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Lee Y, Kim SH, Lee SJ, Bang J, Jung HW. Light-Scattering Analysis of Drying Behavior in Suspension Droplets with Silica and Polystyrene Particles and a Hydrosoluble Polymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17222-17231. [PMID: 37976431 DOI: 10.1021/acs.langmuir.3c02280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The coffee-ring structure, which is the final drying pattern of a sessile suspension droplet, is a key factor in controlling the uniformity of the particulate deposits in various coatings. Two light-scattering methods, diffusing wave spectroscopy (DWS) and multispeckle DWS (MSDWS), were used to quantitatively distinguish temporal changes in particle mobility in evaporating suspension droplets containing micrometer-sized silica and polystyrene (PS) particles. The characteristic particle mobility was measured in terms of the mean square displacement in the early stage of drying, and the local particle dynamics around the edge and center regimes of the droplets during drying were analyzed using MSDWS. Hydroxyethyl cellulose (HEC), a hydrosoluble polymer, was added to the silica and PS suspensions to further investigate its role in suppressing or enhancing coffee-ring patterns based on particle-polymer interactions. Consequently, dried microstructures can be directly correlated with real-time drying dynamics, as well as the interactions between solutes by comprehensive light-scattering methods.
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Affiliation(s)
- Yewon Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seong Hwan Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seong Jae Lee
- Department of Polymer Engineering, The University of Suwon, Hwaseong, Gyeonggi 18323, Republic of Korea
| | - Joona Bang
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
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2
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Si P, Zou J, Wu Y, Long Z, Sun M, Cholewinski A, Huang G, Zhao B, Zhang D. Rippling Colloidal Polyelectrolyte Complex for Customized Fingerprints with High Tactile Perception. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303304. [PMID: 37150841 DOI: 10.1002/smll.202303304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Indexed: 05/09/2023]
Abstract
Fingerprints possess wide applications in personal identification, tactile perception, access control, and anti-counterfeiting. However, latent fingerprints are usually left on touched surfaces, leading to the leakage of personal information. Furthermore, tactile perception greatly decreases when fingerprints are covered by gloves. Customized fingerprints are developed to solve these issues, but it is a challenge to develop fingerprints with various customized patterns using traditional techniques due to their requiring special templates, materials, or instruments. Inspired by ripples on the lake, blowing air is used to generate surface waves on a colloidal polyelectrolyte complex, leading to vertical stratification and the accumulation of particles near the top of the film layer. As water rapidly evaporates, the viscosity of these particles significantly increases and the wave is solidified, forming fingerprint patterns. These customized fingerprints integrate functions of grasping objects, personal identification without leaving latent fingerprints and tactile perception enhancement, which can be applied in information security, anti-counterfeiting, tactile sensors, and biological engineering.
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Affiliation(s)
- Pengxiang Si
- College of Textile Science and Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214222, China
| | - Jihua Zou
- Department of Rehabilitation Medicine, Zhujiang Hospital, School of Rehabilitation Science, Southern Medical University, 253 Gongye Middle Avenue, Guangzhou, 510280, China
| | - Yun Wu
- College of Textile Science and Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214222, China
| | - Zhu Long
- College of Textile Science and Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214222, China
| | - Manyou Sun
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Institute for Polymer Research, University of Waterloo, 200 University Avenue West, Waterloo, N2L 3G1, Canada
| | - Aleksander Cholewinski
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Institute for Polymer Research, University of Waterloo, 200 University Avenue West, Waterloo, N2L 3G1, Canada
| | - Guozhi Huang
- Department of Rehabilitation Medicine, Zhujiang Hospital, School of Rehabilitation Science, Southern Medical University, 253 Gongye Middle Avenue, Guangzhou, 510280, China
| | - Boxin Zhao
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Institute for Polymer Research, University of Waterloo, 200 University Avenue West, Waterloo, N2L 3G1, Canada
| | - Dan Zhang
- College of Textile Science and Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214222, China
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3
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Faidherbe A, Wilmet M, Teisseire J, Lequeux F, Talini L. Drying Liquid Coatings with an Evaporation Mask: Theory and Experiments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:3018-3028. [PMID: 36780365 DOI: 10.1021/acs.langmuir.2c02917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
We report a study of the spatially varying thickness of dried films of polymer solutions resulting from a nonuniform evaporation flux. The controlled heterogeneity of the evaporation flux is imposed by placing a solid mask above the evaporating film spread on a solid substrate. At the end of drying, a depression has formed under the mask, together with overthicknesses extending from the edge of the mask and over distances that may be larger than its size. By considering the flows induced in a vertically homogeneous film, we obtain analytical solutions for the thickness profiles during drying using a linear approximation in the limits of either gravity or capillarity-driven flows. We demonstrate that gravity can play a role in the deformations of the films, even if their initial thicknesses are 1 order of magnitude smaller than the capillary length. In addition, we examine two possible reference states for the linear approximation, i.e., far from the mask in the film of decreasing thickness and increasing viscosity, or under the mask where no evaporation occurs. We further compare these results with experimental ones obtained by drying thin films of polymer solutions under a mask. Both the extent and amplitude of the thickness heterogeneities of the dry film are quantitatively predicted by the linear analysis for a reference state under the mask. Our results therefore provide new insight on the patterns resulting from evaporation masks and can be generalized to minimize thickness heterogeneities in any situation in which the evaporation flux is nonuniform.
