期刊
NANO LETTERS
卷 8, 期 5, 页码 1271-1276出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl072275j
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资金
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [820404] Funding Source: National Science Foundation
Autonomous micro- and nanomotors should, in principle, deliver materials in a site-directed fashion, powering the assembly of dynamic, nonequilibrium superstructures. Here we demonstrate that catalytic Pt-Au nanomotors can transport a prototypical cargo: polystyrene microspheres. In addition, motors with NI segments can overcome both Brownian orientational fluctuations and biased rotation of the rod-sphere doublet to enable persistent steerable uniaxial motion in an external magnetic field. Assuming a cargo-independent motive force, the speeds are inversely proportional to the Stokes resistance, which we compute using a completed double-layer boundary integral equation. In addition, we demonstrate motors transporting cargo via chemotaxis toward a H2O2 fuel source.
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