Ion-selective field effect transistors with heterogeneous membranes

Shiramizu, Bruce; Janata, Jiřı́; Moss, Stanley D.

doi:10.1016/s0003-2670(01)93052-1

Cited by 30 publications

(4 citation statements)

References 10 publications

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“…The resulting sensors were called chemically sensitive field effect transistors (CHEMFET). Initially ionic selective ISFETs made use of heterogeneous membranes of silver halides [ 6 ] and membranes based on polyvinyl chloride (PVC), exploiting the same technology developed for ISEs [ 7 , 8 ]. Later on, new materials for membrane development were explored to improve the poor adherence of PVC membranes on to the ISFET surface and the low reproducibility due to the manual patterning and deposition membrane methods.…”

Section: Introductionmentioning

confidence: 99%

“…Most of them make use of enzymatic membranes immobilised by adsorption, crosslinking with glutaraldehyde and entrapment in a polymeric membrane. Use of polymeric photocurable membranes for enzyme entrapment is advantageous since it can be patterned at wafer level in the same way as ionic sensitive membranes [ 6 , 20 ]. Those biosensors have been used mainly in environmental applications for pesticide detection.…”

Section: Introductionmentioning

confidence: 99%

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ISFET Based Microsensors for Environmental Monitoring

Jimenez-Jorquera

Orozco

Baldi

2009

Sensors

151

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The use of microsensors for in-field monitoring of environmental parameters is gaining interest due to their advantages over conventional sensors. Among them microsensors based on semiconductor technology offer additional advantages such as small size, robustness, low output impedance and rapid response. Besides, the technology used allows integration of circuitry and multiple sensors in the same substrate and accordingly they can be implemented in compact probes for particular applications e.g., in situ monitoring and/or on-line measurements. In the field of microsensors for environmental applications, Ion Selective Field Effect Transistors (ISFETs) have a special interest. They are particularly helpful for measuring pH and other ions in small volumes and they can be integrated in compact flow cells for continuous measurements. In this paper the technologies used to fabricate ISFETs and a review of the role of ISFETs in the environmental field are presented.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ISFET Based Microsensors for Environmental Monitoring

Jimenez-Jorquera

Orozco

Baldi

2009

Sensors

151

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“…In a similar fashion, deposition of AgBr [30] and AgCl [30b, 31] yield Br À and Cl À selective ISFETs, respectively. The silver salts can also be suspended in an inert polymeric membrane matrix (elastomeric poly¯uorinated polyphosphazene) on top of the gate yielding ISFETs with almost Nernstian responses for Cl À , I À , and CN À [32]. ISEs selective for Br À or I À were constructed with heterogeneous membranes made of silicone rubber [33] or poly(methyl methacrylate) [34], respectively.…”

Section: Sensors With Inorganic Salts As Selector Elementmentioning

confidence: 99%

Potentiometric Anion Selective Sensors

Antonisse

Reinhoudt²

1999

Electroanalysis

134

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In comparison with selective receptors (and sensors) for cationic species, work on the selective complexation and detection of anions is of more recent date. There are three important components for a sensor, a transducer element, a membrane material that separates the transducer element and the aqueous solution, and the receptor molecule that introduces the selectivity. This review deals with potentiometric transduction elements that convert membrane potentials into a signal. The structure and properties of membrane materials is discussed. The nature of the anion receptor ultimately determines the selectivity. Both coordination chemistry and hydrogen bonding have been used to design anion receptor molecules. The integration of all three elements by covalent linkage of all elements in durable sensorsystem concludes the review.

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“…Heterogeneous polymer membrane coated ISFETs include AgI in silicone rubber45 and mixed silver halides and silver sulfide in polyfluorinated polyphosphazene membranes. 46 Wang and Copeland23 have reported a pH sensitive polymer (stearic acid and methyl -trin-octyl ammonium stearate) coated platinum electrode, (pH response shown in Figure 4.a). Also, Simon recently reported a polymeric pH membranes This work, and much of the work of Freiser and Catrall on polymer membrane coated wire micro-electrodes52 can be directly applied to planar micro -fabricated devices.…”

Section: Agmentioning

confidence: 99%

<title>Multi-Element Thin Film Chemical Microsensors</title>

Lauks

1983

Technology of Stratified Media

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A review of the science and technology of chemical sensing using planar micro-fabricated thin film potentiometric electrodes is presented. Those aspects of technology of stratified media that are especially peculiar to this class of structures, namely fabrication of thin film composites consisting of inorganics, organics, gels and heterogeneous mixtures of these on planar electronic substrates are discussed. Problems encountered in patterning of this broad range of materials for the fabrication of chemical sensor arrays are emphasized.

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Ion-selective field effect transistors with heterogeneous membranes

Cited by 30 publications

References 10 publications

ISFET Based Microsensors for Environmental Monitoring

ISFET Based Microsensors for Environmental Monitoring

Potentiometric Anion Selective Sensors

<title>Multi-Element Thin Film Chemical Microsensors</title>

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