The main focus of the present book is the characterization of a number of nano-semiconducting materials, using such techniques as powder X-ray diffraction, UV-visible spectrophotometry, Raman spectrometry, scanning electron microscopy, transmission electron microscopy and vibrating sample magnetometry. The materials studied include Zn S, Ti O2, Ni O, Ga doped Zn O, Mn doped Sn O2, Mn doped Ce O2 and Mn doped Zr O2. Keywords: Nano Semiconducting Materials, characterization, powder X-ray diffraction, UV-visible spectrophotometry, Raman spectrometry, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, Zn S, Ti O2, Ni O, Ga doped Zn O, Mn doped Sn O2, Mn doped Ce O2, Mn doped Zr O2.