6533b823fe1ef96bd127e356
RESEARCH PRODUCT
On the origin of the halo stabilization
Martin TrulssonBo JönssonChristophe Labbezsubject
ZirconiumRange (particle radiation)Monte Carlo methodPhysics::OpticsGeneral Physics and Astronomychemistry.chemical_elementNanoparticle02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencessymbols.namesakeAdsorptionchemistryChemical physicsTheoretical chemistrysymbolsHalo[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]Physical and Theoretical Chemistryvan der Waals forceAtomic physics0210 nano-technologyComputingMilieux_MISCELLANEOUSdescription
Monte Carlo simulations show that charge-regulation alone can cause highly charged zirconium nanoparticles to adsorb to a similarly charged or neutral silica particle and thereby stabilizing the latter. This mechanism, referred to as halo stabilization, is quite general and applicable in a range of systems provided that pH, van der Waals forces, and dissociation constants of the charge-regulating particles are properly chosen. In our modeling we see an overall attraction at low volume fractions of nanoparticles, while at higher a repulsive barrier is created, stabilizing the microparticles and protecting them from aggregation. The charge-regulation mechanism also turns the silica surface from positively charged, without nanoparticles, to negatively charged in the presence of nanoparticles.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-11-23 |