151
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Maximizing the Catalytic Activity of Nanoparticles through Monolayer Assembly on Nitrogen‐Doped Graphene. Angew Chem Int Ed Engl 2017; 57:451-455. [DOI: 10.1002/anie.201709815] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Indexed: 01/09/2023]
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152
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Yu C, Guo X, Shen M, Shen B, Muzzio M, Yin Z, Li Q, Xi Z, Li J, Seto CT, Sun S. Maximizing the Catalytic Activity of Nanoparticles through Monolayer Assembly on Nitrogen‐Doped Graphene. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Chao Yu
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Xuefeng Guo
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Mengqi Shen
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Bo Shen
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Michelle Muzzio
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Zhouyang Yin
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Qing Li
- School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China
| | - Zheng Xi
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Junrui Li
- Department of Chemistry Brown University Providence RI 02912 USA
| | | | - Shouheng Sun
- Department of Chemistry Brown University Providence RI 02912 USA
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153
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Mayarani M, Basavaraj MG, Satapathy DK. Loosely packed monolayer coffee stains in dried drops of soft colloids. NANOSCALE 2017; 9:18798-18803. [PMID: 29171611 DOI: 10.1039/c7nr06732a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report a complete suppression of the coffee-ring effect resulting in the formation of loosely packed two-dimensional particle monolayers by controlled evaporation of sessile drops containing soft microgel particles. These particulate deposits show gradual order-to-disorder transitions that are not abrupt like deposits of hard colloids. The areal coverage of the monolayer deposits can also be precisely controlled by tuning the particle concentration. The preferential adsorption of soft-microgel particles to the water-vapor interface, and their radial flow along the interface towards the drop edge facilitates the creation of the novel monolayer deposits.
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Affiliation(s)
- M Mayarani
- Soft Materials Laboratory, Department of Physics, IIT Madras, Chennai - 600036, India.
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154
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Telford AM, Thickett SC, Neto C. Functional patterned coatings by thin polymer film dewetting. J Colloid Interface Sci 2017; 507:453-469. [DOI: 10.1016/j.jcis.2017.07.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 06/28/2017] [Accepted: 07/02/2017] [Indexed: 01/20/2023]
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155
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Zhou J, Man X, Jiang Y, Doi M. Structure Formation in Soft-Matter Solutions Induced by Solvent Evaporation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1703769. [PMID: 29058825 DOI: 10.1002/adma.201703769] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/10/2017] [Indexed: 06/07/2023]
Abstract
Solvent evaporation in soft-matter solutions (solutions of colloidal particles, polymers, and their mixtures) is an important process in material making and in the printing and coating industries. The solvent-evaporation process determines the structure of materials and strongly affects their performance. Solvent evaporation involves many physicochemical processes: flow, diffusion, crystallization, gelation, glass transition, etc. and is quite complex. Here, recent progress in this important process is reported, with a special focus on theoretical and simulation studies.
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Affiliation(s)
- Jiajia Zhou
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
- Center of Soft Matter Physics and Its Applications, Beihang University, Beijing, 100191, P. R. China
| | - Xingkun Man
- Center of Soft Matter Physics and Its Applications, Beihang University, Beijing, 100191, P. R. China
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, P. R. China
| | - Ying Jiang
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
- Center of Soft Matter Physics and Its Applications, Beihang University, Beijing, 100191, P. R. China
| | - Masao Doi
- Center of Soft Matter Physics and Its Applications, Beihang University, Beijing, 100191, P. R. China
- Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, 100191, P. R. China
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156
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Kim BH, Heo J, Lee WC, Park J. Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles. J Vis Exp 2017. [PMID: 29155728 DOI: 10.3791/56335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Drying a nanoparticle dispersion is a versatile way to create self-assembled structures of nanoparticles, but the mechanism of this process is not fully understood. We have traced the trajectories of individual nanoparticles using liquid-cell transmission electron microscopy (TEM) to investigate the mechanism of the assembly process. Herein, we present the protocols used for liquid-cell TEM studies of the self-assembly mechanism. First, we introduce the detailed synthetic protocols used to produce uniformly sized platinum and lead selenide nanoparticles. Next, we present the microfabrication processes used to produce liquid cells with silicon nitride or silicon windows and then describe the loading and imaging procedures of the liquid-cell TEM technique. Several notes are included to provide helpful tips for the entire process, including how to manage the fragile cell windows. The individual motions of nanoparticles tracked by liquid-cell TEM revealed that changes in the solvent boundaries caused by evaporation affected the self-assembly process of nanoparticles. The solvent boundaries drove nanoparticles to primarily form amorphous aggregates, followed by flattening of the aggregates to produce a 2-dimensional (2D) self-assembled structure. These behaviors are also observed for different nanoparticle types and different liquid-cell compositions.
