1
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Beigtan M, Haddadnezhad M, Weon BM. Altering Mechanical and Dissolution Properties of Coffee Deposit by Adding Glucose. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:15188-15195. [PMID: 39004894 DOI: 10.1021/acs.langmuir.4c01608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Glucose modifies the mechanical stability of coffee films and facilitates their dissolution dynamics at the microscale, rendering glucose-coffee a valuable natural biomaterial system for studying pharmaceutical applications. We show the glucose-dependent inhibition of crack propagation during the evaporation of glucose-coffee droplets. The addition of glucose increases the hardness, stiffness, and shear modulus of films, as measured by surface nanomechanical testing. The glucose-coffee film dissolves faster and more evenly than the pure coffee film through interfaces. The water penetrates through well-dissolved glucose channels. The modified mechanical properties and adjustable dissolution time, coupled with edibility, position the glucose-modified coffee as an excellent candidate for developing pharmaceutical inks for personalized medicine droplet-based printing.
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Affiliation(s)
- Mohadese Beigtan
- Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, South Korea
| | | | - Byung Mook Weon
- Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, South Korea
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2
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Milani M, Phou T, Prevot G, Ramos L, Cipelletti L. Space-resolved dynamic light scattering within a millimeter-sized drop: From Brownian diffusion to the swelling of hydrogel beads. Phys Rev E 2024; 109:064613. [PMID: 39021030 DOI: 10.1103/physreve.109.064613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 05/06/2024] [Indexed: 07/20/2024]
Abstract
We present a dynamic light scattering setup to probe, with time and space resolution, the microscopic dynamics of soft matter systems confined within millimeter-sized spherical drops. By using an ad hoc optical layout, we tackle the challenges raised by refraction effects due to the unconventional shape of the samples. We first validate the setup by investigating the dynamics of a suspension of Brownian particles. The dynamics measured at different positions in the drop, and hence different scattering angles, are found to be in excellent agreement with those obtained for the same sample in a conventional light scattering setup. We then demonstrate the setup capabilities by investigating a bead made of a polymer hydrogel undergoing swelling. The gel microscopic dynamics exhibit a space dependence that strongly varies with time elapsed since the beginning of swelling. Initially, the dynamics in the periphery of the bead are much faster than in the core, indicative of nonuniform swelling. As the swelling proceeds, the dynamics slow down and become more spatially homogeneous. By comparing the experimental results to numerical and analytical calculations for the dynamics of a homogeneous, purely elastic sphere undergoing swelling, we establish that the mean square displacement of the gel strands deviates from the affine motion inferred from the macroscopic deformation, evolving from fast diffusivelike dynamics at the onset of swelling to slower, yet supradiffusive, rearrangements at later stages.
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3
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McKibben N, Curtis M, Maryon O, Sawyer M, Lazouskaya M, Eixenberger J, Deng Z, Estrada D. Formulation and Aerosol Jet Printing of Nickel Nanoparticle Ink for High-Temperature Microelectronic Applications and Patterned Graphene Growth. ACS APPLIED ELECTRONIC MATERIALS 2024; 6:748-760. [PMID: 38435803 PMCID: PMC10902849 DOI: 10.1021/acsaelm.3c01175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 03/05/2024]
Abstract
Aerosol jet printing (AJP) is an advanced manufacturing technique for directly writing nanoparticle inks onto target substrates. It is an emerging reliable, efficient, and environmentally friendly fabrication route for thin film electronics and advanced semiconductor packaging. This fabrication technique is highly regarded for its rapid prototyping, the flexibility of design, and fine feature resolution. Nickel is an attractive high-temperature packaging material due to its electrical conductivity, magnetism, and corrosion resistance. In this work, we synthesized nickel nanoparticles and formulated an AJP ink, which was printed on various material surfaces. Thermal sintering experiments were performed on the samples to explore the redox behavior and to optimize the electrical performance of the devices. The nickel devices were heated to failure under an argon atmosphere, which was marked by a loss of reflectance and electrical properties due to the dewetting of the films. Additionally, a reduction mechanism was observed from these studies, which resembled that of nucleation and coalescence. Finally, multilayer graphene was grown on a custom-printed nickel thin film using chemical vapor deposition (CVD), establishing a fully additive manufacturing route to patterned graphene.
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Affiliation(s)
- Nicholas McKibben
- Micron
School of Materials Science and Engineering, Boise State University, 1910 W University Drive, Boise, Idaho 83725, United States
| | - Michael Curtis
- Micron
School of Materials Science and Engineering, Boise State University, 1910 W University Drive, Boise, Idaho 83725, United States
| | - Olivia Maryon
- Micron
School of Materials Science and Engineering, Boise State University, 1910 W University Drive, Boise, Idaho 83725, United States
| | - Mone’t Sawyer
- Micron
School of Materials Science and Engineering, Boise State University, 1910 W University Drive, Boise, Idaho 83725, United States
| | - Maryna Lazouskaya
- Micron
School of Materials Science and Engineering, Boise State University, 1910 W University Drive, Boise, Idaho 83725, United States
- Tallinn
University of Technology. Ehitajate tee 5, Tallinn 19086, Estonia
| | - Josh Eixenberger
- Department
of Physics, Boise State University, 1910 W University Drive, Boise, Idaho 83725, United States
- Center
for Advanced Energy Studies, Boise State
University, Boise, Idaho 83725, United States
| | - Zhangxian Deng
- Department
of Mechanical and Biomedical Engineering, Boise State University, Boise, Idaho 83725, United States
| | - David Estrada
- Micron
School of Materials Science and Engineering, Boise State University, 1910 W University Drive, Boise, Idaho 83725, United States
- Center
for Advanced Energy Studies, Boise State
University, Boise, Idaho 83725, United States
- Idaho National
Laboratory, Idaho Falls, Idaho 83401, United States
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4
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Yang S, Sha D, Li Y, Wang M, Zhu X, Wang X, Chen G, Li Y, Xing T. Preparation of Natural Plant Polyphenol Catechin Film for Structural Coloration of Silk Fabrics. Biomimetics (Basel) 2024; 9:15. [PMID: 38248589 PMCID: PMC10813428 DOI: 10.3390/biomimetics9010015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/24/2023] [Accepted: 12/04/2023] [Indexed: 01/23/2024] Open
Abstract
Traditional textile dyeing uses chemical pigments and dyes, which consumes a large amount of water and causes serious environmental pollution. Structural color is an essential means of achieving green dyeing of textiles, and thin-film interference is one of the principles of structural coloring. In the assembly of structural color films, it is necessary to introduce dark materials to suppress light scattering and improve the brightness of the fabric. In this study, the conditions for the generation of nanofilms of catechin (CC) at the gas-liquid interface were successfully investigated. At the same time, environmentally friendly colored silk fabrics were novelly prepared using polycatechin (PCC) structural color films. In addition, it was found that various structural colors were obtained on the surface of silk fabrics by adjusting the time. Meanwhile, the color fastness of the structural colored fabrics was improved by introducing polyvinylpyrrolidone (PVP) to form a strong hydrogen bond between the fabric and catechin. PCC film is uniform and smooth, with a special double-layer structure, and can be attached to the surface of silk fabrics, giving the fabrics special structural colors. Through the thin-film interference formed between the visible light and the PCC film, the silk fabrics obtain bright, controllable, and uniform structural colors. This method is easy to operate and provides a new way of thinking for environmental-protection-oriented coloring of fabrics.
