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    Unimolecular Submersible Nanomachines. Synthesis, Actuation, and Monitoring

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    Author
    García-López, Víctor
    Chiang, Pinn-Tsong
    Chen, Fang
    Ruan, Gedeng
    Martí, Angel A.
    Kolomeisky, Anatoly B.
    Wang, Gufeng
    Tour, James M.
    Date
    2015
    Citation
    García-López, Víctor, Chiang, Pinn-Tsong, Chen, Fang, et al.. "Unimolecular Submersible Nanomachines. Synthesis, Actuation, and Monitoring." Nano Letters, 15, no. 12 (2015) 8229-8239. http://dx.doi.org/10.1021/acs.nanolett.5b03764.
    Published Version
    http://dx.doi.org/10.1021/acs.nanolett.5b03764
    Abstract
    Unimolecular submersible nanomachines (USNs) bearing light-driven motors and fluorophores are synthesized. NMR experiments demonstrate that the rotation of the motor is not quenched by the fluorophore and that the motor behaves in the same manner as the corresponding motor without attached fluorophores. No photo or thermal decomposition is observed. Through careful design of control molecules with no motor and with a slow motor, we found using single molecule fluorescence correlation spectroscopy that only the molecules with fast rotating speed (MHz range) show an enhancement in diffusion by 26% when the motor is fully activated by UV light. This suggests that the USN molecules give ?9 nm steps upon each motor actuation. A non-unidirectional rotating motor also results in a smaller, 10%, increase in diffusion. This study gives new insight into the light actuation of motorized molecules in solution.
    Keyword
    unimolecular submersible nanomachines; light-driven motor; diffusion coefficient; fluorophores
    Type
    Journal article
    Citable link to this page
    http://hdl.handle.net/1911/87817
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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892