J Macioszczyk, M Lenartowicz, K Malecha, LJ Golonka – Additional Papers and …, 2016
We present the results of our work on design and fabrication of Low Temperature Co-fired Ceramics (LTCC) Electrolyte as a Cathode Discharge (ELCAD) chip. It consists of plasma chamber filled with working gas (for instance helium). The fluidic channel with sample is placed below the chamber. Discharge ignites between anode and electrolyte cathode through aperture between microfluidic channel and plasma chamber. To avoid filling the chamber with fluid, channel and waste outlet should have proper geometry. We have checked our design and fabricated prototypes in DuPont system. External electrodes have been screen-printed using solderable PdAg paste. Inner electrodes, responsible for plasma creation, were made of platinum. To avoid sagging of structures we have used Sacrificial Volume Materials (SVM) and conducted multistep lamination with modified parameters. Finally, we tested if our device works properly. Firstly, we created discharge using high voltage alternating current source in air and observed discharge. Then, we ran measurements in ECLAD configuration. It was possible to create and sustain discharge with flowing liquid and gas. Also discharge spectra were recorded and analyzed. Zinc and cadmium were detected with limits of 0.14 mg/dm3 and 0.20 mg/dm3, respectively.
… View larger version (10K), Fig. 5.Scheme of the experimental setup. As a detector simple spectrometer (StellarNet BLUE-Wave) was used. Light intensity of the discharge spectra is presented in Fig. 6. The highest peak comes from OH (263, 283 and 310 nm). …