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Affiliation(s)
| | | | | | | | | | | | | | - Yichen Li
- College of Textile and Clothing Engineering, China National Textile and Apparel Council Key Laboratory of Natural Dyes, Soochow University, Suzhou 215123, China; (S.Y.); (D.S.); (Y.L.); (M.W.); (X.Z.); (X.W.); (G.C.)
| | - Tieling Xing
- College of Textile and Clothing Engineering, China National Textile and Apparel Council Key Laboratory of Natural Dyes, Soochow University, Suzhou 215123, China; (S.Y.); (D.S.); (Y.L.); (M.W.); (X.Z.); (X.W.); (G.C.)
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5
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Tawakal MS, Abdelghany Metwally AM, El-Wassefy NA, Tawfik MA, Shamaa MS. Static friction, surface roughness, and antibacterial activity of orthodontic brackets coated with silver and silver chitosan nanoparticles. J World Fed Orthod 2023; 12:260-268. [PMID: 37709635 DOI: 10.1016/j.ejwf.2023.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/27/2023] [Accepted: 08/15/2023] [Indexed: 09/16/2023]
Abstract
BACKGROUND To determine the effect of silver and silver chitosan nanocoatings on monocrystalline ceramic, polycrystalline ceramic, and metallic brackets regarding friction, roughness, and antibacterial effect against Streptococcus mutans. METHODS A total of 99 upper right premolar brackets with a 0.022 × 0.025 -inch slot were divided into three groups, each 33 according to coating material; the non-coated group, silver nanoparticles (AgNPs), and silver chitosan nanoparticles (Ag-CsNPs) groups. Each group was equally subdivided into the following three subgroups regarding bracket materials: monocrystalline ceramic, polycrystalline ceramic, and metallic brackets. A universal testing machine determined static friction on a custom-made acrylic jig. Then a profilometer machine was used to collect roughness data, and finally, the anti-cariogenic effect was measured with the disc diffusion technique's "minimum zone of inhibition" against Streptococcus mutans. Two-way ANOVA was used to compare data between groups and subgroups, followed by the Bonferroni test for multiple pair-wise comparisons. RESULTS The nanocoating effect on ceramic brackets' static friction was non-significant. The AgNPs and Ag-CsNPs coated metallic group revealed a significant increase in static friction-a significant effect of the nanocoating in the surface roughness of monocrystalline and polycrystalline ceramic brackets. A significant favorable effect of AgNPs and Ag-CsNPs against Streptococcus mutans was observed. CONCLUSIONS AgNPs and Ag-CsNPs coats are unsuitable for decreasing friction in metallic brackets or improving roughness in polycrystalline ceramic brackets. Nano coating can improve roughness in monocrystalline ceramic brackets. Coating brackets with AgNPs and Ag-CsNPs has a tremendous antibacterial effect on Streptococcus mutans, a substantial factor in the incidence of dental caries.
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Affiliation(s)
- Magda Shaban Tawakal
- Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
| | | | - Noha A El-Wassefy
- Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Marwa Ali Tawfik
- Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Marwa Sameh Shamaa
- Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
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6
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Urase M, Maejima Y, Watanabe T, Kishikawa K, Fudouzi H, Kohri M. Crack-Free Structural Color Materials Prepared without Disrupting the Particle Arrangement by Controlling the Internal Stress Relaxation and Interactions of the Melanin Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37300496 DOI: 10.1021/acs.langmuir.3c00720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In fabricating structural color materials with assembled colloidal particles, there is a trade-off between the internal stresses acting on the particles and the interactions between the particles during solvent volatilization. It is crucial to fabricate crack-free materials that maintain the periodic arrangements of the particles by understanding the mechanism for crack initiation. Here, we focused on the composition and additives of melanin particle dispersions to obtain crack-free structural color materials without disturbing the particle arrangements. The use of a water/ethanol mixture as a dispersant effectively reduced the internal stresses of the particles during solvent evaporation. Furthermore, the addition of low-molecular-weight, low-volatility ionic liquids ensured that the arrangement and interactions of the particles were maintained after solvent volatilization. Optimization of the composition and additives of the dispersion made it possible to achieve crack-free melanin-based structural color materials while maintaining vivid, angular-dependent color tones.
