scholarly journals Coating 1-Octanethiol-Coated Copper Nano-Ink on a Paper Substrate via Multi-Pulse Flash Light Sintering for Application in Disposable Devices

2020 ◽  
Vol 1 (1) ◽  
pp. 28-39
Author(s):  
Yeonho Son ◽  
Dongho Shin ◽  
Minkyu Kang ◽  
Caroline Sunyong Lee
Keyword(s):  
Energy Density ◽  
Electronic Devices ◽  
Pure Copper ◽  
Single Pulse ◽  
Radius Of Curvature ◽  
Ambient Conditions ◽  
Paper Substrate ◽  
Pulse Technique ◽  
Dry Coating ◽  
Coating Method

Inkjet-printed patterns were formed on a paper substrate using anti-oxidant copper nano-ink for application to disposable electronic devices. To prevent substrate damage, the pattern was flash light sintered under ambient conditions using the multi-pulse technique. Pure copper nanoparticles were coated with 1-octanethiol for oxidation resistance using the dry-coating method. Mixing these with 1-octanol solvent at a concentration of 30 wt% produced the copper nano-ink. Photo paper was used as the substrate. The contact angle between the photo paper and copper nano-ink was 37.2° and the optimal energy density for the multi-pulse flash light sintering technique was 15.6 J/cm2. Using this energy density, the optimal conditions were an on-time of 2 ms (duty cycle of 80%) for three pulses. The resistivity of the resulting pattern was 2.8 × 10−7 Ω∙m. After bending 500 times to a radius of curvature of 30 mm, the relative resistance (ΔR/R0) of the multi-pulse flash light-sintered pattern hardly changed compared to that of the unbent pattern, while the single-pulse-sintered pattern showed dramatic increase by 8-fold compared to the unbent pattern. Therefore, the multi-pulse light sintering technique is a promising approach to produce an inkjet-printed pattern that can be applied to disposable electronic devices.

High-pressure new phase of AgN3

2021 ◽  
pp. 2150386
Author(s):  
Shifeng Niu ◽  
Ran Liu ◽  
Xuhan Shi ◽  
Zhen Yao ◽  
Bingbing Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Density ◽  
Density Functional ◽  
High Energy ◽  
High Energy Density ◽  
Detonation Properties ◽  
Ambient Conditions ◽  
Structure Search ◽  
Enthalpy Difference ◽  
High Energy Density Material

The structural evolutionary behaviors of AgN3 have been studied by using the particle swarm optimization structure search method combined with the density functional theory. One stable high-pressure metal polymeric phase with the [Formula: see text] space group is suggested. The enthalpy difference analysis indicates that the Ibam-AgN3 phase will transfer to the I4/mcm-AgN3 phase at 4.7 GPa and then to the [Formula: see text]-AgN3 phase at 24 GPa. The [Formula: see text]-AgN3 structure is composed of armchair–antiarmchair N-chain, in which all the N atoms are sp2 hybridization. The inherent stability of the armchair–antiarmchair chain and the anion–cation interaction between the N-chain and Ag atom induce a high stability of the [Formula: see text]-AgN3 phase, which can be captured at ambient conditions and hold its stable structure up to 1400 K. The exhibited high energy density (1.88 KJ/g) and prominent detonation properties ([Formula: see text] Km/s; [Formula: see text] GPa) of the [Formula: see text]-AgN3 phase make it a potentially high energy density material.

scholarly journals Dry Coating Method Using Magnetically Assisted Impaction in a Randomly Turbulent Fluidized Bed

1997 ◽  
Vol 15 (0) ◽  
pp. 121-131 ◽  
Author(s):  
Rajiv K. Singh ◽  
Ali Ata ◽  
James Fitz-Gerald ◽  
Yakov Rabinovich ◽  
W. Hendrickson
Keyword(s):  
Fluidized Bed ◽  
Dry Coating ◽  
Turbulent Fluidized Bed ◽  
Coating Method ◽  
Magnetically Assisted

Photonic Curing of Copper Ink Films on Liquid Crystal Polymer Substrate

MRS Advances ◽  
2020 ◽  
Vol 5 (42) ◽  
pp. 2191-2199 ◽  
Author(s):  
Andrew Luce ◽  
Guinevere Strack ◽  
Oshadha Ranasingha ◽  
Edward Kingsely ◽  
Craig Armiento ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Energy Density ◽  
Copper Film ◽  
High Energy ◽  
Liquid Crystal Polymer ◽  
High Energy Density ◽  
Ambient Conditions ◽  
Sem Images ◽  
Total Energy Density ◽  
Crystal Polymer

AbstractThe application of intense pulsed light (IPL) to printed copper nanoparticle (CuNP) films enables rapid curing on low temperature substrates in ambient conditions. In this work, we printed CuNP ink on liquid crystal polymer (LCP; Vectra A resin) and then cured the films using a high energy density light pulse. High-resolution SEM images of the cured films revealed that the CuNPs on LCP were fused together. Optimal curing parameters were a 5 ms pulse, 75% duty cycle, and an energy density range of 4.2–5.2 J⋅cm-2. Sheet resistance, Rs, values as low as ~0.1 Ω⋅sq-1were obtained. The LCP substrate took on a yellowed appearance after the application of five pulses and exhibited a surface free energy increase. A filter that blocked wavelengths <450 nm was placed over the printed copper film on LCP. As expected, the presence of the filter decreased the total energy density and produced a cured film with high Rs; however, when the energy density was increased in the presence of the filter, the Rs remained high (0.95 Ω⋅sq-1). This preliminary work indicates that additional studies are required not only to understand low thermal budget curing on LCP, but also to elucidate the properties of substrates that enable low Rs.

