Sticking particles to solid surfaces using Moringa oleifera proteins as a glue
Journal article, 2018

Experimental studies have been made to test the idea that seed proteins from Moringa oleifera which are novel, natural flocculating agents for many particles could be used to promote adhesion at planar interfaces and hence provide routes to useful nanostructures. The proteins bind irreversibly to silica interfaces. Surfaces that had been exposed to protein solutions and rinsed were then exposed to dispersions of sulfonated polystyrene latex. Atomic force microscopy was used to count particle density and identified that the sticking probability was close to 1. Measurements with a quartz crystal microbalance confirmed the adhesion and indicated that repeated exposures to solutions of Moringa seed protein and particles increased the coverage. Neutron reflectivity and scattering experiments indicate that particles bind as a monolayer. The various results show that the 2S albumin seed protein can be used to fix particles at interfaces and suggest routes for future developments in making active filters or improved interfaces for photonic devices.

Adhesion

Quartz

Moringa oleifera

Surface scattering

Latex particles

Author

Shirin Nouhi

Uppsala University

Marc Pascual

Uppsala University

Gulliver

Maja S. Hellsing

Uppsala University

Habauka M. Kwaambwa

Namibia University of Science and Technology

Maximilian W.A. Skoda

Rutherford Appleton Laboratory

Fredrik Höök

Chalmers, Physics, Biological Physics

Adrian R. Rennie

Uppsala University

Colloids and Surfaces B: Biointerfaces

0927-7765 (ISSN)

Vol. 168 68-75

Strain balanced nitride heterostructures with large conduction band offset

Swedish Research Council (VR), 2010-01-01 -- 2012-12-31.

Subject Categories

Physical Chemistry

Other Chemistry Topics

Biophysics

DOI

10.1016/j.colsurfb.2018.01.004

More information

Latest update

7/4/2018 1