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Investigations on the Complex Rotations of Molecular Nanomachines

Kersell, Heath Ryan
http://orcid.org/0000-0002-6246-7680
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1307126123

Abstract Details

2011, Master of Science (MS), Ohio University, Physics and Astronomy (Arts and Sciences).
A single molecule level investigation of 4Fc3SEt molecular rotors was performed via ultrahigh vacuum low temperature scanning tunneling microscopy. The molecules were deposited on a Au(111) substrate and studied at 4.2 K and 77 K system temperatures. Previous studies on molecular rotors in this technique have presented rotor imaging, thermally induced "gear" mechanisms and, coupled rotor braking mechanisms. This study presents the first detailed analysis of inelastic electron tunneling induced stepwise rotation of a molecular rotor on a double decker system. Examination of molecular switching rates revealed stepwise switching of these rotors to be a single electron process. Additionally, examination of rotor geometry implied a tendency toward directional rotation under non-equilibrium circumstances, supported by attempted sequential switching of a rotor array blocked due to directionality. These results provide understanding of the detailed mechanism of rotation of 4Fc3SEt rotors and serve as a first step toward developing and understanding more complicated molecular machine systems, particularly those powered by such rotors as studied herein.
Saw-Wai Hla (Advisor)
Peter Jung (Committee Chair)
Phillips Daniel (Committee Member)
69 p.
Condensed Matter Physics; Molecules; Nanoscience; Nanotechnology
Molecular Rotor; Molecular Machine; Rotation Mechanism; Scanning Tunneling MIcroscopy; STM; Inelastic Electron Tunneling Spectroscopy; IETS

Recommended Citations

Citations

  • Kersell, H. R. (2011). Investigations on the Complex Rotations of Molecular Nanomachines [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1307126123

    APA Style (7th edition)

  • Kersell, Heath. Investigations on the Complex Rotations of Molecular Nanomachines. 2011. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1307126123.

    MLA Style (8th edition)

  • Kersell, Heath. "Investigations on the Complex Rotations of Molecular Nanomachines." Master's thesis, Ohio University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1307126123

    Chicago Manual of Style (17th edition)

ohiou1307126123
976
© 2011, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.