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Ye X, Yang Y, Liao D, Tang K, Qiu H. Interfacial Effects of Nanostructured Doubly Reentrant Surfaces on the Evolution of Local Concentration and Fluid Flow in an Evaporating Droplet. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:9785-9796. [PMID: 38680055 DOI: 10.1021/acs.langmuir.4c00893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Surface modification, such as bioinspired nanostructured doubly reentrant surfaces that have presented superhydrophobic wettability even under low-surface-tension liquid, is a very promising technology for controlling droplet dynamics, heat transfer, and evaporation. In this article, we investigate the interfacial effects of nanostructured doubly reentrant surfaces on the flow behaviors and local concentration evolution during the evaporation of an ethanol/water multicomponent droplet. Using particle image velocimetry (PIV) and novel aggregate-induced emission-based (AIE) techniques, the flow patterns and local concentration distributions on both hydrophobic and nanostructured doubly reentrant surfaces were probed and compared. It is found that in addition to the established Marangoni flow-dominated stage, transition stage, and buoyancy-induced flow-dominated stage, a new transition stage and a rolling stage for the nanostructured doubly reentrant surface are detected in the late evaporation period. Differences in the local concentration distribution evolution occur depending on the hydrophobicity of the surface on which the droplet is placed. For the hydrophobic surface, a nonuniform local concentration distribution exists consistently, with a high water fraction in a shell-shaped region near the liquid-air interface and a secondary concentration gradient within this shell-shaped region. The concentration distribution on the nanostructured doubly reentrant surface evolves in a more complex manner, with a strip-shaped region of high water fraction forming in the intermediate stage and then reorganized by rolling flow in the late stage. Finally, theoretical analysis combining PIV and AIE visualization results reveals that the variations in droplet concentration distributions on surfaces with different hydrophobicities exert a significant impact on evaporative behaviors. These behaviors, in turn, affect the evolution of the local concentration distribution.
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Affiliation(s)
- Xin Ye
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Sustainable Energy and Environment Thrust, Function Hub, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou 511453, Guangdong, China
| | - Yinchuang Yang
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Dong Liao
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Kai Tang
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Smart Manufacturing Thrust, Systems Hub, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou 511453, Guangdong, China
| | - Huihe Qiu
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Sustainable Energy and Environment Thrust, Function Hub, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou 511453, Guangdong, China
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2
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Gibouin F, Nalatamby D, Lidon P, Medina-Gonzalez Y. Molecular Rotors for In Situ Viscosity Mapping during Evaporation of Confined Fluid Mixtures. ACS APPLIED MATERIALS & INTERFACES 2024; 16:8066-8076. [PMID: 38316660 DOI: 10.1021/acsami.3c16808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Numerous formulation processes of materials involve a drying step, during which evaporation of a solvent from a multicomponent liquid mixture, often confined in a thin film or in a droplet, leads to concentration and assembly of nonvolatile compounds. While the basic phenomena ruling evaporation dynamics are known, precise modeling of practical situations is hindered by the lack of tools for local and time-resolved mapping of concentration fields in such confined systems. In this article, the use of fluorescence lifetime imaging microscopy and of fluorescent molecular rotors is introduced as a versatile, in situ, and quantitative method to map viscosity and concentration fields in confined, evaporating liquids. More precisely, the cases of drying of a suspended liquid film and of a sessile droplet of mixtures of fructose and water are investigated. Measured viscosity and concentration fields allow characterization of drying dynamics, in agreement with simple modeling of the evaporation process.
