scholarly journals Conductive Materials: A Super‐Stretchable Liquid Metal Foamed Elastomer for Tunable Control of Electromagnetic Waves and Thermal Transport (Adv. Sci. 12/2020)

2020 ◽  
Vol 7 (12) ◽  
pp. 2070064
Author(s):  
Dehai Yu ◽  
Yue Liao ◽  
Yingchao Song ◽  
Shilong Wang ◽  
Haoyu Wan ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Thermal Transport ◽  
Electromagnetic Waves ◽  
Conductive Materials

scholarly journals A Super‐Stretchable Liquid Metal Foamed Elastomer for Tunable Control of Electromagnetic Waves and Thermal Transport

2020 ◽  
Vol 7 (12) ◽  
pp. 2000177 ◽  
Author(s):  
Dehai Yu ◽  
Yue Liao ◽  
Yingchao Song ◽  
Shilong Wang ◽  
Haoyu Wan ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Thermal Transport ◽  
Electromagnetic Waves

scholarly journals Nano liquid metal for the preparation of a thermally conductive and electrically insulating material with high stability

RSC Advances ◽  
2018 ◽  
Vol 8 (29) ◽  
pp. 16232-16242 ◽  
Author(s):  
P. Fan ◽  
Z. Sun ◽  
Y. Wang ◽  
H. Chang ◽  
P. Zhang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Liquid Metal ◽  
High Stability ◽  
Insulating Material ◽  
Conductive Materials ◽  
Thermally Conductive ◽  
Base Polymer

Compared to liquid metal (LM) microdroplets based thermally conductive materials (micro-LM-THEMs), nano LM-THEMs (nLM-THEMs) presents a more stable electric insulating property even upon stress, achieving ~50-fold thermal conductivity over base polymer.

Pressure-Activated Thermal Transport via Oxide Shell Rupture in Liquid Metal Capsule Beds

2019 ◽  
Vol 12 (2) ◽  
pp. 2625-2633 ◽  
Author(s):  
Aastha Uppal ◽  
Matthew Ralphs ◽  
Wilson Kong ◽  
Matthew Hart ◽  
Konrad Rykaczewski ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Thermal Transport ◽  
Oxide Shell

scholarly journals Soft and Deformable Sensors Based on Liquid Metals

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4250 ◽  
Author(s):  
Taeyeong Kim ◽  
Dong-min Kim ◽  
Bong Jae Lee ◽  
Jungchul Lee
Keyword(s):  
Liquid Metal ◽  
Recent Literature ◽  
Liquid Metals ◽  
Major Constituent ◽  
Soft Robotics ◽  
Wearable Electronics ◽  
Sensors And Actuators ◽  
Electrically Conductive ◽  
Conductive Materials ◽  
Metal Sensing

Liquid metals are one of the most interesting and promising materials due to their electrical, fluidic, and thermophysical properties. With the aid of their exceptional deformable natures, liquid metals are now considered to be electrically conductive materials for sensors and actuators, major constituent transducers in soft robotics, that can experience and withstand significant levels of mechanical deformation. For the upcoming era of wearable electronics and soft robotics, we would like to offer an up-to-date overview of liquid metal-based soft (thus significantly deformable) sensors mainly but not limited to researchers in relevant fields. This paper will thoroughly highlight and critically review recent literature on design, fabrication, characterization, and application of liquid metal devices and suggest scientific and engineering routes towards liquid metal sensing devices of tomorrow.

scholarly journals CORRELATIVE AND COVARIANCE ANALYSIS OF THE ELECTROCONDUCTIVE FABRICS

2021 ◽  
Vol 2021 ◽  
pp. 300-307
Author(s):  
R.M. Aileni ◽  
L. Chiriac
Keyword(s):  
Electrical Resistance ◽  
Electromagnetic Waves ◽  
Surface Resistance ◽  
Air Permeability ◽  
Experimental Models ◽  
Covariance Analysis ◽  
Deposition Method ◽  
Polymeric Matrices ◽  
Conductive Materials ◽  
Scientific Approach

This paper presents the correlation and covariance analysis of the electrical resistance dependence of mass, thickness and air permeability of textile structures coated with magneto-conductive materials and used for protection against electromagnetic waves. For this scientific approach, 9 experimental models of compositesbased fabrics with electroconductive properties were made by applying different pastes based on organic polymeric matrices polyvinyl alcohol (PVA), copper (Cu), aluminium (Al), zinc (Zn), iron oxide (Fe3O4) and polypyrrole (PPY) solution using a classical deposition method such as scraping. The surface resistance was evaluated using a resistance meter device based on two parallel electrodes. From all samples analysed 5 samples based PPY, PVA-Ni, PVA–Ni-Al and PVA-Zn present a surface resistance between 103 and 105 Ω. Because the surface resistance has a lower value this means that the samples have a good conductivity to be used as layers for electromagnetic shielding systems.