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Affiliation(s)
- Apolline Faidherbe
- CNRS, Surface du Verre et Interfaces, Saint-Gobain, 93300 Aubervilliers, France
| | | | | | - François Lequeux
- CNRS Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL Research University, Sorbonne Université 75005 Paris, France
| | - Laurence Talini
- CNRS, Surface du Verre et Interfaces, Saint-Gobain, 93300 Aubervilliers, France
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Pikina ES, Shishkin MA, Kolegov KS, Ostrovskii BI, Pikin SA. Circulating Marangoni flows within droplets in smectic films. Phys Rev E 2022; 106:055105. [PMID: 36559366 DOI: 10.1103/physreve.106.055105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 10/13/2022] [Indexed: 11/16/2022]
Abstract
We present a theoretical study and numerical simulation of Marangoni convection within ellipsoidal isotropic droplets embedded in free-standing smectic films (FSSFs). The thermocapillary flows are analyzed for both isotropic droplets spontaneously formed in FSSF overheated above the bulk smectic-isotropic transition and oil lenses deposited on the surface of the smectic film. The realistic model for which the upper drop interface is free from the smectic layers, while at the lower drop surface the smectic layering persists is considered in detail. For isotropic droplets and oil lenses this leads effectively to a sticking of fluid motion at the border with a smectic shell. The above mentioned asymmetric configuration is realized experimentally when the temperature of the upper side of the film is higher than at the lower one. The full set of stationary solutions for Stokes stream functions describing the Marangoni convection flows within the ellipsoidal drops are derived analytically. The temperature distribution in the ellipsoidal drop and the surrounding air is determined in the frame of the perturbation theory. As a result, the analytical solutions for the stationary thermocapillary convection are obtained for different droplet ellipticity ratios and the heat conductivity of the liquid crystal and air. In parallel, the numerical hydrodynamic calculations of the thermocapillary motion in drops are made. Both analytical and numerical simulations predict the axially symmetric circulatory convection motion determined by the Marangoni effect at the droplet-free surface. Due to a curvature of the drop interface a temperature gradient along its free surface always exists. Thus, the thermocapillary convection within the ellipsoidal droplets in overheated FSSF is possible for the arbitrarily small Marangoni numbers. Possible experimental observations enabling the checking of our predictions are proposed.
