Solution‐Processed Large‐Area Nanocrystal Arrays of Metal–Organic Frameworks as Wearable, Ultrasensitive, Electronic Skin for Health Monitoring

Fu, Xiaolong; Dong, Huanli; Zhen, Yonggang; Hu, Wenping

doi:10.1002/smll.201402890

Cited by 77 publications

(63 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the micro-structured e-skin can attach onto the wrist and detect the wrist pulse caused by blood pressure (Fig.7f). As shown in Fig.7g, three typical peaks assigned to early systolic peak pressure (P 1 ), late systolic peak pressure (P 2 ) and diastolic pulse waveform (P 3 ) are observed, 5,50 demonstrating the eskin owns low detection limit and may be a robust candidate in physiological diagnosis. By tailoring the micro-structured PDMS conductor with size of 0.5 cm × 0.5 cm and attaching the smaller size e-skins onto PET film (thickness: 100 μm), a piezoresistive pressure sensor array with 3 × 3 pixels is fabricated.…”

Section: Performance Of the Flexible E-skinmentioning

confidence: 95%

Cu–Ag core–shell nanowires for electronic skin with a petal molded microstructure

et al. 2015

View full text Add to dashboard Cite

Flexible electronic skin (e-skin) have been widely researched due to their potential applications in wearable electronics, robotic systems, biomedicines, et al. For realization of lower cost of the e-skin, copper nanowires (CuNWs) are often served as conductive fillers since their high conductivity and flexibility. However, CuNWs are very sensitive to oxygen that greatly hinders their developments. To solve this issue, a facile galvanic replacement reaction without any heating, stirring or dispersant was performed to coat a thin layer of silver (20 nm) on the surface of CuNWs and Cu-Ag core-shell nanowires (Cu-Ag NWs) with excellent oxidation resistance were obtained and served as conductive fillers for e-skin. To further increase the sensitivity and reduce the response time and detection limit, micro-structure of the surface of rose petal was replicated and introduced onto 2D polydimethylsiloxane (PDMS) surface. The bio-inspired piezoresistive e-skin demonstrates high sensitivity (1.35 kPa -1 ), very low detection limit (< 2 Pa), very low response time and relaxation time (36 ms and 30 ms) and outstanding working stability (more than 5000 cycles). The high performance e-skin has extensive applications in voice recognition, wrist pulses monitoring and detection of spatial distribution of pressure.−1 ), fast response (<500 ms) and low detection limit (20 mg). 29 Wang, et al. replicated the surface of silk and constructed a piezoresistive e-skin, which can be used as voice The defining feature of our design is that the length of the CuNWs should not larger than 20 μm. Therefore, a lower EDA concentration (95 mM) and shorter reaction time (<1.0 h) was performed to synthesis shorter CuNWs. Fig.1a and b show the

show abstract

Section: Performance Of the Flexible E-skinmentioning

confidence: 95%

Cu–Ag core–shell nanowires for electronic skin with a petal molded microstructure

et al. 2015

View full text Add to dashboard Cite

show abstract

“…However, complicated preparation procedures involving photolithographic equipment and high-resolution templates were expensive and hard to reproduce in large area www.advelectronicmat.de production, which significantly limited the practical use of flexible sensing devices. [101] Until now, it remains a challenge to achieve highly sensitive and large area sensor arrays on easyprocessing active materials with facile fabrication method and simple device structures. To address this issue, our group reported that through facile and cost-effective solution process, ultrasensitive electronic skins based on copper 7,7,8,8-tetracyano-p-quinodimethane (CuTCNQ) nanocrystal arrays with large area could be fabricated.…”

Section: How To Improve the Performance Of Sensors Through Nanoassembmentioning

confidence: 99%

“…To address this issue, our group reported that through facile and cost-effective solution process, ultrasensitive electronic skins based on copper 7,7,8,8-tetracyano-p-quinodimethane (CuTCNQ) nanocrystal arrays with large area could be fabricated. [101] CuTCNQ nanowire arrays were fabricated as described in Figure 5A. First, 200 nm copper thin film was thermally evaporated onto precut 25 µm thick polyimide (PI) flexible substrate.…”

Section: How To Improve the Performance Of Sensors Through Nanoassembmentioning

confidence: 99%

Assembly of π‐Conjugated Nanosystems for Electronic Sensing Devices

Zhang

Wang

Cheng

et al. 2017

Adv Elect Materials

Self Cite

View full text Add to dashboard Cite

Sensors have attracted particular attention as analytical devices because of their importance in health and security. The ability to obtain unique functions using molecular design have rapidly advanced the use of organic optoelectronic materials of π‐conjugated compounds in electronic sensing devices. A brief introduction to sensors, focusing on organic micro‐ or nanoassemblies created using state‐of‐the‐art protocols for assembly and their recent development for high‐performance electronic sensing devices, is presented.

show abstract

“…[3] In particular,f unctionalp olymers with high strength,s tretchability, self-healing, and conductivity have been fabricated for E-skin applications. [4] To furtherd evelopE -skin with desired mechanical properties and multifunctionalities, active materials, such as metal nanoparticles, [3a] graphene oxide, [5] carbonn anotubes, [6] organic microspheres, [7] and metal-organic frameworks, [8] have been incorporatedi nto the polymers for E-skin fabrication.F or example,B ao and co-workers successfully fabricated conductive micronickel-particle-reinforced electronic sensor skin. [3a] Humanp rotein-based hybrid hydrogels incorporatedw ith graphene oxide nanoparticles wered eveloped by Wang et al, through the incorporation of GO nanoparticles to improve both toughness and elasticity of the engineered hydrogels.…”

Section: Introductionmentioning

confidence: 99%

A Conductive Self‐Healing Double Network Hydrogel with Toughness and Force Sensitivity

Liu

Hussain

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

Mechanically tough and electrically conductive self-healing hydrogels may have broad applications in wearable electronics, health-monitoring systems, and smart robotics in the following years. Herein, a new design strategy is proposed to synthesize a dual physical cross-linked polyethylene glycol/poly(acrylic acid) (PEG/PAA) double network hydrogel, consisting of ferric ion cross-linked linear chain extensions of PEG (2,6-pyridinedicarbonyl moieties incorporated into the PEG backbone, PEG-H pdca) as the first physical network and a PAA-Fe gel as the second physical network. Metal-ion coordination and the double network structure enable the double network hydrogel to withstand up to 0.4 MPa tensile stress and 1560 % elongation at breakage; the healing efficiency reaches 96.8 % in 12 h. In addition, due to dynamic ion transfer in the network, the resulting hydrogels exhibit controllable conductivity (0.0026-0.0061 S cm ) and stretching sensitivity. These functional self-healing hydrogels have potential applications in electronic skin. It is envisioned that this strategy can also be employed to prepare other high-performance, multifunctional polymers.

show abstract

Solution‐Processed Large‐Area Nanocrystal Arrays of Metal–Organic Frameworks as Wearable, Ultrasensitive, Electronic Skin for Health Monitoring

Cited by 77 publications

References 40 publications

Cu–Ag core–shell nanowires for electronic skin with a petal molded microstructure

Cu–Ag core–shell nanowires for electronic skin with a petal molded microstructure

Assembly of π‐Conjugated Nanosystems for Electronic Sensing Devices

A Conductive Self‐Healing Double Network Hydrogel with Toughness and Force Sensitivity

Contact Info

Product

Resources

About