Abstract The work describes the development of a flexible, hydrogel embedded pH-sensor that can be integrated in inexpensive wearable and non-invasive devices at epidermal level for electrochemical quantification H + ions sweat. Such device useful swift, real time diagnosis monitoring specific conditions. sensors’ working electrodes are flexible poly(methyl methacrylate) electrospun fibers coated with thin gold layer electrochemically functionalized nanostructured palladium/palladium oxide....

The development of soft actuators by using inexpensive raw materials and straightforward fabrication techniques, aiming at creating developing muscle like micromanipulators, represents an important challenge nowadays. Providing such devices with biomimetic qualities, for example, sensing different external stimuli, adds even more complexity to the task. We developed electroactive polymer-coated microribbons that undergo conformational changes in response physical chemical parameters. These...

Abstract Staggered gap radial heterojunctions based on ZnO-Cu x O core-shell nanowires are used as water stable photocatalysts to harvest solar energy for pollutants removal. ZnO with a wurtzite crystalline structure and band of approximately 3.3 eV obtained by thermal oxidation in air. These covered an amorphous Cu layer having 1.74 subsequently form heterojunctions. The electrical characterization the pristine emphasizes charge transfer phenomena at junction interface between solutions....

This paper proposes a novel, flexible, low cost administration patch which could be used as non-invasive, controlled transdermal drug delivery system. The fabricated device consists in flexible microfiber architecture heater covered with thermoresponsive hydrogel, namely poly(N-isopropylacrylamide), matrix for the incorporation of active molecules. manufacturing process two main steps. First, electrospun poly(methyl methacrylate) fiber networks are sputter coated thin gold layer and attached...

Biopolymers provide versatile platforms for designing naturally-derived wound care dressings through eco-friendly pathways. Eggshell membrane (ESM), a widely available, biocompatible biopolymer based structure features unique 3D porous interwoven fibrous protein network. The ESM was functionalized with inorganic compounds (Ag, ZnO, CuO used either separately or combined) using straightforward deposition technique namely radio frequency magnetron sputtering. ESMs were characterized from...

Abstract A non-conventional, bioinspired device based on polypyrrole coated electrospun fibrous microstructures, which simultaneously works as artificial muscle and mechanical sensor is reported. Fibrous morphology preferred due to its high active surface can improve the actuation/sensing properties, preparation still being challenging. Thus, a simple fabrication algorithm electrospinning, sputtering deposition electrochemical polymerization produced electroactive aligned ribbon meshes with...

Eggshell membranes were employed as biological scaffolds for developing soft and versatile actuators. A particular architecture, consisting of eggshell membrane coated with polypyrrole, has been fabricated found to be a green, inexpensive, lightweight, easy handle class The polypyrrole-coated devices tested in liquid, ambient atmosphere controlled humidity environment, the recorded movements proving their versatility. In 1 M NaCl aqueous solution, by applying successive potential pulses,...

Embedding electronic and optoelectronic devices in common, daily use objects is a fast developing field of research. New architectures are needed for migrating from the classic wafer- based substrates. Novel types flexible PMMA/Au/Alq3/LiF/Al structures were obtained starting electrospun polymer fibers. Thus, using an electrospinning process poly (methyl metacrylate) (PMMA) nanofibers fabricated. A thin Au layer deposition rendered fiber array conductive, this being further employed as...

Core–double shell nylon-ZnO/polypyrrole electrospun nanofibers were fabricated by combining three straightforward methods (electrospinning, sol–gel synthesis and electrodeposition). The hybrid fibrous organic–inorganic nanocomposite was obtained starting from freestanding nylon 6/6 through electrospinning. Nylon meshes functionalized with a very thin, continuous ZnO film process thermally treated in order to increase its crystallinity. Further, the coated networks used as working electrode...

Abstract Designing complex electrochemical artificial muscles aims towards novel devices which besides excellent actuation capabilities should also present the ability to self-sense modification of environmental parameters. In order improve efficiency, mimicking structure natural muscles, synthetic actuators have a similar fibrillary morphology. The importance using materials based on fiber building blocks in aimed at soft robotics field was demonstrated report by comparing muscle with one...

Abstract Electrospun nanofibres based on poly(styrene sulfonate) doped poly(3,4-ethylenedioxythiophene) (PEDOT:PSS) were fabricated using a straightforward procedure which combines electrospinning, sputtering deposition and electrochemical synthesis. In general, electrospun fibre meshes conducting polymers are prepared by mixing the polymer with carrier or chemically coverage of fibres. contrast, freestanding nylon 6/6 nanofibre webs through electrospinning coated gold in order to make them...

The present work reports a new configuration of soft artificial muscle based on web metal covered nylon 6/6 micrometric fibers attached to thin polydimethylsiloxane (PDMS) film. preparation process is simple and implies the attachment metalized fiber networks PDMS sheet substrate while heating applying compression. resulting composite versatile can be cut in different shapes as function application sought. When an electric current passes through metallic web, heat produced, leading local...

The present work reports the synthesis and characterization of polycaprolactone fibers loaded with particulate calcium magnesium silicates, to form composite materials bioresorbable bioactive properties. inorganic powders were achieved through a sol–gel method, starting from compositions diopside, akermanite, merwinite, three mineral phases suitable features for field hard tissue engineering. fibrous composites fabricated by electrospinning polymeric solutions content 16% 5 or 10% powder....

The importance of multifunctional smart medical devices increases constantly during the last decades, fuelled by socio - economic challenges such as population aging and high costs healthcare system. Consequently, numerous research teams are focused on developing with multiple functionalities in terms both diagnostic therapeutical approaches.Wearables become ubiquitous since computing communication got smaller more powerful, new functions being added to consumer products watches or fitness...

Abstract Artificial muscles comprise a bunch of materials, composites and devices performing similar behavior to biological muscles, since mechanical actuation is produced while consuming certain amount energy. However, in order mimic the multiple simultaneous functionalities natural i.e. proprioception, new should be designed. A non-conventional, bioinspired device based on polypyrrole coated electrospun fibrous microstructures, which works simultaneously as artificial muscle sensor...