Construction of submicrometer voltammetric electrodes

A Random Walk through Electron-Transfer Kinetics

“…Over the past decade, several research groups have reported the fabrication of platinum electrodes (disk or quasihemisphere geometry) with radii as small as 10 nm (6)(7)(8)(9)(10)(11)(12) Although Equation 1 is useful in predicting the onset of kinetic control, its physical interpretation is somewhat paradoxical. When an electrode reaction is controlled by electrontransfer kinetics, that is, D/a > k et , the rate of the electron-transfer reaction is determined by the collision frequency of redox molecules with the electrode surface and the probability of electron transfer per collision.…”

Métodos para fabricação de microeletrodos visando a detecção em microambientes

“…Estes instrumentos funcionam à base de aquecimento do capilar de vidro com resistências elétricas ou por laser [31][32][33] . Este último método possui vantagens, pois permite um controle mais apurado do aquecimento.…”

Intracellular Voltammetry at Ultrasmall Platinum Electrodes

“…Recently, Pendley and Abruna [24] reported the construction of submicron platinum disk electrodes by pulling glass pipets to encase a very fine platinum wire. Also, Penner et al [25] In this paper, we report procedures to construct and characterize structurally small platinum ring electrodes.…”