Embedded magnetohydrodynamic liquid metal thermal transport: validated analysis and design optimization

2016 ◽  
Vol 28 (7) ◽  
pp. 862-877 ◽  
Author(s):  
Darren J Hartl ◽  
Geoffrey J Frank ◽  
Jeffery W Baur
Keyword(s):  
Finite Element ◽  
Liquid Metal ◽  
Design Optimization ◽  
Transport System ◽  
Thermal Transport ◽  
Algebraic Model ◽  
System Response ◽  
Reduced Order ◽  
Analysis And Design ◽  
Multi Objective

This work addresses the multi-fidelity analysis-driven design of a thermal transport system based on the flow of liquid metal through a structural laminate as induced by a solid-state magneto-hydro-dynamic (MHD) pump. A full three-dimensional model of the thermal transport system is both simplified to a reduced-order algebraic model, which correctly captures trends in the global system response, and alternatively implemented in an finite element framework, which captures essential global and local aspects of the system response not attainable via reduced-order modeling. The predictions of each model are validated against previously published experimental data. It is shown in detail for the first time in the context of MHD systems that a multi-fidelity approach to the multi-objective design optimization problem can leverage both the speed of the algebraic model and the accuracy of the finite element model, leading to effective predictions of optimal system designs in a reasonable amount of time. A relatively new algorithm for multi-objective and parameterized Pareto optimization is employed, and a clear path of continued development is identified.

Seti Space Missions

1997 ◽  
Vol 161 ◽  
pp. 761-776 ◽  
Author(s):  
Claudio Maccone
Keyword(s):  
Electromagnetic Waves ◽  
Space Missions ◽  
Gravitational Lens ◽  
The Sun ◽  
Space Antenna ◽  
Focal Distance ◽  
Large Space ◽  
The Earth ◽  
Space Antennas ◽  
New Space

AbstractSETI from space is currently envisaged in three ways: i) by large space antennas orbiting the Earth that could be used for both VLBI and SETI (VSOP and RadioAstron missions), ii) by a radiotelescope inside the Saha far side Moon crater and an Earth-link antenna on the Mare Smythii near side plain. Such SETIMOON mission would require no astronaut work since a Tether, deployed in Moon orbit until the two antennas landed softly, would also be the cable connecting them. Alternatively, a data relay satellite orbiting the Earth-Moon Lagrangian pointL2would avoid the Earthlink antenna, iii) by a large space antenna put at the foci of the Sun gravitational lens: 1) for electromagnetic waves, the minimal focal distance is 550 Astronomical Units (AU) or 14 times beyond Pluto. One could use the huge radio magnifications of sources aligned to the Sun and spacecraft; 2) for gravitational waves and neutrinos, the focus lies between 22.45 and 29.59 AU (Uranus and Neptune orbits), with a flight time of less than 30 years. Two new space missions, of SETI interest if ET’s use neutrinos for communications, are proposed.

Microwaves: Application in Electron Microscopy

1990 ◽  
Vol 48 (3) ◽  
pp. 140-141
Author(s):  
Anthony S-Y Leong ◽  
David W Gove
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Chemical Reactions ◽  
Electromagnetic Waves ◽  
Tissue Fixation ◽  
Primary Method ◽  
Dipolar Molecules ◽  
Wide Range ◽  
Time Required ◽  
Cryostat Sections

Microwaves (MW) are electromagnetic waves which are commonly generated at a frequency of 2.45 GHz. When dipolar molecules such as water, the polar side chains of proteins and other molecules with an uneven distribution of electrical charge are exposed to such non-ionizing radiation, they oscillate through 180° at a rate of 2,450 million cycles/s. This rapid kinetic movement results in accelerated chemical reactions and produces instantaneous heat. MWs have recently been applied to a wide range of procedures for light microscopy. MWs generated by domestic ovens have been used as a primary method of tissue fixation, it has been applied to the various stages of tissue processing as well as to a wide variety of staining procedures. This use of MWs has not only resulted in drastic reductions in the time required for tissue fixation, processing and staining, but have also produced better cytologic images in cryostat sections, and more importantly, have resulted in better preservation of cellular antigens.

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