Light-addressable potentiometric sensor
Encyclopedia
A light-addressable potentiometric sensor (LAPS) is a sensor
that uses light (e.g. LED
s) to select what will be measured. Light can activate carriers in semiconductor
s.
-sensitive LAPS that uses LEDs in combination with (semiconducting) silicon and pH-sensitive Ta2O5.
Sensor
A sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument. For example, a mercury-in-glass thermometer converts the measured temperature into expansion and contraction of a liquid which can be read on a calibrated...
that uses light (e.g. LED
LEd
LEd is a TeX/LaTeX editing software working under Microsoft Windows. It is a freeware product....
s) to select what will be measured. Light can activate carriers in semiconductor
Semiconductor
A semiconductor is a material with electrical conductivity due to electron flow intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter...
s.
History
An example is the pHPH
In chemistry, pH is a measure of the acidity or basicity of an aqueous solution. Pure water is said to be neutral, with a pH close to 7.0 at . Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline...
-sensitive LAPS that uses LEDs in combination with (semiconducting) silicon and pH-sensitive Ta2O5.