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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 54: Poster Session 3

CPP 54.79: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Dendronized polymers replicated with graphene and graphene oxide — •Simone Dell'Elce¹, Vitalij Scenev¹, Baozhong Zhang², Nikolai Severin¹, Dieter Schlüter², and Jürgen P. Rabe¹ — ¹Department of Physics, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany — ²Laboratory of Polymer Chemistry, Department of Materials, ETH Zürich, Wolfgang Pauli Strasse 10, HCI J541, 8093 Zürich, Switzerland

Graphene has been demonstrated to be highly bendable and stretchable to follow the topography of a solid surface with the precision down to single macromolecules (N. Severin et al.,Nano Lett. 2011, 11, 2436). The question remains, inhowfar the locally strained graphene may have an impact on the conformation of the replicated macromolecules. Dendronized polymers (denpols) consist of a linear backbone surrounded by a dense cladding of structurally regular dendritic branches (dendrons), anchored to each repeating unit. Variation of the dendron generation allows to tune the properties of the denpols. We deposited denpols on an atomically flat mica substrate and covered them with either graphene or graphene oxide (GO) layers. Scanning force microscopy images reveal that the heights of the denpol replicas in GO match the heights of uncovered molecules. The heights of higher generation denpol replicas in graphene are substantially smaller as compared with the heights of the uncovered macromolecules.This may be attributed to graphene being stiffer than GO and more strongly interacting with the substrate, collapsing thereby to some extent the structure of the high generation denpols