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Affiliation(s)
- Mai Urase
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Yui Maejima
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Taku Watanabe
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Keiki Kishikawa
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Hiroshi Fudouzi
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba-Shi, Ibaraki 305-0047, Japan
| | - Michinari Kohri
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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7
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Howard NS, Archer AJ, Sibley DN, Southee DJ, Wijayantha KGU. Surfactant Control of Coffee Ring Formation in Carbon Nanotube Suspensions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:929-941. [PMID: 36607610 PMCID: PMC9878724 DOI: 10.1021/acs.langmuir.2c01691] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 12/06/2022] [Indexed: 06/17/2023]
Abstract
The coffee ring effect regularly occurs during the evaporation of colloidal droplets and is often undesirable. Here we show that adding a specific concentration of a surfactant can mitigate this effect. We have conducted experiments on aqueous suspensions of carbon nanotubes that were prepared with cationic surfactant dodecyltrimethylammonium bromide added at 0.2, 0.5, 1, 2, 5, and 10 times the critical micelle concentration. Colloidal droplets were deposited on candidate substrates for printed electronics with varying wetting characteristics: glass, polyethylene terephthalate, fluoroethylene propylene copolymer, and polydimethylsiloxane. Following drying, four pattern types were observed in the final deposits: dot-like, uniform, coffee ring deposits, and combined patterns (coffee ring with a dot-like central deposit). Evaporation occurred predominantly in constant contact radius mode for most pattern types, except for some cases that led to uniform deposits in which early stage receding of the contact line occurred. Image analysis and profilometry yielded deposit thicknesses, allowing us to identify a coffee ring subfeature in all uniform deposits and to infer the percentage coverage in all cases. Importantly, a critical surfactant concentration was identified for the generation of highly uniform deposits across all substrates. This concentration resulted in visually uniform deposits consisting of a coffee ring subfeature with a densely packed center, generated from two distinct evaporative phases.
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Affiliation(s)
- N. S. Howard
- Department
of Chemistry, Loughborough University, Loughborough LE11 3TU, U.K.
| | - A. J. Archer
- Department
of Mathematical Sciences, Loughborough University, Loughborough LE11 3TU, U.K.
- Interdisciplinary
Centre for Mathematical Modelling, Loughborough
University, Loughborough LE11 3TU, U.K.
| | - D. N. Sibley
- Department
of Mathematical Sciences, Loughborough University, Loughborough LE11 3TU, U.K.
- Interdisciplinary
Centre for Mathematical Modelling, Loughborough
University, Loughborough LE11 3TU, U.K.
| | - D. J. Southee
- School
of Design and Creative Arts, Loughborough
University, Loughborough LE11 3TU, U.K.
| | - K. G. U. Wijayantha
- Department
of Chemistry, Loughborough University, Loughborough LE11 3TU, U.K.
- Centre
for Renewable and Low Carbon Energy, Cranfield
University, Cranfield, Bedfordshire MK43 0AL, U.K.
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8
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Formation and development of distinct deposit patterns by drying Polyelectrolyte-stabilized colloidal droplets at different surfactant concentrations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Badar A, Tirumkudulu MS. Moving cracks in drying colloidal films. SOFT MATTER 2022; 18:2252-2275. [PMID: 35244102 DOI: 10.1039/d1sm01568k] [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
Drying colloidal films are encountered in many applications ranging from paints and coatings to ceramic and semiconductor processing. In many cases, shrinkage stresses are generated during drying, which can fracture the film. While much of the previous experimental and theoretical work has focused on cracking in static cracks, there are very few studies on the dynamics of cracks in colloidal coatings. Here, we derive an analytical solution for the stress, displacement, and pressure fields near the crack tip for a steadily moving crack. We consider first the two extreme cases, namely, the undrained limit where the crack motion is much faster than the Darcy flow rate and the opposite extreme of very slow crack propagation, the drained limit. Next, we consider the general case where the timescale for crack-tip motion is comparable to that for the interstitial flow. The results incorporate the micro-structural details of the system including the particle volume fraction and nature of packing, and the mechanical properties of the particles such as shear modulus and Poisson's ratio. While the predicted results are in line with those for brittle materials, the predicted crack speeds are at least an order of magnitude higher than those observed in experiments. We conclude with the possible reasons for the discrepancy.
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Affiliation(s)
- Atiya Badar
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
| | - Mahesh S Tirumkudulu
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
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10
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Yang H, Zhou J, Duan Z, Lu B, Deng B, Xu W. Preparation of Structural Color on Cotton Fabric with High Color Fastness through Multiple Hydrogen Bonds between Polyphenol Hydroxyl and Lactam. ACS APPLIED MATERIALS & INTERFACES 2022; 14:3244-3254. [PMID: 34984902 DOI: 10.1021/acsami.1c18532] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Structural coloration is an important way to realize eco-friendly dyeing of textiles. Structural colored cotton fabric was obtained by fabricating a polydopamine (PDA) film on the white cotton fabric at different polymerization reaction times. PDA is prone to generate capillary tension during film formation, which damages the uniformity and interfacial bonding force of the film. Multiple hydrogen bonds will form between the lactam group of polyvinylpyrrolidone (PVP) and the phenolic hydroxyl group of PDA. The introduced hydrogen bonds will effectively enhance the interfacial bond strength and lead to structural color with high color fastness. The surface morphology of double-layer aggregates of the PDA film on structural colored cotton fabric was revealed by scanning electron microscopy. The chemical constitution of the PDA film and PVP was investigated by Fourier transform infrared spectroscopy and X-ray diffraction. The color characteristics of structural colored cotton fabrics were analyzed by UV-vis reflectance spectroscopy and spectrophotometry.
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Affiliation(s)
- Huiyu Yang
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
- College of Material Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China
| | - Jingyi Zhou
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Zijiang Duan
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Bin Lu
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Bo Deng
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Weilin Xu
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
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11
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12
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Cai Z, Li Z, Ravaine S, He M, Song Y, Yin Y, Zheng H, Teng J, Zhang A. From colloidal particles to photonic crystals: advances in self-assembly and their emerging applications. Chem Soc Rev 2021; 50:5898-5951. [PMID: 34027954 DOI: 10.1039/d0cs00706d] [Citation(s) in RCA: 151] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Over the last three decades, photonic crystals (PhCs) have attracted intense interests thanks to their broad potential applications in optics and photonics. Generally, these structures can be fabricated via either "top-down" lithographic or "bottom-up" self-assembly approaches. The self-assembly approaches have attracted particular attention due to their low cost, simple fabrication processes, relative convenience of scaling up, and the ease of creating complex structures with nanometer precision. The self-assembled colloidal crystals (CCs), which are good candidates for PhCs, have offered unprecedented opportunities for photonics, optics, optoelectronics, sensing, energy harvesting, environmental remediation, pigments, and many other applications. The creation of high-quality CCs and their mass fabrication over large areas are the critical limiting factors for real-world applications. This paper reviews the state-of-the-art techniques in the self-assembly of colloidal particles for the fabrication of large-area high-quality CCs and CCs with unique symmetries. The first part of this review summarizes the types of defects commonly encountered in the fabrication process and their effects on the optical properties of the resultant CCs. Next, the mechanisms of the formation of cracks/defects are discussed, and a range of versatile fabrication methods to create large-area crack/defect-free two-dimensional and three-dimensional CCs are described. Meanwhile, we also shed light on both the advantages and limitations of these advanced approaches developed to fabricate high-quality CCs. The self-assembly routes and achievements in the fabrication of CCs with the ability to open a complete photonic bandgap, such as cubic diamond and pyrochlore structure CCs, are discussed as well. Then emerging applications of large-area high-quality CCs and unique photonic structures enabled by the advanced self-assembly methods are illustrated. At the end of this review, we outlook the future approaches in the fabrication of perfect CCs and highlight their novel real-world applications.
