Surface functionalisation significantly changes the physical and electronic properties of carbon nano-dots

Thomas Swift, Marta Duchi, Stephen Hill, David Benito-Alifonso, Robert Harniman, Sadiyah Sheikh, Sean Davis, Annela Seddon, Heather Whitney, Carmen Galan*, Thomas A A Oliver

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)
384 Downloads (Pure)

Abstract

Biomolecule functionalisation of carbon nano-dots (CDs) greatly enhances their biocompatibility and applicability, however, little is known about their molecular structure. Using an arsenal of spectroscopic and analytical techniques, we provide new insights into the physical and electronic structure of uncoated and glycan-functionalised CDs. Our studies reveal that surface functionalisation does not always result in a homogenous corona surrounding the core, and the choice of carbohydrate significantly affects the electronic structure of the surface CD states. Further, the average surface coverage of an ensemble of CDs can be probed via transient absorption spectroscopy. These findings have implications for CDs targeted at interactions with biological systems or local sensors.
Original languageEnglish
Pages (from-to)13908-13912
Number of pages5
JournalNanoscale
Volume10
Issue number29
Early online date10 Jul 2018
DOIs
Publication statusPublished - 7 Aug 2018

Structured keywords

  • BCS and TECS CDTs

Keywords

  • Carbon dots
  • Nanomaterials
  • Ultrafast Spectroscopy
  • Atomic Force Microscopy

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