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Indoor air pollution and the contribution of biosensors

resonance frequency due to mass loading, has shown high sensitivity for chemicals and has potential application related to artificial noses ( 75 ). For example, piezoelectric substrate modified with SnO2 thin films was used for development hydrogen gas surface acoustic wave (SAW) sensors ( 76 ). In this study, enhancement of the sensor performance was proceed by creating bi-layer sensing film made from SnO2 and highly dispersed palladium nanoparticle layers. Also, SAW based sensors were used to monitor methanol, diesels and benzenes ( 77 ), nitrogen dioxides ( 78

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Corrosion inhibition of iron surfaces with phosphatidic acid

for layer thickness was conducted in Thin Film Companion (TFC) software (Semiconsoft). Results Benchmarking the acidic corrosion of the iron surface To establish a reference, corrosion of iron in acetic acid was monitored using QCM. Experiments were performed with 0.1M and 0.01M acetic acid at 25 °C, and the rates of iron dissolution were established. Fig. 1 . shows and example of the experimental results, the effect of 10 mM acetic acid on the iron surface at 25 °C. After an initial period (~8 min) linear increase of the frequency from zero to 2.3 kHz is

Open access