1. Tillstra L, Allen Brougton S, Robin Jelski S, French V, Zhang G, Alexander Popov K (2008) The science of nanotechnology an introductory text. Nova Science Publishers, Inc, New York
2. Victor Klimov I (2004) Semiconductor and metal nanocrystals synthesis and electronic and optical properties. Copyright by Marcel Dekker Inc.
3. George Fine F, Cavanagh LM, Afonja A, Binions R (2010) Metal oxide semi-conductor gas sensors in environmental monitoring. Sensors 10:5469–5502
4. Bangale SV, Bamane SR (2012) Preparation and study of h2S gas sensing behavior of ZnFe2 O 4 thick film resistors. Sensors Transd. 137:123–136
5. Hu Y, Zhou X, Han Q, Huang Y (2003) Sensing properties of CuO/ZnO hetrojunction gas sensors. Mater Sci Eng 99:4143