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Affiliation(s)
- Byung Hyo Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS); School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University
| | - Junyoung Heo
- Center for Nanoparticle Research, Institute for Basic Science (IBS); School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University
| | - Won Chul Lee
- Department of Mechanical Engineering, Hanyang University;
| | - Jungwon Park
- Center for Nanoparticle Research, Institute for Basic Science (IBS); School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University;
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157
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Das S, Dey A, Reddy G, Sarma DD. Suppression of the Coffee-Ring Effect and Evaporation-Driven Disorder to Order Transition in Colloidal Droplets. J Phys Chem Lett 2017; 8:4704-4709. [PMID: 28885853 DOI: 10.1021/acs.jpclett.7b01814] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Affiliation(s)
- Shyamashis Das
- Solid State and Structural
Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India
| | - Atreya Dey
- Solid State and Structural
Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India
| | - Govardhan Reddy
- Solid State and Structural
Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India
| | - D. D. Sarma
- Solid State and Structural
Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India
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158
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Skogberg A, Mäki AJ, Mettänen M, Lahtinen P, Kallio P. Cellulose Nanofiber Alignment Using Evaporation-Induced Droplet-Casting, and Cell Alignment on Aligned Nanocellulose Surfaces. Biomacromolecules 2017; 18:3936-3953. [DOI: 10.1021/acs.biomac.7b00963] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Panu Lahtinen
- VTT Technical Research
Center of Finland, Biologinkuja 7, 02150 Espoo, Finland
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159
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Jung N, Seo HW, Leo PH, Kim J, Kim P, Yoo CS. Surfactant effects on droplet dynamics and deposition patterns: a lattice gas model. SOFT MATTER 2017; 13:6529-6541. [PMID: 28895608 DOI: 10.1039/c7sm01224a] [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
A coarse-grained lattice gas model is developed to study pattern forming processes in drying drops containing surfactant. By performing Monte Carlo simulations of the model, the coupled dynamics of surfactant and liquid evaporation and the resulting oscillatory dynamics at the contact line are elucidated. We show that the coupled drop dynamics and the resulting final deposition patterns can be altered by adsorption kinetics. For slow adsorption rates, surfactant molecules recirculate along with colloidal particles and the area covered by the surfactant on the surface grows from the contact line as the initial concentration of the surfactant increases. This leads to coffee-ring patterns with wide rim areas upon drying or to multi-ring patterns depending on the surfactant concentration. For fast adsorption rates, a surfactant skin covers the entire surface area during the early phase of evaporation. This suppresses the coffee ring effect, and uniform patterns are obtained independent of surfactant concentration. The results suggest that the distribution of surfactant on the surface is critical in determining final deposition patterns and that understanding of the skin-forming process of the surfactant on the surface can help in manipulating the delicate pattern forming process of particles in evaporating drops.
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Affiliation(s)
- Narina Jung
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
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160
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Taniguchi Y, Sazali MAB, Kobayashi Y, Arai N, Kawai T, Nakashima T. Programmed Self-Assembly of Branched Nanocrystals with an Amphiphilic Surface Pattern. ACS NANO 2017; 11:9312-9320. [PMID: 28872823 DOI: 10.1021/acsnano.7b04719] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Site-selective surface modification on the shape-controlled nanocrystals is a key approach in the programmed self-assembly of inorganic colloidal materials. This study demonstrates a simple methodology to gain self-assemblies of semiconductor nanocrystals with branched shapes through tip-to-tip attachment. Short-chained water-soluble cationic thiols are employed as a surface ligand for CdSe tetrapods and CdSe/CdS core/shell octapods. Because of the less affinity of arm-tip to the surface ligands compared to the arm-side wall, the tip-surface becomes uncapped to give a hydrophobic nature, affording an amphiphilic surface pattern. The amphiphilic tetrapods aggregated into porous agglomerates through tip-to-tip connection in water, while they afforded a hexagonally arranged Kagome-like two-dimensional (2D) assembly by the simple casting of aqueous dispersion with the aid of a convective self-assembly mechanism. A 2D net-like assembly was similarly obtained from amphiphilic octapods. A dissipative particle dynamics simulation using a planar tripod model with an amphiphilic surface pattern reproduced the formation of the Kagome-like assembly in a 2D confined space, demonstrating that the lateral diffusion of nanoparticles and the firm contacts between the hydrophobic tips play crucial roles in the self-assembly.
