Results 31 to 40 of about 2,247,954 (292)

Complex-structured 3D-printed wireframes as asteroid analogues for tomographic microwave radar measurements

Materials & Design, 2021
This study introduces a fused filament fabrication (FFF) process for manufacturing complex-structured asteroid analogue objects to be applied in tomographic microwave radar measurements and inversion studies. We describe an approach to control the volume
Liisa-Ida Sorsa, Christelle Eyraud, Alain Hérique, Mika Takala, Sampsa Pursiainen, Jean-Michel Geffrin   +5 more
doaj   +1 more source

Permittivity-Asymmetric Quasi-Bound States in the Continuum

, 2023
Breaking the in-plane geometric symmetry of dielectric metasurfaces allows us to access a set of electromagnetic states termed symmetry-protected quasi-bound states in the continuum (qBICs).
Andreas Aigner (14363208), Lucca Kühner (4001681), Fedja Jan Wendisch (14827502), Yuri Kivshar (1640680), Thomas Weber (819995), Rodrigo Berté (6000923), Andreas Tittl (1466572), Stefan A. Maier (655257), Leonardo de Souza Menezes (14345415), Martin Barkey (14363211)   +9 more
core   +1 more source

Evaluating the Relationship Between Relative Permittivity and Infill Density in 3D Printed Dielectric Slabs

IEEE Access
This paper investigates the relationship between relative permittivity and infill density in 3D printed dielectric slabs. As the infill density of a 3D printed substrate is varied, its relative permittivity also varies which affects the performance of ...
Bibek Kattel, Winn Elliott Hutchcraft, Richard K. Gordon   +2 more
doaj   +1 more source

Characterization of CVD graphene permittivity and conductivity in micro-/millimeter wave frequency range

AIP Advances, 2016
The permittivity and conductivity of chemical vapor deposited monolayer graphene are investigated up to 40 GHz. The characterization method is based on a coplanar waveguide transmission line structure that is fabricated on a multilayer substrate of Si ...
Yunqiu Wu, Yun Wu, Kai Kang, Yuanfu Chen, Yanrong Li, Tangsheng Chen, Yuehang Xu   +6 more
doaj   +1 more source

Permittivity of 3D-Printed Nylon Substrates with Different Infill Patterns and Densities for Design of Microwave Components

Designs, 2020
Printed circuit boards, chemical etching, and computer numerical control milling currently dominate industrial processes for manufacturing microwave components.
Hanxiong Hu, Swapnil Sinha, Nicholas Meisel, Sven G. Bilén   +3 more
doaj   +1 more source

Frequency Response Analysis of FAU, LTA and MFI Zeolites Using UV-Vis and Electrochemical Impedance Spectroscopy

Optics, 2023
Zeolites are porous materials that have cavities interconnected by channels. These crystalline materials are composed of Si-O tetrahedral structures, and according to the assembly of such tetrahedral structures, specific crystalline structures are ...
Fabian N. Murrieta-Rico, Joel Antúnez-García, Rosario I. Yocupicio-Gaxiola, Armando Reyes Serrato, Vitalii Petranovskii, Mufei Xiao, Oleg Sergiyenko, Wendy Flores-Fuentes, Julio C. Rodríguez-Quiñonez   +8 more
doaj   +1 more source

CaCu3Ti4O12 ceramics from co-precipitation method: Dielectric properties of pellets and thick films [PDF]

, 2009
Dielectric properties of CaCu3Ti4O12 (CCTO)-based ceramics and thick films (e ∼50m) prepared from powders synthesized by a soft chemistry method (co-precipitation) are presented and discussed.
Chartier, Thierry, Dutarde, E., Dutarde, Emmanuel, Rumeau, Axel, Lebey, Thierry, Guillemet-Fritsch, Sophie, Guillemet-Fritsch, S., Combettes, Céline, Rossignol, Fabrice, Barbier, Bertrand, Barbier, B.   +10 more
core   +1 more source

Dielectric properties of hops - an effect of bulk density

Research in Agricultural Engineering, 2017
Continuous detection of basic physical properties of freshly picked and cleaned wet hop cones would be very helpful for better control and automation of harvesting processes.
Jakub Lev, František Kumhála
doaj   +1 more source

The Effect of Interfacial Zone Due to Nanoparticle–Surfactant Interaction on Dielectric Properties of Vegetable Oil Based Nanofluids

IEEE Access, 2021
Nanoparticles are generally anti-lipophilic and have a tendency to aggregate when they are embedded in nanofluids. Thus, surfactants have a major role in achieving long term dispersion stability of nanofluids through surface modification of nanoparticles.
Rizwan A. Farade, Noor Izzri Abdul Wahab, Diaa-Eldin A. Mansour, Norhafiz B. Azis, Jasronita Bt. Jasni, Veerapandiyan Veerasamy, Arangarajan Vinayagam, Bandanawaz M. Kotiyal, T. M. Yunus Khan   +8 more
doaj   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source