This paper presents the ability of electrostatic sprayed tin oxide (SnO2) and tin oxide doped wit... more This paper presents the ability of electrostatic sprayed tin oxide (SnO2) and tin oxide doped with copper oxide (1, 2, and 4 at.% Cu) films to detect different pollutant gases, i.e., H2S, SO2, and NO2. The influence of a copper oxide dopant on the SnO2 morphology is studied using scanning electron microscopy (SEM) technique, which reveals a small decrease in the porosity and particle size when the amount of dopant is increased. The sensing properties of the SnO2 films are greatly improved by doping, i.e., the Cu-doped SnO2 films have large response to low concentration (10 ppm) of H2S at low operating temperature (100 °C). Furthermore, no cross-sensitivity to 1 ppm NO2 and 20 ppm SO2 is observed. Among the studied films, the 1 at.% Cu-doped SnO2 layer is the most sensitive in the detection of all the studied gases.
Recent clinical studies show the bebeficial effects due to the inhalation of appropriate concentr... more Recent clinical studies show the bebeficial effects due to the inhalation of appropriate concentrations of certain natural oils on mental diseases like phobia, stress or Alzheimer. To demonstrate these effects, medical staff needs a system which permits an automatic control of the essential oil diffusion in a closed chamber. For this purpose, out work demonstrates the ability of chosen chemical gas sensors to identify the concentration of an essential oil evaporated in a neutral atmosphere. Sensor responses are studied using a selection of parameters which are tested for their performance to detect the oil concentrations and minimizing the drift effect of the sensors. Out system can detect various quantity of evaporated oil (pin and lavender) in the range of pleasant concentrations for humans.
This paper presents the ability of electrostatic sprayed tin oxide (SnO2) and tin oxide doped wit... more This paper presents the ability of electrostatic sprayed tin oxide (SnO2) and tin oxide doped with copper oxide (1, 2, and 4 at.% Cu) films to detect different pollutant gases, i.e., H2S, SO2, and NO2. The influence of a copper oxide dopant on the SnO2 morphology is studied using scanning electron microscopy (SEM) technique, which reveals a small decrease in the porosity and particle size when the amount of dopant is increased. The sensing properties of the SnO2 films are greatly improved by doping, i.e., the Cu-doped SnO2 films have large response to low concentration (10 ppm) of H2S at low operating temperature (100 °C). Furthermore, no cross-sensitivity to 1 ppm NO2 and 20 ppm SO2 is observed. Among the studied films, the 1 at.% Cu-doped SnO2 layer is the most sensitive in the detection of all the studied gases.
Recent clinical studies show the bebeficial effects due to the inhalation of appropriate concentr... more Recent clinical studies show the bebeficial effects due to the inhalation of appropriate concentrations of certain natural oils on mental diseases like phobia, stress or Alzheimer. To demonstrate these effects, medical staff needs a system which permits an automatic control of the essential oil diffusion in a closed chamber. For this purpose, out work demonstrates the ability of chosen chemical gas sensors to identify the concentration of an essential oil evaporated in a neutral atmosphere. Sensor responses are studied using a selection of parameters which are tested for their performance to detect the oil concentrations and minimizing the drift effect of the sensors. Out system can detect various quantity of evaporated oil (pin and lavender) in the range of pleasant concentrations for humans.
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Papers by Maryam Siadat