1
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Sheng S, Fang Z, Yang H, Fang H. Simultaneously Suppressing the Coffee Ring Effect of Solutes with Different Sizes. J Phys Chem B 2023. [PMID: 38049382 DOI: 10.1021/acs.jpcb.3c04973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Suppressing the coffee ring effect (CRE), which improves the uniformity of deposition, has attracted great attention. Usually, a realistic system contains solutes of various sizes. Large particles preferentially settle onto the substrate under gravity, separated from small particles even when CRE is suppressed, which generates nonuniformity in another way. This hinders small particles from filling the gaps at the deposition-substrate interface, leaving a frail deposition. Here, the CRE of polydispersed solutes is simultaneously suppressed, and a more uniform deposition is achieved by suspending the drop together with adding trace amounts of cations. The gaps tend to be filled, which makes the deposition bind more tightly. Analysis shows that gravity coordinates with the interactions that mediate the attraction between particles and the substrate, resulting in the coinstantaneous adsorption of all particles. This work adds another dimension to the suppression of CRE, improving the uniformity of deposition in complex systems and paving the way for the development of techniques in diverse manufacturing industries.
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Affiliation(s)
- Shiqi Sheng
- School of Physics, East China University of Science and Technology, Shanghai 200237, China
| | - Zhening Fang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Haijun Yang
- Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Haiping Fang
- School of Physics, East China University of Science and Technology, Shanghai 200237, China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
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2
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Pal A, Gope A, Sengupta A. Drying of bio-colloidal sessile droplets: Advances, applications, and perspectives. Adv Colloid Interface Sci 2023; 314:102870. [PMID: 37002959 DOI: 10.1016/j.cis.2023.102870] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 03/03/2023] [Accepted: 03/03/2023] [Indexed: 04/03/2023]
Abstract
Drying of biologically-relevant sessile droplets, including passive systems such as DNA, proteins, plasma, and blood, as well as active microbial systems comprising bacterial and algal dispersions, has garnered considerable attention over the last decades. Distinct morphological patterns emerge when bio-colloids undergo evaporative drying, with significant potential in a wide range of biomedical applications, spanning bio-sensing, medical diagnostics, drug delivery, and antimicrobial resistance. Consequently, the prospects of novel and thrifty bio-medical toolkits based on drying bio-colloids have driven tremendous progress in the science of morphological patterns and advanced quantitative image-based analysis. This review presents a comprehensive overview of bio-colloidal droplets drying on solid substrates, focusing on the experimental progress during the last ten years. We provide a summary of the physical and material properties of relevant bio-colloids and link their native composition (constituent particles, solvent, and concentrations) to the patterns emerging due to drying. We specifically examined the drying patterns generated by passive bio-colloids (e.g., DNA, globular, fibrous, composite proteins, plasma, serum, blood, urine, tears, and saliva). This article highlights how the emerging morphological patterns are influenced by the nature of the biological entities and the solvent, micro- and global environmental conditions (temperature and relative humidity), and substrate attributes like wettability. Crucially, correlations between emergent patterns and the initial droplet compositions enable the detection of potential clinical abnormalities when compared with the patterns of drying droplets of healthy control samples, offering a blueprint for the diagnosis of the type and stage of a specific disease (or disorder). Recent experimental investigations of pattern formation in the bio-mimetic and salivary drying droplets in the context of COVID-19 are also presented. We further summarized the role of biologically active agents in the drying process, including bacteria, algae, spermatozoa, and nematodes, and discussed the coupling between self-propulsion and hydrodynamics during the drying process. We wrap up the review by highlighting the role of cross-scale in situ experimental techniques for quantifying sub-micron to micro-scale features and the critical role of cross-disciplinary approaches (e.g., experimental and image processing techniques with machine learning algorithms) to quantify and predict the drying-induced features. We conclude the review with a perspective on the next generation of research and applications based on drying droplets, ultimately enabling innovative solutions and quantitative tools to investigate this exciting interface of physics, biology, data sciences, and machine learning.
