Flexible Electronics and Healthcare Applications

Wang, Zixian; Sun, Lin; Ni, Youxuan; Liu, Lu; Xu, Wentao

doi:10.3389/fnano.2021.625989

Cited by 26 publications

(19 citation statements)

References 117 publications

(122 reference statements)

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“…), which is achieved using a vacuum pump (4). The tested nanocomposite sample (11) is placed in the cryostat head (3) and cooled in a closed circuit by means of a helium compressor (5). Temperature detection and control are carried out by a system consisting of a silicon sensor (8), a temperature controller (7), and a connected heater mounted in the cryostat head.…”

Section: Methodsmentioning

confidence: 99%

“…The impedance meters have the ability to measure four of the following 14 electrical parameters: Z-impedance, Y-admittance, ϕ-phase shift angle, tg δ-loss factor, Q-Q factor, C S -static capacitance in series equivalent circuit, C P -static capacitance in parallel equivalent circuit, L S -inductance in series equivalent circuit, L P -inductance in parallel equivalent circuit, R S -effective resistance in series equivalent circuit, G-conductance, R P -effective resistance in parallel equivalent circuit, X-reactance, B-susceptance. The amplitude of the voltage applied to the test sample was U = 0.4 V. The impedance meter and the temperature controller are connected to a computer (11), where the measurement results are saved as xls files.…”

Section: Methodsmentioning

confidence: 99%

“…Despite the progress in this area, new challenges arise due to the increasing application of implantable systems with high flexibility and biocompatibility [10]. Cardiac patches, electrodes, brain and muscle stimulators, and neural guide conduits require the application of conductive biocompatible polymer membrane with satisfactory electronic properties [11]. Conductive polymers and membranes with conductive materials, including graphene and carbon nanotubes, are widely used in biomedical device development [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of AC Electrical Properties of MXene-PCL Nanocomposites for Application in Small and Medium Power Generation

et al. 2021

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The paper examined Ti3C2Tx MXene (T—OH, Cl or F), which is prepared by etching a layered ternary carbide Ti3AlC2 (312 MAX-phase) precursor and deposited on a polycaprolactone (PCL) electrospun membrane (MXene-PCL nanocomposite). X-ray Diffraction analysis (XRD) and Scanning Electron Microscopy (SEM) indicates that the obtained material is pure Ti3C2 MXene. SEM of the PCL-MXene composite demonstrate random Ti3C2 distribution over the nanoporous membrane. Results of capacitance, inductance, and phase shift angle studies of the MXene-PCL nanocomposite are presented. It was found that the frequency dependence of the capacitance exhibited a clear sharp minima in the frequency range of 50 Hz to over 104 Hz. The frequency dependence of the inductance shows sharp maxima, the position of which exactly coincides with the position of the minima for the capacitance, which indicates the occurrence of parallel resonances. Current conduction occurs by electron tunneling between nanoparticles. In the frequency range from about 104 Hz to about 105 Hz, there is a broad minimum on the inductance relationship. The position of this minimum coincides exactly with the position of the maximum of the phase shift angle—its amplitude is close to 90°. The real value of the inductance of the nanocomposite layer was determined to be about 1 H. It was found that the average value of the distance over which the electron tunnels was determined with some approximation to be about 5.7 nm and the expected value of the relaxation time to be τM ≈ 3 × 10−5 s.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of AC Electrical Properties of MXene-PCL Nanocomposites for Application in Small and Medium Power Generation

et al. 2021

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“…3,7 Various considerations must be addressed for flexible electronics to be applicable under extreme conditions. 2 There are three distinct but important aspects of hightemperature FHE device that must be improved upon for more efficient use: The conductor (the metal of choice), 3,4,7−11 advanced substrate material (flexible thin ceramics), 4,8,12 and system passivation with thermal management (further thermal and reactive protection from the environment). [4][5][6]13 The metal used as the conductor should ideally have high conductivity, high resistance to environmental conditions, and be reliable over a long period of time.…”

