Nanopore-enabled electrode arrays and ensembles

Zaino, Lawrence P.; Ma, Chaoxiong; Bohn, Paul W.

doi:10.1007/s00604-015-1701-7

Cited by 19 publications

(15 citation statements)

References 116 publications

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“…First, the nanoband electrode ( Fig. 1A ) 20 and electrode array were made by using bottom-up manufacturing technologies including photolithography, electron beam lithography (EBL) and focused ion beam (FIB) fabrication, 21 in which a metal layer was deposited on the top, bottom or sandwiched in-between the substrates. These methods could provide arrays or ensembles of nanoelectrodes.…”

Section: Fabrication Of Nanoelectrodesmentioning

confidence: 99%

Advanced electroanalytical chemistry at nanoelectrodes

et al. 2017

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Section: Fabrication Of Nanoelectrodesmentioning

confidence: 99%

Advanced electroanalytical chemistry at nanoelectrodes

et al. 2017

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“…Nanogap devices encompass various designs such as: nanocavities, [39][40][41][42][43] ring-disk electrodes, 44,45 and nanopore electrodes. 46,47 Using ring-disk electrodes defined by a metallized nanoporous membrane, Bohn and coworkers were able to show a 30fold current amplification. 45 In IDEs, employed in this work, redox cycling takes place in the gap between closely spaced microbands (Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

Redox Cycling at an Array of Interdigitated Bipolar Electrodes for Enhanced Sensitivity in Biosensing**

et al. 2021

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An array of many bipolar electrodes (BPEs) can be controlled by a single pair of driving electrodes yet allows for multiplexed analysis of many individual biomarkers or single cells at once. A wide range of bipolar electrochemical sensors have been devised, many of which operate under battery power and produce visible signals (e.g., luminescent, electrochromic) appropriate for smartphone or naked eye readout. These features of BPEs are advantageous in the context of clinical and environmental sensing applications at the point of need. However, the sensitivity of BPEs is poor in comparison to direct measurement of current at an individual electrode, and therefore, the enhancement of signals obtained at BPEs is an active area of research. Here, we describe signal amplification by redox cycling accomplished by interdigitation of each BPE in an array with a shared driving electrode. We evaluate amplification obtained for interelectrode spacing in the range of 35 m to 15 m. Each interdigitated BPE (IDBPE) in the array has an independent, reproducible, and linear response to a reversible electroactive analyte. Therefore, this universal amplification strategy allows for multiplexed or spatially resolved sensing in point-of-need applications.

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“…The fabrication of nanoelectrode ensembles and arrays has gained increasing interest in development of highly sensitive and miniaturized electrochemical devices and sensors. 1 a Template synthesis of nanoporous membranes is an important pathway for the fabrication of ensembles of nanoscopic electrodes ( e.g. , metal nanotube membranes) towards ion-permselective membrane.…”

Section: Introductionmentioning

confidence: 99%