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Affiliation(s)
- Anusuya Pal
- University of Warwick, Department of Physics, Coventry CV47AL, West Midlands, UK; Worcester Polytechnic Institute, Department of Physics, Worcester 01609, MA, USA.
| | - Amalesh Gope
- Tezpur University, Department of Linguistics and Language Technology, Tezpur 784028, Assam, India
| | - Anupam Sengupta
- University of Luxembourg, Physics of Living Matter, Department of Physics and Materials Science, Luxembourg L-1511, Luxembourg
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3
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Zhang G, Zhang H, Yu R, Duan Y, Huang Y, Yin Z. Critical Size/Viscosity for Coffee-Ring-Free Printing of Perovskite Micro/Nanopatterns. ACS APPLIED MATERIALS & INTERFACES 2022; 14:14712-14720. [PMID: 35297596 DOI: 10.1021/acsami.1c23630] [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
Inkjet printing is the most encouraging method for patterning and integrating perovskite materials into microminiature application scenarios. However, it is still challenging to achieve high-resolution, coffee-ring-free, and perfect crystallized patterns. Here, a strategy based on powerful electrohydrodynamic printing and droplet viscosity-size coordinate regulation is developed to solve the above problems. By adding a long-chain polymer poly(vinylpyrrolidone) (PVP) into perovskite precursor to tune ink viscosity and introducing electrohydrodynamic printing to print the high-viscosity ink into droplets of different sizes, we can manipulate the inside flowing resistance and outside evaporation rate of a droplet, thus revealing a critical size/viscosity under which the coffee ring effect is inhibited, showing immense potential and significance for high-quality patterning. In addition, the long-chain polymer benefits droplet spatial limitation and uniform crystallization. The as-printed luminous patterns demonstrate high resolution (structure size ∼1 μm), excellent brightness, pleasant uniformity, and fascinating compatibility with flexible substrates, which is promising for future perovskite optoelectronic device applications.
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Affiliation(s)
- Guannan Zhang
- State Key Laboratory of Digital Manufacture Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hanyuan Zhang
- State Key Laboratory of Digital Manufacture Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Rui Yu
- State Key Laboratory of Digital Manufacture Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yongqing Duan
- State Key Laboratory of Digital Manufacture Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - YongAn Huang
- State Key Laboratory of Digital Manufacture Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhouping Yin
- State Key Laboratory of Digital Manufacture Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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4
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Patterns in Dried Droplets to Detect Unfolded BSA. SENSORS 2022; 22:s22031156. [PMID: 35161907 PMCID: PMC8839909 DOI: 10.3390/s22031156] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/28/2022] [Accepted: 01/30/2022] [Indexed: 12/12/2022]
Abstract
The morphological analysis of patterns in dried droplets has allowed the generation of efficient techniques for the detection of molecules of medical interest. However, the effectiveness of this method to reveal the coexistence of macromolecules of the same species, but different conformational states, is still unknown. To address this problem, we present an experimental study on pattern formation in dried droplets of bovine serum albumin (BSA), in folded and unfolded conformational states, in saline solution (NaCl). Folded proteins produce a well-defined coffee ring and crystal patterns all over the dry droplet. Depending on the NaCl concentration, the crystals can be small, large, elongated, entangled, or dense. Optical microscopy reveals that the relative concentration of unfolded proteins determines the morphological characteristics of deposits. At a low relative concentration of unfolded proteins (above 2%), small amorphous aggregates emerge in the deposits, while at high concentrations (above 16%), the “eye-like pattern”, a large aggregate surrounded by a uniform coating, is produced. The radial intensity profile, the mean pixel intensity, and the entropy make it possible to characterize the patterns in dried droplets. We prove that it is possible to achieve 100% accuracy in identifying 4% of unfolded BSA contained in a protein solution.