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Affiliation(s)
- Yuki Taniguchi
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST) , Ikoma, Nara 630-0192, Japan
| | | | - Yusei Kobayashi
- Department of Mechanical Engineering, Kindai Unversity , Higashiosaka, Osaka 577-8502, Japan
| | - Noriyoshi Arai
- Department of Mechanical Engineering, Kindai Unversity , Higashiosaka, Osaka 577-8502, Japan
| | - Tsuyoshi Kawai
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST) , Ikoma, Nara 630-0192, Japan
| | - Takuya Nakashima
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST) , Ikoma, Nara 630-0192, Japan
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161
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Zhang Y, He Y, Yan N, Zhu Y, Hu Y. Inorganic Nanoparticle Induced Morphological Transition for Confined Self-Assembly of Block Copolymers within Emulsion Droplets. J Phys Chem B 2017; 121:8417-8425. [DOI: 10.1021/acs.jpcb.7b06701] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yan Zhang
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School
of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001, Liaoning, China
| | - Yun He
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Nan Yan
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yutian Zhu
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yuexin Hu
- School
of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001, Liaoning, China
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162
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Tan Z, Lou TT, Huang ZX, Zong J, Xu KX, Li QF, Chen D. Single-Drop Raman Imaging Exposes the Trace Contaminants in Milk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:6274-6281. [PMID: 28691485 DOI: 10.1021/acs.jafc.7b01814] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Better milk safety control can offer important means to promote public health. However, few technologies can detect different types of contaminants in milk simultaneously. In this regard, the present work proposes a single-drop Raman imaging (SDRI) strategy for semiquantitation of multiple hazardous factors in milk solutions. By developing SDRI strategy that incorporates the coffee-ring effect (a natural phenomenon often presents in a condensed circle pattern after a drop evaporated) for sample pretreatment and discrete wavelet transform for spectra processing, the method serves well to expose typical hazardous molecular species in milk products, such as melamine, sodium thiocyanate and lincomycin hydrochloride, with little sample preparation. The detection sensitivity for melamine, sodium thiocyanate, and lincomycin hydrochloride are 0.1 mg kg-1, 1 mg kg-1, and 0.1 mg kg-1, respectively. Theoretically, we establish that the SDRI represents a novel and environment-friendly method that screens the milk safety efficiently, which could be well extended to inspection of other food safety.
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Affiliation(s)
- Zong Tan
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University , Tianjin 300072, China
| | - Ting-Ting Lou
- School of Precision Instrument and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China
| | - Zhi-Xuan Huang
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University , Tianjin 300072, China
- Zhejiang Bigdata Co., Ltd. , 3-17 Feiyue Innovation Park, Jiaojiang District, Taizhou City, Zhejiang Province 318000, China
| | - Jing Zong
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University , Tianjin 300072, China
- Zhejiang Bigdata Co., Ltd. , 3-17 Feiyue Innovation Park, Jiaojiang District, Taizhou City, Zhejiang Province 318000, China
| | - Ke-Xin Xu
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University , Tianjin 300072, China
| | - Qi-Feng Li
- School of Precision Instrument and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China
| | - Da Chen
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University , Tianjin 300072, China
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163
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Choi S, Birarda G. Protein Mixture Segregation at Coffee-Ring: Real-Time Imaging of Protein Ring Precipitation by FTIR Spectromicroscopy. J Phys Chem B 2017; 121:7359-7365. [DOI: 10.1021/acs.jpcb.7b05131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Sun Choi
- Center
for Urban Energy Research, Korea Institutes of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Giovanni Birarda
- Elettra - Sincrotrone Trieste, Strada Statale 14 - km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
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164
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Hughes RA, Menumerov E, Neretina S. When lithography meets self-assembly: a review of recent advances in the directed assembly of complex metal nanostructures on planar and textured surfaces. NANOTECHNOLOGY 2017; 28:282002. [PMID: 28590253 DOI: 10.1088/1361-6528/aa77ce] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
