The successful commercialization of smart wearable garments is hindered by the lack fully integrated carbon-based energy storage devices into wearables. Since electrodes are active components that determine performance systems, it important to rationally design and engineer hierarchical architectures atboth nano- macroscale can enjoy all necessary requirements for a perfect electrode. Here we demonstrate large-scale flexible fabrication highly porous high-performance multifunctional graphene...

Ultra-large graphene oxide sheets exhibit unique viscoelastic properties, making them a new class of soft material. We provide fundamental insights enabling development various fabrication techniques utilizing this 2D

A scaled-up fiber wet-spinning production of electrically conductive and highly stretchable PU/PEDOT:PSS fibers is demonstrated for the first time. The possess mechanical properties appropriate knitting various textile structures. knitted textiles exhibit strain sensing that were dependent upon number used in knitting. show sensitivity (as measured by gauge factor) increases with deployed. stable sensor response was observed when four co-knitted a commercial Spandex yarn. can distinguish...

It is a challenge to retain the high stretchability of an elastomer when used in polymer composites. Likewise, conductivity organic conductors typically compromised as filler composite systems. Here, it possible achieve elastomeric fiber composites with electrical at relatively low loading conductor and, more importantly, attain mechanical properties that are useful strain‐sensing applications. The preparation homogenous formulations from poly­urethane (PU) and...

Recent advances in wearable electronics, technical textiles, and strain sensing devices have resulted extensive research on stretchable electrically conductive fibers. Addressing these areas require the development of efficient fiber processing methodologies that do not compromise mechanical properties polymer (typically an elastomer) when nanomaterials are added as fillers. It is highly desirable addition fillers provides only electrical conductivity, but also enhance stiffness, strength,...

Abstract A simplified wet‐spinning process for the production of continuous poly (3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) fibers is reported. Conductivity enhancement PEDOT:PSS up to 223 S cm −1 has been demonstrated when these are exposed ethylene glycol as a post‐synthesis processing step. In new spinning approach it shown that by employing formulation consisting an aqueous blend and poly(ethlylene glycol), need post‐spinning treatment with eliminated. With this...

He'll weld with a mighty hand. Flash-welded polyaniline nanofiber actuators demonstrate unprecedented reversible, rapid actuation upon doping. An intense flash of light creates an asymmetric structure (see figure) thin dense layer on top thick porous nanofibrillar layer. On exposure to camphor sulfonic acid the film curls more than 720°.

Quartz crystal microbalance with dissipation monitoring (QCM-D) was employed to characterize the adsorption of model proteins, bovine serum albumin (BSA) and fibronectin (FN), polypyrrole doped dextran sulfate (PPy-DS) as a function DS loading surface roughness. BSA greater on surfaces increased roughness above what could be explained by increase in area alone. Furthermore, additional mass adsorbed rough films concomitant an rigidity protein layer. Analysis dynamic viscoelastic properties...

A simple fiber spinning method used to fabricate elastomeric composite fibers with outstanding mechanical performance is demonstrated. By taking advantage of the large size as‐prepared graphene oxide sheets (in order tens micrometers) and their liquid crystalline behavior, low strain properties have been fabricated without compromising high properties. For example, modulus yield stress parent elastomer improved by 80‐ 40‐fold, respectively, while maintaining extensibility ∼400% inherent...

A relative lack of printable materials with tailored functional properties limits the applicability three-dimensional (3D) printing. In this work, a diamond–acrylonitrile butadiene styrene (ABS) composite filament for use in 3D printing was created through incorporation high-pressure and high-temperature (HPHT) synthetic microdiamonds as filler. Homogenously distributed diamond filaments, containing either 37.5 or 60 wt % microdiamonds, were formed preblending powder ABS, followed by...

Printing has been widely used in the sensor industry for its speed, low cost and production scalability. In this work we present a wholly-printed polypyrrole (PPy) based biosensor produced by inkjet printing bioinks composed of dispersions PPy nanoparticles enzymes onto screen-printed carbon electrodes. Two enzymes, horseradish peroxidase (HRP) or glucose oxidase (GoD) were incorporated into nanoparticle to impart biosensing functionality selectivity conducting polymer ink. Further was also...