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5
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Ponzini E, Ami D, Duse A, Santambrogio C, De Palma A, Di Silvestre D, Mauri P, Pezzoli F, Natalello A, Tavazzi S, Grandori R. Single-Tear Proteomics: A Feasible Approach to Precision Medicine. Int J Mol Sci 2021; 22:10750. [PMID: 34639092 PMCID: PMC8509675 DOI: 10.3390/ijms221910750] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 09/28/2021] [Accepted: 09/29/2021] [Indexed: 12/23/2022] Open
Abstract
Lacrimal fluid is an attractive source of noninvasive biomarkers, the main limitation being the small sample amounts typically collected. Advanced analytical methods to allow for proteomics profiling from a few microliters are needed to develop innovative biomarkers, with attractive perspectives of applications to precision medicine. This work describes an effective, analytical pipeline for single-tear analysis by ultrahigh-resolution, shotgun proteomics from 23 healthy human volunteers, leading to high-confidence identification of a total of 890 proteins. Highly reproducible quantification was achieved by either peak intensity, peak area, or spectral counting. Hierarchical clustering revealed a stratification of females vs. males that did not emerge from previous studies on pooled samples. Two subjects were monitored weekly over 3 weeks. The samples clustered by withdrawal time of day (morning vs. afternoon) but not by follow-up week, with elevated levels of components of the immune system in the morning samples. This study demonstrates feasibility of single-tear quantitative proteomics, envisaging contributions of this unconventional body fluid to individualized approaches in biomedicine.
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Affiliation(s)
- Erika Ponzini
- Materials Science Department, University of Milano-Bicocca, Via R. Cozzi 55, 20125 Milan, Italy; (A.D.); (F.P.); (S.T.)
| | - Diletta Ami
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy; (D.A.); (C.S.); (A.N.)
| | - Alessandro Duse
- Materials Science Department, University of Milano-Bicocca, Via R. Cozzi 55, 20125 Milan, Italy; (A.D.); (F.P.); (S.T.)
| | - Carlo Santambrogio
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy; (D.A.); (C.S.); (A.N.)
| | - Antonella De Palma
- Institute of Technologies in Biomedicine, National Research Council (ITB-CNR), Via Fratelli Cervi 93, 20090 Segrate, Italy; (A.D.P.); (D.D.S.); (P.M.)
| | - Dario Di Silvestre
- Institute of Technologies in Biomedicine, National Research Council (ITB-CNR), Via Fratelli Cervi 93, 20090 Segrate, Italy; (A.D.P.); (D.D.S.); (P.M.)
| | - Pierluigi Mauri
- Institute of Technologies in Biomedicine, National Research Council (ITB-CNR), Via Fratelli Cervi 93, 20090 Segrate, Italy; (A.D.P.); (D.D.S.); (P.M.)
| | - Fabio Pezzoli
- Materials Science Department, University of Milano-Bicocca, Via R. Cozzi 55, 20125 Milan, Italy; (A.D.); (F.P.); (S.T.)
| | - Antonino Natalello
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy; (D.A.); (C.S.); (A.N.)
| | - Silvia Tavazzi
- Materials Science Department, University of Milano-Bicocca, Via R. Cozzi 55, 20125 Milan, Italy; (A.D.); (F.P.); (S.T.)
| | - Rita Grandori
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy; (D.A.); (C.S.); (A.N.)
