Results 71 to 80 of about 42,485 (301)

Zwitterionic Self‐Assembled Monolayer for Simultaneous Noise Suppression and Hole Extraction in High‐Performance Near‐Infrared Organic Photodetectors

open access: yesAdvanced Functional Materials, EarlyView.
This study presents a new hole transporting material (HTM) mechanism for self‐assembled monolayers in near‐infrared organic photodetectors. The formation of zwitterions induces a strong electric field that significantly increases the work function of HTM‐coated indium tin oxide substrates. The devices exhibit low dark current and noise, along with high
Jiyoung Shin   +9 more
wiley   +1 more source

QPSO for failure correction of linear array of mutually coupled parallel dipole antennas with desired side lobe level and return loss

open access: yesJournal of King Saud University: Engineering Sciences, 2017
A method based on quantum particle swarm optimization is proposed for correcting radiation pattern of a uniformly spaced linear array of parallel half-wavelength vertical very thin dipole antennas when more than one element of the array is completely ...
R. Muralidharan   +3 more
doaj   +1 more source

On the 5G Communications: Fractal-Shaped Antennas for PPDR Applications

open access: yesComplexity, 2021
In this study, one method of using antennas based on fractals to cover few kinds of public protection and disaster relief (PPDR) communications was presented.
Mihai-Virgil Nichita   +3 more
doaj   +1 more source

Probe modeling for millimeter-wave integrated-circuit horn antennas [PDF]

open access: yes, 1992
Integrated-circuit probe-excited horn-antenna arrays etched in silicon are well developed. They are a very promising class of antenna arrays for milli-meter and submillimeter applications.
Chiao, Jung-Chih   +3 more
core   +1 more source

Stabilization of Miscible Aqueous Phases via Diffusion‐Controlled Multifunctional Nanoparticle‐Ligand Complexation

open access: yesAdvanced Functional Materials, EarlyView.
This study presents a versatile approach to harnessing miscible aqueous domains, enabling liquid‐in‐liquid compartmentalization using a barrier formed in situ rather than bulk immiscibility. The barrier forms upon the complexation of multifunctional nanoparticles and ligands at the contact boundary of aqueous phases.
Seyyed Alireza Hashemi   +7 more
wiley   +1 more source

A Multiband Fractal Dipole Antenna for Wireless Communication Applications [PDF]

open access: yesEngineering and Technology Journal, 2010
mmunication applications. The proposed fractal antenna design is based onfractal geometry of the second level tent function transformation. Due to theresulting geometrical structures of a fractal tent function curve depend on thestarting angles of the ...
Jawad K. Ali   +2 more
doaj   +1 more source

Estimation of dielectric constant for various standard materials using microstrip ring resonator [PDF]

open access: yes, 2017
Microstrip ring resonator (MRR) is known for dielectric constant determination and many studies used Teflon as a standard sample. However, there are many other materials available which able to perform better or equivalence as the Teflon in calibrating ...
Abbas, Zulkifly   +3 more
core   +1 more source

Experimental testbed for seawater channel characterization

open access: yes, 2016
Shallow seawaters are problematic for acoustic and optical communications. Sensor networks based on electromagnetic (EM) communications are evaluated in this environment.
Cardona, Laura   +8 more
core   +1 more source

Nanorod optical antennas for dipolar transitions [PDF]

open access: yes, 2009
Optical antennas link objects to light. Here, we analyze metal nanorod antennas as cavities with variable reflection coefficients to derive the interaction of dipolar transitions with radiation through the antenna modes.
Stefani, Fernando D.   +2 more
core   +2 more sources

Ferroelectricity in Antiferromagnetic Wurtzite Nitrides

open access: yesAdvanced Functional Materials, EarlyView.
We establish MnSiN2${\rm MnSiN}_2$ and MnGeN2${\rm MnGeN}_2$ as aristotypes of a new multiferroic wurtzite family that simultaneously exhibits ferroelectricity and antiferromagnetism with altermagnetic spin splitting. By strategically substituting alkaline‐earth metals, we predict new materials with coexisting switchable polarization, spin texture, and
Steven M. Baksa   +3 more
wiley   +1 more source

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