Electro-mass multi odor sensor

For an olfactory sensor or electronic nose the task is not only to detect the object concentration, but also to recognize it. It is well known that all the elements can be identified by their charge to mass ratio e+/m. We tried to use this principle for molecular recognition. Two kinds of sensors are used simultaneously in testing. One is Quartz Crystal Microbalance (QCM) for detecting the change in mass, the other is Interdigital Electrode (IE) for detecting the change in conduction. In this paper the principle and the feasibility of this method are reported. The preliminary results on the recognition of alcohols are presented. The multisensor can be used as an instrument for research on material properties and kinetic process as well.

For an olfactory sensor or electronic nose the task is not only to detect the object concentration, but also to recognize it. It is well known that all the elements can be identified by their charge to mass ratio e+/m. We tried to use this principle for molecular recognition. Two kinds of sensors are used simultaneously in testing. One is Quartz Crystal Microbalance (QCM) for detecting the change in mass, the other is Interdigital Electrode (IE) for detecting the change in conduction. In this paper the principle and the feasibility of this method are reported. The preliminary results on the recognition of alcohols are presented. The multisensor can be used as an instrument for research on material properties and kinetic process as well.

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Tsinghua Univ.; Educ Minist China.; Sci & Technol Dev Minist China.; Natl Nat Sci Fdn China.; Beijing City Govt.; Chinese Acad Sci.; Ford Motor Co.; KC Wong Educ Fdn.; Kin-Tek Co.; Medisense Co.; State Key Lab Transducer Technol China.; Beijing Sci & Technol Commiss.

Acad Sinica, Inst Semicond, Beijing 100083, Peoples R China

Tsinghua Univ.; Educ Minist China.; Sci & Technol Dev Minist China.; Natl Nat Sci Fdn China.; Beijing City Govt.; Chinese Acad Sci.; Ford Motor Co.; KC Wong Educ Fdn.; Kin-Tek Co.; Medisense Co.; State Key Lab Transducer Technol China.; Beijing Sci & Technol Commiss.