Results 121 to 130 of about 207,029 (307)
60GHz Circularly Polarized Patch Antenna Fed By Microstrip-Line
, 2007 本論文中，我們主要是提出一種用微帶線饋入的圓極化微帶天線，經由模態分析法加以分析。首先將針對各式圓極化微帶天線進行介紹。 理論分析以共振腔模型為基礎，求解圓形微帶天線在共振腔中的模態。由模態分析的結果，可推導出在共振腔金屬面上的電流分布情形。而在本論文中是採直接饋入圓形微帶天線，但爲了增加頻寬和極化程度，經由結合循序旋轉的設計技巧，在此設計了微帶線饋入之圓形極化微帶線天線陣列。從模擬與量測結果當中，我們可以明顯的發現使用循序旋轉的技巧的 1x2 陣列天線，在頻寬上有明顯的提升 ...
賴宗民, Lai, Tzung-Ming
core
Advanced Healthcare Materials, EarlyView.Biologically derived and hybrid nonviral nanovectors are examined as distinct but convergent design approaches. Integrating synthetic components with biologically functionalized membranes allows efficient interactions with complex cellular environments.
Clara Baldari +10 more
wiley +1 more source
Electronics LettersThis letter proposes a novel planar endfire circularly polarized antenna with widened half‐power beamwidth. Widened azimuth beamwidth mechanism of 2D sectorial electric dipole is theoretically revealed, thus it is able to combine with a rectangular ...
Shan‐Shan Gu, Wen‐Jun Lu, Lei Zhu
doaj +1 more source
Advanced Materials, EarlyView.Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu +3 more
wiley +1 more source
Evidence for Itinerant Ferromagnetic Flat Bands Producing Large Transverse Responses
Advanced Materials, EarlyView.Itinerant ferromagnetic flat bands are demonstrated in GdCo5 with a high Curie temperature of 940K, a stacked honeycomb–kagome lattice, through angle‐resolved photoemission spectroscopy and magneto‐thermoelectric measurements. These topological flat bands generate large Berry curvaturte, producing gigantic anomalous Nernst effect with record‐high ...
Susumu Minami +15 more
wiley +1 more source
Sub‐Nanometer Curvature Unlocks Quantum Orbital Flexoelectricity in Graphene
Advanced Materials, EarlyView.In self‐assembled, reproducible, large‐area, quasi‐pristine graphene nanowrinkles, extreme curvature forces out‐of‐plane π‐electrons toward hybridization, driving a transition from classical to quantum orbital flexoelectricity. As curvature approaches the fundamental physical limit set by the C─C bond length, the resulting polarization increases by ...
Sathvik Ajay Iyengar +8 more
wiley +1 more source
Nature CommunicationsCircularly polarized luminescence materials with broad color tunability are highly valuable for applications in 3D display and photonic technologies. Here we show that incorporating intermolecular charge-transfer complexation into chiral supramolecular ...
Yuchen Guo +4 more
doaj +1 more source
Advanced Materials, EarlyView.Azobenzene photoswitches translate molecular‐scale E/Z photoisomerization into macroscopic material responses and device‐level photonic functions. This Review highlights how azobenzene research has evolved from molecular photochemistry to photoalignment, mass migration, photomechanics, and heat release, ultimately enabling holography, reconfigurable ...
Heeju Son +20 more
wiley +1 more source
π-System Bistability Determines the Circularly Polarized Luminescence in Helicene para-Phenylenes [PDF]
We resolve the origin of the anomalous circularly polarized luminescence (CPL) observed in helicene para-phenylenes (HPPs), a new class of chiral macrocyclic nanocarbons reported recently. We show by synthesis of HPPs that embed [5]helicene unit that the
Carlos, M. Cruz +3 more
core +1 more source
Advanced Materials, EarlyView.Molecular doping of conjugated polymers is fundamentally constrained by thermodynamic phase behavior. This Perspective reframes doping efficiency and stability in terms of miscibility limits, binodals, and solvus boundaries, highlighting the role of effective interaction parameters and charge transfer.
Somayeh Kashani +10 more
wiley +1 more source