scholarly journals Prediction of Contact Angle of Nanofluids by Single-Phase Approaches

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4558 ◽  
Author(s):  
Nur Çobanoğlu ◽  
Ziya Haktan Karadeniz ◽  
Patrice Estellé ◽  
Raul Martínez-Cuenca ◽  
Matthias H. Buschmann
Keyword(s):  
Contact Angle ◽  
Single Phase ◽  
Substrate Surface ◽  
Droplet Surface ◽  
Force Balance ◽  
Radius Of Curvature ◽  
Geometrical Parameters ◽  
Ambient Conditions ◽  
Sessile Droplet ◽  
Droplet Shape

Wettability is the ability of the liquid to contact with the solid surface at the surrounding fluid and its degree is defined by contact angle (CA), which is calculated with balance between adhesive and cohesive forces on droplet surface. Thermophysical properties of the droplet, the forces acting on the droplet, atmosphere surrounding the droplet and the substrate surface are the main parameters affecting on CA. With nanofluids (NF), nanoparticle concentration and size and shape can modify the contact angle and thus wettability. This study investigates the validity of single-phase CA correlations for several nanofluids with different types of nanoparticles dispersed in water. Geometrical parameters of sessile droplet (height of the droplet, wetting radius and radius of curvature at the apex) are used in the tested correlations, which are based on force balance acting on the droplet surface, energy balance, spherical dome approach and empirical expression, respectively. It is shown that single-phase models can be expressed in terms of Bond number, the non-dimensional droplet volume and two geometrical similarity simplexes. It is demonstrated that they can be used successfully to predict CA of dilute nanofluids’ at ambient conditions. Besides evaluation of CA, droplet shape is also well predicted for all nanofluid samples with ±5% error.

scholarly journals Laser patterned, high-power graphene paper resistor with dual temperature coefficient of resistance

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8262-8270 ◽  
Author(s):  
Sandeep Kumar ◽  
Kapil Bhatt ◽  
Pramod Kumar ◽  
Sandeep Sharma ◽  
Amit Kumar ◽  
...  
Keyword(s):  
Temperature Coefficient ◽  
High Power ◽  
Electronic Devices ◽  
Temperature Coefficient Of Resistance ◽  
Paper Substrate ◽  
Graphene Paper

Printing of electronic devices on a paper substrate using 2D graphene-based ink is an opening gate to innovative applications, where devices would be biodegradable, eco-friendly and can be disposed of with negligible impact on the environment.

scholarly journals Metal–metal chalcogenide molecular precursors to binary, ternary, and quaternary metal chalcogenide thin films for electronic devices

2016 ◽  
Vol 52 (28) ◽  
pp. 5007-5010 ◽  
Author(s):  
Ruihong Zhang ◽  
Seonghyuk Cho ◽  
Daw Gen Lim ◽  
Xianyi Hu ◽  
Eric A. Stach ◽  
...  
Keyword(s):  
Thin Films ◽  
Primary Amine ◽  
Electronic Devices ◽  
Solvent Mixtures ◽  
Metal Chalcogenides ◽  
Ambient Conditions ◽  
Metal Chalcogenide ◽  
Molecular Precursors ◽  
Metal Metal ◽  
Chalcogenide Thin Films

Bulk metals and metal chalcogenides are found to dissolve in primary amine–dithiol solvent mixtures at ambient conditions.

Thermal Transport in Hotspots Using the Lattice Boltzmann Method with Application to Silicon-on-Insulator Transistors

2014 ◽  
Vol 960-961 ◽  
pp. 337-340
Author(s):  
Yu Dong Mao ◽  
Ming Tian Xu
Keyword(s):  
Energy Density ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Thermal Wave ◽  
Electronic Devices ◽  
Silicon On Insulator ◽  
Thermal Waves ◽  
Fourier Law ◽  
Wave Effect ◽  
Boltzmann Method

Silicon-on-insulator (SOI) transistors have been widely used in the micro-electronic devices. The Lattice Boltzmann method (LBM) is employed to simulate the heat conductions of hotspots appeared in a SOI transistor. The results show that a thermal wave effect is appeared in micro-region, and it can not be found in Fourier prediction. Comparing the results obtained by the Fourier law and LBM, we find that the LBM solution shows approximately 22% higher energy density than the Fourier prediction. When two thermal waves form different hotspots meet together, a significant energy enhancement will be appeared.

scholarly journals Improvement of the flowability of particles by dry coating method and its evaluation.

1990 ◽  
Vol 27 (7) ◽  
pp. 457-462 ◽  
Author(s):  
Keijiro TERASHITA ◽  
Kiminori UMEDA ◽  
Kei MIYANAMI
Keyword(s):  
Dry Coating ◽  
Coating Method
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