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Affiliation(s)
- Florence Gibouin
- Laboratoire du Futur, (LOF)─Solvay─CNRS─Université de Bordeaux, UMR 5258, Bordeaux, Pessac 33600, France
| | - Dharshana Nalatamby
- Laboratoire du Futur, (LOF)─Solvay─CNRS─Université de Bordeaux, UMR 5258, Bordeaux, Pessac 33600, France
| | - Pierre Lidon
- Laboratoire du Futur, (LOF)─Solvay─CNRS─Université de Bordeaux, UMR 5258, Bordeaux, Pessac 33600, France
| | - Yaocihuatl Medina-Gonzalez
- Laboratoire du Futur, (LOF)─Solvay─CNRS─Université de Bordeaux, UMR 5258, Bordeaux, Pessac 33600, France
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Kind J, Stein M, Gambaryan-Roisman T, Stephan P, Zankel TL, Thiele CM. Construction of an active humidity regulation setup for NMR/MRI-Observation and simulation of the controlled evaporation of sessile water droplets. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2023; 348:107389. [PMID: 36731352 DOI: 10.1016/j.jmr.2023.107389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Controlling and improving processes like for example the production of organic semiconductors via printing depends on understanding the interplay of wetting and evaporation of complex fluids. Therefore, examination of the time dependent composition of complex fluid droplets during wetting or evaporation is of interest. The evaporation rate of sessile droplets containing largely water depends on the vapor pressures of the individual components and on the humidity (or partial pressure) of the surrounding gas phase. Hence, for a complete picture of an evaporation process and the comparability of the results of different measurements, it is essential to measure and control the humidity and temperature in the measurement compartment. Accordingly, climate chambers are available in different scales to fit a variety of techniques like contact angle goniometry to obtain results in a controlled atmosphere. We recently reported the application of MRI (Magnetic Resonance Imaging) and spatially resolved NMR (Nuclear Magnetic Resonance) spectroscopy for the examination of the evaporation of sessile droplets on surfaces in 10 mm NMR tubes. These are considered to be closed compartments. Here, we present an apparatus to a) measure and b) control the relative humidity within the sample compartment of the NMR setup by introducing preconditioned gas into the NMR tube. We monitored the evaporation of water droplets using RARE images and compared the volume decay with a) a simple diffusive evaporation model and b) with detailed FEM (finite element numerical model) simulations using COMSOL for validation. We find three evaporation regimes depending on the flow rate as well as on the distance of the gas outlet and the evaporating droplet. In one of the sample configurations tested the evaporation takes place in such a way that it can be described with the help of the simple diffusive model without convection. Thus, the presented approach opens comparative measurements with other methods as well as the observation of droplet evaporation in very dry or very humid environments with and without the influence of convection. Finally, using PRESS spectra, it is shown that the evaporation rate of water from a water/DMSO droplet can be controlled. This shows how the setup presented here can be used to study the evaporation of droplets of more complex mixtures.
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Affiliation(s)
- J Kind
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 16, D-64287 Darmstadt, Germany.
| | - M Stein
- Institut für Technische Thermodynamik, Technische Universität Darmstadt, Alarich-Weiss-Str. 10, D-64287 Darmstadt, Germany
| | - T Gambaryan-Roisman
- Institut für Technische Thermodynamik, Technische Universität Darmstadt, Alarich-Weiss-Str. 10, D-64287 Darmstadt, Germany
| | - P Stephan
- Institut für Technische Thermodynamik, Technische Universität Darmstadt, Alarich-Weiss-Str. 10, D-64287 Darmstadt, Germany
| | - T L Zankel
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 16, D-64287 Darmstadt, Germany
| | - C M Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 16, D-64287 Darmstadt, Germany
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Zhang H, Qin L, Cao D, Guan R, Cheng X, Zhou C. Bioinspired fluorescent molecules realize super bright blue luminescence under sunlight. J Colloid Interface Sci 2022; 632:161-170. [DOI: 10.1016/j.jcis.2022.10.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 10/12/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022]
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Liu S, Chen Y, Ruan Z, Lin J, Kong W. Development of label-free fluorescent biosensor for the detection of kanamycin based on aptamer capped metal-organic framework. ENVIRONMENTAL RESEARCH 2022; 206:112617. [PMID: 34968433 DOI: 10.1016/j.envres.2021.112617] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/22/2021] [Accepted: 12/21/2021] [Indexed: 06/14/2023]
