ArticleNature nanotechnology2014
A surface-bound molecule that undergoes optically biased Brownian rotation.
Article in Nature nanotechnology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Orientation distributions of vacuum-deposited organic emitters revealed by single-molecule microscopy.Nature communications · 2023Article
- Article
- Design, Synthesis, and Isomerization Studies of Light-Driven Molecular Motors for Single Molecular Imaging.The Journal of organic chemistry · 2018Article
- Potassium-Ion-Selective Fluorescent Sensors To Detect Cereulide, the Emetic Toxin ofChemistryOpen · 2017Article
- Article
- Single Molecule Nanospectroscopy Visualizes Proton-Transfer Processes within a Zeolite Crystal.Journal of the American Chemical Society · 2016Article
- Instantaneous ballistic velocity of suspended Brownian nanocrystals measured by upconversion nanothermometry.Nature nanotechnology · 2016Article
- Determining the rotational mobility of a single molecule from a single image: a numerical study.Optics express · 2015Article
- Charge-dependent transport switching of single molecular ions in a weak polyelectrolyte multilayer.Langmuir : the ACS journal of surfaces and colloids · 2014Article
Corrections and comments
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Authors and funding
14 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Developing molecular systems with functions analogous to those of macroscopic machine components, such as rotors, gyroscopes and valves, is a long-standing goal of nanotechnology. However, macroscopic analogies go only so far in predicting function in nanoscale environments, where friction dominates over inertia. In some instances, ratchet mechanisms have been used to bias the ever-present random, thermally driven (Brownian) motion and drive molecular diffusion in desired directions. Here, we visualize the motions of surface-bound molecular rotors using defocused fluorescence imaging, and observe the transition from hindered to free Brownian rotation by tuning medium viscosity. We show that the otherwise random rotations can be biased by the polarization of the excitation light field, even though the associated optical torque is insufficient to overcome thermal fluctuations. The biased rotation is attributed instead to a fluctuating-friction mechanism in which photoexcitation of the rotor strongly inhibits its diffusion rate.
Identifiers
24441983What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.