Saurav Kumar
(Indian Institute of Technology Guwahati)
;
Nishanta Barman
(Indian Institute of Technology Guwahati)
;
Angana Borbora
(Indian Institute of Technology Guwahati)
;
Priyam Mondal
(Indian Institute of Technology Guwahati)
;
Mizuki Tenjimbayashi
(Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science
)
;
Uttam Manna
(Indian Institute of Technology Guwahati)
Collection
Citation
Description:
(abstract)Non-sticking millimetric droplets wrapped with micron/submicron-sized liquid repellent solid particles and aggregates are recognized as liquid marbles (LMs). LM behaves like a non-wetting solid which enables zeroloss transportation on solid surface and liquid pool. The challenge is controlling the liquid-releasing behavior, especially on the liquid pool. For example, releasing the inner liquid of LM at a specified time in adaptation to the liquid pool condition has not been achieved. In the past, different approaches were introduced to demonstrate instant release of inner liquid in presence of a specific stimulus—but the report on controlling the lifetime of floating LMs in presence of a stimulus is extremely rare in the literature. In this context, an inherently porous and crystalline nanomaterial, i.e., metal organic framework (MOF) is rationally transformed into a readily chemically reactive nanomaterial for associating both a) dual pH-responsive hydrophobicity and b) non-responsive superhydrophobicity through a 1,4-conjugate addition reaction. Further, the Kang-Jacobi wettability model was applied to examine the wettability transition of modified MOFs at various pH. The hydrophobic MOFs yielded LMs with the ability to automatically release inner liquid at a pre-defined time without requiring external intervention. Furthermore, the strategic association of protonizable amine, labile coordination bond and tailored hydrophobicity attributed to dual (acidic/alkaline) stimuli responsive adjustable life time of LMs on water pool. Such LMs were utilized for demonstrating 1) adjustable drug-release, 2) on-demand release of reactants to perform chemical reactions and 3) rapid optode detection of NO2 - .
Rights:
Keyword: Liquid marble
Date published: 2023-12-20
Publisher: Royal Society of Chemistry
Journal:
- Journal of Materials Chemistry A (ISSN: 20507496) vol. 12 p. 3362-3372
Funding:
Manuscript type: Author's version (Accepted manuscript)
MDR DOI: https://doi.org/10.48505/nims.4428
First published URL: https://doi.org/10.1039/D3TA06238D
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Other identifier(s):
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Updated at: 2024-12-20 16:31:09 +0900
Published on MDR: 2024-12-20 16:31:09 +0900
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