Control of Defects and Magnetic Properties in Colloidal HfO<sub>2</sub> Nanorods

Tirosh, Einat; Markovich, Gil

doi:10.1002/adma.200602222

Cited by 73 publications

(57 citation statements)

References 29 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even the use in biological applications should not be excluded because of the negligible cytotoxicity of HfO2 (Field et al 2011). Hafnium oxide nanoparticles have already been synthesized with a variety of methods, such as surfactant based (Dahal and Chikan 2012;Tang et al 2004;Chaubey et al 2012;Tirosh and Markovich 2007), hydrothermal (Stefanic et al 2005), microwave assisted hydrothermal (Eliziario et al 2009), ultrasonically assisted hydrothermal (Meskin et al 2007), solvothermal (Pinna et al 2004;Pucci et al 2009;Boyle et al 2012;Buha et al 2010), precipitation ) and sonochemical synthesis . However, most of these methods are unfavorable because of a long reaction time, a broad size distribution, the agglomerated state of the particles or the large diameter.…”

Section: Introductionmentioning

confidence: 99%

Fast, microwave-assisted synthesis of monodisperse HfO2 nanoparticles

et al. 2013

View full text Add to dashboard Cite

A conventional solvothermal synthesis was compared to a microwave assisted method for the synthesis of HfO2 nanoparticles. In a microwave, the reaction could be completed in three hours, compared to three days in an autoclave. In the microwave synthesis the ensemble of particles was found to have a better size dispersion and a smaller average size (4 nm). The reaction mechanism was investigated and proof for an ether elimination process was provided. Post-synthetic modification with dopamine or dodecanoic acid permitted the suspension of the synthesized particles in both polar and apolar solvents, which is an advantage for further processing.keywords: Benzyl alcohol, microwave, ligand exchange, hafnium oxide 2

show abstract

Section: Introductionmentioning

confidence: 99%

Fast, microwave-assisted synthesis of monodisperse HfO2 nanoparticles

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Colloidal synthesis methods can produce defect concentrations that are far above those that could be found at equilibrium 13 due to the relatively low temperature limit of the organic solvents involved (350-400 C). In contrast to the successes in the preparation of size controlled colloidal transition metal-oxide nanocrystals, [14][15][16][17][18][19] colloidal alkaline earth oxide nanocrystals are particularly difficult to produce by wet colloidal techniques.…”

Section: -13mentioning

confidence: 99%

Highly defective MgO nanosheets from colloidal self-assembly

et al. 2011

View full text Add to dashboard Cite

“…However, Rao et al [12] and Abraham et al [13] did not observe ferromagnetism in undoped HfO 2 films prepared by pulsed-laser deposition or metal-organic chemical vapor deposition, and suggested that magnetism could develop as a result of metallic contamination. [13] Recently, using the nonequilibrium processing of HfO 2 nanorods, Tirosh and Markowich [14] claimed the creation of high-enough concentrations of cation vacancies and the realization of the predicted FM. Since the first discovery by Coey and coworkers, there has been an extensive effort to search for magnetism in other conventional nonmagnetic oxide systems.…”

mentioning

confidence: 99%