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Encapsulation of cadmium-free InP/ZnSe/ZnS quantum dots in poly(LMA-co-EGDMA) microparticles via co-flow droplet microfluidics

Iurii Alekseevich Babkin, Aniket Pradip Udepurkar, Hannes Van Avermaet (UGent) , Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Zeger Hens (UGent) , Guy van den Mooter, Simon Kuhn and Christian Clasen
(2023) SMALL METHODS. 7(7).
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Abstract
Quantum dots (QDs) are semiconductor nanocrystals that are used in optoelectronic applications. Most modern QDs are based on toxic metals, for example Cd, and do not comply with the European Restriction of Hazardous Substances regulation of the European Union. Latest promising developments focus on safer QD alternatives based on elements from the III-V group. However, the InP-based QDs lack an overall photostability under environmental influences. One design path of achieving stability is through encapsulation in cross-linked polymer matrices with the possibility to covalently link the matrix to surface ligands of modified core-shell QDs. The work focuses on the formation of polymer microbeads suitable for InP-based QD encapsulation, allowing for an individual protection of QDs and an improved processibility via this particle-based approach. For this, a microfluidic based method in the co-flow regime is used that consists of an oil-in-water droplet system in a glass capillary environment. The generated monomer droplets are polymerized in-flow into poly(LMA-co-EGDMA) microparticles with embedded InP/ZnSe/ZnS QDs using a UV initiation. They demonstrate how a successful polymer microparticle formation via droplet microfluidics produces optimized matrix structures leading to a distinct photostability improvement of InP-based QDs compared to nonprotected QDs.
Keywords
cadmium-free quantum dots, droplet microfluidics, encapsulation, particle formation, photopolymerization, quantum dots, rheology, POLYMER BEADS, PHOTOPOLYMERIZATION, GENERATION, FABRICATION, PARTICLES, LIGHT, MICROBEADS, SIZE

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MLA
Babkin, Iurii Alekseevich, et al. “Encapsulation of Cadmium-Free InP/ZnSe/ZnS Quantum Dots in Poly(LMA-Co-EGDMA) Microparticles via Co-Flow Droplet Microfluidics.” SMALL METHODS, vol. 7, no. 7, 2023, doi:10.1002/smtd.202201454.
APA
Babkin, I. A., Udepurkar, A. P., Van Avermaet, H., de Oliveira-Silva, R., Sakellariou, D., Hens, Z., … Clasen, C. (2023). Encapsulation of cadmium-free InP/ZnSe/ZnS quantum dots in poly(LMA-co-EGDMA) microparticles via co-flow droplet microfluidics. SMALL METHODS, 7(7). https://doi.org/10.1002/smtd.202201454
Chicago author-date
Babkin, Iurii Alekseevich, Aniket Pradip Udepurkar, Hannes Van Avermaet, Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Zeger Hens, Guy van den Mooter, Simon Kuhn, and Christian Clasen. 2023. “Encapsulation of Cadmium-Free InP/ZnSe/ZnS Quantum Dots in Poly(LMA-Co-EGDMA) Microparticles via Co-Flow Droplet Microfluidics.” SMALL METHODS 7 (7). https://doi.org/10.1002/smtd.202201454.
Chicago author-date (all authors)
Babkin, Iurii Alekseevich, Aniket Pradip Udepurkar, Hannes Van Avermaet, Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Zeger Hens, Guy van den Mooter, Simon Kuhn, and Christian Clasen. 2023. “Encapsulation of Cadmium-Free InP/ZnSe/ZnS Quantum Dots in Poly(LMA-Co-EGDMA) Microparticles via Co-Flow Droplet Microfluidics.” SMALL METHODS 7 (7). doi:10.1002/smtd.202201454.
Vancouver
1.
Babkin IA, Udepurkar AP, Van Avermaet H, de Oliveira-Silva R, Sakellariou D, Hens Z, et al. Encapsulation of cadmium-free InP/ZnSe/ZnS quantum dots in poly(LMA-co-EGDMA) microparticles via co-flow droplet microfluidics. SMALL METHODS. 2023;7(7).
IEEE
[1]
I. A. Babkin et al., “Encapsulation of cadmium-free InP/ZnSe/ZnS quantum dots in poly(LMA-co-EGDMA) microparticles via co-flow droplet microfluidics,” SMALL METHODS, vol. 7, no. 7, 2023.
@article{01H2FYMDSRQS3XG5Q4TEAN18PV,
  abstract     = {{Quantum dots (QDs) are semiconductor nanocrystals that are used in optoelectronic applications. Most modern QDs are based on toxic metals, for example Cd, and do not comply with the European Restriction of Hazardous Substances regulation of the European Union. Latest promising developments focus on safer QD alternatives based on elements from the III-V group. However, the InP-based QDs lack an overall photostability under environmental influences. One design path of achieving stability is through encapsulation in cross-linked polymer matrices with the possibility to covalently link the matrix to surface ligands of modified core-shell QDs. The work focuses on the formation of polymer microbeads suitable for InP-based QD encapsulation, allowing for an individual protection of QDs and an improved processibility via this particle-based approach. For this, a microfluidic based method in the co-flow regime is used that consists of an oil-in-water droplet system in a glass capillary environment. The generated monomer droplets are polymerized in-flow into poly(LMA-co-EGDMA) microparticles with embedded InP/ZnSe/ZnS QDs using a UV initiation. They demonstrate how a successful polymer microparticle formation via droplet microfluidics produces optimized matrix structures leading to a distinct photostability improvement of InP-based QDs compared to nonprotected QDs.}},
  articleno    = {{2201454}},
  author       = {{Babkin, Iurii Alekseevich and  Udepurkar, Aniket Pradip and Van Avermaet, Hannes and  de Oliveira-Silva, Rodrigo and  Sakellariou, Dimitrios and Hens, Zeger and  van den Mooter, Guy and  Kuhn, Simon and  Clasen, Christian}},
  issn         = {{2366-9608}},
  journal      = {{SMALL METHODS}},
  keywords     = {{cadmium-free quantum dots,droplet microfluidics,encapsulation,particle formation,photopolymerization,quantum dots,rheology,POLYMER BEADS,PHOTOPOLYMERIZATION,GENERATION,FABRICATION,PARTICLES,LIGHT,MICROBEADS,SIZE}},
  language     = {{eng}},
  number       = {{7}},
  pages        = {{18}},
  title        = {{Encapsulation of cadmium-free InP/ZnSe/ZnS quantum dots in poly(LMA-co-EGDMA) microparticles via co-flow droplet microfluidics}},
  url          = {{http://doi.org/10.1002/smtd.202201454}},
  volume       = {{7}},
  year         = {{2023}},
}
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