Fluid-fluid phononic crystal sensor for the detection of ethanolconcentration in water

In this article, a fluid-fluid ۲D hexagonal lattice phononic crystal sensor has been regarded for the detectionof ethanol-water mixture concentration (in the range of ۲۰%-۱۰۰%). The structure is composed of mercury and wateras the matrix and inclusions, respectively and a thin layer of latex is considered between the matrix and inclusionswhich will not affect the practical performance of the sensor. A cavity has been formed by properly adjusting theradius of the sensing area and the transmission spectra obtained by finite element method, shifts toward longerwavelengths by the increment of ethanol concentration. The sensitivity and average Q-factor of ۶۷.۴۹ Hz.m۳/kg and۳۳۵۹۳.۴۴ have been obtained, respectively. The sensor is applicable for the detection of ethanol mixture in water withdiverse concentrations. The results indicate that the proposed structure could be used as a highly efficient sensor inindustry and biology.

کلیدواژه ها:

Phononic crystal ، hexagonal lattice ، sensor