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Seshadri S, Bailey SJ, Zhao L, Fisher J, Sroda M, Chiu M, Stricker F, Valentine MT, Read de Alaniz J, Helgeson ME. Influence of Polarity Change and Photophysical Effects on Photosurfactant-Driven Wetting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9939-9951. [PMID: 34370465 DOI: 10.1021/acs.langmuir.1c00769] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Photosurfactants have shown considerable promise for enabling stimuli-responsive control of the properties and motion of fluid interfaces. Recently, a number of photoswitch chemistries have emerged to tailor the photoresponsive properties of photosurfactants. However, systematic studies investigating how photoresponsive surfactant behavior depends on the photochemical and photophysical properties of the switch remain scarce. In this work, we develop synthetic schemes and surfactant designs to produce a well-controlled library of photosurfactants to comparatively assess the behavior of photoswitch chemistry on interfacial behavior. We employ photoinduced spreading of droplets at fluid interfaces as a model for such studies. We show that although photosurfactant response is largely guided by expected trends with changes in polarity of the photoswitch, interfacial behavior also depends nontrivially and sometimes counter-intuitively on the kinetics and mechanisms of photoswitching, particularly at the interface of two solvents, as well as on complex interactions with other surfactants. Understanding these complexities enables the design of new photosurfactant systems and their optimization toward responsive functions including triggered spreading, dewetting, and destabilization of droplets on solid and fluid surfaces.
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Affiliation(s)
- Serena Seshadri
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Sophia J Bailey
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Lei Zhao
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Julia Fisher
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Miranda Sroda
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Michelle Chiu
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Friedrich Stricker
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Megan T Valentine
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Javier Read de Alaniz
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Matthew E Helgeson
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
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Nepomnyashchy A. Droplet on a liquid substrate: Wetting, dewetting, dynamics, instabilities. Curr Opin Colloid Interface Sci 2021. [DOI: 10.1016/j.cocis.2020.101398] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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