Catalytic motors for transport of colloidal cargo

Shakuntala Sundararajan, Paul E. Lammert, Andrew W. Zudans, Vincent H. Crespi, Ayusman Sen

Research output: Contribution to journalArticle

250 Citations (Scopus)

Abstract

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 -layer boundary integral equation. In addition, we demonstrate motors transporting cargo via chemotaxis toward a H 2O 2 fuel source.

Original languageEnglish (US)
Pages (from-to)1271-1276
Number of pages6
JournalNano letters
Volume8
Issue number5
DOIs
StatePublished - May 1 2008

Fingerprint

cargo
Micromotors
Boundary integral equations
Polystyrenes
Microspheres
micromotors
Magnetic fields
integral equations
boundary layers
polystyrene
rods
assembly
magnetic fields

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Sundararajan, Shakuntala ; Lammert, Paul E. ; Zudans, Andrew W. ; Crespi, Vincent H. ; Sen, Ayusman. / Catalytic motors for transport of colloidal cargo. In: Nano letters. 2008 ; Vol. 8, No. 5. pp. 1271-1276.
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Catalytic motors for transport of colloidal cargo. / Sundararajan, Shakuntala; Lammert, Paul E.; Zudans, Andrew W.; Crespi, Vincent H.; Sen, Ayusman.

In: Nano letters, Vol. 8, No. 5, 01.05.2008, p. 1271-1276.

Research output: Contribution to journalArticle

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