Growth Kinetics of ZnO Nanocrystals in the Presence of a Base: Effect of the Size of the Alkali Cation
Data(s) |
23/12/2010
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Resumo |
Following an earlier study (J. Am. Chem Soc. 2007, 129, 4470) describing a very unusual growth kinetics of ZnO nanoparticles, we critically evaluate here the proposed mechanism involving a crucial role of the alkali base ion in controlling the growth of ZnO nanoparticles using other alkali bases, namely, LiOH and KOH. While confirming the earlier conclusion of the growth of ZnO nanoparticles being hindered by an effective passivating layer of cations present in the reaction mixture and thereby generalizing this phenomenon, present experimental data reveal an intriguing nonmonotonic dependence of the passivation efficacy on the ionic size of the alkali base ion. This unexpected behavior is rationalized on the basis of two opposing factors: (a) solvated cationic radii and (b) dissociation constant of the base. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/35016/1/Growth.pdf Santra, Pralay K and Mukherjee, Sumanta and Sarma, DD (2010) Growth Kinetics of ZnO Nanocrystals in the Presence of a Base: Effect of the Size of the Alkali Cation. In: Journal of Physical Chemistry C, 114 (50). pp. 22113-22118. |
Publicador |
American Chemical Society |
Relação |
http://pubs.acs.org/doi/abs/10.1021/jp108613f http://eprints.iisc.ernet.in/35016/ |
Palavras-Chave | #Solid State & Structural Chemistry Unit |
Tipo |
Journal Article PeerReviewed |