Micromotors Powered by Enzyme Catalysis

Krishna K. Dey, Xi Zhao, Benjamin M. Tansi, Wilfredo J. Méndez-Ortiz, Ubaldo M. Córdova-Figueroa, Ramin Golestanian, Ayusman Sen

Research output: Contribution to journalArticlepeer-review

119 Scopus citations

Abstract

Active biocompatible systems are of great current interest for their possible applications in drug or antidote delivery at specific locations. Herein, we report the synthesis and study of self-propelled microparticles powered by enzymatic reactions and their directed movement in substrate concentration gradient. Polystyrene microparticles were functionalized with the enzymes urease and catalase using a biotin-streptavidin linkage procedure. The motion of the enzyme-coated particles was studied in the presence of the respective substrates, using optical microscopy and dynamic light scattering analysis. The diffusion of the particles was found to increase in a substrate concentration dependent manner. The directed chemotactic movement of these enzyme-powered motors up the substrate gradient was studied using three-inlet microfluidic channel architecture.

Original languageEnglish (US)
Pages (from-to)8311-8315
Number of pages5
JournalNano letters
Volume15
Issue number12
DOIs
StatePublished - Dec 9 2015

All Science Journal Classification (ASJC) codes

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

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