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Affiliation(s)
- Zhongyu Cai
- Research Institute for Frontier Science, Beijing Advanced Innovation Center for Biomedical Engineering, School of Space and Environment, Beihang University, Beijing 100191, China. and Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117576, Singapore and Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Zhiwei Li
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - Serge Ravaine
- CNRS, Univ. Bordeaux, CRPP, UMR 5031, F-33600 Pessac, France
| | - Mingxin He
- Department of Physics, Center for Soft Matter Research, New York University, New York, NY 10003, USA
| | - Yanlin Song
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yadong Yin
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - Hanbin Zheng
- CNRS, Univ. Bordeaux, CRPP, UMR 5031, F-33600 Pessac, France
| | - Jinghua Teng
- Institute of Materials Research and Engineering, Agency for Science, Technology, and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore.
| | - Ao Zhang
- Research Institute for Frontier Science, Beijing Advanced Innovation Center for Biomedical Engineering, School of Space and Environment, Beihang University, Beijing 100191, China.
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13
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Zhu Z, Zhang J, Ning H, Yang Y, Xu W, Yao R, Cao X, Tang B, Lu X, Peng J. Binary Solvent Systems for Piezoelectric Printing Crack-Free PAM/ZrO x Hybrid Thin Films through Nanostructure Modulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5979-5985. [PMID: 33961745 DOI: 10.1021/acs.langmuir.1c00500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Polymer/oxide hybrid thin films, which have excellent electrical and mechanical performance, can be effectively fabricated through the sol-gel process, showing great potential in the future printed electronics. However, gelation of polymer/oxide ink systems can easily occur during a thermal process in which case capillary stress can lead to the crack of printed films due to the long period of stress accumulation. To solve this problem, the effect of different solvent systems on formed PAM/ZrOx hybrid films, which were printed by piezoelectric printing, was studied in this paper, including single solvent systems of glycol and binary solvent systems of glycol and water. The result showed that the microstructure characteristics and mechanical properties of hybrid nanostructures formed in different solvent systems varied significantly, and crack behavior can be regulated by simply adjusting the water volume ratio of the solvent system. The crack formation was significantly inhibited when the water volume ratio reached 25%.
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Affiliation(s)
- Zhennan Zhu
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Jianhua Zhang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai 200072, China
| | - Honglong Ning
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Yuexin Yang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Wei Xu
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Rihui Yao
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Xiuhua Cao
- State Key Laboratory of Advanced Materials and Electronic Components, Fenghua Electronic Industrial Park, No. 18 Fenghua Road, Zhaoqing 526020, China
| | - Biao Tang
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
| | - Xubing Lu
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - Junbiao Peng
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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14
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Pujar R, Kumar A, Rao KDM, Sadhukhan S, Dutta T, Tarafdar S, Kulkarni GU. Narrowing Desiccating Crack Patterns by an Azeotropic Solvent for the Fabrication of Nanomesh Electrodes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16130-16135. [PMID: 31710498 DOI: 10.1021/acs.langmuir.9b02442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Desiccation of a colloidal layer produces crack patterns because of stress arising out of solvent evaporation. Associated with it is the rearrangement of particles, while adhesion to the substrate resists such movements. The nature of solvent, which is often overlooked, plays a key role in the process as it dictates evaporation and wetting properties of the colloidal film. Herein, we study the crack formation process by using a mixture of solvents, water, and isopropyl alcohol (IPA). Among the various ratios, a water/IPA mixture (15:85 by volume) close to the azeotropic composition possesses unusual evaporation and wetting properties, leading to narrower cracks with widths down to ∼162 nm, uncommon among the known crackle patterns. The dense and narrow crack patterns have been used as sacrificial templates to obtain metal meshes on transparent substrates for optoelectronic applications.
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Affiliation(s)
- Rajashekhar Pujar
- Centre for Nano and Soft Matter Sciences , Jalahalli , Bengaluru 560013 , India
- Manipal Academy of Higher Education , Manipal 576104 , India
| | - Ankush Kumar
- Centre for Nano and Soft Matter Sciences , Jalahalli , Bengaluru 560013 , India
- Chemistry and Physics of Materials Unit , Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur , Bengaluru 560064 , India
| | - K D M Rao
- Technical Research Center , Indian Association for the Cultivation of Science , Kolkata 700032 , India
| | - Supti Sadhukhan
- Physics Department , Jogesh Chandra Chaudhuri College , Kolkata 700033 , India
| | - Tapati Dutta
- Physics Department , St. Xavier's College , Kolkata 700016 , India
| | - Sujata Tarafdar
- Physics Department , Jadavpur University , Kolkata 700032 , India
| | - Giridhar U Kulkarni
- Centre for Nano and Soft Matter Sciences , Jalahalli , Bengaluru 560013 , India
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15
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Li W, Ji W, Lan D, Wang Y. Self-Assembly of Ordered Microparticle Monolayers from Drying a Droplet on a Liquid Substrate. J Phys Chem Lett 2019; 10:6184-6188. [PMID: 31577443 DOI: 10.1021/acs.jpclett.9b01917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Drying droplets on solid substrates has always formed a nonuniform and disordered "coffee ring" stain, which has a great negative effect on the application of inject printing and colloidal assembly. We obtain a macrouniform and micro-ordered pattern through evaporation of a colloidal droplet resting on a liquid substrate. The evaporative convection and the capillary forces were responsible for the formation of the ordered structures, which assembled into a monolayer pattern at the liquid-air interface under the action of the weak capillary flow and shrinkage of the triple line. The central bump deposits with disordered particle stacking on the liquid-liquid interface could be attributed to the fast meeting of the descending particles (gravitational sedimentation) and ascending liquid-liquid interface; they would scatter on the ordered monolayer structure and form the final uniform pattern.
