Fatemeh Piri - Department of Materials Engineering , Faculty of Engineering, University of Sistan andBaluchestan, Zahedan, Iran
Amir Masoud Arabi - Department of Nanomaterials and nanocoatings, Institute for Color Science andTechnology (ICST), Tehran, Iran
Mahdi Shafiee Afarani - Department of Materials Engineering , Faculty of Engineering, University of Sistan andBaluchestan, Zahedan, Iran

This investigation has been focused on synthesis of nanostructured copper oxide viaprecipitation process. Different surface modifiers (SMs) such as polyvinylpyrrolidone (PVP),Polyethylene glycol sorbitanmonooleate (Tween ۸۰) and Cetyltrimethylammonium bromide(CTAB) have been selected for optimizing the size and shape of nano CuO. The characterizationof copper oxide nanoparticles was performed using X-ray diffractometer (XRD), scanning andtransmission electron microscope (SEM and TEM) and Uv-Visible spectrophotometer techniques.The results revealed that SM type should be noticed as a critical parameter in the synthesis of upto ۱۰ nm CuO. Although, all SMs caused the formation of ordered spherical shape of CuOnanoparticles, but the size of nanoparticles was changed in the range of ۵-۳۰ nm due to thechemical nature of SMs. The smallest nanoparticles obtained in the presence of CTAB. However,concentration of CTAB introduced as the main effective parameter on size, shape and band gap ofCuO

Copper oxide, Precipitation, surface modifiers, Band gap, Morphology