Highly stable copper wire/alumina/polyimide composite films for stretchable and transparent heaters

Li, Peng; Ma, Jiangang; Xu, Haiyang; Xue, Xiaodan; Liu, Yichun

doi:10.1039/c5tc04276c

Cited by 68 publications

(66 citation statements)

References 57 publications

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“…[98,99] For practical application, the manufacturing process of wearable sensors should be cost-effective, scalable, capable of large area, and easy production. Park et al [101] have dip coated a fabric yarn to CuZr alloy (metallic glass)/PDMS Co-sputtering [12] Silver nanowire (Ag NW)/PDMS Vacuum filtration transfer [18] Silicone prepolymer/Al Spin coating [19] Ag-NW/styrene-butadiene-styrene (SBS) Solution casting [44] Ag-NW/cotton Dip coating [49] Silica NP/PDMS/cellulose acetate/IL/silver/cotton Coating/thermal evaporation [50] Aligned boron nitride (BN)/polyvinyl alcohol (PVA) 3D printing [51] PEDOT/cloth Coating/vapor phase polymerization [52] Nylon-6 nanofiber/Ag/nanoporous polyethylene (nano-PE) Electrospinning/electroless plating [53] Graphene/polyisobutylene (PIB)/PDMS Chemical vapor deposition/spin coating [54] Copper nanowire (Cu-NW)/poly (methyl methacrylate) (PMMA) Spray coating/spin coating [55] Cu wire/alumina/polyimide/PDMS Atomic layer deposition (ALD)/spin coating [178] Actuator/muscle MWCNT/carbon nanofiber/PEDOT:PSS Electrospinning/drop casting [6] Graphene oxide/vapor grown carbon fiber (VGCF)/IL Solution casting [8] PEDOT:PSS Wet spinning/ chemical treatment [17] Bacterial cellulose (BC)/IL/graphene Solution casting [23] PEDOT:PSS/VGCF/IL Solution casting [33] IL/polyurethane/PEDOT:PSS Solution casting [34] BC/IL/ionic polymer Dip coating [59] PEDOT-polystyrene sulfonic acid (PEDOT:PSS)/IL/BC Solution casting [179] Poly(ionic liquid)(PIL)/polyacrylic acid/paper Dip coating [65] Drug delivery Mesoporous silica nanoparticle Transfer printing [21] PDMS Soft lithography [61] www.advmat.de www.advancedsciencenews.com form a highly stretchable strain sensor that can stretch up to 150% along its axis while Lipomi et al [102] spray coated CNT to form a stretchable strain sensor. [100][101][102]…”

Section: Materials Structures and Methods In Wearable Sensorsmentioning

confidence: 99%

Significance of Nanomaterials in Wearables: A Review on Wearable Actuators and Sensors

et al. 2018

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Powered by market hype, trends among youth, and enormous funds, wearable technology has propelled itself as one of the most discussed topics in the field during past few years. A number of different companies representing all throughout the world have already entered into the market with hundreds of different products like smart watches, fitness trackers, smart garments, and even different smart medical attachments.Together with the evolution of digital health care, the wearable electronics field has evolved rapidly during the past few years and is expected to be expanded even further within the first few years of the next decade. As the next stage of wearables is predicted to move toward integrated wearables, nanomaterials and nanocomposites are in the spotlight of the search for novel concepts for integration. In addition, the conversion of current devices and attachment-based wearables into integrated technology may involve a significant size reduction while retaining their functional capabilities. Nanomaterialbased wearable sensors have already marked their presence with a significant distinction while nanomaterial-based wearable actuators are still at their embryonic stage. This review looks into the contribution of nanomaterials and nanocomposites to wearable technology with a focus on wearable sensors and actuators.

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Section: Materials Structures and Methods In Wearable Sensorsmentioning

confidence: 99%

Significance of Nanomaterials in Wearables: A Review on Wearable Actuators and Sensors

et al. 2018

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“…The slope of the best-fit straight line in Figure 3f represents the heating efficiency (that is, thermal resistance) of the heater. 9,39 The heater that had a lower R s value had a steeper slope, implying better heating efficiency. Therefore, the remarkably low R s value of the AgNF heater was advantageous in reducing its thermal resistance for the efficient transduction of electrical energy into heat with lower power consumption.…”

