Ion-selective field effect transistors with polymeric membranes

Mcbride, Paul T.; Janata, Jiřı́; Comte, Pierre A.; Moss, Stanley D.; Johnson, Christine

doi:10.1016/s0003-2670(01)93360-4

Cited by 71 publications

(33 citation statements)

References 11 publications

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“…[25,26,27] For such sensing experiments, the oxide surface needs to be modified to specifically detect the targeted species. Besides ionselective membranes [28,9], self-assembled monolayers (SAMs) of functional molecules have been used for this purpose. In the case of oxide surfaces, the self-assembly of silane monolayers has become a widely used method for functionalization [6,3,10,17] in which surface hydroxyl groups are replaced by new functional groups.…”

Section: Introductionmentioning

confidence: 99%

Competing surface reactions limiting the performance of ion-sensitive field-effect transistors

Stoop

Wipf

Müller

et al. 2015

Sensors and Actuators B: Chemical

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Ion-sensitive field-effect transistors based on silicon nanowires are promising candidates for the detection of chemical and biochemical species. These devices have been established as pH sensors thanks to the large number of surface hydroxyl groups at the gate dielectrics which makes them intrinsically sensitive to protons. To specifically detect species other than protons, the sensor surface needs to be modified. However, the remaining hydroxyl groups after functionalization may still limit the sensor response to the targeted species.Here, we describe the influence of competing reactions on the measured response using monolayer of calcium-sensitive molecules. We identify the residual pH response as the key parameter limiting the sensor response. The competing effect of pH or any other relevant reaction at the sensor surface has therefore to be included to quantitatively understand the sensor response and prevent misleading interpretations.

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Section: Introductionmentioning

confidence: 99%

Competing surface reactions limiting the performance of ion-sensitive field-effect transistors

Stoop

Wipf

Müller

et al. 2015

Sensors and Actuators B: Chemical

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“…Due to this, there has been much attention in the development of various types of solid-state electrochemical sensors (i.e., ion, gas, and biosensors), in which polymer membranes are cast on the solid surfaces without any internal reference electrolyte solution [3][4][5][6]. Such devices could offer the advantages of miniaturization (for in vivo measurements), the capability of including multiple sensors on a single chips and mass fabrication for cost reduction.…”

Section: Introductionmentioning

confidence: 99%

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

Piao

Yoon

Jeon

et al. 2003

Sensors

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Hydrogen ion selective membranes formulated with 3140 RTV silicone rubber (SR) in PVC were studied to extend the life time of solid state ion sensors through improved membrane adhesion. All solid state hydrogen ion selective electrodes were prepared by incorporation of tridodecyl amine (TDDA) as an ionophore, potassium tetrakis[3,5-bis(pchlorophenyl)borate (KTpClPB) as a lipophilic additive, bis(2-ethylhexyl)adipate (DOA) as a plasticizer. Their linear dynamic range was pH 2.0-11.0 and showed the near Nernstian slope of 55.1±0.2 mV/pH (r=0.999). The influences from alkali and alkaline earth metal ions were studied for the response of the final ISE membrane composition. Impedance spectroscopic data showed that the resistance was increased by increasing SR content in PVC. Brewster Angle Microscopy (BAM) image showed clear differences according to the SR compositions in PVC. Life time of the all solid state membrane electrode was extended to about 2 months by preparing the membrane with PVC and SR. The standard reference material from NIST (2181 HEPES Free acid and 2182 NaHEPESate) was tested for the ISE and it gave a good result.

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“…The theoretical chemical response of an ISFET is the same as that of an ion-selective electrode except that an ISFET does not have an internal solution, and the membrane is directly on the solid surface of the field effect transistor. Subsequent research was reported on the development of ISFETs to measure different ionic species including calcium, potassium, sodium, and ammonium ions (Matsuo and Wise, 1974;Moss et al, 1975;Janata and Moss, 1976;Moss et al, 1978;McBride et al, 1978;Ramsing et al, 1980;Oesch et al, 1981). Soon other researchers were developing multiple sensor modules with integrated signal conditioning to buffer and amplify the signal, including in some cases, automatic temperature compensation (Sibbald et al, 1984;Brown et al, 1985;Fung and Fu, 1985;Lauks et al, 1985).…”

Section: Introductionmentioning

confidence: 99%

Real-time multi ISFET/FIA soil analysis system with automatic sample extraction

Birrell

Hummel

2001

Computers and Electronics in Agriculture

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Successful implementation of site-specific crop management relies on accurate quantification of spatial variation of important factors. Therefore, there is a tremendous need for the development of sensing technologies that will allow automated collection of soil, crop and pest data, to more accurately characterize within-field variability. The objective of this work was to develop an integrated multi-sensor soil analysis system. Ion-selective field effect transistor (ISFET) technology was coupled with flow injection analysis (FIA) to produce a real-time soil analysis system. Testing of the ISFET/ FIA system for soil analysis was carried out in two stages: (1) using manually extracted samples, and (2) the soil to be analysed was placed in the automated soil extraction system, and the extracted solution fed directly into the FIA system. The sensor was successful in measuring soil nitrates in manually extracted soil solutions (r 2 >0.9). The rapid response of the system allowed a sample to be analysed in 1.25 s, which is satisfactory for real-time soil sensing. Precision and accuracy of the system were highly dependent on maintaining precise, repetitive injection times and maintaining constant flow parameters during the calibration and testing cycle. The progress toward an automated soil extraction system was notable, but considerable effort will be necessary before commercialization can be realized. However, the concept of using ISFETs for the real-time analysis of soil nitrates is sound. The rapid response and low sample volumes required by the multi-sensor ISFET/FIA system make it a viable candidate for use in real-time soil nutrient sensing. AbstractSuccessful implementation of site-specific crop management relies on accurate quantification of spatial variation of important factors. Therefore, there is a tremendous need for the development of sensing technologies that will allow automated collection of soil, crop and pest data, to more accurately characterize within-field variability. The objective of this work was to develop an integrated multi-sensor soil analysis system. Ion-selective field effect transistor (ISFET) technology was coupled with flow injection analysis (FIA) to produce a real-time soil analysis system. Testing of the ISFET/ FIA system for soil analysis was carried out in two stages: (1) using manually extracted samples, and (2) the soil to be analysed was placed in the automated soil extraction system, and the extracted solution fed directly into the FIA system. The sensor was successful in measuring soil nitrates in manually extracted soil solutions (r 2 \0.9). The rapid response of the system allowed a sample to be analysed in 1.25 s, which is satisfactory for real-time soil sensing. Precision and accuracy of the system were highly dependent on maintaining precise, repetitive injection times and maintaining constant flow parameters during the calibration and testing cycle. The progress toward an automated soil extraction system was notable, but considerable effort will be necessary...

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Ion-selective field effect transistors with polymeric membranes

Cited by 71 publications

References 11 publications

Competing surface reactions limiting the performance of ion-sensitive field-effect transistors

Competing surface reactions limiting the performance of ion-sensitive field-effect transistors

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

Real-time multi ISFET/FIA soil analysis system with automatic sample extraction

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