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13
CH3041
SEMICONDUCTORS II.h
• A pH sensitive
layer responds to changes in the external H+ ion level. The H+ ions create a positive
gate potential which allows current
to flow between the source & drain.
• The voltage (rel. to reference electrode)
needed to bring the current back to it’s initial
value is the response of the electrode.
needed to bring the current back to it’s initial
value is the response of the electrode.
H+ H+ H+ H+
V
