Catalyst free, excellent quality and narrow diameter of CNT growth on Al2O3 by a thermal CVD technique

shows the EDX results of grown CNTs on Al2O3 substrate. It clearly shows the presence of carbon, oxygen and aluminum in the sample material. The atomic percentage of C, O and Al are 6.95%, 58.77% and 34.28% respectively. The presence of aluminum and oxygen elemental contents confirmed that only Al2O3 along with CNTs is present on the grown sample.