期刊
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
卷 87, 期 -, 页码 261-265出版社
ELSEVIER
DOI: 10.1016/j.physe.2016.10.049
关键词
Carbon nanotubes; Chemical vapor deposition; Electron microscopy; Raman spectroscopy; Gas sensing
资金
- University Grants Commission (UGC), New Delhi, India [UGC BSR-Fellowship-Physics-03/RPS/RO/JMI/2015]
- Council of Scientific & Industrial Research (CSIR), India [363401/2k14/1]
In this work, the uniform and vertically aligned single wall carbon nanotubes (SWCNTs) have been grown on Iron (Fe) deposited Silicon (Si) substrate by plasma enhanced chemical vapor deposition (PECVD) technique at very low temperature of 550 degrees C. The as-grown samples of SWCNTS were characterized by field emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM) and Raman spectrometer. SWCNT based chemiresistor gas sensing device was fabricated by making the proper gold contacts on the as-grown SWCNTs. The electrical conductance and sensor response of grown SWCNTs have been investigated. The fabricated SWCNT sensor was exposed to ammonia (NH3) gas at 200 ppm in a self assembled apparatus. The sensor response was measured at room temperature which was discussed in terms of adsorption of NH3 gas molecules on the surface of SWCNTs. The achieved results are used to develope a miniaturized gas sensor device for monitoring and control of environment pollutants.
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