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Technical Paper

Finite Element Analysis of Graphene Based Solar Photonic Battery for Electric Vehicle

2023-09-14
2023-28-0021
These nanostructures of 1D, such as nanowires, nanotubes and nanorods, present great potential for enhancing photon absorption, electron transit, and electron collection in solar cells. Graphene is a 2D hexagonal lattice of carbon atoms that is atomically thin. The remarkable mechanical properties of graphene are due to its structure, in which each carbon atom shares three of its four electrons in covalent bonds with its nearest neighbours (sp2 bonds). ...The remarkable mechanical properties of graphene are due to its structure, in which each carbon atom shares three of its four electrons in covalent bonds with its nearest neighbours (sp2 bonds). ...At the same time, the remaining fourth electrons are delocalized across the two-dimensional lattice in an orbital that accounts for the majority of the material’s optoelectronic capabilities. Also, Graphene is noted for having mobility that exceeds that of good metals. Furthermore, since a number of solution-based techniques, such as simple spin coating, may be used to create thin films of graphene a range of compositions can be created utilising low-cost, straightforward, and large-scale processes.
Journal Article

3D-Printed Antenna Design Using Graphene Filament and Copper Tape for High-Tech Air Components

2022-11-25
The homogeneous Cu and oxidized graphene (GO) were detected. The weight percent of carbon (C) and oxygen (O) on the graphene surface was 59.82% and 40.18%, respectively. ...Copper (Cu) tape and graphene filament were employed for the antenna patch component due to their benefits. The comprehensive comparative analysis between a full-wave model and a 3D-printed prototype of the antenna via the CST Microwave Studio program was demonstrated here. ...The GO (011) peak was seen in the XRD spectra of the graphene sheet. The simulation and measurement comparisons are quite satisfactory. The antennas, produced using a conventional 3D printer, will be beneficial for various applications in aeronautics and astronautics.
Technical Paper

INCORPORATING METHODS OF GRAPHENE IN POLYMERIC NANOCOMPOSITES TOWARDS AUTOMOTIVE APPLICATIONS -A BRIEF REVIEW

2024-01-08
2023-36-0015
This work aims to develop a PA6 nanocomposite with glass fiber (GF) and graphene nanoplatelets (GNPs) focusing on automotive parts application. Polyamide 6 is a semi-crystalline polymer that exhibits high fatigue and flexural strength, making it viable for rigorous applications. ...Among the fillers of nanocomposites are graphene nanoplatelets, which stand out in nanocomposites due to their easy and safe inclusion in polymer matrices, as can be seen in recent studies on the toxicity of GNPs, where it was found that graphene is much safer than carbon black for large-scale use, this being a positive point regarding the application of GNPs. ...Among the fillers of nanocomposites are graphene nanoplatelets, which stand out in nanocomposites due to their easy and safe inclusion in polymer matrices, as can be seen in recent studies on the toxicity of GNPs, where it was found that graphene is much safer than carbon black for large-scale use, this being a positive point regarding the application of GNPs.
Technical Paper

Friction Force Reduction for Electrical Terminals using Solution-Processed Reduced Graphene Oxide Coating

2021-04-06
2021-01-0348
We have previously shown that plasma-enhanced chemical vapor deposition (PECVD) of graphene on gold (Au) and silver (Ag) terminals can significantly reduce the insertion force (friction force during the terminal insertion process). ...In this study, reduced graphene oxide was prepared using a low-cost solution process and applied onto metallic terminals. ...The reduced graphene oxide (rGO) suspended in polyalphaolefin (PAO) base oil was coated on Sn terminals via a dip-coating method.
Technical Paper

Polyurethane foam coated with organic filers for sound absorption: A briefre view

2024-01-08
2023-36-0088
Some of the micro- and nano-particles used are natural fibers (like cellulose, fir, palm), silica, clay, graphene and derivatives, zeolite, and others. This review is an overview of recent advances in the incorporation of fillers in PU foams and the influence they have on the sound absorption capacity of the foams.
Journal Article

Development of Exfoliated Graphite using Innovative Chemical Technique for Aerospace Applications

2022-03-08
2022-01-0051
FTIR studies have confirmed the presence of -C=C at wavenumber of 1652 cm-1 and demonstrates the formation of graphene. It was observed that the quality of exfoliated graphite and yield were improved from the present method of processing of graphene nanosheets. ...It was observed that the quality of exfoliated graphite and yield were improved from the present method of processing of graphene nanosheets. Further, the process time is less when compared with existing conventional methods.
Magazine

