Aligning Ag Nanowires by a Facile Bioinspired Directional Liquid Transfer: Toward Anisotropic Flexible Conductive Electrodes

Meng, Lili; Bian, Ruixin; Guo, Cheng; Xu, Bojie; Liu, Huan; Jiang, Lei

doi:10.1002/adma.201706938

Cited by 93 publications

(74 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[42] Therefore, the loading quantity could be calculated via dividing the total doping amount by substrate size. Then the different blended solutions were sequentially brushed on a patterned stencil mask placed on a clean pre-stretched PDMS substrate (5 mL solution, substrate size of 100 cm 2 , under 10% strain), using the reported directional liquidtransfer technique.…”

Section: Methodsmentioning

confidence: 99%

Skin‐Friendly Electronics for Acquiring Human Physiological Signatures

2019

View full text Add to dashboard Cite

exercise that may last for hours or even days. [1,6,7] Much effort has been invested to increase adhesion by improving/optimizing the mechanical properties, thickness, and structural design of the device substrate. [8,9] However, just like many skin adhesives and transdermal patches, the strong adhesive design in many skin-mounted devices usually results in difficult detachment after their use, causing skin irritation, pain and even secondary damage to the wound when used, for example, as a wound healing dressing. [10] Strategies to design epidermal devices with strong adhesion and easy (preferably triggered, ondemand) detachment properties have yet to be developed. Moreover, technologies for safe disposal of epidermal electronics (most of which eventually end up in electronic wastes) have been rarely explored. Furthermore, harsh and fluctuating conditions during prolonged outdoor activities may affect the accuracy and reliability of those skin-mounted devices. [3,4] Most designs neglect these important aspects of epidermal devices, hindering them from real-world applications.Here we report a set of degradable epidermal electronics consisting of both physical and biochemical sensors that can monitor multidimensional physiological parameters such as electrocardiograms (ECG), electrooculography (EOG), and electromyography (EMG) as well as temperature, strain, humidity, and bacterial infection. Using an artificial neural network (ANN), important physiology signatures can be detected that are nearly unaffected by individual differences. Moreover, while Epidermal sensing devices offer great potential for real-time health and fitness monitoring via continuous characterization of the skin for vital morphological, physiological, and metabolic parameters. However, peeling them off can be difficult and sometimes painful especially when these skinmounted devices are applied on sensitive or wounded regions of skin due to their strong adhesion. A set of biocompatible and water-decomposable "skinfriendly" epidermal electronic devices fabricated on flexible, stretchable, and degradable protein-based substrates are reported. Strong adhesion and easy detachment are achieved concurrently through an environmentally benign, plasticized protein platform offering engineered mechanical properties and water-triggered, on-demand decomposition lifetime (transiency). Human experiments show that multidimensional physiological signals can be measured using these innovative epidermal devices consisting of electroand biochemical sensing modules and analyzed for important physiological signatures using an artificial neural network. The advances provide unique, versatile capabilities and broader applications for user-and environmentally friendly epidermal devices.Epidermal electronics, an emerging class of wearable electronic devices that are mounted on the human skin with conformal contact for direct skin-sensor interactions, are especially appealing for the "Internet of Things" and next-generation wearable medical applications. [1][2][3][4][5]...

show abstract

Section: Methodsmentioning

confidence: 99%

Skin‐Friendly Electronics for Acquiring Human Physiological Signatures

2019

View full text Add to dashboard Cite

show abstract

“…Using Janus structural materials to separate different materials can effectively reduce its adverse effects. With the development of science and technology, aeolotropic electrically conductive materials [15,16] have become one of the research hotspots due to their unique conductive properties. Aeolotropic conductive films (ACFs) [17][18][19][20] with exceptive structure have important applications in some electronic components [21], photoelectric switch [22], sensors [23] and other fields.…”

Section: Introductionmentioning

confidence: 99%

2D double aeolotropic conductive Janus pellicle with multi-functionality then derived 3D dual-wall Janus-type tube

Qi¹,

Do²,

Xie³

et al. 2020

Express Polym. Lett.

View full text Add to dashboard Cite

bilayer Janus pellicle (denoted as BJP) of concurrent double aeolotropic electrical conduction, superparamagnetism and luminescence is designed and constructed via electrospinning by using one-dimensional (1D) nanofibers and Janus nanoribbons as constructive units. The BJP comprises top-down two layers tightly bonded together. The top layer is a left-right structured Janus film which consists of Janus nanoribbons array as left and right side, and further, arrangement orientations of Janus nanoribbons in the two sides are perpendicular, leading to double aeolotropic conduction, and the conduction ratio reaches 10 8 times. The down layer is a non-array luminescent film made of nanofibers. Under the excitation by 291 and 294 nm light, red luminescence of the left side of the top layer and green luminescence of down layer in BJP are respectively achieved. The maximum saturation magnetization of the top layer can reach 21.45 (emu/g). By rolling the 2D BJP into the tube respectively with the ways of rolling from left to right or from up to down, three-dimensional (3D) dual-wall Janus-type tube with the Janus-type tube as outer or inner and the homogeneous tube as inner or outer is obtained.

show abstract

“…Due to their good conductivity and flexible fabrication properties, many kinds of conductive polymers have been widely integrated in flexible electronic systems, such as, poly (3, 4‐ethylenedioxythiophene): poly (4‐styrenesulfonate) (PEDOT: PSS), with a PEDOT unit for conductivity and a PSS unit for dispersion in H 2 O . This hydrogel has attracted much attention from researchers for its stable conductivity and relatively high conductivity compared to other conducting polymers . However, the conductivity of PEDOT:PSS is still relatively low when it is applied in the electronic systems.…”

mentioning

confidence: 99%

Conductive Polymer Hydrogel Microfibers from Multiflow Microfluidics

Guo

Wang

et al. 2019

Small

View full text Add to dashboard Cite

Conductive hydrogels are receiving increasing attention for their utility in electronic area applications requiring flexible conductors. Here, it is presented novel conductive hydrogel microfibers with alginate shells and poly (3, 4‐ethylenedioxythiophene): poly (4‐styrenesulfonate) (PEDOT: PSS) cores fabricated using a multiflow capillary microfluidic spinning approach. Based on multiflow microfluidics, alginate shells are formed immediately from the fast gelation reaction between sodium alginate (Na‐Alg) and sheath laminar calcium chloride flows, while PEDOT: PSS cores are solidified slowly in the hollow alginate hydrogel shell microreactors after their precursor solutions are injected in situ as the center fluids. The resultant PEDOT: PSS‐containing microfibers are with features of designed morphology and highly controllable package, because material compositions or the sizes of their shell hydrogels can be tailored by using different concentrations or flow rates of pregel solutions. Moreover, the practical values of these microfibers in stretch sensitivity and bending stability are explored based on various electrical characterizations of the compound materials. Thus, it is believed that these microfluidic spinning PEDOT: PSS conductive microfibers will find important utility in electronic applications requiring flexible electronic systems.

show abstract

Aligning Ag Nanowires by a Facile Bioinspired Directional Liquid Transfer: Toward Anisotropic Flexible Conductive Electrodes

Cited by 93 publications

References 55 publications

Skin‐Friendly Electronics for Acquiring Human Physiological Signatures

Skin‐Friendly Electronics for Acquiring Human Physiological Signatures

2D double aeolotropic conductive Janus pellicle with multi-functionality then derived 3D dual-wall Janus-type tube

Conductive Polymer Hydrogel Microfibers from Multiflow Microfluidics

Contact Info

Product

Resources

About