Multisensing ion-selective field effect transistors prepared by ionophore doping technique

Bezegh, Klara.; Bezegh, Andras.; Janata, Jiřı́; Oesch, U.; Xu, Aidong; Simon, W.

doi:10.1021/ac00151a005

Cited by 32 publications

(19 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bezegh et al (10) have suggested the shorter lifetime of electrodes with a solid state/membrane interface could result from differences in morphology arising from rapid evaporation of casting solvent from the solid-state sensor. However, we have prepared the solid-state devices under a saturated THF atmosphere and the membranes require about 24 h to dry, which is similar to the drying time of ISE membranes cast in the usual manner (11).…”

Section: Resultsmentioning

confidence: 99%

“…The key feature of this approach is that mobility of the plasticizer in the membrane would likely be reduced, and its solubility in water decreased, which are both potentially useful features in membranes coated on integrated devices (8)(9)(10). At the same time no surface adhesion results from this approach, so the effects of cross-linking can be studied separately.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Photopolymerization of plasticizer in ion-sensitive membranes on solid-state sensors

Harrison¹,

Teclemariam²,

Cunningham³

1989

Anal. Chem.

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Photopolymerization of plasticizer in ion-sensitive membranes on solid-state sensors

Harrison¹,

Teclemariam²,

Cunningham³

1989

Anal. Chem.

View full text Add to dashboard Cite

“…The calculated selectivity coefficients of the presented EGFET-based chloride ion sensor for four different interfering ions (OH − , F − , SO 2− 4 , and Br − ) are listed in Table 1. 18,28,29 All of the four devices listed in the new added Table 2 are FET-based chloride ion sensors, and only this work presented a high-sensing linearity and low-hysteresis voltage characteristics of the implemented chloride ion sensors. Finally, as shown in Table 2, we compared the six sensing characteristics (including sensitivity, sensing linearity, linear range, hysteresis voltage, lifetime, and selectivity) obtained in this study using the optimum compositions with those in the previous literatures.…”

Section: Characterization Of the Egfet-basedmentioning

confidence: 95%

Development of a low-hysteresis and high-linearity extended gate field-effect transistor-based chloride ion-sensitive microsensor

Huang

Hsieh

Chang

2013

J. Micro/Nanolith. MEMS MOEMS

View full text Add to dashboard Cite

A low-hysteresis voltage and high-sensing linearity chloride ionsensitive sensor based on an extended gate field-effect transistor (EGFET) for real-time water quality monitoring microsystem applications is presented. All of the EGFET-manufacturing processes adopted in this work are compatible with standard integrated circuits planar technology, and therefore, they are very suitable for the mass production. Two EGFETbased chloride ion-sensitive microsensors having same channel width/ length ratio (1000 μm∕10 μm) but with different channel geometries (rectangular and annular types) are presented. At pCl 3 (log½Cl − ¼ −3) test point, a very small hysteresis voltage of the rectangular-and annularchannels EGFET-based Cl − microsensors (5 and 7 mV, respectively) can be achieved. As the concentrations tested ranging from pCl 1 (log½Cl − ¼ −1) to pCl 5 (log½Cl − ¼ −5), a very high-sensing linearity (99.23% and 99.08%) of the two types of EGFET-based Cl − microsensors is achieved. However, the sensitivity of the rectangular-channel EGFETbased Cl − microsensor (45 mV∕pCl) is much higher than that of the annular-channel EGFET-based Cl − microsensor (37 mV∕pCl). The selectivity coefficient of the investigated EGFET-chloride ion sensor under four different interfering ions (OH − , F − , SO 2− 4 , and Br − ) are also measured and analyzed.

show abstract

“…One of the main advantages of ISFETs is that they are non-selective, and may be used with any suitable ionic solution [ 226 ]. Therefore, if processed with a suitable selective membrane (e.g., by using an ionophore) they are able to detect multiple different ions in solution [ 227 ]. One drawback to this is that with the sensor being sensitive to multiple different types of ions, any leakage of solution or change in the external environment affecting the pH of the solution, will change the ISFET reading.…”

Section: Electrical Biosensorsmentioning

confidence: 99%

“…One drawback to this is that with the sensor being sensitive to multiple different types of ions, any leakage of solution or change in the external environment affecting the pH of the solution, will change the ISFET reading. Over the longer term, this is particularly an issue, as hydrogen ions are difficult to prevent from permeating a membrane due to their small size [ 227 ]. Fortunately, an advantage for ISFETs (and other FET-based sensors) is that due to the huge commercial interest in transistor technology, miniaturisation of FETs is now very straightforward.…”

Section: Electrical Biosensorsmentioning

confidence: 99%

Biosensors Based on Mechanical and Electrical Detection Techniques

Chalklen

Jing

Kar‐Narayan

2020

Sensors

View full text Add to dashboard Cite

Biosensors are powerful analytical tools for biology and biomedicine, with applications ranging from drug discovery to medical diagnostics, food safety, and agricultural and environmental monitoring. Typically, biological recognition receptors, such as enzymes, antibodies, and nucleic acids, are immobilized on a surface, and used to interact with one or more specific analytes to produce a physical or chemical change, which can be captured and converted to an optical or electrical signal by a transducer. However, many existing biosensing methods rely on chemical, electrochemical and optical methods of identification and detection of specific targets, and are often: complex, expensive, time consuming, suffer from a lack of portability, or may require centralised testing by qualified personnel. Given the general dependence of most optical and electrochemical techniques on labelling molecules, this review will instead focus on mechanical and electrical detection techniques that can provide information on a broad range of species without the requirement of labelling. These techniques are often able to provide data in real time, with good temporal sensitivity. This review will cover the advances in the development of mechanical and electrical biosensors, highlighting the challenges and opportunities therein.

show abstract

Multisensing ion-selective field effect transistors prepared by ionophore doping technique

Cited by 32 publications

References 14 publications

Photopolymerization of plasticizer in ion-sensitive membranes on solid-state sensors

Photopolymerization of plasticizer in ion-sensitive membranes on solid-state sensors

Development of a low-hysteresis and high-linearity extended gate field-effect transistor-based chloride ion-sensitive microsensor

Biosensors Based on Mechanical and Electrical Detection Techniques

Contact Info

Product

Resources

About