Molecular Recognition by a p-n Semiconductor Contact

Hidetaka ITO, Satoru FUJITSU, Masaru MIYAYAMA, Kunihito KOUMOTO, Hiroaki YANAGIDA
1992 Journal of the Ceramic Society of Japan  
A novel and promising method for the detection of chemical molecules in a liquid was realized using a con tact of p-CuO and n-type ZnO semiconducting ceram ics (p-n contact). When this device is soaked in an alco hol, a characteristic current-voltage (I-V) relation is observed. It is possible to discriminate the chemical species and to estimate the alcohol concentration in al cohol-water solutions. Since the characteristic I-V re lation occurs from chemical interaction between alco hol
more » ... and semiconductor surfaces at the con tact interface, the p-n contact is expected to be applica ble for the detection of other chemical molecules in a liquid-or gas-state.
doi:10.2109/jcersj.100.350 fatcat:cbfgjvamhndy3bi2ns6abjdcdm