Surface functionalisation of self-assembled quantum dot microlasers with a DNA aptamer
Charlton, Bethan K. and Downie, Dillon H. and Noman, Isaac and Urbano Alves, Pedro and Eling, Charlotte J. and Laurand, Nicolas (2023) Surface functionalisation of self-assembled quantum dot microlasers with a DNA aptamer. International Journal of Molecular Sciences, 24 (19). 14416. ISSN 1422-0067 (https://doi.org/10.3390/ijms241914416)
Preview |
Text.
Filename: Charltonet_al_IJMS_2023_Surface_functionalisation_of_self_assembled_quantum_dot_microlasers.pdf
Final Published Version License: Download (4MB)| Preview |
Abstract
The surface functionalisation of self-assembled colloidal quantum dot supraparticle lasers with a thrombin binding aptamer (TBA-15) has been demonstrated. The self-assembly of CdSSe/ZnS alloyed core/shell microsphere-shape CQD supraparticles emitting at 630 nm was carried out using an oil-in-water emulsion technique, yielding microspheres with an oleic acid surface and an average diameter of 7.3 ± 5.3 µm. Surface modification of the microspheres was achieved through a ligand exchange with mercaptopropionic acid and the subsequent attachment of TBA-15 using EDC/NHS coupling, confirmed by zeta potential and Fourier transform IR spectroscopy. Lasing functionality between 627 nm and 635 nm was retained post-functionalisation, with oleic acid- and TBA-coated microspheres exhibiting laser oscillation with thresholds as low as 4.10 ± 0.37 mJ·cm−2 and 7.23 ± 0.78 mJ·cm−2, respectively.
ORCID iDs
Charlton, Bethan K. ORCID: https://orcid.org/0009-0000-8484-3512, Downie, Dillon H. ORCID: https://orcid.org/0009-0005-0435-0344, Noman, Isaac, Urbano Alves, Pedro ORCID: https://orcid.org/0000-0003-3447-6878, Eling, Charlotte J. ORCID: https://orcid.org/0000-0002-3819-2728 and Laurand, Nicolas ORCID: https://orcid.org/0000-0003-0486-4300;-
-
Item type: Article ID code: 86767 Dates: DateEvent22 September 2023Published20 September 2023AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics
Faculty of Science > Physics > Institute of Photonics
Technology and Innovation Centre > PhotonicsDepositing user: Pure Administrator Date deposited: 22 Sep 2023 15:44 Last modified: 17 Sep 2024 00:47 URI: https://strathprints.strath.ac.uk/id/eprint/86767