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Affiliation(s)
- Weibin Li
- National Microgravity Laboratory , Institute of Mechanics, Chinese Academy of Sciences , 100190 Beijing , China
- School of Engineering Science , University of Chinese Academy of Sciences , 100049 Beijing , China
| | - Wenjie Ji
- National Microgravity Laboratory , Institute of Mechanics, Chinese Academy of Sciences , 100190 Beijing , China
- School of Engineering Science , University of Chinese Academy of Sciences , 100049 Beijing , China
| | - Ding Lan
- National Microgravity Laboratory , Institute of Mechanics, Chinese Academy of Sciences , 100190 Beijing , China
- School of Engineering Science , University of Chinese Academy of Sciences , 100049 Beijing , China
| | - Yuren Wang
- National Microgravity Laboratory , Institute of Mechanics, Chinese Academy of Sciences , 100190 Beijing , China
- School of Engineering Science , University of Chinese Academy of Sciences , 100049 Beijing , China
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16
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Park HK, Kim Y, Min H, Pang C, Weon BM. Hexagonal deposits of colloidal particles. Phys Rev E 2019; 100:022602. [PMID: 31574711 DOI: 10.1103/physreve.100.022602] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Indexed: 11/07/2022]
Abstract
Colloidal particles are essential materials for modern inkjet printing and coating. Here we demonstrate a versatile method to achieve hexagonal deposits of colloidal particles through droplet evaporation on hexagonal micropillar arrays. We identify how colloidal fluids turn into hexagonal deposits during evaporation with x-ray tomography. Interestingly, evaporation-driven hexagonal deposits are quite crack-free uniform. We attribute hexagonal deposit shape control to local contact line pinning by colloidal particles and geometric constraints by micropillar arrays. This deposition strategy offers a feasibility for high-quality evaporation-driven crack-free uniform polygonal deposits of colloidal particles for diverse applications.
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Affiliation(s)
- Hee Kyeong Park
- Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, South Korea.,Research Center for Advanced Materials Technology, Sungkyunkwan University, Suwon 16419, South Korea
| | - Yeseul Kim
- Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, South Korea.,Research Center for Advanced Materials Technology, Sungkyunkwan University, Suwon 16419, South Korea
| | - Hyeongho Min
- Department of Chemical Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, South Korea
| | - Changhyun Pang
- Department of Chemical Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, South Korea
| | - Byung Mook Weon
- Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, South Korea.,Research Center for Advanced Materials Technology, Sungkyunkwan University, Suwon 16419, South Korea
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17
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Chen R, Zhang L, Shen W. Controlling the contact angle of biological sessile drops for study of their desiccated cracking patterns. J Mater Chem B 2018; 6:5867-5875. [PMID: 32254708 DOI: 10.1039/c8tb01979g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Current exploration of cracking patterns of desiccated biological sessile drops as a new approach of scientific research is progressing rapidly. It has been proposed that biological fluids are naturally capable of storing information. Cracking patterns of desiccated biological sessile drops have the potential to provide a facile means to study the links between compositions of biofluids, their structures and their functions. This potential is, however, limited by our current inability to control the influences of non-pathological factors on cracking patterns. Among the non-pathological factors, the initial sessile drop contact angle has a strong influence on cracking patterns through affecting the material transport and stress distributions within the drop. In this work, we developed a method to control the initial drop contact angle on a glass surface to enable the investigation of the contact angle-induced pattern changes in a biological sessile drop. Human blood was selected as the biofluid in this study, because of its richness in cracking patterns. It has been found that the increase in the initial contact angle enlarges the orthoradial cracks close to the drop edge and compresses the width of the peripheral region. We have also concluded that the number of cracks in the central region of the desiccated pattern can be correlated with the drop contact angle. This work also provides a novel protocol for fabricating standardized substrates for studies of desiccation patterns of biological and other complex colloidal fluids.
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Affiliation(s)
- Ruoyang Chen
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia.
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18
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Hristova M, Lesov I, Tcholakova S, Goletto V, Denkov N. From Pickering foams to porous carbonate materials: crack-free structuring in drying ceramics. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Wang X, Fu T, Wang Z. Fabrication of metal nanopatterns for organic field effect transistor electrodes by cracking and transfer printing. NANOTECHNOLOGY 2018; 29:145301. [PMID: 29384135 DOI: 10.1088/1361-6528/aaabdd] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this paper, we demonstrate a novel method for fabricating metal nanopatterns using cracking to address the limitations of traditional techniques. Parallel crack arrays were created in a polydimethylsiloxane (PDMS) mold using a combination of surface modification and control of strain fields. The elastic PDMS containing the crack arrays was subsequently used as a stamp to prepare nanoscale metal patterns on a substrate by transfer printing. To illustrate the functionality of this technique, we employed the metal patterns as the source and drain contacts of an organic field effect transistor. Using this approach, we fabricated transistors with channel lengths ranging from 70-600 nm. The performance of these devices when the channel length was reduced was studied. The drive current density increases as expected, indicating the creation of operational transistors with recognizable properties.
