Abstract:
This study present the preparation process of polymer coated a sensory device called
quartz crystal microbalance (QCM) for determination of odorant gas sample which
belong to volatile organic compounds (VOCs). The main polymer materials used were composed of polyethylene glycol (PEG) and lipid through pegylation process and the product was called PEGylated lipopolymer. The preparation of thin film layer was using
three different methods which was dip method, drop method and spin method. The
purpose of several coating technique used in this study was to choose the most suitable
method to coat the QCM’s surface while different sensing materials were used. There was
also a determination on sensor sensitivity of gas detection towards their concentration
while purging to the system. The aim of gas measurement was to see at which
concentration level will become the limit for coated sensor to detect gas sample. In
addition, the gas sample used in this study were ethanol and hexane. Ethanol belong to
alcohol group while hexane belong to alkane group. Furthermore, the results from gas
measurement indicates that the sensitivity of sensors coated with PEGylated lipopolymer
films are better for ethanol detection than hexane, and yet still lower compared to sensor
coated with polymer and lipid films only.
