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- ISFET abstract "ISFET pH electrode also redirects here.An ISFET is an ion-sensitive field-effect transistor used for measuring ion concentrations in solution; when the ion concentration (such as H+, see pH scale) changes, the current through the transistor will change accordingly. Here, the solution is used as the gate electrode. A voltage between substrate and oxide surfaces arises due to an ions sheath.The surface hydrolysis of Si–OH groups of the gate materials varies in aqueous solutions due to pH value. Typical gate materials are SiO2, Si3N4, Al2O3 and Ta2O5.The mechanism responsible for the oxide surface charge can be described by the site binding model, which describes the equilibrium between the Si–OH surface sites and the H+ ions in the solution. The hydroxyl groups coating an oxide surface such as that of SiO2 can donate or accept a proton and thus behave in an amphoteric way as illustrated by the following acid-base reactions occurring at the oxide-electrolyte interface:—Si–OH + H2O ↔ —Si–O– + H3O+—Si–OH + H3O+ ↔ —Si–OH2+ + H2OAn ISFET's source and drain are constructed as for a MOSFET. The gate electrode is separated from the channel by a barrier which is sensitive to hydrogen ions and a gap to allow the substance under test to come in contact with the sensitive barrier. An ISFET's threshold voltage depends on the pH of the substance in contact with its ion-sensitive barrier.".
- ISFET wikiPageExternalLink 897.
- ISFET wikiPageExternalLink isfet.
- ISFET wikiPageExternalLink freeabs_all.jsp?arnumber=4428805.
- ISFET wikiPageExternalLink ICMENS.2003.1222002.
- ISFET wikiPageExternalLink ISFET-Bergveld.pdf.
- ISFET wikiPageExternalLink ISFET-Bergveld.pdf.
- ISFET wikiPageExternalLink Cha08sec324.pdf.
- ISFET wikiPageExternalLink aeb72a1c32e88072b67dda7074880bfb.
- ISFET wikiPageID "2036897".
- ISFET wikiPageRevisionID "592398268".
- ISFET hasPhotoCollection ISFET.
- ISFET subject Category:Acid-base_chemistry.
- ISFET subject Category:Electrochemistry.
- ISFET subject Category:Electrodes.
- ISFET subject Category:Measuring_instruments.
- ISFET subject Category:Sensors.
- ISFET subject Category:Transistor_types.
- ISFET type Artifact100021939.
- ISFET type Conductor103088707.
- ISFET type Detector103180969.
- ISFET type Device103183080.
- ISFET type Electrode103274796.
- ISFET type Electrodes.
- ISFET type Instrument103574816.
- ISFET type Instrumentality103575240.
- ISFET type MeasuringInstrument103733925.
- ISFET type MeasuringInstruments.
- ISFET type Object100002684.
- ISFET type PhysicalEntity100001930.
- ISFET type Sensors.
- ISFET type Whole100003553.
- ISFET comment "ISFET pH electrode also redirects here.An ISFET is an ion-sensitive field-effect transistor used for measuring ion concentrations in solution; when the ion concentration (such as H+, see pH scale) changes, the current through the transistor will change accordingly. Here, the solution is used as the gate electrode. A voltage between substrate and oxide surfaces arises due to an ions sheath.The surface hydrolysis of Si–OH groups of the gate materials varies in aqueous solutions due to pH value.".
- ISFET label "ISFET".
- ISFET label "ISFET".
- ISFET label "ISFET".
- ISFET label "ISFET".
- ISFET label "Ion Sensitive Field Effect Transistor".
- ISFET label "Ionensensitiver Feldeffekttransistor".
- ISFET sameAs ISFET.
- ISFET sameAs Ionensensitiver_Feldeffekttransistor.
- ISFET sameAs ISFET.
- ISFET sameAs Ion_Sensitive_Field_Effect_Transistor.
- ISFET sameAs Transistor_efek_medan_peka-ion.
- ISFET sameAs ISFET.
- ISFET sameAs ISFET.
- ISFET sameAs m.06gssz.
- ISFET sameAs Q904133.
- ISFET sameAs Q904133.
- ISFET sameAs ISFET.
- ISFET wasDerivedFrom ISFET?oldid=592398268.
- ISFET isPrimaryTopicOf ISFET.