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

Nanoscale
Thomas A SwiftThomas A A Oliver

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.

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Citations

Jul 28, 2020·Nanomaterials·Filip KvetonJan Tkac
Aug 20, 2020·The New Phytologist·Thomas A SwiftHeather M Whitney
May 13, 2021·Nature Communications·Francesco RigodanzaMaurizio Prato
May 11, 2021·International Journal of Polymeric Materials·Behrad GhiasiMichael R Hamblin
Aug 28, 2021·Nanomaterials·Mattia GhirardelloM Carmen Galan

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Methods Mentioned

BETA
infrared spectroscopy
X-ray
AFM
fluorescence spectroscopy

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