In light of multiple events over the last decade, there is a clear need for new and more sensitive methods of detecting explosives, especially those made by easily available materials. In fact, it was this kind of threat that lead to the banning of liquids in containers larger than 3 ounces on flights in the United States and most of the world. Triacetone triperoxide (TATP) is one of these expl...

Prussian Blue films were electrogenerated on a Pt disc electrode and color changes studied by digital video electrochemistry together with cyclic voltammetry. Three systems of peaks detected. Peaks corresponding to the reduction Everitt's Salt form oxidation Yellow are well related expressed as intensities derivatives. Color showed that these involved complexes mechanisms intermediate species T...

A definitive method is described for the indirect assay of several tens of milligrams of urea by coulometric titration. Urea was decomposed in concentrated sulfuric acid using a Kjeldahl flask. Subsequently, the formed ammonium ion was titrated with electrogenerated hypobromite ion in a sodium bromide-sodium tetraborate medium of pH 8.6, with amperometric end-point detection. Parameters affecti...

We demonstrate a novel and powerful method to study electrogenerated chemiluminescence (ECL) of single nanoparticles (NPs) (r = 25 +/- 15 nm) of a conjugated polymer, F8BT, on an ITO electrode in the presence of a co-reactant, such as tri-n-propylamine (TPrAH) in acetonitrile solution. The results reveal that the maximum formation rate of ECL of individual NPs is achieved after a long "build-up...

Electrogenerated chemiluminescence (ECL) at a scanning electrochemical microscope (SECM) tip as the tip was moved in the vicinity of insulating and conductive substrates was studied either by ion annihilation or with a coreactant. The SECM/ECL approach curves (intensity vs tip-substrate distance, d) with both insulating and conducting substrates showed a decrease in ECL intensity with a decreas...

A controlled architecture of nanoelectrodes, of a similar size to small molecule-binding aptamers, is synthesized inside nanoporous alumina. Gold nanoparticles with a controlled size (about 2 nm) are electrogenerated in the alumina cavities, showing a fast electron transfer process toward ferrocyanide. These uncapped nanoparticles are easily modified with a thiol-containing aptamer for label-fr...

Bipolar electrodes are potentially useful for a variety of sensing applications, but their implementation has been hampered by an inability to easily monitor the current through such electrodes. However, current can be indirectly determined using electrogenerated chemiluminescence (ECL) as a reporting mechanism. This paper provides a detailed theoretical analysis of ECL reporting at bipolar ele...