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6
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Iervolino F, Suriano R, Scolari M, Gelmi I, Castoldi L, Levi M. Inkjet Printing of a Benzocyclobutene-Based Polymer as a Low-k Material for Electronic Applications. ACS OMEGA 2021; 6:15892-15902. [PMID: 34179633 PMCID: PMC8223404 DOI: 10.1021/acsomega.1c01488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 05/14/2021] [Indexed: 05/07/2023]
Abstract
Polymeric materials with a low dielectric constant are widely used in the electronic industry due to their properties. In particular, polymer adhesives can be used in many applications such as wafer bonding and three-dimensional integration. Benzocyclobutene (BCB) is a very interesting material thanks to its excellent bonding behavior and dielectric properties. Usually, BCB is applied by spin-coating, although this technology does not allow the fabrication of complex patterns. To obtain complex patterns, it is necessary to use a printing technology, such as inkjet printing. However, inkjet printing of BCB-based inks has not yet been investigated. Here, we show the feasibility of printing complex patterns with a BCB-based ink, reaching a resolution of 130 μm. We demonstrate that with a proper dilution, BCB-based inks enter the printability window and drop ejection is achieved without the formation of satellite drops. In addition, we present the conditions in which there is an appearance of the coffee ring effect. Inks that feature a too high interaction with the substrate are more likely to show the coffee ring effect, deteriorating the printing quality. We also observe that it is possible to achieve a better film uniformity by increasing the number of printed layers, due to redissolution of the BCB-based polymer that helps to level possible inhomogeneities. Our work represents the starting point for an in-depth study of BCB-based polymer fabrication using jet printing technologies, as a comparison of the bonding quality obtained with different materials and different technologies could give more information and broaden the perspective regarding this field.
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Affiliation(s)
- Filippo Iervolino
- Department
of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy
| | - Raffaella Suriano
- Department
of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy
| | - Martina Scolari
- STMicroelectronics, Via Camillo Olivetti, 2, Agrate Brianza 20864, Monza and Brianza, Italy
| | - Ilaria Gelmi
- STMicroelectronics, Via Camillo Olivetti, 2, Agrate Brianza 20864, Monza and Brianza, Italy
| | - Laura Castoldi
- STMicroelectronics, Via Camillo Olivetti, 2, Agrate Brianza 20864, Monza and Brianza, Italy
| | - Marinella Levi
- Department
of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy
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7
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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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8
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Pereiro I, Cors JF, Pané S, Nelson BJ, Kaigala GV. Underpinning transport phenomena for the patterning of biomolecules. Chem Soc Rev 2019; 48:1236-1254. [PMID: 30671579 DOI: 10.1039/c8cs00852c] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Surface-based assays are increasingly being used in biology and medicine, which in turn demand increasing quantitation and reproducibility. This translates into more stringent requirements on the patterning of biological entities on surfaces (also referred to as biopatterning). This tutorial focuses on mass transport in the context of existing and emerging biopatterning technologies. We here develop a step-by-step analysis of how analyte transport affects surface kinetics, and of the advantages and limitations this entails in major categories of patterning methods, including evaporating sessile droplets, laminar flows in microfluidics or electrochemistry. Understanding these concepts is key to obtaining the desired pattern uniformity, coverage, analyte usage or processing time, and equally applicable to surface assays. A representative technological review accompanies each section, highlighting the technical progress enabled by transport control in e.g. microcontact printing, inkjet printing, dip-pen nanolithography and microfluidic probes. We believe this tutorial will serve researchers to better understand available patterning methods/principles, optimize conditions and to help design protocols/assays. By highlighting fundamental challenges and available approaches, we wish to trigger the development of new surface patterning methods and assays.
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Affiliation(s)
- Iago Pereiro
- IBM Research - Zurich, Säumerstrasse 4, Rüschlikon, 8803, Switzerland.
| | - Julien F Cors
- IBM Research - Zurich, Säumerstrasse 4, Rüschlikon, 8803, Switzerland. and Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, 8092, Switzerland
| | - Salvador Pané
- Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, 8092, Switzerland
| | - Bradley J Nelson
- Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, 8092, Switzerland
| | - Govind V Kaigala
- IBM Research - Zurich, Säumerstrasse 4, Rüschlikon, 8803, Switzerland.
