, personal healthcare monitoring and smart human–machine interactions.

scholarly journals High-performance compliant thermoelectric generators with magnetically self-assembled soft heat conductors for self-powered wearable electronics

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Byeongmoon Lee ◽  
Hyeon Cho ◽  
Kyung Tae Park ◽  
Jin-Sang Kim ◽  
Min Park ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Thermal Contact ◽  
Silver Nanowire ◽  
Thermoelectric Generators ◽  
Heat Sources ◽  
Wearable Electronics ◽  
Thermal Impedance ◽  
Ambient Conditions ◽  
Self Assembled ◽  
Self Powered

AbstractSoftening of thermoelectric generators facilitates conformal contact with arbitrary-shaped heat sources, which offers an opportunity to realize self-powered wearable applications. However, existing wearable thermoelectric devices inevitably exhibit reduced thermoelectric conversion efficiency due to the parasitic heat loss in high-thermal-impedance polymer substrates and poor thermal contact arising from rigid interconnects. Here, we propose compliant thermoelectric generators with intrinsically stretchable interconnects and soft heat conductors that achieve high thermoelectric performance and unprecedented conformability simultaneously. The silver-nanowire-based soft electrodes interconnect bismuth-telluride-based thermoelectric legs, effectively absorbing strain energy, which allows our thermoelectric generators to conform perfectly to curved surfaces. Metal particles magnetically self-assembled in elastomeric substrates form soft heat conductors that significantly enhance the heat transfer to the thermoelectric legs, thereby maximizing energy conversion efficiency on three-dimensional heat sources. Moreover, automated additive manufacturing paves the way for realizing self-powered wearable applications comprising hundreds of thermoelectric legs with high customizability under ambient conditions.

scholarly journals Polyol Silver Nanowire Synthesis and the Outlook for a Green Process

2020 ◽  
Vol 2020 ◽  
pp. 1-25 ◽  
Author(s):  
Shohreh Hemmati ◽  
Michael T. Harris ◽  
Dale P. Barkey
Keyword(s):  
Silver Nanowires ◽  
Synthesis Method ◽  
Polyol Process ◽  
Silver Nanowire ◽  
Polyol Synthesis ◽  
High Yield ◽  
Silver Nanostructures ◽  
Wearable Electronics ◽  
Aspect Ratios ◽  
Size And Morphology

Silver nanowires (AgNWs) have a broad range of applications including nanoelectronics, energy conversion, health care, solar cells, touch screens, sensors and biosensors, wearable electronics, and drug delivery systems. As their characteristics depend strongly on their size and morphology, it is essential to find the optimal and most cost-effective synthesis method with precise control over the size and morphology of the wires. Various methods for AgNW synthesis have been reported along with process optimization and novel techniques to increase the yield and aspect ratios of synthesized AgNWs. The most promising processes for synthesis of AgNWs are wet chemical techniques, in which the polyol process is low cost and simple and provides high yield compared to other chemical methods. Reaction mechanism is one of the most important factors in strategies to control the process. Our purpose here is to provide an overview on the main findings regarding synthesis, preparation, and characterization of AgNWs. Recent efforts in the polyol synthesis of AgNWs are summarized with respect to product morphology and size, reaction conditions, and characterization techniques. The effect of essential factors such as reagent concentration and preparation, temperature, and reaction atmosphere that control the size, morphology, and yield of synthesized AgNWs is reviewed. Moreover, a review on the novel modified polyol process and reactor design such as continuous millifluidic and flow reactors to increase the yield of synthesized AgNWs on large scales is provided. The most recent proposed growth mechanisms and kinetics behind the polyol process are addressed. Finally, comparatively few available studies in green and sustainable development of 1D silver nanostructures through the application of natural products with inherent growth termination, stabilization, and capping characteristics are reviewed to provide an avenue to natural synthesis pathways to AgNWs. Future directions in both chemical and green synthesis approaches of AgNWs are addressed.

