Polymerization-Induced Epitaxy: Scanning Tunneling Microscopy of a Hydrogen-Bonded Sheet of Polyamide on Graphite

A molecularly thin film of a two-dimensional polymer network formed by hydrogen bonding was synthesized and investigated with scanning tunneling microscopy. Poly (ε-caprolactam) (nylon 6) was epitaxially grown on the basal plane of graphite and an ultrathin film of the polymer was obtained after the...

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Published in:Science (American Association for the Advancement of Science) 1992-10, Vol.258 (5081), p.441-443
Main Authors: Sano, Masahito, Sasaki, Darryl Y., Kunitake, Toyoki
Format: Article
Language:English
Subjects:
Amides
Applied sciences
Atoms
Crystal lattices
Crystallization
Epitaxy
Exact sciences and technology
Graphite
Hydrogen
Hydrogen bonding
Hydrogen bonds
Nitrogen
Organic polymers
Perpendicular lines
Physicochemistry of polymers
Polyesters
Polymerization
Polymers
Properties and characterization
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cited_by cdi_FETCH-LOGICAL-c725t-f97e6c8dfb99b9fe7a37ce8cb6338e15e2e36986e6cfb227df8966c1fcc1d87f3
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container_title Science (American Association for the Advancement of Science)
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creator Sano, Masahito
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description A molecularly thin film of a two-dimensional polymer network formed by hydrogen bonding was synthesized and investigated with scanning tunneling microscopy. Poly (ε-caprolactam) (nylon 6) was epitaxially grown on the basal plane of graphite and an ultrathin film of the polymer was obtained after the bulk materials had been washed away with solvents. The polymer chain has a planar, all-trans conformation and adjacent chains run in the antiparallel direction. This produces complete pairing of hydrogen bonding groups, with each amide group lying on a straight line perpendicular to the polymer backbone. This hydrogen-bonded sheet is oriented so that each polymer backbone lies in the (10$\bar{1}$0) direction on the graphite hexagonal lattice, as opposed to the (11$\bar{2}$0) direction taken by other paraffinic molecules studied so far. This experiment shows that hydrogen bonding can be used to control the orientation of macromolecules in two dimensions.
doi_str_mv 10.1126/science.258.5081.441
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source JSTOR-E-Journals; ProQuest - social science premium collection; Education Collection; Science Online科学在线
subjects Amides
Applied sciences
Atoms
Crystal lattices
Crystallization
Epitaxy
Exact sciences and technology
Graphite
Hydrogen
Hydrogen bonding
Hydrogen bonds
Nitrogen
Organic polymers
Perpendicular lines
Physicochemistry of polymers
Polyesters
Polymerization
Polymers
Properties and characterization
title Polymerization-Induced Epitaxy: Scanning Tunneling Microscopy of a Hydrogen-Bonded Sheet of Polyamide on Graphite
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