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9
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Sett A, Ayushman M, Dasgupta S, DasGupta S. Analysis of the Distinct Pattern Formation of Globular Proteins in the Presence of Micro- and Nanoparticles. J Phys Chem B 2018; 122:8972-8984. [DOI: 10.1021/acs.jpcb.8b05325] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ayantika Sett
- Department of Chemical Engineering, Indian Institute of Technology, 721302 Kharagpur, India
| | - Manish Ayushman
- Department of Chemical Engineering, Indian Institute of Technology, 721302 Kharagpur, India
| | - Swagata Dasgupta
- Department of Chemistry, Indian Institute of Technology, 721302 Kharagpur, India
| | - Sunando DasGupta
- Department of Chemical Engineering, Indian Institute of Technology, 721302 Kharagpur, India
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10
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Texture analysis of protein deposits produced by droplet evaporation. Sci Rep 2018; 8:9580. [PMID: 29942029 PMCID: PMC6018122 DOI: 10.1038/s41598-018-27959-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 06/12/2018] [Indexed: 11/25/2022] Open
Abstract
The deposit patterns derived from droplet evaporation allow current development of medical tests and new strategies for diagnostic in patients. For such purpose, the development and implementation of algorithms capable of characterizing and differentiating deposits are crucial elements. We report the study of deposit patterns formed by the droplet evaporation of binary mixtures of proteins containing NaCl. Optical microscopy reveals aggregates such as tip arrow-shaped, dendritic and semi-rosette patterns, needle-like and scalloped lines structures, as well as star-like and prism-shaped salt crystals. We use the first-order statistics (FOS) and gray level co-occurrence matrix (GLCM) to characterize the complex texture of deposit patterns. Three significant findings arise from this analysis: first, the FOS and GLCM parameters structurally characterize protein deposits. Secondly, they conform to simple exponential laws that change as a function of the NaCl concentration. Finally, the parameters are capable of revealing the different structural changes that occur during the droplet evaporation.
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11
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Sett A, Dasgupta S, DasGupta S. Rapid estimation of the β-sheet content of Human Serum Albumin from the drying patterns of HSA-nanoparticle droplets. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.12.064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Carreón YJP, González-Gutiérrez J, Pérez-Camacho MI, Mercado-Uribe H. Patterns produced by dried droplets of protein binary mixtures suspended in water. Colloids Surf B Biointerfaces 2017; 161:103-110. [PMID: 29055238 DOI: 10.1016/j.colsurfb.2017.10.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 10/06/2017] [Accepted: 10/09/2017] [Indexed: 12/31/2022]
Abstract
Patterns formed by the evaporation of a drop containing biological molecules have provided meaningful information about certain pathologies. In this context, several works propose the study of protein solutions as a model to understand the formation of deposits of biological fluids. Generally, dry droplets of proteins in a saline solution create complex aggregates. Here, we present an experimental study on the formation of patterns produced by the evaporation of droplet suspensions containing a protein binary mixture. We explore the structural aspect of such deposits by using optical and atomic force microscopy. We found that salt is unnecessary for the formation of complex structures such as crystal clusters, dendritic and undulated branches, and interlocked chains. Such structural features allow us to differentiate among protein binary mixtures. Finally, we discuss the potential use of this finding to reveal the presence of a protein suspensions, the folded and unfolded state of a protein, as well as their structural changes.
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13
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Seong B, Park HS, Chae I, Lee H, Wang X, Jang HS, Jung J, Lee C, Lin L, Byun D. Self-Assembly of Silver Nanowire Ring Structures Driven by the Compressive Force of a Liquid Droplet. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3367-3372. [PMID: 28287742 DOI: 10.1021/acs.langmuir.7b00361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In a nanowire dispersed in liquid droplets, the interplay between the surface tension of the liquid and the elasticity of the nanowire determines the final morphology of the bent or buckled nanowire. Here, we investigate the fabrication of a silver nanowire ring generated as the nanowire encapsulated inside of fine droplets. We used a hybrid aerodynamic and electrostatic atomization method to ensure the generation of droplets with scalable size in the necessary regime for ring formation. We analytically calculate the compressive force of the droplet driven by surface tension as the key mechanism for the self-assembly of ring structures. Thus, for potential large-scale manufacturing, the droplet size provides a convenient parameter to control the realization of ring structures from nanowires.
