A simple process for forming sub-micron gaps between horizontal and vertical electrodes in a three-dimensional micro-electrode system without the need for high-resolution lithography is described. The process is based on the enhancement of ion milling rates in metals at oblique ion incidence, which allows the preferential erosion of metal at a mesa edge. Self-aligned electrode structures are fo...

The work described here comprises the determination of Fe(III) by ion selective potentiometry using a coated-wire ion-selective electrode (CWISE) based on iron–cyclam complex. Linear Nernstian response for this electrode was obtained over the total Fe(III) concentration range of 1× 10−2 to 1× 10−6 M in 0.05 M HNO3, H2SO4, HClO4, HCl, KNO3 and KCl media, with a slope of 60± 5 mV per decade chang...

978-0-9798064-0-7/μTAS2007/$20©2007CBMS 251 Figure 1: ASV measurement of heavy metal using planar Bi electrode. (a) Pb and Cd start to deposit on the electrode at preconcentration potential; (b) deposited metals form multicomponent alloys with Bi; (c) Cd is first stripped from the electrode, and generates a peak current at its reduction potential, and (d) Pb is stripped off and generates anothe...

Metal-ion capacitors (including Li+, Na+, and K+) effectively combine a battery negative electrode capable of reversibly intercalating metal cations, together with an electrical double-layer positive electrode. However, such novel cell design has birth defect, namely kinetics mismatch between sluggish fast electrode, thus limiting the energy-power performance. Herein, we MoS2-carbon composite a...

In this chapter, we describe a resistance change technology that is based entirely on metal cation transport and redox reactions in simple two-terminal metal–electrolyte–metal/metal–insulator–metal (MEM/MIM) device structures 005B [1]. The device uses an oxidizable (soluble) active electrode, typically (but not limited to) Ag or Cu. The counter electrode is an inert (not soluble in the solid el...

Carbon film disk electrodes with Nafion coatings have been characterized by electrochemical impedance spectroscopy (EIS) with a view to a better understanding of their advantages and limitations in electroanalysis, particularly in anodic stripping voltammetry of metal ions. After initial examination by cyclic voltammetry, spectra were recorded over the full potential range in acetate buffer sol...

A silver ion-selective electrode was prepared with a polymeric membrane incorporating 2,6-bis-methylsulfanyl-[1,3,5]thiadiazine-4-thione as an ionophore, tri-n-butylphosphate (TBP) as a plasticizer and sodium tetraphenylborate (NaTPB) as an additive. The electrode exhibited a near-Nernstian response of 52 mV/decade over a wide linear concentration range of 1.0 x 10(-5) - 1.0 x 10(-1) M with a l...

a pvc ion-selective membrane electrode based on cd-tetraphenyl porphyrine as a carrier was prepared fordetermination of mno4- ion. this electrode revealed good selectivity toward permanganate ion over a widevariety of anions. effects of some experimental parameters such as nature of the plasticizer, the amounts ofcarrier and additive, and concentration of the internal solution on the potential ...

We use Monte Carlo simulations to examine the simplest model of a room-temperature ionic liquid (RTIL), called the "restricted primitive model," at a metal surface. We find that at moderately low temperatures the capacitance of the metal-RTIL interface is so large that the effective thickness of the electrostatic double layer is up to three times smaller than the ion radius. To interpret these ...