Lateral electrochemical transistor

Generally, films must be patterned to get useful devices. The simplest case is conducting structiu es which are nested like two combs. Such interdigitated structures are useful to measure conductance or to perform electrochemical reactions. Microelectronics makes use of much more complex structm-es, which meanwhile are utihzed also in highly efficient modern electrochemical sensors. A highly complex example is discussed later in connection with ion-selective field effect transistors (ISFET) in Chap. 7. 

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