Exploring the retention properties of CaF2 nanoparticles as possible additives for dental care application with tapping-mode atomic force microscope in liquid.
Amplitude-modulation atomic force microscopy (AM-AFM) is used to determine the retention properties of CaF2 nanoparticles adsorbed on mica and on tooth enamel in liquid. From the phase-lag of the forced cantilever oscillation the local energy dissipation at the detachment point of the nanoparticle was determined. This enabled us to compare different as-synthesized CaF2 nanoparticles that vary in shape, size and surface structure. CaF2 nanoparticles are candidates for additives in dental care products as they could serve as fluorine-releasing containers preventing caries during a cariogenic acid attack on the teeth. We show that the adherence of the nanoparticles is increased on the enamel substrate compared to mica, independently of the substrate roughness, morphology and size of the particles.
Department of Physics, University of Basel, Klingelbergstrasse 82, Basel 4056, Switzerland.
Matthias
M
Wasem
Institute for Chemistry and Bioanalytics, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz 4132, Switzerland.
Joachim
J
Köser
GABA International AG, Grabetsmattweg, 4106 Therwil, Switzerland.
Sylvia
S
Hess
Instituto Madrileño de Estudios Avanzados, IMDEA Nanociencia, 28049 Madrid, Spain.
Enrico
E
Gnecco
Department of Physics, University of Basel, Klingelbergstrasse 82, Basel 4056, Switzerland.
Ernst
E
Meyer
AM-AFM in liquid; nanodentistry; nanoparticles