2-7 September 2018
Europe/Warsaw timezone

Mica Surface Properties Investigated by Force Spectroscopy

6 Sep 2018, 15:00
3h

Speaker

Dr. Jakub Barbasz (Instytut Katalizy i Fizyochemii Powierzchni im. Jerzego Habera PAN)

Description

Mica (muscovite) is a substrate commonly used for TEM and AFM imaging because of its atomic flatness, high cleavage and transparency. This aluminosilicate has sheet structure. Crystallographic structure of mica consists of two layers of Si and Al tetrahedrals and one Al octahedral sublayer between them.1,2 Force spectroscopy technique was used to determine physicochemical properties such as adhesion between the AFM probe and the surface, Young’s Moduli, deformation depth and the surface stiffness. In this work adhesion forces were measured in different conditions (air or NaCl solution with ionic strengths range of 0.001 – 0.15 M). The velocities of AFM tip withdrawal were in the range of 0.02 – 5 μm s-1. The main goal of these experiments was finding correlation between physiochemical properties and environmental conditions. References 1. Christenson, H. K. & Thomson, N. H. The nature of the air-cleaved mica surface. Surf. Sci. Rep. 71, 367–390 (2016). 2. De Poel, W. et al. Muscovite mica: Flatter than a pancake. Surf. Sci. 619, 19–24 (2014). Acknowledgements: I acknowledge the support of InterDokMed project no. POWR.03.02.00-00-I013/16

Primary author

Mrs. Agnieszka Kurek (Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences)

Co-authors

Ms. Beata Cieniawska (Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences) Dr. Jakub Barbasz (Instytut Katalizy i Fizyochemii Powierzchni im. Jerzego Habera PAN) Dr. Kamila Sofinska (Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences)

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