One of the foremost challenges in nanofabrication is the establishment of a processing science that integrates wafer-based materials, techniques, and devices with the extraordinary physicochemical properties accessible when materials are reduced to nanoscale dimensions. Such a merger would allow for exacting controls on nanostructure positioning, promote cooperative phenomenon between adjacent nanostructures and/or substrate materials, and allow for electrical contact to individual or groups of nanostructures. With neither self-assembly nor top-down lithographic processes being able to adequately meet this challenge, advancements have often relied on a hybrid strategy that utilizes lithographically-defined features to direct the assembly of nanostructures into organized patterns. While these so-called directed assembly techniques have proven viable, much of this effort has focused on the assembly of periodic arrays of spherical or near-spherical nanostructures comprised of a single element. Work directed toward the fabrication of more complex nanostructures, while still at a nascent stage, has nevertheless demonstrated the possibility of forming arrays of nanocubes, nanorods, nanoprisms, nanoshells, nanocages, nanoframes, core-shell structures, Janus structures, and various alloys on the substrate surface. In this topical review, we describe the progress made in the directed assembly of periodic arrays of these complex metal nanostructures on planar and textured substrates. The review is divided into three broad strategies reliant on: (i) the deterministic positioning of colloidal structures, (ii) the reorganization of deposited metal films at elevated temperatures, and (iii) liquid-phase chemistry practiced directly on the substrate surface. These strategies collectively utilize a broad range of techniques including capillary assembly, microcontact printing, chemical surface modulation, templated dewetting, nanoimprint lithography, and dip-pen nanolithography and employ a wide scope of chemical processes including redox reactions, alloying, dealloying, phase separation, galvanic replacement, preferential etching, template-mediated reactions, and facet-selective capping agents. Taken together, they highlight the diverse toolset available when fabricating organized surfaces of substrate-supported nanostructures.
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Affiliation(s)
- Robert A Hughes
- College of Engineering, University of Notre Dame, Notre Dame, IN 46556, United States of America
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165
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Nasiri R, Luo KH. Specificity Switching Pathways in Thermal and Mass Evaporation of Multicomponent Hydrocarbon Droplets: A Mesoscopic Observation. Sci Rep 2017; 7:5001. [PMID: 28694476 PMCID: PMC5504037 DOI: 10.1038/s41598-017-05160-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 06/07/2017] [Indexed: 11/21/2022] Open
Abstract
For well over one century, the Hertz-Knudsen equation has established the relationship between thermal - mass transfer coefficients through a liquid - vapour interface and evaporation rate. These coefficients, however, have been often separately estimated for one-component equilibrium systems and their simultaneous influences on evaporation rate of fuel droplets in multicomponent systems have yet to be investigated at the atomic level. Here we first apply atomistic simulation techniques and quantum/statistical mechanics methods to understand how thermal and mass evaporation effects are controlled kinetically/thermodynamically. We then present a new development of a hybrid method of quantum transition state theory/improved kinetic gas theory, for multicomponent hydrocarbon systems to investigate how concerted-distinct conformational changes of hydrocarbons at the interface affect the evaporation rate. The results of this work provide an important physical concept in fundamental understanding of atomistic pathways in topological interface transitions of chain molecules, resolving an open problem in kinetics of fuel droplets evaporation.
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Affiliation(s)
- Rasoul Nasiri
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK.
| | - Kai H Luo
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK.
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166
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He M, Li B, Cui X, Jiang B, He Y, Chen Y, O’Neil D, Szymanski P, EI-Sayed MA, Huang J, Lin Z. Meniscus-assisted solution printing of large-grained perovskite films for high-efficiency solar cells. Nat Commun 2017; 8:16045. [PMID: 28685751 PMCID: PMC5504348 DOI: 10.1038/ncomms16045] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 05/23/2017] [Indexed: 12/21/2022] Open
Abstract
Control over morphology and crystallinity of metal halide perovskite films is of key importance to enable high-performance optoelectronics. However, this remains particularly challenging for solution-printed devices due to the complex crystallization kinetics of semiconductor materials within dynamic flow of inks. Here we report a simple yet effective meniscus-assisted solution printing (MASP) strategy to yield large-grained dense perovskite film with good crystallization and preferred orientation. Intriguingly, the outward convective flow triggered by fast solvent evaporation at the edge of the meniscus ink imparts the transport of perovskite solutes, thus facilitating the growth of micrometre-scale perovskite grains. The growth kinetics of perovskite crystals is scrutinized by in situ optical microscopy tracking to understand the crystallization mechanism. The perovskite films produced by MASP exhibit excellent optoelectronic properties with efficiencies approaching 20% in planar perovskite solar cells. This robust MASP strategy may in principle be easily extended to craft other solution-printed perovskite-based optoelectronics.
