Controlling the Emission Properties of Quantum Rods via Multiscale 3D Ordered Organization

A specific organization of optically active nanoscale objects can greatly affect the optical response of a system. Here, we report the controlled modification of the fluorescent emission by the assembly of water-soluble quantum rods (QRs). Our study combines optical, electron microcopy, and X-ray sc...

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Bibliographic Details
Published in:Journal of nanomaterials 2021-11, Vol.2021, p.1-9
Main Authors: Bizien, Thomas, Postic, Marie, Even-Hernandez, Pascale, Panizza, Pascal, Mériadec, Cristelle, Meneau, Florian, Mazari-Arrighi, Elsa, Dupuis, Christophe, Gosse, Charlie, Cotlet, Mircea, Gang, Oleg, Marchi, Valérie, Artzner, Franck
Format: Article
Language:English
Subjects:
Aspect ratio
Chemical Sciences
Doppler effect
Emission analysis
Emissions control
Fluorescence
Ligands
Morphology
Nanomaterials
Nanoparticles
Optical activity
Optical properties
Physics
Polymorphism
Quantum dots
Red shift
Rods
Scanning electron microscopy
Self-assembly
Silicon wafers
X-ray scattering
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Summary:A specific organization of optically active nanoscale objects can greatly affect the optical response of a system. Here, we report the controlled modification of the fluorescent emission by the assembly of water-soluble quantum rods (QRs). Our study combines optical, electron microcopy, and X-ray scattering characterizations to reveal a correlation between the self-assembly behavior of QRs into ordered 3D-arrays and the optical properties (luminescence) of formed assemblies, where the observed optical response is highly dependent on the QR aspect ratio. Specifically, shorter, 18 nm long QRs (QR18), exhibiting a well-defined smectic packing, demonstrate an enhancement of the emission intensity accompanied by a red shift and a lifetime reduction. In contrast, 40 nm long QRs (QR40), forming a columnar phase, does not show these optical properties.
ISSN:1687-4110
1687-4129
DOI:10.1155/2021/1790976