Multimaterial 3D printing using microfluidic printheads specifically designed for seamless switching between two visco­elastic materials "on-the-fly" during fabrication is demonstrated. This approach opens new avenues the digital assembly of functional matter with controlled compositional and property gradients at microscale.

Drawbacks of current carbon dioxide capture methods include corrosivity, evaporative losses and fouling. Separating the solvent from infrastructure effluent gases via microencapsulation provides possible solutions to these issues. Here we report materials that may enable low-cost energy-efficient flue gas. Polymer microcapsules composed liquid carbonate cores highly permeable silicone shells are produced by microfluidic assembly. This motif couples capacity selectivity sorbents with high...

This study establishes an approach to 3D print Li‐ion battery electrolytes with controlled porosity using a dry phase inversion method. ink formulation utilizes poly(vinyldene fluoride) in mixture of N ‐methyl‐2‐pyrrolidone (good solvent) and glycerol (weak nonsolvent) generate during simple drying step. When nanosized Al 2 O 3 filler is included the ink, uniform sub‐micrometer pore formation attained. In other words, no additional processing steps such as coagulation baths, stretching, or...

A universal approach to develop 3D printable, free-standing, and current collector-embedded electrode inks has been established.

Abstract Liquid crystalline hydrogels are an attractive class of soft materials to direct charge transport, mechanical actuation, and cell migration. When such systems contain supramolecular polymers, it is possible in principle easily shear align nanoscale structures create bulk anisotropic properties. However, reproducibly fabricating patterning aligned domains 3D remains a challenge using conventional fabrication techniques. Here, method reported for printing ionically crosslinked liquid...

Medical textiles are widely used to exert pressure on human tissues during treatment of post-surgical hematoma, burn-related wounds, chronic venous ulceration, and other maladies. However, the inability dynamically sense adjust applied often leads suboptimal application, prolonging or resulting in poor patient outcomes. Here, a simple strategy for measuring sub-bandage by integrating stretchable optomechanical fibers into elastic bandages is demonstrated. Specifically, these possess an...

Elastic metastructures provide advanced control of elastic wave propagation, particularly through their ability to exhibit frequency band gaps where waves cannot propagate. Several metastructure design strategies realize in ranges interest have emerged recent years. However, the gap frequencies are fixed at time by geometry and constituent materials. Here, a tunable metamaterial is developed which utilizes coupled magneto-mechanical response magnetoactive elastomers (MAE) enable active...

Abstract Liquid crystalline elastomers (LCEs) are widely recognized for their exceptional promise as actuating materials. Here, the comparatively less celebrated but also compelling nonlinear response of these materials to mechanical load is examined. Prior examinations planarly aligned LCEs exhibit unidirectional deformation loads. A methodology presented realize surface‐templated homeotropic orientation in and omnidirectional nonlinearity deformation. Inkjet printing alignment surface...

Abstract Research in the field of ceramic additive manufacturing (AM) has been rapidly accelerating, resulting hundreds publications and review articles recent years. While strides have made forming near‐net complex‐shaped components, challenges remain that inhibit more widespread implementation. In this perspective, we provide a meta‐analysis highlight deficiency two areas promising future directions to address remaining challenges. The first is incorporation fiber reinforcements printed...

Polyimides are widely utilized engineering polymers due to their excellent balance of mechanical, dielectric, and thermal properties. However, the manufacturing polyimides into complex multifunctional designs can be hindered by dimensional shrinkage polymer upon imidization post processing methods inability tailor electronic or mechanical In this work, we developed three-dimensional (3D) direct ink write polyimide closed-cell stochastic foams with tunable densities. These structures preserve...

Scalar fields, such as stress or temperature are often calculated in shape optimization and design problems engineering. For complex where shapes have varying topology cannot be parametrized, data-driven scalar field prediction can faster than traditional finite element methods. However, current techniques to predict fields limited a fixed grid domain, instead of arbitrary mesh structures. In this work, we propose method on meshes. It uses convolutional neural network whose feature maps at...