Tech Briefs: September 2018

2018-09-01
Low Power Optical Phase Array Using Graphene on Silicon Photonics Electrostatic doping of 2D materials embedded in waveguides could enable ultrafast devices with unprecedented power.
Magazine

Aerospace & Defense Technology: February 2021

2021-01-28
Empowering Soldiers Through ISPDS Dispensable Gels vs Gap Filler Pads An Analysis of Thermal Management Materials Electronic Warfare Vying for Control of the Electromagnetic Spectrum More Bang for the Buck A New Design and Manufacturing Method for Deep Penetrating Bomb Cases A Comprehensive Way to Use Bonding to Improve RF Performance of Low Noise Amplifiers Army and Universities Deploy New Warfighter Communication Technology Radiation Effects on Electronics in Aligned Carbon Nanotube Technology (RadCNT) Characterizing the fundamental mechanisms and charge transport phenomena governing the interactions between ionizing and non-ionizing radiation with carbon-based (nanotube and graphene) field-effect transistors (FETs) devices and integrated circuits (ICs). An Ultrafast Testbed for Comprehensive Characterization of Photonics, Electronic, and Optoelectronic Properties of Integrated Nanophotonic Structures High-speed testing technology will enable advances such as new digital signal processing/computing platforms in the optical domain through the development of innovative high-speed and low-power nonlinear optical processing cores that can be co-integrated with digital signal processors to enable new functionalities.
Technical Paper

Mechanical Properties Enhancement of A356 Alloy Hybrid Composite by FSP and SP Route

2022-12-23
2022-28-0541
The main objective of the proposed work was cast A356 alloy reinforced with nano form of 6wt% silicon carbide (SiC) harder particles and 3wt% self-lubricant graphene (Gr) was used to fabricated a surface nano hybrid composite through FSP technique. SP route was performed on the FSP-ed samples with optimal parametric conditions for obtaining improved mechanical performances.
Journal Article

Optimization and Performance Evaluation of Additives-Enhanced Fluid in Machining Using Split-Plot Design

2024-04-15
Building on this promising fluid, we explored further improvements by adding three nanoscale additives: Nano-graphite (GHT), zinc oxide (ZnO), and reduced graphene oxide (RGRO) at different weight percentages (0.06%, 0.08%, 0.1%, and 0.3%). Comparative tests using a four-ball wear tester revealed that the fluid with 0.08% nano-GHT performed the best, boasting a CFN of 0.039, surpassing both the unmodified fluid and conventional commercial cutting fluids (CMCFs).
Book

Nanotechnology: A Crash Course

2010-01-01
The past few decades have seen an explosive increase in our ability to create nanostructures and nanosystems with a great degree of control, using a diversity of techniques. This ability has been accompanied by a similar enhancement in our ability to characterize structures and systems at the nanoscale. Nanotechnology: A Crash Course provides a broad overview of those nanostructures and nanosystems (together termed "Nanotechnology"). It covers structural characteristics and properties of nanostructures, nanofabrication techniques, methods for characterizing nanostructures, and applications for nanomaterials. The book also provides a thought-provoking assessment of the possible implications of nanotechnology in society, and likely future trends.
Book

Polymers in Aerospace Applications

2010-01-01
This review report gives an overview of how polymers are used in aerospace applications. Some of the topics covered are composites, including thermosets, thermoplastics and nanocomposites; fiber reinforcement of composites; and specialized applications. For each type of composite, the chemistry, cure methods, fabrication methods, mechanical properties, thermal properties and environmental degradation are considered. From the applications’ perspective, the title discusses sealants, structural adhesives, foams, primer paint, shape memory alloys, electroactive devices, MEMS, vibration damping, NLO properties and ablative polymers. This review report is accompanied by approximately 400 abstracts compiled from the iSmithers Polymer Library, the largest dedicated resource of polymer information in the world, to facilitate further reading on this subject. A subject index and a company index are included.
Magazine

Aerospace & Defense Technology: September 2019

2019-09-01
Air Caster Technology Safeguard Satellites During Assembly and Testing Operational Considerations for High-Reliability Interconnects in Military and Aerospace Applications Understanding Fiber Optic Transceiver Design and Test Rules Acceleration Resistant HiK Heat Spreader Shape-Shifting Origami Could Help Antenna Systems Adapt On-the-Fly NASA Eyes GPS at the Moon for Artemis Missions Spatiotemporal Imaging Exploiting Structured Sparsity Overcoming the conventional limits of spatiotemporal imaging by applying compressed sensing and sparse representations to reduce the amount of data acquired while maintaining high image resolution.
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