Results 81 to 90 of about 557,238 (300)

Bio‐Orthogonally Crosslinked Supramolecular Polymer Bottlebrush Hydrogels for Long‐Term 3D Cell Culture

open access: yesAdvanced Functional Materials, EarlyView.
Fibrous benzenetrispeptide (BTP) hydrogels, fabricated via strain‐promoted azide‐alkyne cycloaddition (SPAAC) crosslinking, form robust, bioinert networks. These hydrogels can support 3D cell culture, where cell viability and colony growth depend on the fiber content.
Ceren C. Pihlamagi   +5 more
wiley   +1 more source

Quasi‐Static to Supersonic Energy Absorption of Nanoarchitected Tubulanes and Schwarzites

open access: yesAdvanced Functional Materials, EarlyView.
Nanoarchitected energy‐absorptive Tubulanes exhibit record energy absorption under quasi‐static conditions and exceptional inelastic energy dissipation under 750 m s−1 ballistics impact, with high performance spanning strain rates of 12 orders of magnitude.
Peter Serles   +16 more
wiley   +1 more source

Volt-ampere Characteristics of Metal-semiconductor Rectifier Diodes. Part 1: Formation of Conduction Currents and Displacement Currents at the p–n Junction

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика
Electric currents arising in metal-semiconductor contact are represented as the sum of diffusion currents and drift currents. The use of various empirical formulas was proposed to determine their value.
L. I. Gretchikhin
doaj   +1 more source

Design of microstrip microwave phase shifters for antenna arrays

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2017
The analysis of the features of microstrip discrete reflective phase shifters is given. The principle of forming multi-bit phase shifters based on the transmission-type phase shifter is presented.
E. M. Glushechenko
doaj   +1 more source

Shock isolator for operating a diode laser on a closed-cycle refrigerator [PDF]

open access: yes, 1979
A diode laser mounted within a helium refrigerator is mounted using a braided copper ground strap which provides good impact shock isolation from the refrigerator cold-tip while also providing a good thermal link to the cold-tip.
Jennings, D. E.
core   +1 more source

Characterization of Zero-Bias Microwave Diode Power Detectors at Cryogenic Temperature

open access: yes, 2016
We present the characterization of commercial tunnel diode low-level microwave power detectors at room and cryogenic temperatures. The sensitivity as well as the output voltage noise of the tunnel diodes are measured as functions of the applied microwave
Dubois, Benoît   +3 more
core   +1 more source

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

open access: yesAdvanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

SiC/Si diode trigger circuit provides automatic range switching for log amplifier [PDF]

open access: yes, 1967
SiC/Si diode pair provides automatic range change to extend the operating range of a logarithmic amplifier-conversion circuit and assures stability at or near the range switch-over point.

core   +1 more source

Bistable diode action in left-handed periodic structures

open access: yes, 2004
We study nonlinear transmission of an asymmetric multilayer structure created by alternating slabs of two materials with positive and negative refractive index. We demonstrate that such a structure exhibits passive spatially nonreciprocal transmission of
Ilya V. Shadrivov   +3 more
core   +1 more source

Deciphering Small Molecule Diffusion Parameters Across Light Responsive Polymersome Membranes

open access: yesAdvanced Functional Materials, EarlyView.
Light‐responsive polymersomes bearing donor–acceptor Stenhouse adducts (DASAs) enable programmable control over small‐molecule transport across synthetic membranes. By systematically varying DASA density, an optimal functionalization regime is identified that maximizes light‐gated permeability.
Farzina Matubbar   +7 more
wiley   +1 more source

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