Magnetically controlled anisotropic light emission of DNA-functionalized supraparticles


ERDEM T., Zupkauskas M., O'Neill T., Cassiagli A., Xu P., ALTINTAS Y., ...More

MRS BULLETIN, 2022 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2022
  • Doi Number: 10.1557/s43577-022-00352-z
  • Journal Name: MRS BULLETIN
  • Journal Indexes: Science Citation Index Expanded, Scopus, PASCAL, Applied Science & Technology Source, INSPEC
  • Keywords: DNA-driven self-assembly, Nanoparticles, Supraparticles, Semiconductor nanocrystals, Metal nanoparticles, Magnetic nanoparticles, QUANTUM DOTS, NANOPARTICLES, DESIGN, RED

Abstract

In this article, we show the DNA-functionalization of supraparticles, form their network, and manipulate the optical features of these networks by applying a magnetic field. We start with preparing the supraparticles (SPs) of semiconducting InP/ZnSeS/ZnS quantum dots (QDs), plasmonic silver nanoparticles, and superparamagnetic iron oxide nanoparticles. These SPs are prepared by employing azide-functionalized amphiphilic diblock or triblock copolymers as well as by using their combinations. Subsequently, we attached single-stranded DNAs to these SPs by employing copper-free click chemistry. Next, we hybridized DNA-coated QD SPs with the iron oxide SPs and formed a network. By applying a magnetic field, we restructured this network such that the iron oxide SPs are aligned. This led to an anisotropic emission from the QD SPs with a polarization ratio of 1.9. This study presents a proof-of-concept scheme to control the optical features of a self-assembled supraparticle system using an external interaction. We believe that our work will further contribute to the utilization of smart self-assembly techniques in optics and photonics.