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Affiliation(s)
- Xiaonan Wang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, People's Republic of China
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20
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Evolution of Structural, Morphological, Mechanical and Optical properties of TiAlN coatings by Variation of N and Al amount. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-017-0603-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Banchelli M, de Angelis M, D'Andrea C, Pini R, Matteini P. Triggering molecular assembly at the mesoscale for advanced Raman detection of proteins in liquid. Sci Rep 2018; 8:1033. [PMID: 29348509 PMCID: PMC5773671 DOI: 10.1038/s41598-018-19558-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 12/21/2017] [Indexed: 01/14/2023] Open
Abstract
An advanced optofluidic system for protein detection based on Raman signal amplification via dewetting and molecular gathering within temporary mesoscale assemblies is presented. The evaporation of a microliter volume of protein solution deposited in a circular microwell precisely follows an outward-receding geometry. Herein the combination of liquid withdrawal with intermolecular interactions induces the formation of self-assembled molecular domains at the solid-liquid interface. Through proper control of the evaporation rate, amplitude of the assemblies and time for spectral collection at the liquid edge are extensively raised, resulting in a local enhancement and refinement of the Raman response, respectively. Further signal amplification is obtained by taking advantage of the intense local electromagnetic fields generated upon adding a plasmonic coating to the microwell. Major advantages of this optofluidic method lie in the obtainment of high-quality, high-sensitivity Raman spectra with detection limit down to sub-micromolar values. Peculiarly, the assembled proteins in the liquid edge region maintain their native-like state without displaying spectral changes usually occurring when dried drop deposits are considered.
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Affiliation(s)
- Martina Banchelli
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - Marella de Angelis
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - Cristiano D'Andrea
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - Roberto Pini
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy
| | - Paolo Matteini
- Institute of Applied Physics 'Nello Carrara', National Research Council (IFAC-CNR), via Madonna del Piano 10, Sesto Fiorentino, Italy.
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22
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Gervais E, Aceta Y, Gros P, Evrard D. Study of an AuNPs functionalized electrode using different diazonium salts for the ultra-fast detection of Hg(II) traces in water. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.12.136] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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23
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Huang X, Ivanova N, Strzelec A, Zacharia NS. Assembly of large area crack free clay porous films. RSC Adv 2018; 8:1001-1004. [PMID: 35538966 PMCID: PMC9076984 DOI: 10.1039/c7ra11969k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 12/05/2017] [Indexed: 11/21/2022] Open
Abstract
A method for making inverse opal-like porous clay films that are crack-free over a large area (on the scale of square centimeters).
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Affiliation(s)
- Xiayun Huang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai
- China
| | - Nina Ivanova
- Department of Mechanical Engineering
- Texas A&M University
- College Station
- USA
- Department of Chemical and Materials Engineering
| | - Andrea Strzelec
- Department of Mechanical Engineering
- Texas A&M University
- College Station
- USA
- Texas A&M Transportation Institute
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24
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Lanotte L, Laux D, Charlot B, Abkarian M. Role of red cells and plasma composition on blood sessile droplet evaporation. Phys Rev E 2017; 96:053114. [PMID: 29347652 DOI: 10.1103/physreve.96.053114] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Indexed: 11/07/2022]
Abstract
The morphology of dried blood droplets derives from the deposition of red cells, the main components of their solute phase. Up to now, evaporation-induced convective flows were supposed to be at the base of red cell distribution in blood samples. Here, we present a direct visualization by videomicroscopy of the internal dynamics in desiccating blood droplets, focusing on the role of cell concentration and plasma composition. We show that in diluted suspensions, the convection is promoted by the rich molecular composition of plasma, whereas it is replaced by an outward red blood cell displacement front at higher hematocrits. We also evaluate by ultrasounds the effect of red cell deposition on the temporal evolution of sample rigidity and adhesiveness.
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Affiliation(s)
- Luca Lanotte
- Centre de Biochimie Structurale CBS, CNRS UMR 5048-INSERM UMR 1054, University of Montpellier, 34090, France
| | - Didier Laux
- Institut d'Electronique et des Systèmes IES, CNRS UMR 5214, University of Montpellier, Montpellier, 34000, France
| | - Benoît Charlot
- Institut d'Electronique et des Systèmes IES, CNRS UMR 5214, University of Montpellier, Montpellier, 34000, France
| | - Manouk Abkarian
- Centre de Biochimie Structurale CBS, CNRS UMR 5048-INSERM UMR 1054, University of Montpellier, 34090, France
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25
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Wang M, Brady JF. Microstructures and mechanics in the colloidal film drying process. SOFT MATTER 2017; 13:8156-8170. [PMID: 29075714 DOI: 10.1039/c7sm01585b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We use Brownian Dynamics (BD) simulations and continuum models to study the microstructures and mechanics in the colloidal film drying process. Colloidal suspensions are compressed between a planar moving interface and a stationary substrate. In the BD simulations, we develop a new Energy Minimization Potential-Free (EMPF) algorithm to enforce the hard-sphere potential in confined systems and to accurately measure the stress profile. The interface moves either at a constant velocity Uw or via a constant imposed normal stress Σe. Comparing the interface motions to the particle Brownian motion defines the Péclet numbers PeU = Uwa/d0 and PeΣ = Σea3/kBT, respectively, where d0 = kBT/ζ with kBT the thermal energy scale, ζ the single-particle resistance, and a the particle radius. With a constant interface velocity, thermodynamics drives the suspension behavior when PeU ≪ 1, and homogeneous crystallization appears when the gap spacing between the two boundaries pushes the volume fraction above the equilibrium phase boundary. In contrast, when PeU ≫ 1, local epitaxial crystal growth appears adjacent to the moving interface even for large gap sizes. Interestingly, the most amorphous film microstructures are found at moderate PeU. The film stress profile develops sharp transitions and becomes step-like with growing Péclet number. With a constant imposed stress, the interface stops moving as the suspension pressure increases and the microstructural and mechanical behaviors are similar to the constant velocity case. Comparison with the simulations shows that the model accurately captures the stress on the moving interface, and quantitatively resolves the local stress and volume fraction distributions for low to moderate Péclet numbers. This work demonstrates the critical role of interface motion on the film microstructures and stresses.
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Affiliation(s)
- Mu Wang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.
