This study represents a facile but effective room-temperature strategy for the synthesis of shape/size-controlled cuprous oxide (Cu2O) nanoparticles under mild conditions. The proposed synthesis method offers several advantages/novelties including: room-temperature processing, simple operation procedures, controllable shape and size, high yield, and available for scaling up. The effects of the pertinent variables on the particle formation and growth have been investigated, such as concentration of copper ions (Cu2+), surfactants, reducing agents, and the molar ratios among variables. The compo...