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Synthesis with Single Macromolecules: Covalent Connection between a Neutral Dendronized Polymer and Polyelectrolyte Chains as well as Graphene Edges
Author(s) -
Barner Jörg,
AlHellani Rabie,
Schlüter A. Dieter,
Rabe Jürgen P.
Publication year - 2010
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200900438
Subject(s) - polyelectrolyte , graphite , polymer , graphene , materials science , macromolecule , covalent bond , side chain , azide , molecule , polymer chemistry , nanotechnology , chemical engineering , chemistry , organic chemistry , composite material , biochemistry , engineering
Abstract Single chains of a neutral, dendronized polymer with peripheral azide groups ( PG3A ) are co‐deposited onto molecularly modified graphite substrates with a positively charged dendronized polymer ( PG2 ) as well as with negatively charged plasmid ds DNA. PG3A is also prepared near graphite step‐edges. Single PG3A chains are moved with a scanning force microscope tip, into close contact with either of the two polyelectrolytes, as well as the step‐edge at predetermined positions. Treating these structures in situ with UV light leads to photochemically induced cross‐linking between the PG3A chains carrying azide groups and PG2 , ds DNA, and graphite step‐edges, respectively, which is proven by mechanically challenging the “welding” points by pulling on the molecules with the SFM‐tip.