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Macromolecular Fractionation of Rod‐Like Polymers at Atomically Flat Solid–Liquid Interfaces
Author(s) -
Samorí P.,
Severin N.,
Müllen K.,
Rabe J. P.
Publication year - 2000
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(200004)12:8<579::aid-adma579>3.0.co;2-g
Subject(s) - macromolecule , polymer , materials science , graphite , fractionation , adsorption , chemical physics , chemical engineering , polymer science , nanotechnology , chromatography , organic chemistry , composite material , chemistry , biochemistry , engineering
Macromolecular fractionation of rod‐like polymers at solid–liquid interfaces is monitored by STM imaging of the polymer chains self‐assembled on graphite (see Figure). It is concluded that the competition between entropic losses and enthalpic gains favors the adsorption of the longest chains, which are still sufficiently straight. The phenomenon may be used to fractionate stiff polydisperse macromolecules.