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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.
Original language | English |
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Article number | 14416 |
Number of pages | 12 |
Journal | International Journal of Molecular Sciences |
Volume | 24 |
Issue number | 19 |
DOIs | |
Publication status | Published - 22 Sept 2023 |
Keywords
- colloidal quantum dots
- microsphere lasers
- whispering gallery mode laser
- surface functionalisation
- self-assembled supraparticles
- aptamers
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Dive into the research topics of 'Surface functionalisation of self-assembled quantum dot microlasers with a DNA aptamer'. Together they form a unique fingerprint.Projects
- 1 Active
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Lasers and photonics of the future: self-assembled optically active resonators (Research Leadership)
Laurand, N. (Principal Investigator)
1/10/20 → 30/09/25
Project: Research
Datasets
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Data for: "Surface Functionalisation of Self-Assembled Quantum Dot Microlasers with a DNA Aptamer"
Charlton, B. (Creator), Downie, D. (Contributor), Noman, I. (Contributor), dos Santos Alves, P. (Contributor), Eling, C. (Contributor) & Laurand, N. (Contributor), University of Strathclyde, 21 Sept 2023
DOI: 10.15129/d8b31125-23cb-4325-b136-38073dd6a4a6, https://www.mdpi.com/journal/ijms
Dataset