Section: Thermal Characteristics Of a Agnf Heatermentioning

confidence: 99%

Rapid production of large-area, transparent and stretchable electrodes using metal nanofibers as wirelessly operated wearable heaters

et al. 2017

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A rapidly growing interest in wearable electronics has led to the development of stretchable and transparent heating films that can replace the conventional brittle and opaque heaters. Herein, we describe the rapid production of large-area, stretchable and transparent electrodes using electrospun ultra-long metal nanofibers (mNFs) and demonstrate their potential use as wirelessly operated wearable heaters. These mNF networks provide excellent optoelectronic properties (sheet resistance of~1.3 Ω per sq with an optical transmittance of~90%) and mechanical reliability (90% stretchability). The optoelectronic properties can be controlled by adjusting the area fraction of the mNF networks, which also enables the modulation of the power consumption of the heater. For example, the low sheet resistance of the heater presents an outstanding power efficiency of 0.65 W cm − 2 (with the temperature reaching 250°C at a low DC voltage of 4.5 V), which is~10 times better than the properties of conventional indium tin oxide-based heaters. Furthermore, we demonstrate the wireless fine control of the temperature of the heating film using Bluetooth smart devices, which suggests substantial promise for the application of this heating film in next-generation wearable electronics.

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“…The obtained STC exhibited excellent electrical conductivity as well as high chemical and electrochemical stabilities compared to that prepared with pristine AgNWs. Li et al reported an STC comprising of Al 2 O 3 /CuNWs/polyimide film using atomic layer deposition. The oxide layer was deposited to ensure the unprecedented stability against harsh environment.…”

Section: Structure‐dependent Properties Of Stcsmentioning

confidence: 99%

Stretchable Transparent Conductors: from Micro/Macromechanics to Applications

Chen

Fang

et al. 2019

Advanced Materials

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electronics include stretchable solar cells, [2] stretchable organic light emitting diodes (OLEDs), [3] stretchable field-effect transistors (FETs), [4] stretchable supercapacitors, [5] stretchable actuators [6] and heaters, [7] etc. The emerging of stretchable electronics has foreseen the revolution of future electronics, ranging from design, shape and functions to installation, applications and even user experience. For example, stretchable optoelectronics, such as solar cells and OLEDs, are conformable, rollable and foldable. They can be installed on irregularly shaped roof or side walls of buildings, vehicles and other public utilities. Similarly, stretchable sensors used as e-skin can not only fit motions at joints of human or robots with tensile strain of large than 100%, [1e] but also sense signals related to strain, temperature, humidity and even blood pressure. [8] Moreover, the integration of different kinds of stretchable electronics may exhibit diversity in functions. [9] For instance, wearable devices of stretchable energy harvesting and storage electronics combining with stretchable sensors and heaters may sense the biomedical signal and keep the patient warm with the power collected from solar/friction energy. More potential applications of stretchable electronics in different fields, not restricted to the above examples, will be seen in the future.Stretchable transparent conductors (STCs) are fundamental components in stretchable electronics. They generally consist of a stretchable transparent polymeric substrate and a layer of conducting elements on or embedded in the substrate. The substrates involve poly(dimethyl siloxane) (PDMS) and polyacrylate-based elastomers [10] while the conducting elements include conducting polymers, [11] metal nanowires, [12] carbon nanotubes (CNTs), [13] graphene [14] or their hybrids. The substrates generally show transmittance of higher than 90% [15] and can be stretched to a strain of larger than 100%, e.g., PDMS and VHB (a typical acrylic elastomer) could exhibit a fracture tensile strain up to ≈160% [16] and several hundred percentages, [6a,17] respectively. STCs could be considered as the combination of transparent conductors and stretchable conductors; [18] they can simultaneously show stable conductivity and transparency upon deformation, including bending, folding, twisting, crumpling, stretching, etc. The transparency of STCs is attributed to the low attenuation of visible light by the substrate and the conducting layer. The conductivity is obtained due to the continuity of conducting layer either via uniform film or the connection of Stretchable transparent conductors (STCs), generally consisting of conducting networks and stretchable transparent elastomers, can maintain stable conductivity and transparency even at large tensile strain, beyond the reach of rigid/flexible transparent conductors. They are essential components in stretchable/wearable electronics for using on irregular 3D conformable surfaces and have attracted tremendous attention ...

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Highly stable copper wire/alumina/polyimide composite films for stretchable and transparent heaters

Abstract: Thermal, electrical and mechanical stabilities of a Cu wire-based transparent heater are improved by coating alumina and polymide films.

Cited by 68 publications

References 57 publications

Significance of Nanomaterials in Wearables: A Review on Wearable Actuators and Sensors

Significance of Nanomaterials in Wearables: A Review on Wearable Actuators and Sensors

Rapid production of large-area, transparent and stretchable electrodes using metal nanofibers as wirelessly operated wearable heaters

Stretchable Transparent Conductors: from Micro/Macromechanics to Applications

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