mentioning

confidence: 99%

“…[4][5][6]13 The metal used as the conductor should ideally have high conductivity, high resistance to environmental conditions, and be reliable over a long period of time. 2 Precious metals, such as gold, 14 platinum, 15 and silver, 1,16 show great promise due to their inherent physicochemical properties; however, the low abundance and high cost of these metals prove to be limiting factors, necessitating the need for other materials.…”

mentioning

confidence: 99%

Ultrahigh Temperature Copper-Ceramic Flexible Hybrid Electronics

Sheng

Khuje

et al. 2021

Nano Lett.

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Advanced high-temperature materials, metals and ceramics, have been widely sought after for printed flexible electronics under extreme conditions. However, the thermal stability and electronic performance of these materials generally diminish under extreme environments. Additionally, printable electronics typically utilize nanoscale materials, which further exacerbate the problems with oxidation and corrosion at those extreme conditions. Here we report superior thermal and electronic stability of printed copper-flexible ceramic electronics by means of integral hybridization and passivation strategies. High electric conductivity (5.6 MS/m) and thermal stability above 400 °C are achieved in the printed graphene-passivated copper platelet features, while thermal management and stability above 1000 °C of printed electronics can be achieved by using either ultrathin alumina or flexible alumina aerogel sheets. The findings shown here provide a pathway toward printed, extreme electronic applications for harsh service conditions.

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Breathable, Flexible, Transparent, Hydrophobic, and Biotic Sustainable Electrodes for Heating and Biopotential Signal Measurement Applications

et al. 2022

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Flexible electronics is an interdisciplinary research area that combines a variety of research fields, such as chemistry, physics, material science, electronic and electrical engineering, mechanical engineering, computing science, and application-related fields such as biomedical engineering. [1] The outcomes are compliant devices that can maintain mechanical integrity and electrical functionality while they are lightweight and conformable over uneven surfaces. [2,3] Maintaining the mechanical and electrical integrity of the device during the deformation is the main challenge that needs to be addressed. [2] In response to the challenges, the development of novel flexible materials and special mechanical designs are key remedies in designing the substrates and active components used in flexible electronics. There are commonly used flexible materials as substrate and conductive layers: either organic [4,5] (e.g., small molecules, polymers) or inorganic [6,7] (e.g., metal nanowires, graphene, carbon nanotube). Likewise, different strategies in the structural design of stretchable systems are commonly used, such as in-plane/out-of-plane wavy structures, origami and kirigami structures as well as the islandbridge approach where rigid functional units are miniaturized and linked together by deformable interconnections. [8][9][10] Among various kinds of applications, healthcare devices, including skin patches, smart clothing, and other devices that interface with the skin or other tissues are increasing their importance in remote patient monitoring and treatment. [11] Learning from nature provides a tremendous number of lessons for scientists to develop new materials and designs. [12] Therefore, bioinspired materials with special functionalities have gained a lot of attention in engineering research. Scientists are inspired by the unique microstructures of these functional biological materials that can offer new features for various applications. [13,14] Among the number of biostructure patterns, fractal-like structures are available in nature. Examples of fractal-like structures in nature are snowflakes and leaf skeletons. Fractal-like designs which offer high surface area, improved stability, and efficient transport of ions in the materials have been

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Flexible Electronics and Healthcare Applications

Cited by 26 publications

References 117 publications

Investigation of AC Electrical Properties of MXene-PCL Nanocomposites for Application in Small and Medium Power Generation

Investigation of AC Electrical Properties of MXene-PCL Nanocomposites for Application in Small and Medium Power Generation

Ultrahigh Temperature Copper-Ceramic Flexible Hybrid Electronics

Breathable, Flexible, Transparent, Hydrophobic, and Biotic Sustainable Electrodes for Heating and Biopotential Signal Measurement Applications

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