Abstract
The abuse of antibiotics has caused serious threat to human health, so it is of great significance to develop a simple and sensitive method for the detection of trace residues of antibiotics in the environment and food. Herein, a novel label-free fluorescent biosensing platform based on the fluorescence change of aptamers-capped zeolitic imidazolate framework-8 (ZIF-8) @ 2,2',2″,2‴-((ethene-1,1,2,2-tetrayltetrakis (benzene-4,1-diyl)) tetrakis (oxy)) tetraacetic acid (TPE) through ATP-assisted competitive coordination reaction was designed for such an end. ZIF-8@TPE/Aptamer (Apt) emits strong fluorescence at 425 nm in HEPES buffer due to the aggregation induced luminescence properties of TPE molecules in confined state. Once kanamycin was added, the conformation of aptamer capped on the surface of ZIF-8@TPE changes because of the specific recognition of kanamycin with aptamer, leading to the collapse of ZIF-8 and release of TPE, accompanied with a dramatic decrease of fluorescence intensity. Under the optimal conditions, a good correlation was obtained between the fluorescence intensity of ZIF-8@TPE/Apt and the concentration of kanamycin ranging from 10 to 103 ng/mL with a detection limit of 7.3 ng/mL. The satisfactory analytical performance of the assay for kanamycin detection suggests good prospect for its application in food safety analysis.
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Affiliation(s)
- Shanshan Liu
- Hubei Key Laboratory of Processing and Application of Catalytic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang, 438000, China.
| | - Yanmei Chen
- Hubei Key Laboratory of Processing and Application of Catalytic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang, 438000, China
| | - Zhijun Ruan
- Hubei Key Laboratory of Processing and Application of Catalytic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang, 438000, China
| | - Junqi Lin
- Hubei Key Laboratory of Processing and Application of Catalytic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang, 438000, China.
| | - Wen Kong
- Hubei Key Laboratory of Processing and Application of Catalytic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang, 438000, China.
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Concentration gradients in evaporating binary droplets probed by spatially resolved Raman and NMR spectroscopy. Proc Natl Acad Sci U S A 2022; 119:e2111989119. [PMID: 35377781 PMCID: PMC9169657 DOI: 10.1073/pnas.2111989119] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Imagine you spill your drink and miss some spots when cleaning up. The next morning you notice that the stains look quite different on different surfaces. What has happened? In droplets of liquid mixtures, the components evaporate at different rates, which leads to gradients in concentration and surface tension. These gradients can cause, for example, so-called Marangoni flows, which in turn affect the evaporation process. To better understand evaporation-induced liquid flows, the concentration gradients have to be measured without disturbing the liquid. Marker molecules might be surface-active or even may affect the evaporation process. We report here on marker-free and contactless measurements of concentrations by spatially resolved Raman and NMR spectroscopy in evaporating binary droplets. Understanding the evaporation process of binary sessile droplets is essential for optimizing various technical processes, such as inkjet printing or heat transfer. Liquid mixtures whose evaporation and wetting properties may differ significantly from those of pure liquids are particularly interesting. Concentration gradients may occur in these binary droplets. The challenge is to measure concentration gradients without affecting the evaporation process. Here, spectroscopic methods with spatial resolution can discriminate between the components of a liquid mixture. We show that confocal Raman microscopy and spatially resolved NMR spectroscopy can be used as complementary methods to measure concentration gradients in evaporating 1-butanol/1-hexanol droplets on a hydrophobic surface. Deuterating one of the liquids allows analysis of the local composition through the comparison of the intensities of the C–H and C–D stretching bands in Raman spectra. Thus, a concentration gradient in the evaporating droplet was established. Spatially resolved NMR spectroscopy revealed the composition at different positions of a droplet evaporating in the NMR tube, an environment in which air exchange is less pronounced. While not being perfectly comparable, both methods—confocal Raman and spatially resolved NMR experiments—show the presence of a vertical concentration gradient as 1-butanol/1-hexanol droplets evaporate.
