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In this work ZnO nanoparticles were synthesized by coprecipitation method. We investigated the reactivity of 0.24μm and 50nm ZnO sample as bulk and nano-sized, respectively. According to core–shell model we designated the electron paramagnetic resonance (EPR) signal at g∼2.004 and g∼1.961 as surface defects and core defects, respectively. Dependency of intrinsic defects on the surface and core were...
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