Measuring the Accessible Surface Area within the Nanoparticle Corona Using Molecular Probe Adsorption.

ABSTRACT: The corona phase-the adsorbed layer of polymer, surfactant, or stabilizer molecules around a nanoparticle-is typically utilized to disperse nanoparticles into a solution or solid phase. However, this phase also controls molecular access to the nanoparticle surface, a property important for catalytic activity and sensor applications. Unfortunately, few methods can directly probe the structure of this corona phase, which is subcategorized as either a hard, immobile corona or a soft, transient corona in exchange with components in the bulk solution. In this work, we introduce a molecular probe adsorption (MPA) method for measuring the accessible nanoparticle surface area using a titration of a quenchable fluorescent molecule. For example, riboflavin is utilized to measure the surface area of

SUBMITTER: Park M 

PROVIDER: S-EPMC7206615 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature