ISPEC 10th INTERNATIONAL CONFERENCE ON ENGINEERING & NATURAL SCIENCES, Siirt, Turkey, 16 - 18 May 2021, pp.8-12
In materials science, to understand the formation and interaction of interfaces, nanostructures, defects etc., and their effect on the physical, chemical, mechanical and electrical behavior, information at the atomic level is clearly pertinent. In this context, forces between colloidal particles in suspensions play an important role for determining the properties in a variety of materials.
Atomic force microscopy (AFM) is an imaging technique used to determine topography and surface characteristics. It can also be used for measurements of forces such as adhesion, van der Waals, colloidal, capillary, magnetic and other forces.
Colemanite mineral is used in manufacturing of medical products, heat resistant glass, and cosmetic products to name a few among several of its applications. It is a hydrous calcium borate mineral that was found in four different regions of Turkey: Bigadic, Emet (Espey and Hisarcik), and Kestelek.
In this paper, AFM was employed to measure the colloidal interactions between silicon nitride (Si3N4) cantilever tip and colemanite crystal surfaces in 1% w/w colemanite-saturated aqueous solutions. Then, the obtained experimental force-distance curves were fitted to the Derjaguin-Landau-Verwey-Overbeek model (DLVO).
Keywords: Atomic force microscopy (AFM), Colemanite, DLVO