Journal
SENSORS
Volume 15, Issue 2, Pages 2644-2661Publisher
MDPI
DOI: 10.3390/s150202644
Keywords
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Funding
- operational program Research and Development for Innovation
- SIX project [CZ.1.05/2.1.00/03.0072]
- Grant Agency of the Czech Republic [GACR P205/10/1374, GA13-19947S]
- project Employment of Newly Graduated Doctors of Science for Scientific Excellence [CZ.1.07/2.3.00/30.0009]
- European Social Fund
- state budget of the Czech Republic
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Vertically aligned multi-walled carbon nanotubes (VA-MWCNTs) with an average diameter below 80 nm and a thickness of the uniform VA-MWCNT layer of about 16 mu m were grown in microwave plasma torch and tested for selected functional properties. IR absorption important for a construction of bolometers was studied by Fourier transform infrared spectroscopy. Basic electrochemical characterization was performed by cyclic voltammetry. Comparing the obtained results with the standard or MWCNT-modified screen-printed electrodes, the prepared VA-MWCNT electrodes indicated their high potential for the construction of electrochemical sensors. Resistive CNT gas sensor revealed a good sensitivity to ammonia taking into account room temperature operation. Field emission detected from CNTs was suitable for the pressure sensing application based on the measurement of emission current in the diode structure with bending diaphragm. The advantages of microwave plasma torch growth of CNTs, i.e., fast processing and versatility of the process, can be therefore fully exploited for the integration of surface-bound grown CNTs into various sensing structures.
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