Macroscopic transport by synthetic molecular machines - PubMed (original) (raw)
doi: 10.1038/nmat1455. Epub 2005 Aug 28.
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- PMID: 16127455
- DOI: 10.1038/nmat1455
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Macroscopic transport by synthetic molecular machines
José Berná et al. Nat Mater. 2005 Sep.
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Abstract
Nature uses molecular motors and machines in virtually every significant biological process, but demonstrating that simpler artificial structures operating through the same gross mechanisms can be interfaced with-and perform physical tasks in-the macroscopic world represents a significant hurdle for molecular nanotechnology. Here we describe a wholly synthetic molecular system that converts an external energy source (light) into biased brownian motion to transport a macroscopic cargo and do measurable work. The millimetre-scale directional transport of a liquid on a surface is achieved by using the biased brownian motion of stimuli-responsive rotaxanes ('molecular shuttles') to expose or conceal fluoroalkane residues and thereby modify surface tension. The collective operation of a monolayer of the molecular shuttles is sufficient to power the movement of a microlitre droplet of diiodomethane up a twelve-degree incline.
Comment in
- Molecular motors: drop in attendance at motor show.
Fitzmaurice D. Fitzmaurice D. Nat Mater. 2005 Sep;4(9):657. doi: 10.1038/nmat1472. Nat Mater. 2005. PMID: 16136159 No abstract available.
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