ISFET based enzyme sensors
نویسندگان
چکیده
منابع مشابه
A signal processing ASIC for ISFET-based chemical sensors
With the advantages of small size, reliability, rapid response, compatibility to standard CMOS technology and on-chip signal processing, Ion-Sensitive Field Effect Transistor (ISFET)-based transducers are increasingly being applied in physiological data acquisition and environment monitoring. This paper presents a signal processing Application Specific Integrated Circuit (ASIC) and a discrete t...
متن کاملShort Communication THE pH-STATIC ENZYME SENSOR An ISFET-based Enzyme Sensor, Insensitive to the Buffer Capacity of the Sample
Enzyme sensors based on the measurement of pH consist basically of a pH-sensitive electrode to which an enzyme-loaded membrane is attached. The conversion of substrate in the immobilized enzyme membrane results in a local change in pH which can then be measured. The pH-sensitive electrode used is usually a glass membrane electrode or an ISFET. In 1980, Caras and Janata [l] described the first I...
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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 sa...
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We have fabricated organic field-effect transistors (OFETs) with regioregular poly(3-hexylthiophene) (P3HT) operable at low-voltages in liquid solutions, suitable for in vitro biosensing applications. Measurements in electrolytes have shown that the performance of the transistors did not deteriorate and they can be directly used as ion-sensitive transducers. Furthermore, more complex media have...
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A program for the simulation of the response of an ISFET with an oxynitride gateinsulator will be introduced, which is based on the site-binding model and is designed for an ISFET working in constant charge mode. With this program, principal properties of ISFET operation can be calculated, such as pH sensitivity dependent on surface charge density and surface composition. In addition, an ISFET ...
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ژورنال
عنوان ژورنال: Biosensors
سال: 1987
ISSN: 0265-928X
DOI: 10.1016/0265-928x(87)80025-1