Amorphous carbon nanotubes (alpha-CNTs) were synthesized by a chemical reaction between ferrocene and ammonium chloride at a temperature (similar to 250 degrees C) in an air furnace. As- synthesized alpha-CNTs were purified with deionized water and hydrochloric acid. A purified alpha-CNTs were hybridized with cuprous oxide nanoparticles (Cu2O) through a simple chemical process. Morphology of the samples was analyzed with field emission scanning electron microscope (FESEM) and transmission electron microscopy (TEM). Fourier transform infrared (FTIR) spectra showed the attachment of acidic functional groups onto the surface of alpha-CNTs and the formation of hybridized alpha-CNT5-Cu2O. Raman spectra reveal the amorphous nature of the carbon. X-ray diffraction (XRD) pattern confirmed the amorphous phase of the carbon and the formation of Cu2O crystalline phase. The coating of Cu2O was confirmed by FESEM, TEM, and XRD. Optical absorption of the samples has also been investigated and the quantum confinement effect was illustrated in the absorption spectra. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.