Conventional wisdom suggests that widely utilized self-assembled alkylthiolate monolayers on gold are too unstable to last more than several days when exposed complex fluids such as raw serum at body temperature. Demonstrated here is these can not only least 1 week under harsh conditions but significant applied value be captured for continuous electrochemical aptamer biosensors. Electrochemical biosensors provide an ideal tool investigate monolayer degradation, sensors require a tightly...

Abstract Graphene‐based composites have received attention as part of the drive towards next‐generation electronic and energy‐storage technologies. However, current graphene synthesis methods are limited by complex, time‐consuming, toxic, costly, and/or often low‐yield procedures. The a novel stretchable graphene‐polyurethane‐poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate ink aimed at printing wearable electronics is reported. procedure based on low‐cost high‐yield production...

Ammonia was produced electrochemically from nitrogen/air in aqueous alkaline electrolytes by using a Fe2O3/TiO2 composite catalyst under room temperature and atmospheric pressure. At an applied potential of 0.023 V versus reversible hydrogen electrode, the rate ammonia formation 1.25 × 10–8 mmol mg–1 s–1 at overpotential just 34 mV. This increased to 2.7 10–7 −0.577 V. The chronoamperometric experiments on Fe2O3/TiO2/C clearly confirmed that Fe2O3 along with TiO2 shows superior nitrogen...

We present a method for delivering cells to target electrodes of whole-cell bioelectronic sensor multi-parametric sensing glucose and physiological hormone regulators.

Abstract Recently, vanadium nitride (VN) was proposed as an active catalyst for a challenging electrochemical nitrogen reduction reaction (NRR) to ammonia. In this study, the stability of vanadium‐nitride in electrolyte solutions different pH values studied under selected cathodic potentials. Intensive leaching ions and constituents into bulk solution confirmed from ICP‐OES UV‐Vis results.

Controlling the interface between biological tissues and electrodes remains an important challenge for development of implantable devices in terms electroactivity, biocompatibility, long-term stability. To engineer such a biocompatible low molecular weight gel (LMWG) based on glycosylated nucleoside fluorocarbon amphiphile (GNF) was employed first time to wrap gold via noncovalent anchoring strategy, that is, self-assembly GNF at electrode surface. Scanning electron microscopy (SEM) studies...

Abstract Current methods to create 3D structures are limited few materials and designs, costly, have low processing throughput. Planar designs (of printed sacrificial, flexible, guiding layers) fabricated by thick film technique that can reversibly fold between their 2D forms through compressive buckling selective bonding is reported in this work. Versatile ink compositions based on a wide variety of (e.g., carbonaceous, polymers, nanomaterials) used along with screen printing for creating...

A bottom-up approach is proposed for the design of a fully integrated miniaturized electrochemical cell with independently addressable cylindrical macroporous electrodes. The presented strategy allows excellent control over pore size, thickness each electrode, as well their separation gap. Such coaxial architectures are potentially suitable elaboration devices such (bio)fuel cells, supercapacitors, or biosensors. As service to our authors and readers, this journal provides supporting...

Rationally designed hierarchical macro-/microporous HKUST-1 electrodes were prepared via an electrochemical deposition–dissolution technique with the motivation to overcome diffusion limitations that typically occur for conventional microporous MOFs. A colloidal crystal of silica spheres was by Langmuir–Blodgett (LB) technique. Using this as a template, macroporous copper controlled number pore layers electrodeposition. After removal synthesis performed partial anodic dissolution surface in...

Abstract To design original electrochemical devices, self‐assembly and growth processes can be coupled to create a wide range of sophisticated architectures with interesting functionalities. In this work, we present convergent strategy for the fabrication miniaturized, macroporous, coaxial two‐electrode cell tunable porosity, thickness, distance between individually addressable macroporous electrodes. The assembly presents platform that could used high‐performance devices such as...

Biofuel cells (BFCs) are electrochemical devices that rely on the transformation of chemical energy into electricity through biochemical pathways, however delivering only moderate or low power and voltage. This intrinsic limitation narrows their potential applications for driving electronics thermodynamic systems with higher demands than what can be delivered by BFCs alone. Nevertheless, coupling to electronic circuits, able raise voltage, allows circumventing these drawbacks. In this...

Abstract Redox cycling (RC) is a powerful tool capable of amplifying faradaic currents in electroanalytical measurements, thus allowing an enhancement sensitivity through fast multiple sequential oxidation and reduction reactions redox‐active analyte. Present state‐of‐the‐art RC devices are mostly based on planar electrode geometries either 2D or 3D configurations, requiring cleanroom facilities expensive microfabrication techniques. Here, the electrochemical elaboration characterization...

Conventional wisdom suggests that widely-utilized self-assembled alkylthiolate monolayers on gold are too unstable to last more than several days when exposed complex fluids such as raw serum at body temperature. Demonstrated here is these can not only least one week under harsh conditions, but significant applied value be captured for continuous electrochemical aptamer biosensors. Electrochemical biosensors provide an ideal tool investigate monolayer degradation, sensors require a...

Two electrodes in one are obtained based on a bottom-up approach leading to fully integrated microelectrochemical cell with independently addressable coaxial electrodes, as described by A. Kuhn and co-workers article 1500192. The inherent macroporosity ensures tunable high surface areas for both cylindrical thus allowing efficient transport conversion of electroactive molecules. Such architectures desirable miniaturized electrochemical devices such (bio)fuel cells, supercapacitors or biosensors.

Electrochemical biosensors promise a simple method to measure analytes for both point-of-care diagnostics and continuous, wearable biomarker monitors. In liquid environment, detecting the analyte of interest must compete with other solutes that impact background current, such as redox-active molecules, conductivity changes in biofluid, water electrolysis, electrode fouling. Multiple methods exist overcome few these challenges, but not comprehensive solution. Presented here is combined...

Bottom-Up Designed Porous Coaxial Twin-Electrodes In article number 2210638, Alexander Kuhn, and co-workers describe the redox cycling of molecules between two macroporous electrodes having a co-axial architecture. The bottom-up designed device, with easily tunable parameters, such as gap, thickness pore size individual electrodes, allows significant signal enhancement, opening interesting perspectives for development miniaturized fully integrated electrochemical (bio)sensing systems. Cover...

Due to their high specificity and selectivity, receptor-based biosensors play an important role in real-time health monitoring. However, maintaining ideal homeostatic sensor environment while correcting for the physiological variability of biofluids is imperative. Biological media contain abundance interfering species which if not addressed, can render biosensor inoperable. Enzyme-based electrochemical sensors are particularly susceptible redox-active interferences as these increase analyte...

Large scale energy storage from renewable is a critical step for development of CO 2 free modern society. Electrical conversion to chemical compound one the preferred alternatives grid leveling, photovoltaic and windmills applications. Nitrogen (N ) reduction ammonia (NH 3 being offered as an interesting approach solution, due properties which includes high density, liquefaction at relative low pressures (10 bars room temperature) availability N air. Nevertheless, slow electrochemical NH...