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Kresse B, Höfler MV, Privalov AF, Vogel M. Evaporation of Sessile Binary Mixture Droplets: Time Dependence of Droplet Shape and Concentration Profile from One-Dimensional Magnetic Resonance Microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13576-13583. [PMID: 34761948 DOI: 10.1021/acs.langmuir.1c01931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Many technological applications like inkjet printing, coating, or cooling processes rely on the evaporation of sessile droplets. Regarding liquid mixtures, the understanding of the underlying physics is still incomplete and process optimization requires trial and error. Our main goal is to establish a novel method in this field, one-dimensional magnetic resonance microscopy, to investigate the evaporation of sessile binary mixture droplets in the microliter range. It allows us not only to determine the droplet volume and shape, including contact angle, but also to measure concentration profiles with a spatial resolution of a few micrometers. These capabilities are demonstrated for a mixture of 1-octanol (OCT) and pentadecafluoro-1-octanol (F-OCT) by combining spatially resolved 1H and 19F nuclear magnetic resonance measurements. We clearly observe three evaporation regimes for the OCT/F-OCT mixture. The first and second regimes are characterized by the predominant evaporation of F-OCT and are separated by a depinning event. The third regime starts when no F-OCT is left and, thus, features the evaporation of a pure OCT droplet. During all stages, concentration gradients perpendicular to the substrate are weak in the studied binary droplet.
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Affiliation(s)
- Benjamin Kresse
- Institute for Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstr. 6, 64289 Darmstadt, Germany
| | - Mark V Höfler
- Institute of Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287 Darmstadt, Germany
| | - Alexei F Privalov
- Institute for Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstr. 6, 64289 Darmstadt, Germany
| | - Michael Vogel
- Institute for Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstr. 6, 64289 Darmstadt, Germany
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8
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Ma Y, Zhang H, Wang K, Cao D, Wang M, Guan R, Zhou C. The bright fluorescence of non-aromatic molecules in aqueous solution originates from pH-induced CTE behavior. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 254:119604. [PMID: 33676346 DOI: 10.1016/j.saa.2021.119604] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/22/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
Non-aromatic fluorescent materials with inherent visible light emission have received widespread attention. In this work, a biomimetic fluorescent molecule CA-AEP with a dipeptide structure is introduced. CA-AEP will emit bright biomimetic fluorescence in aqueous solutions by adjusting the pH, which has never been reported. This unique luminescent characteristic can be rationalized by the clustering-triggered emission (CTE) mechanism. In addition, CA-AEP can be used to monitor the maximum dynamic pH in the alkaline range of aqueous systems. Finally, the cytotoxicity assay to A549 cells showed that CA-AEP was non-toxic. Therefore, this work provides a new type of luminogen, which has potential application prospects in the field of environmental monitoring and cell biology.
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Affiliation(s)
- Yunqian Ma
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Hao Zhang
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Kexin Wang
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Duxia Cao
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Mingkai Wang
- School of Biological Science and Technology, University of Jinan, Jinan, Shandong 250022, China.
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China.
| | - Chuanjian Zhou
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
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9
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Guo BB, Liu C, Xin JH, Zhu CY, Xu ZK. Visualizing and monitoring interfacial polymerization by aggregation-induced emission. Polym Chem 2021. [DOI: 10.1039/d1py00594d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The aggregation-induced emission effect is used to visualize and monitor interfacial polymerization at the alkane–ionic liquid interface by virtue of the quantitative fluorescence of arylamine luminogens.
