A new interdigitated array microelectrode-oxide-silicon sensor with label-free, high sensitivity and specificity for fast bacteria detection

Tang, Xiaohui; Flandre, Denis; Raskin, Jean‐Pierre; Nizet, Yannick; Hagelsieb, Luis Moreno; Pampin, Rémi; Francis, Laurent

doi:10.1016/j.snb.2011.02.002

Cited by 44 publications

(12 citation statements)

References 31 publications

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“…The 30 nm-thick Al 2 O 3 layer protects the underlying aluminum from corrosion and has a moderate impact on bacterial sensitivity, compared to a micrometer-sized oxide layer. As a 80 nm electrochemically-anodized Al 2 O 3 layer has previously been demonstrated for bacterial detection in dried conditions (Tang et al, 2011), this paper extends the use of this type of passivated electrodes to detection in liquid.…”

Section: Introductionmentioning

confidence: 84%

Lytic enzymes as selectivity means for label-free, microfluidic and impedimetric detection of whole-cell bacteria using ALD-Al2O3 passivated microelectrodes

Couniot

Vanzieleghem

Rasson

et al. 2015

Biosensors and Bioelectronics

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Section: Introductionmentioning

confidence: 84%

Lytic enzymes as selectivity means for label-free, microfluidic and impedimetric detection of whole-cell bacteria using ALD-Al2O3 passivated microelectrodes

Couniot

Vanzieleghem

Rasson

et al. 2015

Biosensors and Bioelectronics

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“…The impedance analysis of the sensors was realised in air to avoid an additional capacitive signal of the solution . Moreover, solutions were avoided to prevent a detachment of the spores.…”

Section: Resultsmentioning

confidence: 99%

“…Several approaches, in which impedance analyses are applied to enumerate/detect bacterial load or growth, have been reported in literature . Also various commercial systems (Bactometer ® , Malthus ® systems, RABIT ® , Bac‐Trac ® ) are available on the market, which are based on impedance measurements to study the bacterial load .…”

Section: Introductionmentioning

confidence: 99%

Towards a biosensor to monitor the sterilisation efficiency of aseptic filling machines

Oberländer

Bromm

Wendeler

et al. 2015

Physica Status Solidi (a)

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Sterilisation processes are compulsory in medicine, pharmacy, and food industries to prevent infections of consumers and microbiological contaminations of products. Monitoring the sterilisation by conventional microbiological methods is time‐ and lab‐consuming. To overcome this problem, in this work a novel biosensor has been proposed. The sensor enables a fast method to evaluate sterilisation processes. By means of thin‐film technology the sensor's transducer structures in form of IDEs (interdigitated electrodes) have been fabricated on a silicon substrate. Physical characterisation of the developed sensor was done by AFM, SEM, and profilometry. Impedance analyses were conducted for the electrical characterisation. As microbiological layer spores of B. atrophaeus have been immobilised on the sensing structure; spores of this type are a well‐known sterilisation test organism. Impedance measurements at a fixed frequency over time were performed to monitor the immobilisation process. A sterilisation process according to aseptic filling machines was applied to demonstrate the sensor functionality. After both, immobilisation and sterilisation, a change in impedance could successfully be detected.

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“…However, there is also a multiple finger device design which is called interdigitated micro electrodes having higher capacitance because of bigger area of electrodes. These devices also have lots of applications in combination with other techniques [10].…”

Section: Electrode Fabricationmentioning

confidence: 99%

Capacitive Solvent Sensing with Microfluidics Chip

Bilican

Güler

2018

SDÜ Fen Bil Enst Der

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Solvents are widely used in daily life as well as in almost all laboratories. Identification and detection of these solvents used in many areas have great importance in terms of health, toxicology and environment. For this reason, the main purpose of our study is to be able to identify the solvents in practical ways. In this study, gold microelectrodes were used to define the capacitance detection of various solvents in the frequency range of 20 kHz -2 MHz. Moreover, the electrical noise and signal output of the solvents at different frequencies were investigated. Measurements were made by micro-channels integrated on microelectrodes for reducing noises and detection with high sensibility.

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A new interdigitated array microelectrode-oxide-silicon sensor with label-free, high sensitivity and specificity for fast bacteria detection

Cited by 44 publications

References 31 publications

Lytic enzymes as selectivity means for label-free, microfluidic and impedimetric detection of whole-cell bacteria using ALD-Al2O3 passivated microelectrodes

Lytic enzymes as selectivity means for label-free, microfluidic and impedimetric detection of whole-cell bacteria using ALD-Al2O3 passivated microelectrodes

Towards a biosensor to monitor the sterilisation efficiency of aseptic filling machines

Capacitive Solvent Sensing with Microfluidics Chip

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