Bend radius

About: Bend radius is a research topic. Over the lifetime, 3303 publications have been published within this topic receiving 35415 citations. The topic is also known as: minimum bend radius.

Non-volatile organic memory with sub-millimetre bending radius

Abstract: Flexible organic electronics operated at extreme mechanical conditions are crucial for the next generation of smart foldable electronic applications. Kim et al. show non-volatile organic memory devices that are subject to sharp bending deformation without protection from a stress-release layer.

Ultra-thin and smooth transparent electrode for flexible and leakage-free organic light-emitting diodes

Abstract: A smooth, ultra-flexible, and transparent electrode was developed from silver nanowires (AgNWs) embedded in a colorless polyimide (cPI) by utilizing an inverted film-processing method. The resulting AgNW-cPI composite electrode had a transparency of >80%, a low sheet resistance of 8 Ω/□, and ultra-smooth surfaces comparable to glass. Leveraging the robust mechanical properties and flexibility of cPI, the thickness of the composite film was reduced to less than 10 μm, which is conducive to extreme flexibility. This film exhibited mechanical durability, for both outward and inward bending tests, up to a bending radius of 30 μm, while maintaining its electrical performance under cyclic bending (bending radius: 500 μm) for 100,000 iterations. Phosphorescent, blue organic light-emitting diodes (OLEDs) were fabricated using these composites as bottom electrodes (anodes). Hole-injection was poor, because AgNWs were largely buried beneath the composite's surface. Thus, we used a simple plasma treatment to remove the thin cPI layer overlaying the nanowires without introducing other conductive materials. As a result, we were able to finely control the flexible OLEDs' electroluminescent properties using the enlarged conductive pathways. The fabricated flexible devices showed only slight performance reductions of <3% even after repeated foldings with a 30 μm bending radius.

Optical fiber enclosure system using integrated optical connector and coupler assembly

Abstract: An optical fiber enclosure system includes a plurality of integrated optical connector and coupler assemblies. The first optic coupler is integrated adjacent to the ferrule in the connector. In a preferred embodiment, the integrated optical connector coupler is constructed in a compact package such that when installed in the optical fiber enclosure no part of the coupler connector assembly protrudes beyond the footprint of the fiber enclosure and yet maintains an industry recommended minimum bend radius of 1.5 inches on the output cable ports thus allowing the fiber enclosure front panel to close without impinging on the cables of the assembly.

Phase Diagrams for Microemulsions

Abstract: A phenomenological mean-field model of globules for a three-component microemulsion is presented and typical phase diagrams are obtained. Two types of two-phase coexistence are found as well as a three-phase equilibrium. The topology of the phase diagram is determined by the ratio of the critical globule radius to the natural bending radius and by the radius dependence of the attractive interactions.

Quantitative analysis of bending efficiency in photonic-crystal waveguide bends at lambda = 1.55 mum wavelengths.

Abstract: Based on a photonic-crystal slab structure, a 60° photonic-crystal waveguide bend is successfully fabricated. Its bending efficiency within the photonic bandgap is measured, and near 100% efficiency is observed at certain frequencies near the valence band edge. The bending radius is ∼1 μm at a wavelength of λ∼1.55 μm. The measured η spectrum also agrees well with a finite-difference time-domain simulation.