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Affiliation(s)
- Baekhoon Seong
- Department of Mechanical Engineering, Sungkyunkwan University , 2066 Seobu-Ro, Jangan-Gu, Suwon, Gyeonggi 440-746, Republic of Korea
- Korea Institute of Ocean Science and Technology , Ansan 426-444, Republic of Korea
| | - Hyun Sung Park
- Department of Mechanical Engineering, University of California, Berkeley , Berkeley 94720, United States
| | - Ilkyeong Chae
- Department of Mechanical Engineering, Sungkyunkwan University , 2066 Seobu-Ro, Jangan-Gu, Suwon, Gyeonggi 440-746, Republic of Korea
| | - Hyungdong Lee
- Department of Mechanical Engineering, Sungkyunkwan University , 2066 Seobu-Ro, Jangan-Gu, Suwon, Gyeonggi 440-746, Republic of Korea
| | - Xiaofeng Wang
- Department of Mechanical Engineering, Sungkyunkwan University , 2066 Seobu-Ro, Jangan-Gu, Suwon, Gyeonggi 440-746, Republic of Korea
| | - Hyung-Seok Jang
- Department of Mechanical Engineering, University of California, Berkeley , Berkeley 94720, United States
| | - Jaehyuck Jung
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University , 2066 Seobu-ro, Suwon, Gyeonggi 440-746, Republic of Korea
| | - Changgu Lee
- Department of Mechanical Engineering, Sungkyunkwan University , 2066 Seobu-Ro, Jangan-Gu, Suwon, Gyeonggi 440-746, Republic of Korea
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University , 2066 Seobu-ro, Suwon, Gyeonggi 440-746, Republic of Korea
| | - Liwei Lin
- Department of Mechanical Engineering, University of California, Berkeley , Berkeley 94720, United States
| | - Doyoung Byun
- Department of Mechanical Engineering, Sungkyunkwan University , 2066 Seobu-Ro, Jangan-Gu, Suwon, Gyeonggi 440-746, Republic of Korea
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14
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Rajabi MT, Sharifzadeh M. "Coffee Ring Effect" in Ophthalmology: "Anionic Dye Deposition" Hypothesis Explaining Normal Lid Margin Staining. Medicine (Baltimore) 2016; 95:e3137. [PMID: 27057835 PMCID: PMC4998751 DOI: 10.1097/md.0000000000003137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The process of formation of Marx line is studied in this article. Various theories have been proposed previously, in order to explain the mechanisms which lead to the development of Marx line. These theories are based on the characteristics of stained area and do not pay attention to the behavior of dye solution itself on the surface. The aim of this study is to investigate the latter behavior and introduce a new theory based on it, in order to explain the process of the Marx line formation.This study also introduces "Coffee Ring Effect" and its possible applications in explaining some ophthalmological phenomena.The effect of dye solution's behavior on the beneath surface is adopted in order to propose a novel theory. This new hypothesis is called "Anionic Dye Deposition" which was based on "Coffee Ring Effect" phenomenon. For evaluation of this theory, Evaporation pattern of Rose Bengal and fluorescein were analyzed on different surfaces. Furthermore, the effect of tear meniscus alteration on lid margin staining is studied.During the evaporation process of dye solutions, it was observed that almost all of the solute was deposited at the edge of the drop on hydrophilic surfaces. Furthermore, in the study of lid margin staining, it is observed that tear meniscus alteration during gaze affects staining pattern. This observation invalidates former hypotheses which only focus on stained surface characteristics.According to the observations in this study, it is proposed that Marx line staining occurs as a result of "anionic dye deposition" due to evaporation.
