Engineered Nanomaterials as Soluble Precursors for Inorganic Films

Talapin, Dmitri V.

doi:10.1002/9780470407790.ch10

Cited by 1 publication

(2 citation statements)

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“…Consequently, slope changes at 'unimodal age' between the two curves are noticeable for every R-chelated sample, even though, for optimal chelation, it behaves more like a single continuous line. These results, in our opinion, highlight the importance of an optimal full chelation when analysing the aggregation kinetics in this kind of sols as it could be statistically treated with a single average value for the fractal dimension right from the final step of the synthesis and, therefore, providing a more predictable aging behaviour that could be exploited in any industry where a fine-tuned precursor particle size is a technological demand (Talapin 2008).…”

Section: R-chelated Samples Treated As Different Chemical Speciesmentioning

confidence: 80%

“…Ferroelectrics, on the other hand, are among the many materials that have been intensively studied, when synthesized by sol-gel based routes (Schwartz and Narayanan 2008;Talapin 2008). Their spreadable technological use, as well as the increasing needs of miniaturization imposed by the electronic industry, have made possible the obtainment of thin ferroelectric films, nanoparticles, nanoceramics and nanostructured composite materials with excellent morphological and operational characteristics for several applications (Goel and Biradar 2013;Prabu et al 2013;Wan et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Influence of chelation ratio of metal alkoxides on aging of PZT 53/47 sol-gel-based precursors

Suárez-Gómez¹,

Sánchez²,

Castañeda-Valderrama³

et al. 2014

Bull Mater Sci

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The high reactivity of metal alkoxides, common starting reagents in sol-gel-based synthesis routes, generally demands the use of chelating agents in order to avoid fast hydrolysis and also to allow an easier manipulation of intermediates as well as final solutions. Under these conditions, stability issues sometimes can be linked to chelation issues that, therefore, should deserve a proper study suited to the material system of interest and, more specially, when considering the use of sol-gel-based precursors in research, small-scale applications and industry. In this work, we explore the sol-gel-based synthesis route of lead zirconate titanate (Pb(Zr 0⋅53 Ti 0⋅47 )O 3 or PZT 53/47) using acetylacetone-chelated propoxides as intermediate reactants. Our main purpose here is to analyse the influence of the alkoxides:acetylacetone chelation ratio on the time evolution of mean particle size in the resultant organic colloidal dispersion used as PZT precursor. Purposely, we explored three different scenarios for chelation: (i) defective chelation, (ii) optimal chelation and (iii) excessive chelation. The time dependence of mean particle size was recorded by dynamic light scattering (DLS) measurements and aggregation kinetics was then explored by considering a diffusion-limited colloidal aggregations (DLCA) model.

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Section: R-chelated Samples Treated As Different Chemical Speciesmentioning

confidence: 80%