Majzlíková Petra, Sedláček Jiří, Prášek Jan, Pekárek Jan, Svatoš Vojtěch, Bannov Alexander G, Jašek Ondřej, Synek Petr, Eliáš Marek, Zajíčková Lenka, Hubálek Jaromír
Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
Sensors (Basel). 2015 Jan 26;15(2):2644-61. doi: 10.3390/s150202644.
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.
在微波等离子体炬中生长出平均直径低于80纳米且均匀的垂直排列多壁碳纳米管（VA-MWCNTs）层厚度约为16微米，并对其选定的功能特性进行了测试。通过傅里叶变换红外光谱研究了对测辐射热计构建重要的红外吸收。通过循环伏安法进行了基本的电化学表征。将所得结果与标准或MWCNT修饰的丝网印刷电极进行比较，制备的VA-MWCNT电极显示出其在构建电化学传感器方面的高潜力。考虑到室温操作，电阻式CNT气体传感器对氨表现出良好的灵敏度。从CNTs检测到的场发射适用于基于带有弯曲隔膜的二极管结构中发射电流测量的压力传感应用。因此，CNTs微波等离子体炬生长的优势，即快速处理和工艺的通用性，可以充分用于将表面生长的CNTs集成到各种传感结构中。