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Affiliation(s)
- Mohammad Taher Rajabi
- From the Farabi Eye Hospital (MTR, MS), Tehran University of Medical Sciences, Tehran, Iran
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15
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Liu T, Luo H, Ma J, Xie W, Wang Y, Jing G. Surface roughness induced cracks of the deposition film from drying colloidal suspension. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2016; 39:24. [PMID: 26920527 DOI: 10.1140/epje/i2016-16024-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Accepted: 09/25/2015] [Indexed: 06/05/2023]
Abstract
We investigate crack formation in deposition films from drying colloidal suspension drops, by varying the roughness and texture of the substrate. The experimental results indicate that the crack number or crack spacing presents a general dependence on the substrate roughness, despite the orientation of the substrate textures. Interestingly, the crack spacing decreases with the increase of the roughness. Two possible mechanisms are proposed to understand the dependence of the cracks on roughness. Firstly, the concentration reduction of the drying suspension due to collecting colloidal particles from the substrate textures decreases the crack spacing. Secondly, stress concentration resulting from the defects (the notches in textures) in the dried deposition enhances crack formation. However, a quantitative estimation by the calculation of the stress concentrating factors reveals that the notch of the substrate textures dominates crack variation. The results here bring forth a practical method for controlling the crack orientation and suppression, and a potential application to crack-free coatings, films and paintings during the drying of complex fluids.
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Affiliation(s)
- Tingting Liu
- School of Physics, Northwest University, 710069, Xi'an, China
| | - Hao Luo
- School of Physics, Northwest University, 710069, Xi'an, China
| | - Jun Ma
- Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Weiguang Xie
- Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Yan Wang
- Beijing Aeronautical Science & Technology Research Institute of COMAC, 102211, Beijing>, China
| | - Guangyin Jing
- School of Physics, Northwest University, 710069, Xi'an, China.
- National Key Laboratory and Incubation Base of Photoelectric Technology and Functional Materials, Northwest University, 710069, Xian, China.
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16
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Sadek C, Schuck P, Fallourd Y, Pradeau N, Jeantet R, Le Floch-Fouéré C. Buckling and collapse during drying of a single aqueous dispersion of casein micelle droplet. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.06.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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17
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Interfacial force-driven pattern formation during drying of Aβ (25–35) fibrils. Int J Biol Macromol 2015; 79:344-52. [DOI: 10.1016/j.ijbiomac.2015.04.074] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Revised: 04/27/2015] [Accepted: 04/28/2015] [Indexed: 11/21/2022]
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18
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Drying of a single droplet to investigate process–structure–function relationships: a review. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s13594-014-0186-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Wang W, Yin Y, Tan Z, Liu J. Coffee-ring effect-based simultaneous SERS substrate fabrication and analyte enrichment for trace analysis. NANOSCALE 2014; 6:9588-9593. [PMID: 25014329 DOI: 10.1039/c4nr03198a] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Based on the "coffee-ring effect", we developed a highly efficient SERS platform which integrates the fabrication of SERS-active substrates and the preconcentration of analytes into one step. The high sensitivity, robustness, reproducibility and simplicity make this platform ideal for on-site analysis of small volume samples at low concentrations in complex matrices.
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Affiliation(s)
- Weidong Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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20
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Nguyen TAH, Nguyen AV. Transient volume of evaporating sessile droplets: 2/3, 1/1, or another power law? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6544-6547. [PMID: 24873776 DOI: 10.1021/la4047287] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The transient shape and volume of evaporating sessile droplets are critical to our understanding and prediction of deposits left over on the solid surface after droplet evaporation. The 2/3 power law of scaling, (V/Vo)(β) = 1 - t/tf with β = 2/3, has been widely used. The 1/1 power law of scaling with β = 1 was also obtained for vanishingly small contact angles. Here we show that β significantly deviates from 2/3 and 1 when the droplet base is pinned: β depends on both initial and transient contact angles. The 1/1 power law presents the upper limit of β = 1, while β = 2/3 is the lower limit if contact angles are smaller than 148°. Unexpectedly, β can be smaller than 2/3 if contact angles are larger than 148°. We also present a semianalytical approximation for β as a function of the initial contact angle.
