3 years ago

All-Aqueous Synthesis of Silica-Encapsulated Quantum Dots with Functional Shells

All-Aqueous Synthesis of Silica-Encapsulated Quantum Dots with Functional Shells
Huanhuan Feng, Joris Sprakel, Jan Bart ten Hove, Tingting Zheng, Aldrik H. Velders
We present a simple yet versatile method for encapsulating water-dispersed quantum dots (QDs) in a silica shell. As our approach, does not require ligand exchange, the colloidal stability of the quantum dots is maintained throughout the process, which results in monodisperse core-shell particles of individual quantum dots with a well-defined silica shell whose thickness can be accurately controlled. While other methods often result in a reduction of luminescence, our approach can retain all or even increases the quantum efficiency of the semiconductor dots. We also show how amine-functional groups can be expressed at the surface of the silica shell, while retaining QD photoluminescence properties, allowing further surface functionalization. Finally, we demonstrate the versatility of this strategy by including dopants into the silica shells to tailor the spectral response of the core-shell particles by energy transfer.A simple and all-aqueous method is presented to prepare core-shell quantum dots, encapsulated in a silica shell of tunable thickness, which can be functionalized with reactive groups and doped with energy transfer acceptors.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ejic.201700886

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.