Observation of chemicals evaporation (ethanol, methanol and 2-propanol) using vibrated microcantilever

Microcantilever is a device of MEMS (microelectro-mechanical system) which can be used as bio-chemical sensor, such to determine the characteristics chemical liquids. In this work, an investigation evaporation rate liquids, i.e., ethanol, methanol, and propanol, was carried out using resonant frequency change vibrated microcantilever. We two types microcantilever, namely uncoated-microcantilever (reference) ZnO-coated A growth ZnO nanorods on microcantilever by hydrothermal method through 2 stages, coating seed (seeding) rods. The layer deposited dip-coating from solution zinc nitrate tetrahydrate (ZNT) dietanolamine (DEA) in ethanol. were then grown hexamethylenetetramine (HMTA) demineralized water at 80°C for hours. experimental results show that, before dropping ethanol measured 36.80 kHz. After raised 36.84 From data, calculated 0.150 picogram/minute. Moreover, methanol propanol obtained 0.149 picogram/minute picogram/minute, respectively. For frequencies after reveal value 13.98 kHz 12.33 kHz, However, did not return initial dropping, indicating that molecule reacts with surface remains surface.