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The Molecule–Electrode Interface in Single‐Molecule Transistors
Author(s) -
Yu Hongbin,
Luo Yi,
Beverly Kristen,
Stoddart J. Fraser,
Tseng HsianRong,
Heath James R.
Publication year - 2003
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200352352
Subject(s) - electrode , conductance , molecule , transistor , asymmetry , interface (matter) , platinum , molecular electronics , chemical physics , chemistry , nanotechnology , physics , materials science , condensed matter physics , quantum mechanics , voltage , biochemistry , catalysis , gibbs isotherm
What's in the middle matters little! Differential conductance measurements made on single‐molecule rotaxanes and their precursor dumbbells in transistors with platinum electrodes reflect the molecule–electrode contacts rather than the middle section of the molecules (see diagram; the color reflects the conductance, with dark corresponding to zero current). Interface states dominate electron transport. Molecular signatures are masked and even constitutional asymmetry in the molecule is difficult to detect.