Synthetic micro-diamond-polydimethylsiloxane (PDMS) composite microfluidic chips and thin films were produced using indirect 3D printing spin coating fabrication techniques. Microfluidic containing up to 60 wt% micro-diamond successfully cast bonded. Physicochemical properties, including the dispersion pattern, hydrophobicity, chemical structure, elasticity thermal characteristics of both chip investigated. Scanning electron microscopy indicated that particles embedded interconnected within...

Electrically conductive elastomeric fibres prepared using a wet-spinning process are promising materials for intelligent textiles, in particular as strain sensing component of the fabric. However, these fibres, when reinforced with conducting fillers, typically result compromise between mechanical and electrical properties and, ultimately, functionality. Here we investigate polyurethane (PU) range fillers such carbon black (CB), single-walled nanotubes (SWCNTs), chemically converted...

A facile one-step method was used to create a selective and sensitive electrode for dopamine (DA) detection based upon stainless steel (SS) filament substrate reduced graphene oxide (rGO). The successfully selectively detects DA in the presence of uric acid ascorbic without need Nafion coating. proposed is easy fabricate, low-cost, flexible, strong. rGO-SS could also be incorporated into three-dimensional braided structure enabling two-electrode fiber system. sensor an excellent candidate...

The electromechanical actuation properties of polypyrrole have been utilized in the design and development a low voltage fluid movement system for microfluidic channels. A confined concentric arrangement actuators is used to induce through an inner channel single unit. Series connection these units appropriate electrical connection/stimulation induces novel peristaltic action that enables fluids be pumped predetermined direction. Flow rates up 2.5 µl min−1 can achieved against back pressure...

The properties of two forms polyaniline (PAni) synthesised under acidic and basic conditions have been investigated both individually as combined complexes. PAni polymerised within alkaline media was redox inactive non-conducting while the emeraldine salt (ES) electroactive conducting. Raman, electron spin resonance, UV-Vis fluorescence spectroscopies were used to monitor changes in electronic these conducting polymer composites. Solution cast films (A-PAni) with ES resulted an increase high...

Chiral polyaniline colloids have been generated via the electrohydrodynamic polymerization of aniline in aqueous (+)- or (−)-10-camphorsulfonic acid (HCSA) using polystyrene sulfonate (PSS) as a steric stabilizer and codopant. Potentiostatic at +0.9 V (vs Ag/AgCl) was employed. The colloidal PAn·HCSA/PSS dispersions produced after various electropolymerization periods (30−90 min) became optically active upon aging over 24 h, revealing mirror-imaged circular dichroism (CD) spectra for...

The use of nanostructured carbon materials as electrodes for energy storage and conversion is an expanding area research in recent years. Herein, platinum nanoparticles have been deposited onto both multi-walled single-walled nanotubes (CNTs) via a microwave assisted polyol reduction method. This interaction has probed with electron paramagnetic resonance (EPR) Raman spectroscopies to elucidate the charge/electron transfer interactions between Pt CNTs. Observed shifts g factors CNTs are...

In vivo host responses to an electrode-like array of aligned carbon nanotubes (ACNTs) embedded within a biopolymer sheet are reported. This biocompatibility study assesses the suitability immobilized for bionic devices. Inflammatory and foreign-body histiocytic reactions not substantially elevated when compared negative controls following 12 weeks implantation. A fibrous capsule isolates implanted ACNTs from surrounding muscle tissue. Filamentous nanotube fragments engulfed by macrophages,...

Before conducting polymers can be employed in many applications, some of the intrinsic properties these materials need to better understood. An overview research and development being undertaken at UTS is presented. Because are difficult process once fabricated, an understanding synthesis parameters use techniques pro duce polymer films with desired upmost importance. Descriptions galvanostatic potentiostatic produce polyheterocyclics Thermal such as thermal diffusivity, ther mal...