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Affiliation(s)
- Ming He
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Bo Li
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Xun Cui
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Beibei Jiang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Yanjie He
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Yihuang Chen
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Daniel O’Neil
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Paul Szymanski
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Mostafa A. EI-Sayed
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Jinsong Huang
- Department of Mechanical and Materials Engineering, University of Nebraska–Lincoln, Lincoln, Nebraska 68588, USA
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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167
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Huang Z, Liu K, Feng Y, Zhou J, Zhang X. Bio-inspired intelligent evaporation modulation in a thermo-sensitive nanogel colloid solution for self-thermoregulation. Phys Chem Chem Phys 2017. [PMID: 28621365 DOI: 10.1039/c7cp03137h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Intelligent evaporation and temperature modulation plays an important role in self-regulation of living organisms and many industrial applications. Here we demonstrate that a poly(N-isopropylacrylamide) (PNIPAM) nanogel colloid solution can spontaneously and intelligently modulate its evaporation rate with temperature variation, which has a larger evaporation rate than distilled water at a temperature higher than its lower critical solution temperature (LCST) and a smaller evaporation rate at a temperature lower than its LCST. It performs just like human skin. Theoretical analysis based on the thermodynamic derivation reveals that the evaporation rate transition around the LCST may originate from the saturated vapor pressure transition caused by the status transformation of the PNIPAM additives. An intelligent thermoregulation system based on the PNIPAM colloid solution is also demonstrated, illustrating its potential for intelligent temperature control and acting as an artificial skin.
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Affiliation(s)
- Zhi Huang
- School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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168
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Zhao M, Yong X. Modeling Evaporation and Particle Assembly in Colloidal Droplets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5734-5744. [PMID: 28548503 DOI: 10.1021/acs.langmuir.7b00284] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Evaporation-induced assembly of nanoparticles in a drying droplet is of great importance in many engineering applications, including printing, coating, and thin film processing. The investigation of particle dynamics in evaporating droplets can provide fundamental hydrodynamic insight for revealing the processing-structure relationship in the particle self-organization induced by solvent evaporation. We develop a free-energy-based multiphase lattice Boltzmann method coupled with Brownian dynamics to simulate evaporating colloidal droplets on solid substrates with specified wetting properties. The influence of interface-bound nanoparticles on the surface tension and evaporation of a flat liquid-vapor interface is first quantified. The results indicate that the particles at the interface reduce surface tension and enhance evaporation flux. For evaporating particle-covered droplets on substrates with different wetting properties, we characterize the increase of evaporate rate via measuring droplet volume. We find that droplet evaporation is determined by the number density and circumferential distribution of interfacial particles. We further correlate particle dynamics and assembly to the evaporation-induced convection in the bulk and on the surface of droplet. Finally, we observe distinct final deposits from evaporating colloidal droplets with bulk-dispersed and interface-bound particles. In addition, the deposit pattern is also influenced by the equilibrium contact angle of droplet.