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Affiliation(s)
- Tuan A H Nguyen
- School of Chemical Engineering, The University of Queensland , Brisbane, QLD 4072, Australia
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21
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Sadek C, Tabuteau H, Schuck P, Fallourd Y, Pradeau N, Le Floch-Fouéré C, Jeantet R. Shape, shell, and vacuole formation during the drying of a single concentrated whey protein droplet. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:15606-15613. [PMID: 24261716 DOI: 10.1021/la404108v] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The drying of milk concentrate droplets usually leads to specific particle morphology influencing their properties and their functionality. Understanding how the final shape of the particle is formed therefore represents a key issue for industrial applications. In this study, a new approach to the investigation of droplet-particle conversion is proposed. A single droplet of concentrated globular proteins extracted from milk was deposited onto a hydrophobic substrate and placed in a dry environment. Complementary methods (high-speed camera, confocal microscopy, and microbalance) were used to record the drying behavior of the concentrated protein droplets. Our results showed that whatever the initial concentration, particle formation included three dynamic stages clearly defined by the loss of mass and the evolution of the internal and external shapes of the droplet. A new and reproducible particle shape was related in this study. It was observed after drying a smooth, hemispherical cap-shaped particle, including a uniform protein shell and the nucleation of an internal vacuole. The particle morphology was strongly influenced by the drying environment, the contact angle, and the initial protein concentration, all of which governed the duration of the droplet shrinkage, the degree of buckling, and the shell thickness. These results are discussed in terms of specific protein behaviors in forming a predictable and a characteristic particle shape. The way the shell is formed may be the starting point in shaping particle distortion and thus represents a potential means of tuning the particle morphology.
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22
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Lu Y, Sturek M, Park K. Microparticles produced by the hydrogel template method for sustained drug delivery. Int J Pharm 2013; 461:258-69. [PMID: 24333903 DOI: 10.1016/j.ijpharm.2013.11.058] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 10/17/2013] [Accepted: 11/30/2013] [Indexed: 11/27/2022]
Abstract
Polymeric microparticles have been used widely for sustained drug delivery. Current methods of microparticle production can be improved by making homogeneous particles in size and shape, increasing the drug loading, and controlling the initial burst release. In the current study, the hydrogel template method was used to produce homogeneous poly(lactide-co-glycolide) (PLGA) microparticles and to examine formulation and process-related parameters. Poly(vinyl alcohol) (PVA) was used to make hydrogel templates. The parameters examined include PVA molecular weight, type of PLGA (as characterized by lactide content, inherent viscosity), polymer concentration, drug concentration and composition of solvent system. Three model compounds studied were risperidone, methylprednisolone acetate and paclitaxel. The ability of the hydrogel template method to produce microparticles with good conformity to template was dependent on molecular weight of PVA and viscosity of the PLGA solution. Drug loading and encapsulation efficiency were found to be influenced by PLGA lactide content, polymer concentration and composition of the solvent system. The drug loading and encapsulation efficiency were 28.7% and 82% for risperidone, 31.5% and 90% for methylprednisolone acetate, and 32.2% and 92% for paclitaxel, respectively. For all three drugs, release was sustained for weeks, and the in vitro release profile of risperidone was comparable to that of microparticles prepared using the conventional emulsion method. The hydrogel template method provides a new approach of manipulating microparticles.
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Affiliation(s)
- Ying Lu
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, IN 47906, USA
| | - Michael Sturek
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Kinam Park
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, IN 47906, USA; Department of Biomedical Engineering, Purdue University, West Lafayette, IN 47906, USA.
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