Results 81 to 90 of about 639,513 (288)

Input impedance of integrated elliptical lens antennas

, 1999
An efficient method is presented for prediction of the input impedance of integrated elliptical lens antennas, excited by a focal radiator which consists of either a resonant slot or a slot-coupled patch.
MACI, STEFANO, P. J. I. DE MAAGT, A. NETO, L. BORSELLI   +3 more
core   +1 more source

ATP‐Mediated Bidirectional Communication Between Natural and Artificial Cells for Controlled Bioreactions

Advanced Functional Materials, EarlyView.
Establishment of bidirectional communication behavior between natural and artificial cells. The first type of communication from natural dendritic cells to artificial polymeric cells was achieved via ATP release after cell lysis. The released ATP was taken up via gated UV‐controlled permeability increase of the polymeric membrane for performing ...
Ilona Kalte, Tsvetomir Ivanov, Leonhard Seufert, Shoupeng Cao, Lucas Caire da Silva, Volker Mailänder, Katharina Landfester   +6 more
wiley   +1 more source

Electronics-Based Free-Space Terahertz Measurement Using Hemispherical Lens Antennas

IEEE Access, 2019
This paper introduces a novel free-space terahertz (THz) characterization setup featuring an electronic-based technique and miniature additive-manufactured hemispherical lens antennas.
Nonchanutt Chudpooti, Natapong Duangrit, Prayoot Akkaraekthalin, Ian D. Robertson, Nutapong Somjit   +4 more
doaj   +1 more source

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

Flat Lens-in-Package Architecture Using Multi-Axis Machining in D-Band

IEEE Open Journal of Antennas and Propagation
This work presents an electrically-small lens that has been redesigned towards a flat interface. This way, the lens is easier to integrated, compared to an earlier introduced spherical core-shell lens concept. The lens is created from a single dielectric
Nick Van Rooijen, Maria Alonso-delPino, Juan Bueno, Nuria Llombart   +3 more
doaj   +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

Dielectric Lens-Type CATR System Using a Serrated Structure for Antenna Radiation Pattern Measurement

IEEE Access
Large aperture antennas are used to compensate for high propagation losses in the millimeter wave bands used by Beyond 5G/6G, satellite, and automotive collision prevention radars.
Genma Hattori, Sou Ema, Yuta Horie, Toshiyuki Maeyama   +3 more
doaj   +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

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

Terahertz multi-beam antenna using photonic crystal waveguide and Luneburg lens

APL Photonics, 2018
Recent years have seen the emergence of efficient, general-purpose terahertz photonic-crystal waveguides etched from high-resistivity silicon. Systems founded upon this platform will require antennas in order to interface with free-space fields.
Daniel Headland, Withawat Withayachumnankul, Ryoumei Yamada, Masayuki Fujita, Tadao Nagatsuma   +4 more
doaj   +1 more source