Microemulsion approach to neodymium, europium, and ytterbium oxide/hydroxide colloids—Effects of precursors and preparation parameters on particle size and crystallinity

Rill, Christoph; Bertagnolli, Helmut; Kickelbick, Guido

doi:10.1016/j.jcis.2008.05.008

Cited by 6 publications

(1 citation statement)

References 30 publications

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“…such as the direct chemical surface modification of the oxide, 11 and the formation of neodymium microemulsion from ionic surfactants. 12 Although the use of commercial polyelectrolytes to stabilize colloidal suspensions due to soft ionic adsorption (Figure 1) is a very common general trend in materials chemistry, the stabilization of neodymium oxide NPs in particular by this approach has not been reported in the literature because of the difficulty in soft ionic layering of charged polymers onto particles of the same size-scale as the polymer coils, which tend to desorb reversibly if not matched optimally to the underlying inorganic surface chemistry. Since neodymium oxide NPs possess a high natural surface charge which can be controlled with pH, further electrostatic stabilization via the self-assembly of polyelectrolytes to reverse and amplify is explored here.…”

Section: ' Introductionmentioning

confidence: 99%

Stabilization of Neodymium Oxide Nanoparticles via Soft Adsorption of Charged Polymers

Dorris

Sicard

Chen

et al. 2011

ACS Appl. Mater. Interfaces

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In this work, two synthetic polyelectrolytes, PSS and PAH, are employed as strong adsorbed surfactants to disperse and stabilize neodymium oxide nanoparticles. The acid-base equilibria of the oxide surfaces of the particles were investigated under different pH conditions in the absence and presence of polyelectrolytes, to optimize particle stabilization through enhancement of the effective repulsive surface charges. Surface charge amplification of a 3:5 ratio was achieved to permit improved particle transparency of 100-fold in visible wavelengths in neutral and acidic pH regimes, and a stable 10-fold surface charge amplification was achieved under basic pH conditions. The potential of polyelectrolytes as stabilizing agents for neodymium oxide NPs in large-scale particle physics experiments requiring extremely high optical transparency over long path length is evaluated based on optical absorbance and particle stability.

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Section: ' Introductionmentioning

confidence: 99%