title: Sensing properties of multiwalled carbon nanotubes grown in MW plasma torch: electronic and electrochemical behavior, gas sensing, field emission, IR absorption.
abstract: 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 µm 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.
authors: Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic. businova@feec.vutbr.cz.
authors: Petra
authors: P
authors: Majzlíková
authors: Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic. xsedla44@stud.feec.vutbr.cz.
authors: Jiří
authors: J
authors: Sedláček
authors: Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic. prasek@feec.vutbr.cz.
authors: Jan
authors: J
authors: Prášek
authors: Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic. prasek@feec.vutbr.cz.
authors: Jan
authors: J
authors: Pekárek
authors: Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic. vojtech.svatos@ceitec.vutbr.cz.
authors: Vojtěch
authors: V
authors: Svatoš
authors: Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic. 234860@mail.muni.cz.
authors: Alexander G
authors: AG
authors: Bannov
authors: Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic. jasek@physics.muni.cz.
authors: Ondřej
authors: O
authors: Jašek
authors: Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic. synek@physics.muni.cz.
authors: Petr
authors: P
authors: Synek
authors: Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic. mareke@physics.muni.cz.
authors: Marek
authors: M
authors: Eliáš
authors: Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic. lenkaz@physics.muni.cz.
authors: Lenka
authors: L
authors: Zajíčková
authors: Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic. hubalek@feec.vutbr.cz.
authors: Jaromír
authors: J
authors: Hubálek
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