Surface charge-assisted synthesis of ZnO on polarized BaTiO3 substrate
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The present work reports the effect of charged surfaces of BaTiO3 substrate on the synthesis of ZnO. The unpolarized and polarized BaTiO3 substrates were immersed in ZnO precursor solution and synthesis behavior of ZnO on both the surfaces was compared. The polarized BaTiO3 substrates have been observed to accelerate ZnO crystal growth. The surface charge density of the polarized substrate was measured to be 1.6 μC/cm2. To understand the effect of amount of substrate charge on growth behavior of ZnO crystals, the substrates with varying charge densities were prepared through partial depolarization of polarized substrates. With increase in the amount of surface charge, crystallization of ZnO increases due to enhanced electrostatic interactions. Overall, the polarization-assisted deposition method has been suggested as a simple, efficient, and rapid technique for the synthesis of multifunctional ZnO.
KeywordsZnO BaTiO3 Surface charge Crystallization
AKD gratefully acknowledge SERB, Department of Science and Technology (DST), Government of India for thier support.
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