Tin matrix nanocomposite coatings containing ZnO and NiO nanoparticles, both individually combined, were deposited on low carbon steel substrates. The aim was to investigate the effect of reinforcement nanoparticles microstructural morphology thickness tin coatings, modification in interfacial layer between coating substrate, corrosion resistance substrate. Optical scanning electron microscopy ...

Abstract A graphite paste electrode (GPE) was obtained by immobilizing graphene, and the electrocatalytic activity of fluorene (Flu) studied. The voltammetric behavior using graphene-modified GPE showed an irreversible redox reaction for Flu-ACN-KClO 4 . good linear correlation between anodic I C Flu ranged within 8–300 ng mL −1 Therefore, we recommend a facile synthesis modified impregnated wi...

Free metal ion concentrations of amalgamating elements such as Zn, Cd, In, or Pb can be determined with absence gradients and Nernstian equilibrium stripping(AGNES) in a variety matrices, ranging from seawater to wine dissolving nanoparticles. In this hands-on paper, we review the fundamental concepts provide practical steps implement AGNES, including ready-to-run files for software controlling...

Nano-films consisting of an alternating sequence of positively and negatively charged polyelectrolyteshave been prepared by means of the electrostatic layer-by-layer sequential assembly technique on mildsteels. The mild steels were pretreated electrochemically to modify the mild steel surface. The modificationof the mild steel surface resulted in increasing the adhesion of the obtained nano-fil...

Rapid advances in the development of novel materials coupled with enhanced understanding molecular interactions are leading to interesting electrochemical biosensor technologies potential for commercialization. Reliable handheld potentiostats key requirements transformation these from laboratories point-of-care applications. Towards this end, we have developed HOME-Stat which is a handheld, ope...

Superfine pigments that consist of natural and artificial pigments and are made of mineral soil with special characteristics are used in cementitious materials for various purposes. These pigments can decrease the amount of cement needed without loss of performance and strength and also change the monotonous and turbid colours of concrete into various attractive and light colours. In this study...

The biosynthesis of the redox shuttle, phenazines, in Pseudomonas aeruginosa, an ubiquitous microorganism in wastewater microflora, is regulated by the 2-heptyl-3,4-dihydroxyquinoline (PQS) quorum-sensing system. However, PQS inhibits anaerobic growth of P. aeruginosa. We constructed a P. aeruginosa strain that produces higher concentrations of phenazines under anaerobic conditions by over-expr...

This paper describes and demonstrates a new method for determination of current density distribution in an operating polymer electrolyte membrane ~PEM! fuel cell. The technique is a modification of the current mapping technique that relies on an array of shunt resistors embedded within a current collecting plate. Standard, nonaltered membrane electrode assemblies are utilized with gas diffusion...