Abstract

A novel strategy for a directed nanoparticle coupling to isolated Stephanopyxis turris valves is presented. After pyrolysis, the valves exhibit incomplete wetting due to their characteristic T-shaped profiles as a prerequisite for a regioselective coupling reaction. A micromanipulation system allows for precise handling and their immobilization onto an adhesive substrate and manipulation into arrays.

Highlights

  • Diatoms[1] are an interesting and beautiful example of microand nanostructured materials occurring in nature

  • In contrast to the previously reported in situ preparation of NPs, we focused our present work to the attachment of pre-fabricated nanoparticles showing a narrow size distribution in combination with the obtained non-wetting behavior of the diatom valves a er pyrolysis

  • The inhibited penetration of aqueous solutions into the interior of diatom valves was successfully utilized for regioselective modi cation by NP coupling

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Summary

Introduction

Diatoms[1] are an interesting and beautiful example of microand nanostructured materials occurring in nature. Current research is focused either on transforming diatom biosilica into other, non-silicon materials[24,25,26,27,28,29,30] or the surface modi cation by deposition methods,[31] in situ NP synthesis[32,33,34,35] or the attachment of prefabricated NPs.[36,37,38,39] Here, we present a novel strategy which allows the regioselective coupling of prefabricated nanoparticles to diatom valves by employing the non-wetting behavior of pyrolyzed diatom valves.

Results
Conclusion

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