Molecular direction dependence of single-molecule conductance of a helical peptide in molecular junction
Literature Information
Hirotaka Uji, Tomoyuki Morita, Shunsaku Kimura
The helix-peptide dipole effect on single-molecule conductance was analysed experimentally and theoretically with a single 8mer helical peptide. The helical peptide was immobilized on a gold surface in two opposite directions of the helix dipole. Single-molecule conductance of the helical peptide was determined to be 2.4 × 10−5G0 by scanning tunneling microscopy (STM) break-junction measurements under the condition of applied bias voltage parallel to the dipole, which was about 1.2-fold larger than that in the anti-parallel direction. Theoretical calculation also supports that the helix dipole influences the electron transport reaction depending on parallel or anti-parallel orientation of the dipole against the applied electric field.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











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