Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 9, Pages 3357-3365Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200515q
Keywords
neodymium oxide; nanoparticles; poly(4-styrene sulfonate); polyelectrolyte stabilization; self-assembly of polyelectrolytes; rare-earth elements; neutrino detection materials
Funding
- NSERC Canada
- CSACS the Centre for Self-Assembled Chemical Structures McGill
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In this work, two synthetic polyelectrolytes, PSS and PAM, 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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