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Affiliation(s)
- E S Pikina
- Landau Institute for Theoretical Physics of the RAS, 142432, Chernogolovka, Moscow region, Russia.,Institute of Solid State Physics of the RAS, 142432 Chernogolovka, Moscow region, Russia.,Oil and Gas Research Institute of the RAS, 119333 Moscow, Russia
| | - M A Shishkin
- Institute of Solid State Physics of the RAS, 142432 Chernogolovka, Moscow region, Russia.,HSE University, 101000, Moscow, Russia
| | - K S Kolegov
- Institute of Solid State Physics of the RAS, 142432 Chernogolovka, Moscow region, Russia.,Astrakhan State University, 414056 Astrakhan, Russia
| | - B I Ostrovskii
- Institute of Solid State Physics of the RAS, 142432 Chernogolovka, Moscow region, Russia.,FSRC "Crystallography and Photonics" of the RAS, 119333 Moscow, Russia
| | - S A Pikin
- FSRC "Crystallography and Photonics" of the RAS, 119333 Moscow, Russia
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Savenko OA, Lebedev-Stepanov PV. Quasi-Stationary Evaporation of a Small Liquid Droplet on a Flat Substrate: Analytical Solution in Bipolar Coordinates. COLLOID JOURNAL 2022. [DOI: 10.1134/s1061933x22030115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhang C, Li W, Wang Y. Ultrafast Self-Assembly of Colloidal Photonic Crystals during Low-Pressure-Assisted Evaporation of Droplets. J Phys Chem Lett 2022; 13:3776-3780. [PMID: 35446036 DOI: 10.1021/acs.jpclett.2c00534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
After evaporation of a sessile colloidal droplet, the coffee stain always emerges with disordered structures. This may be unfavorable for many applications, such as droplet-based printing. Therefore, to realize uniform and ordered patterns is becoming an urgent task. In this work, we realize ultrafast fabrication of uniform colloidal crystals by suppressing the coffee ring effect in flash evaporation of a droplet. The low-pressure environment can tremendously improve the evaporation rate, which will accelerate the colloidal particles to be captured by the gas-liquid interface and self-assemble into ordered structures instantaneously. With the control of the pressure and concentration, the uniform and ordered patterns can be realized in several seconds. The colloidal photonic crystals with diverse structural colors can be easily and rapidly obtained by adjusting the particle sizes. We think this work may have instructive significance in the rapid fabrication of high-quality and high-performance printed electronics.
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Affiliation(s)
- Chen Zhang
- National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Weibin Li
- National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yuren Wang
- National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Zavarzin SV, Kolesnikov AL, Budkov YA, Barash LY. Influence of fluid flows on electric double layers in evaporating colloidal sessile droplets. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2022; 45:24. [PMID: 35288808 DOI: 10.1140/epje/s10189-022-00178-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
A model is developed for describing the transport of charged colloidal particles in an evaporating sessile droplet on the electrified metal substrate in the presence of a solvent flow. The model takes into account the electric charge of colloidal particles and small ions produced by electrolytic dissociation of the active groups on the colloidal particles and solvent molecules. We employ a system of self-consistent Poisson and Nernst-Planck equations for electric potential and average concentrations of colloidal particles and ions with the appropriate boundary conditions. The fluid dynamics, temperature distribution and evaporation process are described with the Navier-Stokes equations, equations of heat conduction and vapor diffusion in air, respectively. The developed model is used to carry out a first-principles numerical simulation of charged silica colloidal particle transport in an evaporating aqueous droplet. We find that electric double layers can be destroyed by a sufficiently strong fluid flow.
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Affiliation(s)
- Semen V Zavarzin
- School of Applied Mathematics, HSE University, Moscow, Russia, 101000
| | - Andrei L Kolesnikov
- Institut für Nichtklassische Chemie e.V., Permoserstr. 15, Leipzig, 04318, Germany
| | - Yury A Budkov
- School of Applied Mathematics, HSE University, Moscow, Russia, 101000
- Landau Institute for Theoretical Physics, Chernogolovka, Russia, 142432
| | - Lev Yu Barash
- Landau Institute for Theoretical Physics, Chernogolovka, Russia, 142432.
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Farzeena C, Varanakkottu SN. Patterning of Metallic Nanoparticles over Solid Surfaces from Sessile Droplets by Thermoplasmonically Controlled Liquid Flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:2003-2013. [PMID: 35119875 DOI: 10.1021/acs.langmuir.1c02739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Optically controlled assembly of suspended particles from evaporating sessile droplets is an emerging method to realize on-demand patterning of particles over solid substrates. Most of the reported strategies rely either on additives or surface texturing to modulate particle deposition. Though dynamic control over the assembly of microparticles is possible, limited success has been achieved in nanoparticle patterning, especially in the case of metallic nanoparticles. This work demonstrates a simple light-directed patterning of gold (Au) nanoparticles based on the thermoplasmonically controlled liquid flow. Excitation at the plasmonic wavelength (532 nm) generates the required temperature gradient, resulting in the particle assembly at the irradiation zone in response to the thermocapillary flow created inside the droplet. Particle streak velocimetry experiments and analysis confirm the existence of a strong thermocapillary flow, which counteracts the naturally occurring evaporative convection flows. By modulating the illumination conditions, we could achieve patterns with various morphologies, including center deposit, off-center deposit, multi-spot deposit, and lines. We successfully applied the developed strategy for realizing closely packed hybrid particle assembly containing different particles: Au and polystyrene particles (PS). We performed optical microscopy, 3D profilometry, and SEM analysis to characterize the particle deposit. We analyzed the periodicity of Au-PS hybrid assembly using fast Fourier transform and radial distribution function analysis. PS particles formed a hexagonal close-packed arrangement at the irradiation zone, with Au NPs residing inside the voids. We believe that the presented strategy could significantly enhance the applicability of the evaporative lithography from sessile droplets for the programmable patterning of metallic nanoparticles.
