Boron-doped diamond electrodes and microelectrode-arrays for the measurement of sulfate and peroxodisulfate

Trace Detection of Mercury(II) Using Gold Ultra-Microelectrode Arrays

“…[17] One other type of electrode substrates are microelectrodes which offer many advantages over conventional macroelectrodes. [18] Due to their size, microelectrodes achieve an enhanced mass transport which produces i) higher current density which results in improved signal-tonoise ratios since the noise levels depend on the active area of the electrode whereas the signal depends on the total area of the diffusion field, ii) no need for convection during the deposition step and iii) the possibility to work in low ionic strength media. However, the problem is that a small current output is observed which may become problematic for trace detection.…”

Electroanalysis Utilizing Amperometric Microdisk Electrode Arrays

“…Taking advantage of the extended working potential window, Provent et al used a regular BDD array (N ¼ [86]. The reduction currents evolution for the sulfate and for the peroxidisulfate showed good linearity over the concentration range from 0 to 70 gL…”

Diamond Ultramicro- and Nano-electrode Arrays

“…The array consist of 200 micro-disks with the diameters between 25 and 30 µm and with electrode spacing of 250 µm. Rychen and coworkers [43] produced diamond ultramicroelectrode arrays by depositing a boron-doped diamond film onto patterned silicon nitrite (5 µm in thickness). The diameter of the microelectrodes is 5 µm, the distance between microelectrodes is 150 µm and the number of electrodes is 106.…”

“…for the detection of environmental analytes (e.g. nitrate, 4-nitrophenol [49][50][51], Cr(VI) ions, Ag(I) ions, sulphate, peroxodisulfate [43], hydrogen peroxide [55]), for bio-detections (e.g. detection of dopamine [44][45][46][47][48], neuronal activity measurements [52,53], quantal catecholamine secretion from chromaffine cells [54]), and for the generation and detection of peroxidisulfate with the aid of scanning electrochemical microscope (SECM) [59].…”

“…They amplify the signal of individual microelectrodes but do not lose the beneficial characteristics of individual small dimensional electrodes [1][2][3][4]. Several works have been conducted on the fabrication, characterization, and applications of diamond micro-, ultramicro-, and nano-electrode arrays/ensembles [42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57]. For example, they have been applied for sensor applications [49][50][51][52][53][54][55].…”