Bioinspired Spiky Micromotors Based on Sporopollenin Exine Capsules

Hong Wang, Michael G. Potroz, Joshua A. Jackman, Bahareh Khezri, Tijana Marić, Nam Joon Cho, Martin Pumera

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

The development of a micromotor with unique spiky morphology based on sporopollenin exine capsules (SECs) is reported here. A widely abundant natural material extracted from sunflower pollen grains, the SECs are physically robust, highly monodisperse microcapsules that are ornamented with spiky appendages, opening the door to exploring bubble generation on this unique biomaterial surface. Partial platinum coating on the SEC surface enables catalytic decomposition of hydrogen peroxide that leads to bubble-propelled motion of individual SECs. Moreover, the hollow capsule architecture provides a large internal cavity for macromolecular encapsulation, as demonstrated here by the loading and transport of bovine serum albumin. Taking advantage of the sporopollenin biopolymer's capacity for heavy metal binding, it is further demonstrated that fluid mixing induced by the motion and bubble generation of the SEC micromotors dramatically improves heavy metal binding and removal. The bioinspired micromotors combine the advantageous properties of SECs with autonomous motion ability, resulting in a multifunctional platform for drug delivery and water purification applications.

Original languageEnglish
Article number1702338
JournalAdvanced Functional Materials
Volume27
Issue number32
DOIs
Publication statusPublished - 2017 Aug 25

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Wang, H., Potroz, M. G., Jackman, J. A., Khezri, B., Marić, T., Cho, N. J., & Pumera, M. (2017). Bioinspired Spiky Micromotors Based on Sporopollenin Exine Capsules. Advanced Functional Materials, 27(32), [1702338]. https://doi.org/10.1002/adfm.201702338