Journal
ACS NANO
Volume 6, Issue 2, Pages 1751-1756Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn204762w
Keywords
self-propulsion; nanofabrication; microjets; micromachines; catalytic motor; cell
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Funding
- Volkswagen Foundation [1/84 072]
- Alexander von Humboldt Foundation
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We describe nanoscale tools in the form of autonomous and remotely guided catalytically self-propelled InGaAs/GaAs/(Cr)Pt tubes. These rolled-up tubes with diameters in the range of 280-600 nm move in hydrogen peroxide solutions with speeds as high as 180 mu m s(-1). The effective transfer of chemical energy to translational motion has allowed these tubes to perform useful tasks such as transport of cargo. Furthermore, we observed that, while cylindrically rolled-up tubes move in a straight line, asymmetrically rolled-up tubes move In a corkscrew-like trajectory, allowing these tubes to drill and embed themselves into biomaterials. Our observations suggest that shape and asymmetry can be utilized to direct the motion of catalytic nanotubes and enable mechanized functions at the nanoscale.
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