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Affiliation(s)
- Mingfei Zhao
- Department of Mechanical Engineering, Binghamton University , Binghamton, New York 13902, United States
| | - Xin Yong
- Department of Mechanical Engineering, Binghamton University , Binghamton, New York 13902, United States
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169
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Jones AR, Kim CB, Zhou SX, Ha H, Katsumata R, Blachut G, Bonnecaze RT, Ellison CJ. Generating Large Thermally Stable Marangoni-Driven Topography in Polymer Films by Stabilizing the Surface Energy Gradient. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Amanda R. Jones
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Stop C0400, Austin, Texas 78712, United States
| | - Chae Bin Kim
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Stop C0400, Austin, Texas 78712, United States
| | - Sunshine X. Zhou
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Stop C0400, Austin, Texas 78712, United States
| | - Heonjoo Ha
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Stop C0400, Austin, Texas 78712, United States
| | - Reika Katsumata
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Stop C0400, Austin, Texas 78712, United States
| | - Gregory Blachut
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Stop C0400, Austin, Texas 78712, United States
| | - Roger T. Bonnecaze
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Stop C0400, Austin, Texas 78712, United States
| | - Christopher J. Ellison
- Department
of Chemical Engineering and Materials Science, The University of Minnesota—Twin Cities, 421 Washington Ave SE Rm 151, Minneapolis, Minnesota 55455, United States
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170
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Cho S, Kang S, Pandya A, Shanker R, Khan Z, Lee Y, Park J, Craig SL, Ko H. Large-Area Cross-Aligned Silver Nanowire Electrodes for Flexible, Transparent, and Force-Sensitive Mechanochromic Touch Screens. ACS NANO 2017; 11:4346-4357. [PMID: 28397485 DOI: 10.1021/acsnano.7b01714] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Silver nanowire (AgNW) networks are considered to be promising structures for use as flexible transparent electrodes for various optoelectronic devices. One important application of AgNW transparent electrodes is the flexible touch screens. However, the performances of flexible touch screens are still limited by the large surface roughness and low electrical to optical conductivity ratio of random network AgNW electrodes. In addition, although the perception of writing force on the touch screen enables a variety of different functions, the current technology still relies on the complicated capacitive force touch sensors. This paper demonstrates a simple and high-throughput bar-coating assembly technique for the fabrication of large-area (>20 × 20 cm2), highly cross-aligned AgNW networks for transparent electrodes with the sheet resistance of 21.0 Ω sq-1 at 95.0% of optical transmittance, which compares favorably with that of random AgNW networks (sheet resistance of 21.0 Ω sq-1 at 90.4% of optical transmittance). As a proof of concept demonstration, we fabricate flexible, transparent, and force-sensitive touch screens using cross-aligned AgNW electrodes integrated with mechanochromic spiropyran-polydimethylsiloxane composite film. Our force-sensitive touch screens enable the precise monitoring of dynamic writings, tracing and drawing of underneath pictures, and perception of handwriting patterns with locally different writing forces. The suggested technique provides a robust and powerful platform for the controllable assembly of nanowires beyond the scale of conventional fabrication techniques, which can find diverse applications in multifunctional flexible electronic and optoelectronic devices.
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Affiliation(s)
- Seungse Cho
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Saewon Kang
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Ashish Pandya
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Ravi Shanker
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Ziyauddin Khan
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Youngsu Lee
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Jonghwa Park
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Stephen L Craig
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Hyunhyub Ko
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
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171
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Li W, Lan D, Wang Y. Dewetting-mediated pattern formation inside the coffee ring. Phys Rev E 2017; 95:042607. [PMID: 28505731 DOI: 10.1103/physreve.95.042607] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Indexed: 06/07/2023]
Abstract
The rearrangement of particles in the final stage of droplet evaporation has been investigated by utilizing differential interference contrast microscopy and the formation mechanism of a network pattern inside a coffee ring has been revealed. A tailored substrate with a circular hydrophilic domain is prepared to obtain thin liquid film containing monolayer particles. Real-time bottom-view images show that the evolution of a dry patch could be divided into three stages: rupture initiation, dry patch expansion, and drying of the residual liquid. A growing number of dry patches will repeat these stages to form the network patterns inside the ringlike stain. It can be shown that the suction effect promotes the rupture of the liquid film and the formation of the dry patch. The particle-assembling process is totally controlled by the liquid film dewetting and dominated by the surface tension of the liquid film, which eventually determine the ultimate deposition patterns.