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26
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Sato N, Yamanaka J, Toyotama A, Okuzono T. Colloidal Crystals with Low Crack Densities Formed on Polymer Hydrogel Surfaces. CHEM LETT 2017. [DOI: 10.1246/cl.170086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naoko Sato
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe, Mizuho, Nagoya, Aichi 467-8603
| | - Junpei Yamanaka
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe, Mizuho, Nagoya, Aichi 467-8603
| | - Akiko Toyotama
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe, Mizuho, Nagoya, Aichi 467-8603
| | - Tohru Okuzono
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe, Mizuho, Nagoya, Aichi 467-8603
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27
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Ryu SA, Kim JY, Kim SY, Weon BM. Drying-mediated patterns in colloid-polymer suspensions. Sci Rep 2017; 7:1079. [PMID: 28439069 PMCID: PMC5430651 DOI: 10.1038/s41598-017-00932-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 03/17/2017] [Indexed: 11/09/2022] Open
Abstract
Drying-mediated patterning of colloidal particles is a physical phenomenon that must be understood in inkjet printing technology to obtain crack-free uniform colloidal films. Here we experimentally study the drying-mediated patterns of a model colloid-polymer suspension and specifically observe how the deposit pattern appears after droplet evaporation by varying particle size and polymer concentration. We find that at a high polymer concentration, the ring-like pattern appears in suspensions with large colloids, contrary to suppression of ring formation in suspensions with small colloids thanks to colloid-polymer interactions. We attribute this unexpected reversal behavior to hydrodynamics and size dependence of colloid-polymer interactions. This finding would be very useful in developing control of drying-mediated self-assembly to produce crack-free uniform patterns from colloidal fluids.
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Affiliation(s)
- Seul-A Ryu
- Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Korea
| | - Jin Young Kim
- Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Korea
| | - So Youn Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Korea
| | - Byung Mook Weon
- Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Korea.
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28
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Schneider M, Maurath J, Fischer SB, Weiß M, Willenbacher N, Koos E. Suppressing Crack Formation in Particulate Systems by Utilizing Capillary Forces. ACS APPLIED MATERIALS & INTERFACES 2017; 9:11095-11105. [PMID: 28263554 PMCID: PMC5375100 DOI: 10.1021/acsami.6b13624] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Cracks, formed during the drying of particulate films, can reduce the effectiveness or even render products useless. We present a novel, generic approach to suppress crack formation in thin films made from hard particle suspensions, which are otherwise highly susceptible to cracking, using the capillary force between particles present when a trace amount of an immiscible liquid is added to a suspension. This secondary liquid preserves the particle cohesion, modifying the structure and increasing the drying rate. Crack-free films can be produced at thicknesses much greater than the critical cracking thickness for a suspension without capillary interactions, and even persists after sintering. This capillary suspension strategy is applicable to a broad range of materials, including suspensions of metals, semiconductive and ceramic oxides, or glassy polymeric particles, and can be easily implemented in many industrial processes since it is based on well-established unit operations. Promising fields of application include ceramic foils and printed electronic devices.
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Affiliation(s)
- Monica Schneider
- Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology, Gotthard-Franz-Straße 3, 76131 Karlsruhe, Germany
| | - Johannes Maurath
- Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology, Gotthard-Franz-Straße 3, 76131 Karlsruhe, Germany
| | - Steffen B. Fischer
- Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology, Gotthard-Franz-Straße 3, 76131 Karlsruhe, Germany
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200f, 3001 Leuven, Belgium
| | - Moritz Weiß
- Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology, Gotthard-Franz-Straße 3, 76131 Karlsruhe, Germany
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200f, 3001 Leuven, Belgium
| | - Norbert Willenbacher
- Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology, Gotthard-Franz-Straße 3, 76131 Karlsruhe, Germany
| | - Erin Koos
- Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology, Gotthard-Franz-Straße 3, 76131 Karlsruhe, Germany
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200f, 3001 Leuven, Belgium
- Corresponding Author,
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29
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Wooh S, Lee S, Lee Y, Ryu JH, Lee WB, Yoon H, Char K. Isolated Mesoporous Microstructures Prepared by Stress Localization-Induced Crack Manipulation. ACS NANO 2016; 10:9259-9266. [PMID: 27617907 DOI: 10.1021/acsnano.6b03044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Cracks observed in brittle materials are mostly regarded as defects or failures. However, they can be a valuable tool when implemented in a controlled way. Here, we introduce a strategy to control the crack propagation of mesoporous micropatterns (prisms and pyramids), which leads to the isolation of well-defined microstructures. Mesoporous micropatterns were fabricated by the soft imprinting technique with wet TiO2 nanoparticle (NP) pastes, followed by sintering to remove organic components. Since the volume of the paste significantly shrinks during the sintering step, stress is localized at the edge of micropatterns, in good agreement with finite element method simulations, creating well-defined cracks and their propagation. It was demonstrated that the degree of stress localization is determined by the thickness of residual layers, NP size, and heating rate. After controlled crack propagation and delamination of microparticles from the substrates, mesoporous microwires and microparticles were successfully produced and functionalized from the isolated mesoporous prisms and pyramids. The method proposed in this study for controlled crack manipulation and delamination opens a door for straightforward and economical fabrication of well-defined mesoporous microparticles.
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Affiliation(s)
- Sanghyuk Wooh
- The National Creative Research Initiative Center for Intelligent Hybrids, The World Class University Program for Chemical Convergence for Energy and Environment, School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Soojin Lee
- The National Creative Research Initiative Center for Intelligent Hybrids, The World Class University Program for Chemical Convergence for Energy and Environment, School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Yunchan Lee
- The National Creative Research Initiative Center for Intelligent Hybrids, The World Class University Program for Chemical Convergence for Energy and Environment, School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Ji Ho Ryu
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Won Bo Lee
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Hyunsik Yoon
- Department of Chemical and Biomolecular Engineering, Seoul National University of Science & Technology , Seoul 01811, Republic of Korea
| | - Kookheon Char
- The National Creative Research Initiative Center for Intelligent Hybrids, The World Class University Program for Chemical Convergence for Energy and Environment, School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
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30
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31
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Role of particle shape anisotropy on crack formation in drying of colloidal suspension. Sci Rep 2016; 6:30708. [PMID: 27477261 PMCID: PMC4967893 DOI: 10.1038/srep30708] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 07/07/2016] [Indexed: 11/09/2022] Open
Abstract
Cracks in a colloidal film formed by evaporation induced drying can be controlled by changing drying conditions. We show, for the first time that the crack morphologies in colloidal films are dependent on shape of constituting particles apart from the microstructure and particle assembly. In order to investigate the particle shape effect on crack patterns, monodispered spherical and ellipsoidal particles are used in sessile drop experiments. On observing the dried sessile drop we found cracks along the radial direction for spherical particle dispersions and circular crack patterns for ellipsoidal particle dispersions. The change in crack pattern is a result of self assembly of shape anisotropic particles and their ordering. The ordering of particles dictate the crack direction and the cracks follow the path of least resistance to release the excess stress stored in the particle film. Ellipsoids having different aspect ratio (~3 to 7) are used and circular crack patterns are repeatedly observed in all experiments.