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Affiliation(s)
- Bian-Bian Guo
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Chang Liu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Jia-Hui Xin
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Cheng-Ye Zhu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Zhi-Kang Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
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Ranjbaran M, Datta AK. A Mechanistic Model for Bacterial Retention and Infiltration on a Leaf Surface during a Sessile Droplet Evaporation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12130-12142. [PMID: 33035063 DOI: 10.1021/acs.langmuir.0c01651] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Evaporation of sessile droplets on the surface of plant leaves is a process that frequently occurs during plant growth as well as postharvest processes. Evaporation-driven internal flows within sessile droplets can transport microorganisms near the leaf surface, facilitating their adhesion to surface microstructures such as trichomes, and infiltration into available openings such as stomata and grooves. A mechanistic model for this retention and infiltration pathway was developed. Solution domain is a sessile droplet located on a leaf surface, as well as its surrounding gas. The model includes fluid flow within the droplet and gas phases, gas-water interface tracking, heat transfer, transport of vapor in gas, and transport of sugar and bacteria within water. The model results are validated based on available literature data and experimental images. The results showed that a hydrophilic surface would promote bacterial retention and infiltration. Evaporation-driven flows increase concentration of bacteria around or inside microstructures at the leaf surface, facilitating their adhesion and infiltration. Larger microstructures having wider spacing between them increased the retention. A higher evaporation rate led to higher infiltration. Chemotaxis toward nutrients at the leaf surface and random motility were shown to decrease the retention and infiltration during evaporation.
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Affiliation(s)
- Mohsen Ranjbaran
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York 14853, United States
| | - Ashim K Datta
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York 14853, United States
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12
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Ding S, Che Y, Yu Y, Liu L, Jia D, Zhao J. Interactive Aggregation-Induced Emission Systems Controlled by Dynamic Covalent Chemistry. J Org Chem 2019; 84:6752-6756. [DOI: 10.1021/acs.joc.9b00495] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Li K, Lin Y, Lu C. Aggregation-Induced Emission for Visualization in Materials Science. Chem Asian J 2019; 14:715-729. [PMID: 30629327 DOI: 10.1002/asia.201801760] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/05/2019] [Indexed: 12/31/2022]
Abstract
Fluorescent imaging techniques have attracted much attention as a powerful tool to realize the visualization of structural and morphological evolution of various materials. However, the traditional fluorescent dyes usually suffered from aggregation-caused quenching, which severely limits the visualization results. In contrast, aggregation-induced emission (AIE) molecules with high quantum yields in the condensed state showed great opportunities for imaging techniques. In this feature article, recent progresses in visualization with AIE molecules are discussed. Assembly processes including crystallization, gelation process, and dissipative assembly have been observed. To better study information obtained regarding the processes, visualization during reactions, phase transitions, and molecular motions are successfully presented. Based on these successes, AIE molecules were further applied for phase recognition, macro-dispersion evaluation, and damage detection. Finally, we also present the outlook and perspectives, in our opinion, for the development of visualization by AIE molecules.
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Affiliation(s)
- Kaitao Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 79, 100029, Beijing, China
| | - Yanjun Lin
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 79, 100029, Beijing, China
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 79, 100029, Beijing, China
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Kita Y, Okauchi Y, Fukatani Y, Orejon D, Kohno M, Takata Y, Sefiane K. Quantifying vapor transfer into evaporating ethanol drops in a humid atmosphere. Phys Chem Chem Phys 2018; 20:19430-19440. [DOI: 10.1039/c8cp02521e] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A simultaneous evaporation and water intake empirical model for evaporation of organic solvent ethanol drops.
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Affiliation(s)
- Yutaku Kita
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- Department of Mechanical Engineering
| | - Yuya Okauchi
- Department of Mechanical Engineering
- Thermofluid Physics Laboratory
- Kyushu University
- Fukuoka 819-0395
- Japan
| | | | - Daniel Orejon
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- Department of Mechanical Engineering
| | - Masamichi Kohno
- Department of Mechanical Engineering
- Thermofluid Physics Laboratory
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Yasuyuki Takata
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 819-0395
- Japan
- Department of Mechanical Engineering
| | - Khellil Sefiane
- Institue of Multiscale Thermofluids
- School of Engineering
- The University of Edinburgh
- King's Buildings
- Edinburgh EH9 3JL
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