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Affiliation(s)
- Weibin Li
- National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China and School of Engineering Sciences, University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Ding Lan
- National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China and School of Engineering Sciences, University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Yuren Wang
- National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China and School of Engineering Sciences, University of Chinese Academy of Sciences, 100049 Beijing, China
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172
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Liu M, Huo Z, Liu T, Shen Y, He R, Zhou C. Self-Assembling Halloysite Nanotubes into Concentric Ring Patterns in a Sphere-on-Flat Geometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3088-3098. [PMID: 28025883 DOI: 10.1021/acs.langmuir.6b04460] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Highly ordered and concentric ring patterns consisting of halloysite nanotubes (HNTs) with hierarchical cholesteric architectures are prepared by evaporation-induced self-assembly in a sphere-on-flat geometry. The structure and properties of HNTs are investigated. HNTs show a perfect tubular morphology on the nanoscale with high dispersion stability in water. Upon drying the HNTs aqueous suspension in a sphere-on-flat confined space, regular concentric HNTs rings are formed on the substrate via a self-assembly process. The widths of the inner and outer rings and the spacing between the adjacent rings increase with an increase in the concentration of the HNTs suspension. The highly ordered and concentric HNTs rings show a pronounced Maltese cross-like pattern under crossed polarizers, which suggests the formation of hierarchical cholesteric architectures. Scanning electron microscopy and atomic force microscopy observations show a disclination alignment of HNTs in the ring strips, especially with a high concentration of the HNTs suspension. The patterned rough surfaces of the HNTs show low cytotoxicity and can be used as a cell-supporting scaffold. The HNTs rings can guide the growth and orientation of C2C12 myoblast cells perpendicular to the rings. This work provides a simple, repeatable, mild, and high-efficiency method for obtaining HNTs with hierarchical architectures, which show potential for a large variety of applications, for example, in vascular grafts and skin regeneration.
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Affiliation(s)
- Mingxian Liu
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Zhuohao Huo
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Tengfei Liu
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Yan Shen
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Rui He
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Changren Zhou
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
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173
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Lone S, Zhang JM, Vakarelski IU, Li EQ, Thoroddsen ST. Evaporative Lithography in Open Microfluidic Channel Networks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2861-2871. [PMID: 28233500 DOI: 10.1021/acs.langmuir.6b03304] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate a direct capillary-driven method based on wetting and evaporation of various suspensions to fabricate regular two-dimensional wires in an open microfluidic channel through continuous deposition of micro- or nanoparticles under evaporative lithography, akin to the coffee-ring effect. The suspension is gently placed in a loading reservoir connected to the main open microchannel groove on a PDMS substrate. Hydrophilic conditions ensure rapid spreading of the suspension from the loading reservoir to fill the entire channel length. Evaporation during the spreading and after the channel is full increases the particle concentration toward the end of the channel. This evaporation-induced convective transport brings particles from the loading reservoir toward the channel end where this flow deposits a continuous multilayered particle structure. The particle deposition front propagates backward over the entire channel length. The final dry deposit of the particles is thereby much thicker than the initial volume fraction of the suspension. The deposition depth is characterized using a 3D imaging profiler, whereas the deposition topography is revealed using a scanning electron microscope. The patterning technology described here is robust and passive and hence operates without an external field. This work may well become a launching pad to construct low-cost and large-scale thin optoelectronic films with variable thicknesses and interspacing distances.
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Affiliation(s)
- Saifullah Lone
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Jia Ming Zhang
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Ivan U Vakarelski
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Er Qiang Li
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Sigurdur T Thoroddsen
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
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174
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He R, Liu M, Shen Y, Long Z, Zhou C. Large-area assembly of halloysite nanotubes for enhancing the capture of tumor cells. J Mater Chem B 2017; 5:1712-1723. [PMID: 32263912 DOI: 10.1039/c6tb02538b] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Here, polystyrene sulfonate sodium (PSS) modified Halloysite nanotubes (HNTs) were self-assembled into a patterned coating on a glass substrate with ordered nanotube arrays in a slit-like confined space. The microstructure of the formed patterned HNTs coating was investigated. The formed strips are more regular and almost parallel to each other with an increase in HNTs concentration. The HNTs coating formed from the 2% PSS-HNTs dispersion has the maximum nanotube alignment degree. The patterned HNTs coating was employed to capture tumor cells. The tumor cells can be captured by the HNTs coating effectively compared with a smooth glass surface due to the enhanced topographic interactions between the HNTs coating and cancer cells. The HNTs coating prepared from the 2% PSS-HNTs dispersion has the highest capture yield which is due to the ordered nanotube arrangement and the appropriate surface roughness. The HNTs coating was further conjugated with anti-EpCAM, which leads to the capture yield of MCF-7 cells reaching 92% within 3 h. The HNTs coating can capture 8 MCF-7 cells from 1 mL artificial blood samples spiked with 10 MCF-7 cells, showing the promising applications of HNTs in clinical circulating tumor cell capture for early diagnosis and monitoring of cancer patients.
