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|a 10.1021/acs.langmuir.4c00596
|2 doi
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|a eng
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|a Tiwari, Appurva
|e verfasserin
|4 aut
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|a Characterizing the Microparticles Deposition Structure and its Photonic Nature in Surfactant-Laden Evaporating Colloidal Sessile Droplets
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|a Date Revised 23.04.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a This work presents a simple method to create photonic microstructures via the natural evaporation of surfactant-laden colloidal sessile droplets on a flat substrate. In the absence of dissolved surfactant, the evaporating colloidal droplet forms a well-known coffee ring deposition. In contrast, the presence of surfactant leads to the formation of multiple ring structures due to the repetitive pinning-depinning behavior of the droplet contact line (CL). It is found that the multiring structure shows vibrant iridescent structural colors while the coffee ring lacks a photonic nature. This difference in the structural color for the presence and absence of the surfactant is found to be dependent on the arrangement of the particles in the deposition structure. The particle arrangement in the multirings is monolayered and well-ordered. The ordering of the particles is strongly influenced by the particle dynamics, contact angle (CA), and CL dynamics of the evaporating colloidal solution droplet. Furthermore, the iridescent nature of the multiring deposition is demonstrated and explained. The dependence of the multiring deposition structure on the concentration of the dissolved surfactant and the suspended particles is also studied. The findings demonstrate that an intermediate surfactant concentration is desirable for the formation of a multiring structure. Further, the pinning-depinning CL dynamics that causes the formation of the multiring deposition structure is discussed. Finally, we demonstrate the applicability of the approach to smaller droplet volumes
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|a Journal Article
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|a Lee, Seong Jae
|e verfasserin
|4 aut
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|a Garg, Dhiraj Kumar
|e verfasserin
|4 aut
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|a Shin, Sehyun
|e verfasserin
|4 aut
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|a Thokchom, Ashish Kumar
|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 1992
|g 40(2024), 16 vom: 23. Apr., Seite 8711-8720
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|x 1520-5827
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| 773 |
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|g volume:40
|g year:2024
|g number:16
|g day:23
|g month:04
|g pages:8711-8720
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|u http://dx.doi.org/10.1021/acs.langmuir.4c00596
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