Abstract
Solvents are widely used in daily life as well as in almost all laboratories. Identification and detection of these solvents used in many areas have great importance in terms of health, toxicology and environment. For this reason, the main purpose of our study is to be able to identify the solvents in practical ways. In this study, gold microelectrodes were used to define the capacitance detection of various solvents in the frequency range of 20 kHz - 2 MHz. Moreover, the electrical noise and signal output of the solvents at different frequencies were investigated. Measurements were made by micro-channels integrated on microelectrodes for reducing noises and detection with high sensibility.
Highlights
All materials have different dielectric properties depending on their atomic and molecular structures. These properties show changes with frequency [1]. This enables the characterization of materials depending their electrical properties
There are lots of electrode types used in dielectric spectroscopy that is called as electrochemical impedance spectroscopy (EIS)
Micro channels were fabricated from PDMS (Sylgard 184 Dow Corning)
Summary
All materials have different dielectric properties depending on their atomic and molecular structures. These properties show changes with frequency [1]. Solvents are everywhere; we drink them, burn them, use them for cleaning or putting them in our pills etc They are very important in our life and it is very important to detect and identify solvents sensitively. We tried to detect solvents exploiting different dielectric behaviors under applied AC electric signal. We investigated different methods of sending the solvent on the sensing area.
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