Instant Notes: Analytical Chemistry

H1 – Chemical sensors and biosensors 327

n-Si n-Si

pH

n-Si n-Si

Na+

n-Si n-Si

K+

p-Si substrate

Fig. 5. FET sensor arrray for monitoring pH, sodium and potassium. Reproduced from

R. Kellner et al., Analytical Chemistry, 1998, with permission from Wiley-VCH.