Raman Spectroscopic Study of Carbon Nanotubes Prepared Using Fe/ZnO‐Palm Olein‐Chemical Vapour Deposition

Abstract

Multiwalled carbon nanotubes (MWCNTs) were synthesized using Fe/ZnO catalyst by a dual-furnace thermal chemical vapor deposition (CVD) method at 800–1000°C using nitrogen gas with a constant flow rate of 150 sccm/min as a gas carrier. Palm olein (PO), ferrocene in the presence of 0.05 M zinc nitrate, and a p-type silicon wafer were used as carbon source, catalyst precursor, and sample target, respectively. D, G, and G′bands were observed at 1336–1364, 1559–1680, and 2667–2682 cm-1, respectively. Carbon nanotubes (CNTs) with the highest degree of crystallinity were obtained at around8000°C, and the smallest diameter of about 2 nm was deposited on the silicon substrate at1000°C.

Real-Time Information-Variable Invisible Barcode Comprising Freely Deformable Infrared-Emitting Yarns

“…The G’ peak at ∼2670 cm –1 denoted the second-order overtone of the D band. It presents useful information about the crystalline state of the CNT. − …”

Raman and Electrical Analysis of Iodine-Doped Amorphous Carbon Thin Films

“…The G-mode also involves the in-plane bond stretching vibration of any pair of sp 2 whereas the D-peak is A 1g symmetry involves the sp 2 inside the ring only [11]. In other words, D-band is said to correspond to the defects associated with the vacancies and the presence of other carbonaceous impurities that destroys the graphitic symmetry of the G-band [12,13].…”

Carbon Nanotubes: A Brief Outlook on History, Synthesis Methods and Various Bio-Hydrocarbon Sources

“…CNT have been successfully synthesized by bio-hydrocarbon precursor such as camphor by CVD method [28,29], turpentine and eucalyptus oil by spray pyrolysis method [17,21], crude palm oil and palm oil by TCVD and spray pyrolysis method [30][31][32]. In addition, CNT also have been synthesized using neem [33], coconut [34,35] and castor [36], and palm olein [37] by TCVD method. It is also reported by Azmina et al that the CNT can be synthesized using olive, corn and sesame oil by TCVD method [35].…”