Highly efficient visible blue-emitting black phosphorus quantum dot: Mussel-inspired surface functionalization for bioapplications

  • Miyeon Lee
  • , Young Ho Park
  • , Eun Bi Kang
  • , Ari Chae
  • , Yujin Choi
  • , Seongho Jo
  • , Yu Jin Kim
  • , Soo Jin Park
  • , Byunggak Min
  • , Tae Kyu An
  • , Jihoon Lee
  • , Su Il In
  • , Sang Youl Kim
  • , Sung Young Park
  • , Insik In

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

The preparation of blue-emitting black phosphorus quantum dots (BPQDs) is based on the liquid-phase exfoliation of bulk BP. We report the synthesis of soluble BPQDs showing a strong visible blue-light emission. Highly fluorescent (photoluminescence quantum yield of ~5% with the maximum emission (λmax) at ~437 nm) and dispersible BPQDs in various organic solvents are first prepared by simple ultrasonication of BP crystals in chloroform in the ambient atmosphere. Furthermore, simple mussel-inspired surface functionalization of BPQDs with catechol-grafted poly(ethylene glycol) in basic buffer afforded water-soluble blue-emitting BPQDs showing long-term fluorescence stability, very low cytotoxicity, and excellent fluorescence live cell imaging capability.

Original languageEnglish
Pages (from-to)7096-7105
Number of pages10
JournalACS Omega
Volume2
Issue number10
DOIs
StatePublished - 31 Oct 2017

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.

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