Results 61 to 70 of about 367,156 (268)

PARTICULARITIES OF INTER-TYPE INTERACTION IN DISK QUASIOPTICAL DIELECTRIC RESONATOR IN THE CASE OF INTERNAL EXCITATION OF PARASITIC OSCILLATIONS [PDF]

Радиофизика и электроника, 2015
Disc dielectric resonators with whispering gallery modes are usually characterized by high Q-factor, nevertheless, dense spectrum of these oscillation is the factor which impedes their use as microwave elements.
A. Ya. Kirichenko, G. V. Golubnichaya
doaj   +1 more source

Dynamically Actuated Reconfigurable Topographical Surface Enables Active Control of Implant‐Associated Infections

Advanced Functional Materials, EarlyView.
A dynamically actuated reconfigurable topographical surface (DARTS) integrates contact‐mediated bactericidal nanotopography with programmable mechanical actuation to actively disrupt bacterial biofilms. Dynamic surface reconfiguration enhances bacterial killing and suppresses implant‐associated infections in vivo, providing a new strategy for active ...
Mohammad Asadi Tokmedash, Jihun Lee, J. Scott VanEpps, Sungmin Nam, Jouha Min   +4 more
wiley   +1 more source

Direct Integration of Conductive, Emissive Perovskite Nanocrystals Into Efficient Light‐Emitting Diodes Without Post‐Synthetic Ligand Exchange

Advanced Functional Materials, EarlyView.
We demonstrate the direct integration of CsPbBr3 perovskite nanocrystals (PNCs) into optoelectronic devices without post‐synthetic ligand exchange. This is achieved by synthesizing PNCs stabilized by strong‐binding‐energy oleylammonium–bromide pairs instead of oleate ligands. The resultant low ligand density and minimized surface defects enhance charge
Jigeon Kim, Yubin Lee, Gyeong Eun Seok, Dong Gyu Lee, Seongwon Lee, Huieun Kim, Sung Woo Jang, Wooyeon Kim, Wondo Choi, Woo Hyeon Jeong, Donghun Lee, Min Jae Ko, Won Bin Im, Jinhan Cho, Tae Kyung Lee, Bo Ram Lee, Younghoon Kim   +16 more
wiley   +1 more source

Roll‐to‐Roll Processable EC/TC Hybrid Smart Windows Driven by a Bidirectional Dual‐Chromic Polymer Electrolyte

Advanced Functional Materials, EarlyView.
We present a scalable EC/TC hybrid smart window using a DCPE that enables tunable solar modulation (ΔTsol:15–43%), fast electrochromic switching (<90 s), and strong thermal blocking (10–14°C reduction). HPMC improves thermal stability, while an optimized ISL enhances EC performance.
Soyeon Kim, Euiseok Jeong, Muhammad Jahandar, Huynh Tan Thanh Kha, Dong Chan Lim   +4 more
wiley   +1 more source

Oxygen‐Vacancy‐Regulated Crystallization and Ferroelectric Phase Stabilization in Hf0.5Zr0.5O2 Thin Films

Advanced Functional Materials, EarlyView.
Temperature‐resolved in situ grazing‐incidence wide‐angle X‐ray scattering reveals that oxygen vacancies actively regulate crystallization in Hf0.5Zr0.5O2 thin films. By decoupling macroscopic strain from intrinsic phase evolution, a vacancy‐lean environment significantly lowers the activation energy barrier for crystallization.
Hyun Woo Jeong, Jaewook Lee, Junseong Seo, Hyojun Choi, Dong Hee Han, Seungjae Heo, Tae‐Yeol Jeon, Yunseok Kim, Younghwan Lee, Min Hyuk Park   +9 more
wiley   +1 more source

Dielectric Characterization Using Reflected Group Delay of a Partially-Filled Coaxial Resonator

IEEE Access
This paper features an effective and novel method to characterize dielectric materials using the reflected group delay of an over-coupled partially-filled coaxial resonator.
Gaurav Walia, Paul D. Laforge, Shahid Azam, Rajeevkaran Paranthaman   +3 more
doaj   +1 more source

The Trapezoidal Dielectric Resonator Antenna [PDF]

IEEE Transactions on Antennas and Propagation, 2008
The operational concepts of the trapezoidal dielectric resonator antennas (DRAs) are presented and their performance is studied theoretically and experimentally. The rectangular parallelepiped is a special case of the more general trapezoid and therefore a comparison between both is useful in order to highlight their similarities and differences. It is
Almpanis, G., Fumeaux, C., Vahldieck, R.
openaire   +3 more sources

Pressure‐Assisted Dimensional Transformation of 2D Hydrogenated Borophene into 0D Boron Quantum Dots

Advanced Functional Materials, EarlyView.
Hydrogenated borophene (HB) is transformed into distinct boron nanostructures through a solvent‐free thermal process. Under flowing nitrogen, hydrogen escape promotes reconstruction into B2O3 nanoplatelets, whereas hydrogen‐induced pressure under sealed conditions facilitates fragmentation into boron quantum dots.
Ozden Gunes Yildiz, Ramin Yazdaanpanah, Yongfeng Guo, Pouriya Naziri, Sachin Kulkarni, Martina Mercurio, Maria Cristina Larciprete, Ilaria Fratoddi, Paul Simon, Wan‐Lu Li, Koray Aydin, Umut Aydemir   +11 more
wiley   +1 more source

A Novel and Accurate Method for the Design of Dielectric

Iranian Journal of Electrical and Electronic Engineering, 2006
The development of numerical techniques now permits us to analyze complex structures such as dielectric resonator filters and planar passive elements for coplanar monolithic microwave integrated circuits.
F. Hojjat Kashani, Salimnejad
doaj  

Microwave studies of dielectric resonators [PDF]

, 2011
A review of microwave studies of dielectric disks is presented, including field distributions and emission patterns of quadrupolarly deformed cavities, coupling and interactions between neighboring circular disks, and a realization of graphene in terms of a honeycomb lattice made of disks with an high index of refraction.
Kuhl, Ulrich, Schäfer, R., Stöckmann, H.-J.   +2 more
openaire   +2 more sources