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241129s2024 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.4c03486
|2 doi
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|a eng
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| 100 |
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|a Vu-Minh, Tu
|e verfasserin
|4 aut
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|a Self-Assembly of Colloidal Dumbbell Isomers and Plasmonic Properties for Optical Metamaterials
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|c 2024
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 10.12.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a In this study, we explore the self-assembly of various colloidal symmetric dumbbell (DB) isomers, including dipole Janus, cis-Janus, trans-Janus, apolar-inward and polar-inward perpendicular Janus, and alternating perpendicular Janus DBs. Using dissipative particle dynamics (DPD) simulations under conditions mimicking experimental setups, we investigate cluster formation driven by emulsion droplet evaporation. Our findings reveal a diverse set of cluster structures, which are in good agreement with experimental and simulation results reported in the literature while also predicting the formation of novel cluster configurations. These structures, characterized by well-defined and predictable patterns, are potentially applicable to creating colloidal molecules and crystals. Furthermore, we examine the dynamics of cluster formation to gain insight into the mechanisms guiding the self-assembly of these diverse colloidal DBs. The study highlights the impact of particle isomerism on the resulting assembly structures. We further select a set of typical nanoclusters obtained, including a tetrahedral cluster, which is the simplest, to study its plasmonic properties. Our findings indicate that increasing the nanoparticle (NP) radius or decreasing the gap between NPs leads to a red shift in the plasmonic resonance wavelength and enhances the resonance strength. We identify critical parameter regions where the electric-dipole and magnetic-dipole resonances can be engineered to achieve negative dielectric permittivity and magnetic permeability, which are essential for developing negative-index metamaterials
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|a Journal Article
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1 |
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|a Tran-Manh, Cuong
|e verfasserin
|4 aut
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|a Pham-Van, Hai
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 40(2024), 49 vom: 10. Dez., Seite 26041-26054
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|g year:2024
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|g pages:26041-26054
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|u http://dx.doi.org/10.1021/acs.langmuir.4c03486
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