scholarly journals Intrinsically Stretchable Organic-Tribotronic-Transistor for Tactile Sensing

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Junqing Zhao ◽  
Tianzhao Bu ◽  
Xiaohan Zhang ◽  
Yaokun Pang ◽  
Wenjian Li ◽  
...  
Keyword(s):  
Tactile Sensor ◽  
Interactive Systems ◽  
Silver Nanowire ◽  
Human Hand ◽  
Stretchable Electronics ◽  
Wearable Electronics ◽  
Human Machine Interaction ◽  
Signal Perception ◽  
Source Current ◽  
Great Output

Stretchable electronics are of great significance for the development of the next-generation smart interactive systems. Here, we propose an intrinsically stretchable organic tribotronic transistor (SOTT) without a top gate electrode, which is composed of a stretchable substrate, silver nanowire electrodes, semiconductor blends, and a nonpolar elastomer dielectric. The drain-source current of the SOTT can be modulated by external contact electrification with the dielectric layer. Under 0-50% stretching both parallel and perpendicular to the channel directions, the SOTT retains great output performance. After being stretched to 50% for thousands of cycles, the SOTT can survive with excellent stability. Moreover, the SOTT can be conformably attached to the human hand, which can be used for tactile signal perception in human-machine interaction and for controlling smart home devices and robots. This work has realized a stretchable tribotronic transistor as the tactile sensor for smart interaction, which has extended the application of tribotronics in the human-machine interface, wearable electronics, and robotics.

SEMICONDUCTOR THIN FILMS AND THIN FILM DEVICES FOR ELECTROTEXTILES

2002 ◽  
Vol 12 (02) ◽  
pp. 371-390 ◽  
Author(s):  
MICHAEL S. SHUR ◽  
SERGEY L. RUMYANTSEV ◽  
REMIS GASKA
Keyword(s):  
Thin Film ◽  
Energy Gap ◽  
Copper Wire ◽  
Photovoltaic Effect ◽  
Metal Films ◽  
Localized States ◽  
Flexible Substrates ◽  
Wearable Electronics ◽  
Large Area ◽  
Cds Films

We discuss the evolution from wearable electronics and conductive textiles to electrotextiles with embedded semiconducting films and semiconductor devices and review different semiconductor technologies competing for applications in electrotextiles. We also report on fabrication, characterization, and properties of nanocrystalline semiconductor and metal films and thin-film device structures chemically deposited on fibers, cloth, and large area flexible substrates at low temperatures (close to room temperature). Our approach is based on a new process of depositing polycrystalline CdSe (1.75 eV), CdS (2.4 eV), PbS (0.4 eV), PbSe (0.24 eV) and CuxS (semiconductor/metal) films on flexible substrates from the water solutions of complex-salt compounds. We have covered areas up to 8 × 10 inches but the process can be scaled up. The film properties are strongly affected by processing. We fabricated a lateral solar cell with alternating Cu2-xS and nickel contact stripes deposited on top of a view foil. These sets of contacts represented "ohmic" and "non-ohmic" contacts, respectively. Then CdS films of approximately 0.5 μm thick were deposited on top. We also fabricated a "sandwich" type photovoltaic cell, where the CdS film was sandwiched between an In2O3 layer deposited on a view foil and a Cu2-xS layer deposited on top. Both structures exhibited transient response under light, with the characteristic response time decreasing with the illumination wavelength. This is consistent with having deeper localized states in the energy gap determining the transients for shorter wavelength radiation. (Slow transients related to trapping effects are typical for polycrystalline CdS materials.) We also report on the photovoltaic effect in CdS/CuS films deposited on trylene threads and on a field effect in these films deposited on a flexible copper wire. CdS films deposited on viewfoils exhibit unique behavior under stress and UV radiation exposure with reproducible resistance changes of several orders of magnitude with bending up to 10 mm curvature. Our results clearly demonstrate the feasibility of using this technology for photovoltaic and microelectronics applications for electrotextiles and wearable electronics applications.

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