CaCO3 nanoparticles synthesized from CaCl2 and Na2CO3using a new, simple and fast technique.Factors affecting on the particle size such as concentration of Ca 2+ and CO3 2-, PEG weight dissolved in Ca 2+ solution, flow rate, temperature, media type, PEG weight dissolved in the used medium, concentration of CO3 2-, stirring speed, medium volume and additive dissolved within Ca 2+ solution investiga...