Electronics

Adaptive Backbone Based Cooperative Caching in Mobile Ad hoc Networks
Existing cooperative caching algorithms for mobile ad hoc networks face serious challenges due to message overhead and scalability issues. To solve these issues, we propose an adaptive virtual backbone based cooperative caching that uses a connective dominating set (CDS) to find the desired location of cached data. Message overhead in cooperative caching is mainly due to cache lookup process us...


High performance all-solid-state lithium/sulfur batteries using lithium argyrodite electrolyte
Among the known fast Li+ ion conducting solids, thiophosphates and especially lithium argyrodites Li6PS5X (X = Cl, Br) exhibit a great potential due to their high ionic conductivities and electrochemical stability. Here, we prepare all-solid-state lithium secondary batteries combining sulfur as the active cathode material with argyrodite-type Li6PS5Br as the solid electrolyte. Composite cat...
Effect of radio frequency power and thickness on the electrochemical properties of Li 2−x MnO 3−y thin films
In the present work, Li2−xMnO3−y (LMO) thin films have been deposited by radio frequency (RF) reactive magnetron sputtering using acid-treated Li2MnO3 powder target. Systematic investigations have been carried out to study the effect of RF power on the physicochemical properties of LMO thin films deposited on platinized silicon substrates. X-ray diffraction, electron microscopy, surface che...


Thermodynamic studies of anion adsorption at the Pt(111) electrode surface from glycolic acid solutions
Kinetic glycolic acid (GA) oxidation and thermodynamic glycolate adsorption have been studied on Pt single crystal electrodes. The voltammetric profiles of Pt(111), Pt(100), and Pt(110) in 0.1 M GA are shown, and the effect of the inclusion of steps on the Pt(111) surface has been studied by cyclic voltammetry. For Pt(111) electrode, different concentrations and sweep rates have been applied, ...
Thin film-modified electrodes: a model for the charge transfer resistance in electrochemical impedance spectroscopy
A simple but general model is derived for the charge transfer resistance for a solution phase redox couple reacting at an electrode modified with a thin film such as a self-assembled monolayer. The layer itself is non-electroactive but changes the impedance response by virtue of altering the solubilities and diffusion coefficients of the electroactive species within the layer as compared to bul...


Effects of pre-carbonization on the structure and performance of hard carbon in lithium cells
The amount of lithium reversibly incorporated in the hard carbon (the reversible capacity), the faradic losses during the first charge–discharge cycle (the irreversible capacity), and the profile of the voltage curves all depend on the structure, the texture, and the heteroatom content which are affected significantly by fabrication method of hard carbon material. We demonstrate herein a simp...
Preparation and stability study of potassium ferrate (VI) coated with phthalocyanine for alkaline super-iron battery
The potassium ferrate (VI) coated with phthalocyanine (H2Pc) was successfully prepared via a facile co-precipitation process. Scanning electron microscopy and Fourier transform infrared spectrum revealed that K2FeO4 had been coated with H2Pc particles. When evaluated as cathodic material for alkaline super-ion battery, the effects of H2Pc coating on the electrochemical stability of K2FeO4 elect...

Construction of a non-enzymatic glucose sensor based on copper nanoparticles/poly( o -phenylenediamine) nanocomposites
An electrochemical non-enzymatic glucose sensor was fabricated by electrodeposition of copper nanoparticles (CuNPs) onto a poly(o-phenylenediamine) (PoPD) film-modified glassy carbon electrode (CuNPs/PoPD/GCE). We had studied some factors such as the pH value of supporting electrolyte, the amount of PoPD and applied potentials and optimize the experiment conditions. Under the optimum conditions...
Seeker—Autonomous Long-range Rover Navigation for Remote Exploration
Under the umbrella of the European Space Agency (ESA) StarTiger program, a rapid prototyping study called Seeker was initiated. A range of partners from space and nonspace sectors were brought together to develop a prototype Mars rover system capable of autonomously exploring several kilometers of highly representative Mars terrain over a three-day period. This paper reports on our approach and...

Highly Efficient Membraneless Glucose Bioanode Based on Corynascus thermophilus Cellobiose Dehydrogenase on Aryl Diazonium-Activated Single-Walled Carbon Nanotubes
We present an approach for electrode modification by using the oxidoreductase cellobiose dehydrogenase from the ascomycete Corynascus thermophilus (CtCDH). CtCDH is a two-domain enzyme, in which the catalytic dehydrogenase domain (DHCDH) hosts flavin adenine dinucleotide (FAD) as cofactor and is connected through a flexible linker to a small cytochrome domain with a heme b cofactor (CYTCDH). Th...
Enhanced Electron Transfer in Enzymatic Bioelectrodes by a Poly(vinyl alcohol) N-Methyl-4(4′-formylstyryl) Pyridinium Methosulfate Acetal Cationic Polymer
A novel method for enzyme immobilization has been developed for use in enzymatic biofuel cell cathodes and anodes. Enzyme immobilization was achieved on a glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes (MWNTs) using the freestanding cationic polymer poly(vinyl alcohol) N-methyl-4(4′-formylstyryl) pyridiniummethosulfateacetal (PVA-SbQ). The enzymes entrapped within t...

In Situ Tetraethoxysilane-Templated Porous Ba0.5Sr0.5Co0.8Fe0.2O3−δ Perovskite for the Oxygen Evolution Reaction
The perovskite Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) is one of the best catalysts for the oxygen evolution reaction (OER), which is critical to many energy-storage applications. However, the catalytic activity of BSCF perovskites is constrained by a low specific surface area (0.5 m2 g−1). We report here, for the first time, a facile, in situ template method using tetraethoxysilane (TEOS) to ...
Water Oxidation at Electrodes Modified with Earth-Abundant Transition-Metal Catalysts
A broad and critical description of the state-of-the-art in water oxidation electrocatalysts for the oxygen-evolving reaction is given. Technologically relevant catalysts for energy production from earth-abundant metals are highlighted. Cracking the problem? A critical description of the state-of-the art in water oxidation electrocatalysts under heterogeneous conditions is presented. Their tech...
Low-frequency photonic bands in metallic lattices: a tight-binding description
Low-frequency photonic band structures in two-dimensional metallic lattices are investigated through both numerical and tight-binding approaches. The metallic structures, displaying respectively four and six fold rotational symmetries, are constructed upon different sets of adjustable structure units, allowing probing the contribution of different structure configurations to the band formation....
Inverse-rib hybrid plasmonic waveguide for low-loss deep sub-wavelength surface plasmon polariton propagation
We propose an inverse-rib plasmonic waveguide which is more realistic and easy-to-fabricate to provide a more realistic image of previously proposed waveguides and simplified fabrication processes. It is shown that despite major changes in the structure, this waveguide provides optical properties comparable to previously proposed ones in (uplambda =1.55,upmu hbox {m}) telecommunication waveleng...