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O: Fachverband Oberflächenphysik

O 102: Poster Session VIII: Organic molecules on inorganic substrates: electronic, optical and other properties IV

O 102.2: Poster

Donnerstag, 4. März 2021, 13:30–15:30, P

Identifying the Origin of Local Flexibility in a Carbohydrate Polymer — •Kelvin Anggara¹, Yuntao Zhu², Giulio Fittolani^2,4, Yang Yu², Theodore Tyrikos-Ergas^2,4, Martina Delbianco², Stephan Rauschenbach^1,3, Sabine Abb¹, Peter Seeberger^2,4, and Klaus Kern^1,5 — ¹Max Planck Institute for Solid State Research — ²Max Planck Institute for Colloids and Interfaces — ³University of Oxford — ⁴Freie Universität Berlin — ⁵École Polytechnique Fédérale de Lausanne

Correlating structures and properties of a polymer to its monomer sequence is key to understand how its higher hierarchy structures are formed and how its macroscopic material properties emerge. Carbohydrate polymers, such as cellulose and chitin, are the most abundant materials found in nature whose structures and properties have only been characterized at sub-micrometer level. Here, by imaging single cellulose chains at nanoscale, we determine the structure and local flexibility of cellulose as a function of its sequence (primary structure) and conformation (secondary structure). Changing the primary structure by chemical substitutions and geometrical variations in the secondary structure allow the chain flexibility to be engineered at the single linkage level. Tuning local flexibility opens opportunities for the bottom-up design of carbohydrate materials.