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Affiliation(s)
- Chalikkara Farzeena
- School of Materials Science and Engineering, National Institute of Technology Calicut, Kozhikode 673601 Kerala, India
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Cheng B, Zhao H, Yang J, Zhao J. Continuous evolution of the re-entrant phase separation in evaporating droplets of polymer solutions. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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10
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Al-Muzaiqer M, Ivanova N, Klyuev D. Fabrication of Ring-Shaped Deposits of Polystyrene Microparticles Driven by Thermocapillary Mechanism. MATERIALS 2021; 14:ma14185267. [PMID: 34576496 PMCID: PMC8464929 DOI: 10.3390/ma14185267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 09/06/2021] [Accepted: 09/10/2021] [Indexed: 11/21/2022]
Abstract
Fabrication of ring-shaped deposits of microparticles on solid surfaces with the desired length scales and morphology of particle arrangements is of great importance when developing modern optical and electronic resonators, chemical sensors, touch screens, field-emission displays, porous materials, and coatings with various functional properties. However, the controlled formation of ring-shaped patterns scaling from a few millimeters up to centimeters with simultaneous control of particle arrangement at the microscale is one of the most challenging problems in advanced materials science and technology. Here, we report a fabrication approach for ring-shaped structures of microparticles on a glass surface that relied on a local thermal impact produced by the subsurface heater and heat sink. Thermocapillary convection in the liquid covering microparticles in combination with evaporative lithography is responsible for the particle transport and the assembling into the ring-shaped patterns. An advantageous feature of this approach is based on the control of thermocapillary flow direction, achieved by changing the sign of the temperature gradient in the liquid, switching between heating and cooling modes. That allows for changing the particle transfer direction to create the ring-shaped deposits and dynamically tune their size and density distribution. We have studied the influence of the power applied to the heat source/sink and the duration of the applied thermal field on the rate of the ring fabrication, the sizes of the ring and the profile of the particle distribution in the ring. The proposed method is flexible to control simultaneously the centimeter scale and microscale processes of transfer and arrangements of particles and can be applied to the fabrication of ring structures of particles of different nature and shape.
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Affiliation(s)
- Mohammed Al-Muzaiqer
- Photonics and Microfluidics Laboratory, X-BIO Institute, University of Tyumen, 6 Volodarskogo, 625003 Tyumen, Russia; (M.A.-M.); (D.K.)
- Microfiltration Processes Laboratory, WCRC “Advanced Digital Technologies” University of Tyumen, 6 Volodarskogo, 625003 Tyumen, Russia
| | - Natalia Ivanova
- Photonics and Microfluidics Laboratory, X-BIO Institute, University of Tyumen, 6 Volodarskogo, 625003 Tyumen, Russia; (M.A.-M.); (D.K.)
- Microfiltration Processes Laboratory, WCRC “Advanced Digital Technologies” University of Tyumen, 6 Volodarskogo, 625003 Tyumen, Russia
- Correspondence:
| | - Denis Klyuev
- Photonics and Microfluidics Laboratory, X-BIO Institute, University of Tyumen, 6 Volodarskogo, 625003 Tyumen, Russia; (M.A.-M.); (D.K.)
- Microfiltration Processes Laboratory, WCRC “Advanced Digital Technologies” University of Tyumen, 6 Volodarskogo, 625003 Tyumen, Russia
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Kim J, Shim W, Jo SM, Wooh S. Evaporation driven synthesis of supraparticles on liquid repellent surfaces. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.12.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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