Direct ink writing, an extrusion‐based 3D printing method, is well suited for high‐mix low‐volume manufacturing. However, iterative approach, using random selection or constant expert guidance, still used to create printable inks and optimize parameters by expending significant amounts of time, materials, effort. Herein, a machine learning (ML) model that estimates rheology in‐situ from simple printed test pattern reported. This ML trained with rheologically diverse set composed different...

On page 3279, J. A. Lewis and co-workers demonstrate multi-material 3D printing using microfluidic printheads specifically designed for seamlessly switching between two viscoelastic materials during fabrication. This approach opens new avenues digital assembly of functional matter with controlled compositional property gradients at the microscale.

Abstract High-density electromyography (HD-EMG) can provide a natural interface to enhance human–computer interaction (HCI). This study aims demonstrate the capability of novel HD-EMG forearm sleeve equipped with up 150 electrodes capture high-resolution muscle activity, decode complex hand gestures, and estimate continuous position via joint angle predictions. Ten able-bodied participants performed 37 movements grasps while EMG was recorded using sleeve. Simultaneously, an 18-sensor motion...

Abstract Machine-learned surrogate models to accelerate lengthy computer simulations are becoming increasingly important as engineers look streamline the product design cycle. In many cases, these approaches offer ability predict relevant quantities throughout a geometry, but place constraints on form of input data. world diverse data types, preferred approach would not restrict particular structure. this paper, we propose topology-agnostic graph U-Net (TAG U-Net), convolutional network that...

Soluble oligonucleotides are typically introduced to bulk solution promote hybridization activity on DNA-functionalized surfaces. Here, an alternative approach is explored by encapsulating secondary target strands inside semipermeable colloidal satellite assemblies, then triggering their release at 37 °C for subsequent surface activity. To prepare DNA-loaded uniform gelatin microspheres fabricated using microfluidics, loaded with 15 base-long DNA targets, capped a polyelectrolyte bilayer,...

The freeform generation of active electronics can impart advanced optical, computational, or sensing capabilities to an otherwise passive construct by overcoming the geometrical and mechanical dichotomies between conventional manufacturing technologies a broad range three-dimensional (3D) systems. Previous work has demonstrated capability entirely 3D print such as photodetectors light-emitting diodes leveraging evaporation-driven multi-scale printing approach. However, evaporative patterning...

Gelatin is investigated as a matrix for temporarily encapsulating, then releasing active, short oligonucleotide stands. While most previous work has focused on using gelatin matrices with covalent crosslinks in which protease digestion triggers release of encapsulated agents, the current study involves uncrosslinked order to preserve its relevant temperature sensitivity. First, 150 µL blocks loaded fluorescently labeled DNA were investigated. Deposition poly(allylamine)–poly(acrylic acid)...

Microspheres serve as convenient substrates for studying DNA activity on surfaces. Here, in addition to employing conventional sample preparation involving multiple wash and resuspension steps prior flow cytometry measurements, we also directly sampled the reaction volume acquire situ measurements of primary competitive hybridization events. Even absence post steps, nonspecific binding events were negligible thus allowed direct, quantitative assessment they occurred colloidal The results...

A new electrostatic micromotor structure is presented in this paper. The actuation principle based on the wobbling effect due to use of direct forces. theoretical evaluation principal characteristics motor presented. designed present a low rotation speed (some 10 rotations per minute) suitable for without reduction. microfabrication technology used realize deep-etch UV lithography, nickel electroformed rotor and titanium sacrificial layer. flow chart technological steps implemented detailed....

Color-tunable photonic fibers, which reversibly change their vivid reflective coloration upon elongation, derive functionality from the use of highly stretchable elastomers in familiar structures. In article 1800293, Mathias Kolle and co-workers demonstrate how these devices can substantially improve efficiency efficacy compression therapy, by acting as easily-interpreted indicators applied pressure when integrated into elastic bandages.