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Electronic origin of scanning tunneling microscopy images and carbon skeleton orientations of normal alkanes adsorbed on graphite
Author(s) -
Liang Weigen,
Whangbo MyungHwan,
Wawkuschewski Aleksander,
Cantow HansJoachim,
Magonov Sergei N.
Publication year - 1993
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/adma.19930051106
Subject(s) - graphite , materials science , scanning tunneling microscope , adsorption , orientation (vector space) , chemical physics , carbon fibers , alkane , molecule , surface (topology) , crystallography , nanotechnology , hydrocarbon , organic chemistry , composite material , chemistry , geometry , mathematics , composite number
STM images of organic insulating molecules adsorbed on conducting substrates can only be understood if their electronic origin is known. Images of normal alkanes on graphite (n‐C 36 H 74 ) is shown in the Figure are interpreted here on the basis of their partial electron density plots ρ(r 0 ,e f ), demonstrating that the linear alkanes can “tumble” and change their orientation with respect to the graphite surface.