Determination of the position of azobenzene-modified silica particles at air-liquid interface using neutron reflectometry
The possibility to destabilise a stable emulsion on demand is pivotal for their formulations in many industrial applications. Recently, we develop an innovative light-responsive water/oil Pickering emulsion based on azobenzene-modified silica particles as the stabiliser. A key aspect that must be known is where the particle sits at the interface. This will allow us to predict a-priori which kind of emulsion (oil-in-water or vice-versa) and how stable it will be. Since the particle adsorption and its position with respect to the interface depends on the irradiation light, it is pivotal to probe it in-situ. This makes most of the available techniques not suitable since they all require the deposition and treatment of the particles. Here we propose to use neutron reflectometry to access the particle position at air-water and air-oil interfaces. We will perform measurements at different contrasts and fit the data with model based on a combination of slabs, Gaussian and Log-normal curves.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
Andrea Scotti; AVERY Jack; Rachel C. Evans; GUTFREUND Philipp; Judith E. Houston and P. Sánchez-Puga. (2023). Determination of the position of azobenzene-modified silica particles at air-liquid interface using neutron reflectometry. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1768
This data is not yet public
This data is not yet public
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