Humidity and illumination organic semiconductor copper phthalocyanine sensor for environmental monitoring.

In this investigation properties of organic semiconductor copper phthalocyanine (CuPc) capacitive humidity and illumination sensors were studied. Organic thin film was deposited by vacuum evaporation on a glass substrate with silver surface-type electrodes to form the Ag/CuPc/Ag sensor. The capacitance of the samples was evaluated at room temperature in the relative humidity range of 35-92%. It was observed that capacitance of the Ag/CuPc/Ag sensor increases with increase in humidity. The ratio of the relative capacitance to relative humidity was about 200. It is assumed that in general the capacitive response of the sensor is associated with polarization due to absorption of water molecules and transfer of charges (electrons and holes). It was observed that under filament lamp illumination of up to 1,000 lx the capacitance of the Ag/CuPc/Ag photo capacitive detectors increased continuously by 20% as compared to dark condition. It is assumed that photo capacitive response of the sensor is associated with polarization due to transfer of photo-generated electrons and holes. An equivalent circuit of the Ag/CuPc/Ag capacitive humidity and illumination sensor was developed. Humidity and illumination dependent capacitance properties of this sensor make it attractive for use in humidity and illumination multi-meters. The sensor may be used in instruments for environmental monitoring of humidity and illumination.

[The dynamics of antibody formation in patients with fresh forms of syphilis treated by the single-course method with the novocaine salt of benzylpenicillin]. / Dinamika antiteloobrazovaniia u bol'nykh svezhimi formami sifilisa, lechennykh po odnokusovoi metodike novokainovoi sol'iu benzilpenitsillina.

Investigation of the blood sera of patients with fresh syphilis forms before, immediately after, and in 6-18 months after treatment has confirmed a high sensitivity of the serologic tests for syphilis used in this country. The results of dynamic serologic monitoring of patients have demonstrated high efficacy of the therapeutic method used.