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32
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Dipolar colloids in apolar media: direct microscopy of two-dimensional suspensions. Sci Rep 2016; 6:28578. [PMID: 27346611 PMCID: PMC4921927 DOI: 10.1038/srep28578] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 06/06/2016] [Indexed: 02/07/2023] Open
Abstract
Spherical colloids, in an absence of external fields, are commonly assumed to interact solely through rotationally-invariant potentials, u(r). While the presence of permanent dipoles in aqueous suspensions has been previously suggested by some experiments, the rotational degrees of freedom of spherical colloids are typically neglected. We prove, by direct experiments, the presence of permanent dipoles in commonly used spherical poly(methyl methacrylate) (PMMA) colloids, suspended in an apolar organic medium. We study, by a combination of direct confocal microscopy, computer simulations, and theory, the structure and other thermodynamical properties of organic suspensions of colloidal spheres, confined to a two-dimensional (2D) monolayer. Our studies reveal the effects of the dipolar interactions on the structure and the osmotic pressure of these fluids. These observations have far-reaching consequences for the fundamental colloidal science, opening new directions in self-assembly of complex colloidal clusters.
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33
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Tam SK, Fung KY, Poon GSH, Ng KM. Product design: Metal nanoparticle-based conductive inkjet inks. AIChE J 2016. [DOI: 10.1002/aic.15271] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sze Kee Tam
- Dept. of Chemical and Biomolecular Engineering; The Hong Kong University of Science and Technology; Clear Water Bay Hong Kong
| | - Ka Yip Fung
- Dept. of Chemical and Biomolecular Engineering; The Hong Kong University of Science and Technology; Clear Water Bay Hong Kong
| | - Grace Sum Hang Poon
- Dept. of Chemical and Biomolecular Engineering; The Hong Kong University of Science and Technology; Clear Water Bay Hong Kong
| | - Ka Ming Ng
- Dept. of Chemical and Biomolecular Engineering; The Hong Kong University of Science and Technology; Clear Water Bay Hong Kong
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34
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Wang Z, Ye W, Luo X, Wang Z. Heat-Resistant Crack-Free Superhydrophobic Polydivinylbenzene Colloidal Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3079-3084. [PMID: 26986041 DOI: 10.1021/acs.langmuir.6b00328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Highly cross-linked poly(divinylbenzene) (PDVB) spherical colloidal particles with nano-, submicron-, and micron-sizes of 157.2 nm, 602.1 nm, and 5.1 μm were synthesized through emulsion and dispersion polymerization methods. The influences of particle size on the surface morphology, roughness, superhydrophobicity, and critical cracking thickness of colloidal films were studied in detail. The results show that PDVB colloidal films possess large water contact angle (CA) over 151°, belonging to superhydrophobic materials. Moreover, it is interesting to observe that the highly cross-linked network structure leads to PDVB film's excellent heat-resistance. The CA and rough surface morphology remain nearly unchanged after thermal-treatment of films at 150 °C for 24 h. In addition, no cracks were observed in films with thicknesses up to 8.1 μm, exceeding most of polymer and inorganic particle films reported in the literature. The simple and scalable preparation method, low-cost, superhydrophobicity, and excellent thermal stability endow the PDVB colloidal films with promising applications in advanced coating fields, especially when employed in the high-temperature service environment.
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Affiliation(s)
- Zefeng Wang
- Department of Polymer Science and Materials, School of Chemical Engineering, Dalian University of Technology , Dalian 116024, China
| | - Weiwei Ye
- Department of Polymer Science and Materials, School of Chemical Engineering, Dalian University of Technology , Dalian 116024, China
| | - Xinran Luo
- Department of Polymer Science and Materials, School of Chemical Engineering, Dalian University of Technology , Dalian 116024, China
| | - Zhonggang Wang
- Department of Polymer Science and Materials, School of Chemical Engineering, Dalian University of Technology , Dalian 116024, China
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van der Kooij HM, van de Kerkhof GT, Sprakel J. A mechanistic view of drying suspension droplets. SOFT MATTER 2016; 12:2858-67. [PMID: 26843025 DOI: 10.1039/c5sm02406d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
When a dispersion droplet dries, a rich variety of spatial and temporal heterogeneities emerge. Controlling these phenomena is essential for many applications yet requires a thorough understanding of the underlying mechanisms. Although the process of film formation from initially dispersed polymer particles is well documented and is known to involve three main stages - evaporation, particle deformation and coalescence - it is impossible to fully disentangle the effects of particle deformation and coalescence, as these stages are closely linked. We circumvent this problem by studying suspensions of colloidal rubber particles that are incapable of coalescing. Varying the crosslink density allows us to tune the particle deformability in a controlled manner. We develop a theoretical framework of the main regimes and stresses in drying droplets of these suspensions, and validate this framework experimentally. Specifically, we show that changing the particle modulus by less than an order of magnitude can completely alter the stress development and resulting instabilities. Scanning electron microscopy reveals that particle deformability is a key factor in stress mitigation. Our model is the suspension equivalent of the widely used Routh-Russel model for film formation in drying dispersions, with additional focus on lateral nonuniformities such as cracking and wrinkling inherent to the droplet geometry, thus adding a new dimension to the conventional view of particle deformation.
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Affiliation(s)
- Hanne M van der Kooij
- Physical Chemistry and Soft Matter, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands. and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Gea T van de Kerkhof
- Physical Chemistry and Soft Matter, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands.
| | - Joris Sprakel
- Physical Chemistry and Soft Matter, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands.
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