SurfaceScience21 – wissenschaftliches Programm
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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 Fittolani2,4, Yang Yu2, Theodore Tyrikos-Ergas2,4, Martina Delbianco2, Stephan Rauschenbach1,3, Sabine Abb1, Peter Seeberger2,4, and Klaus Kern1,5 — 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.