Results 91 to 100 of about 803,402 (286)

Hopping‐Mediated Zero‐Bias Photocharge Retention in Solution‐Processed Van Der Waals Heterostructures

Advanced Functional Materials, EarlyView.
Liquid–liquid interface assembly enables the fabrication of solution‐processed MoS2 and WSe2 centimeter‐scale, nanometer‐thick type‐II heterostructures on paper. Interfacial charge separation and hopping‐limited recombination produce rectification and persistent photocharge retention at zero bias.
Aniello Pelella, Andrea Sessa, Yi‐Chen Tsai, Xuzhao Liu, Abdul Mannan, George Greaves, Yahya Saboon, Ben Spencer, Antonio Di Bartolomeo, Cinzia Casiraghi, Jessica Boland, Alessandro Grillo   +11 more
wiley   +1 more source

Modulated Geodesic Lens Antenna Array

, 2021
We present the design of a geodesic Luneburg lens array antenna. The water drop lens is a compact and highly-efficient alternative to the planar Luneburg lens. Our proposed lens antenna is able to steer 110 deg in azimuth with negligible scan losses.
Qingbi Liao, Nelson J. G. Fonseca, Oscar Quevedo-Teruel, Pilar Castillo-Tapia, Castillo Tapia, Pilar,, Liao, Qingbi,, Fonseca, Nelson J. G.,, Quevedo-Teruel, Oscar,   +7 more
core   +1 more source

Optical Detection of Cellular Signals at Material Interfaces

Advanced Healthcare Materials, EarlyView.
Emerging functional materials are transforming optical detection of cellular signals. This review highlights optical techniques that exploit the unique optical properties of diverse materials to detect and quantify cellular electrical, chemical, and mechanical signals, and discusses key opportunities and challenges.
Xuchen Ren, Jitong Ren, Zixin Zhang, Koney Eungkon Kim, Francis L. Hong, Yuecheng Peter Zhou   +5 more
wiley   +1 more source

Wideband blade monopole antenna with sleeved coaxial feed [PDF]

, 2009
A wideband planar monopole antenna requiring a small ground plane is described. Numerical and measured results confirms the antenna has good radiation efficiency and stable omni-directional radiation patterns over an impedance bandwidth of 4.1:1 covering
Morrow, Ivor L., Dingley, G. P., G. P. Dingley, W. G. Whittow, Cooper, A., I. L. Morrow, Whittow, W. G., A. Cooper   +7 more
core   +1 more source

Chemical Strategies for Multistimuli Responsive Dynamic Covalent Materials in Regenerative Medicine

Advanced Healthcare Materials, EarlyView.
Multistimuli responsive dynamic covalent materials integrate reversible chemistry with the complex chemical, mechanical, and biochemical cues of regenerative environments. This review highlights chemical strategies based on orthogonal dynamic bonds, multicomponent networks, and hierarchical architectures to regulate mechanics, degradation, and ...
Saurabh Joshi, Matthew B. Baker, Dominik Schauenburg   +2 more
wiley   +1 more source

Antenna representation in two-port network scattering parameter [PDF]

, 2011
This paper proposes a representation of antenna in two-port network s-parameter, by exploiting the analogy between the antenna and a two-port network, to produce a suitable method for evaluating antennas in system and circuit simulation.
Ghassemlooy, Zabih, Rahman, Tharek, Tharek Abdul Rahman, Razali Ngah, Prakoso, Teguh, Teguh Prakoso, Ngah, Razali, Zabih Ghassemlooy, Abd. Rahman, Tharek   +8 more
core   +1 more source

Near‐Infrared Light‐Activated Polydopamine Nanoparticles Conjugated With Transferrin Peptides for Enhanced Brain Accumulation

Advanced Healthcare Materials, EarlyView.
This study demonstrates that Tf‐PDA NPs combine a receptor‐mediated targeting with mild photothermal activation to enhance nanoparticle accumulation in the brain. NIR‐activated Tf‐PDA NPs increase BBB permeability to NPs in vitro and in vivo without inducing cytotoxicity or adverse immune responses.
Rafaela Ferrão, Susana Simões, Paulo Rodrigues‐Santos, Vitor Francisco, Akhilesh Rai, Lino Ferreira   +5 more
wiley   +1 more source

Design and Implementation of an X-Band Horn Antenna With a Metamaterial Lens Using 3D Printing Technology

IEEE Access
This paper presents the design and implementation of an X-band horn antenna, which operates over a frequency range of 7 – 9 GHz for small satellite communication systems in Low Earth Orbit (LEO), employing metamaterials and 3D printing technology.
Ji-Haeng Cho, Kyoung-Youl Park, Chul-Min Lim, Hae-Won Son   +3 more
doaj   +1 more source

All-Dielectric Meta-lens Designed for Photoconductive Terahertz Antennas

IEEE Photonics Journal, 2017
We present an all-dielectric meta-lens designed to collimate terahertz waves emitted from a terahertz antenna. The meta-lens is not only thinner than a conventional bulk silicon lens, but also promises to eliminate the use of parabolic mirrors in a ...
Qing Yu, Jianqiang Gu, Quanlong Yang, Ying Zhang, Yanfeng Li, Zhen Tian, Chunmei Ouyang, Jiaguang Han, John F. OHara, Weili Zhang   +9 more
doaj   +1 more source

Role of the Recombination Zone in Organic Light‐Emitting Devices

Advanced Materials, EarlyView.
This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley   +1 more source