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Affiliation(s)
- Rui He
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
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175
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Hessling D, Xie Q, Harting J. Diffusion dominated evaporation in multicomponent lattice Boltzmann simulations. J Chem Phys 2017; 146:054111. [DOI: 10.1063/1.4975024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Dennis Hessling
- Materials Innovations Institute (M2i), Elektronicaweg 25, 2628 XG Delft, The Netherlands
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600MB Eindhoven, The Netherlands
| | - Qingguang Xie
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600MB Eindhoven, The Netherlands
| | - Jens Harting
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600MB Eindhoven, The Netherlands
- Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Fürther Straße 248, 90429 Nürnberg, Germany
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176
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Lee WC, Kim BH, Choi S, Takeuchi S, Park J. Liquid Cell Electron Microscopy of Nanoparticle Self-Assembly Driven by Solvent Drying. J Phys Chem Lett 2017; 8:647-654. [PMID: 28094948 DOI: 10.1021/acs.jpclett.6b02859] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Drying a colloidal solution of nanoparticles is a versatile method to construct self-assembled structures of nanoparticles. However, mechanistic understanding has mostly relied on empirical knowledge obtained from the final structures of self-assembly as relevant processes during solvent drying are likely kinetic and far from equilibrium. Here, we present in situ TEM studies of nanoparticle self-assembly under various conditions, including the concentrations of the initial solution and the types of nanoparticles and substrates. The capability of tracking trajectories of individual nanoparticles enables us to understand the mechanisms of drying-mediated self-assembly at the single-nanoparticle level. Our results consistently show that a solvent boundary primarily affects nanoparticle motions and the resulting self-assembly processes regardless of different conditions. The solvent boundary drives nanoparticles to form two-dimensional assembly mainly through two pathways, transporting scattered nanoparticles by lateral dragging and flattening aggregated nanoparticles by vertical pressing.
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Affiliation(s)
- Won Chul Lee
- Department of Mechanical Engineering, Hanyang University , Ansan, Gyeonggi 15588, Republic of Korea
- Institute of Industrial Science, The University of Tokyo , Tokyo 153-8505, Japan
- ERATO Takeuchi Biohybrid Innovation Project, Japan Science and Technology Agency , Tokyo 153-8904, Japan
| | - Byung Hyo Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Sun Choi
- Center for Urban Energy Research, Korea Institutes of Science and Technology , Seoul 02792, Republic of Korea
| | - Shoji Takeuchi
- Institute of Industrial Science, The University of Tokyo , Tokyo 153-8505, Japan
- ERATO Takeuchi Biohybrid Innovation Project, Japan Science and Technology Agency , Tokyo 153-8904, Japan
| | - Jungwon Park
- Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
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177
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Hennessy MG, Ferretti GL, Cabral JT, Matar OK. A minimal model for solvent evaporation and absorption in thin films. J Colloid Interface Sci 2017; 488:61-71. [DOI: 10.1016/j.jcis.2016.10.074] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 10/25/2016] [Accepted: 10/25/2016] [Indexed: 10/20/2022]
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178
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Xu G, Hong W, Sun W, Wang T, Tong Z. Effect of Salt Concentration on the Motion of Particles near the Substrate in Drying Sessile Colloidal Droplets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:685-695. [PMID: 28045270 DOI: 10.1021/acs.langmuir.6b03899] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The motions of the particles on the substrate of a drying sessile colloidal droplet of water were measured using multiparticle tracking. Droplets with different concentrations (0-250 mM) of sodium chloride (NaCl) were compared. Several statistical quantities were proposed to characterize the heterogeneous behaviors of the particles and distinguish the effects of the flow field and the substrate interaction. For the salt-free droplet, most of the particles were nonadsorbed and mobile without friction. With the presence of salt, the fraction of the adsorbed particles increases with increasing evaporation time and the initial salt concentration, which was explained by Derjaguin-Landau-Verwey-Overbeek interaction. The fraction of mobile particles is mostly frictionless for all samples. At low salt concentrations, the velocity of mobile particles increases with the evaporation time to a peak and then decreases. The velocity is lower for higher salt concentrations. The effect of salt on the nonadsorbed particles was attributed to the electrokinetic effect.
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Affiliation(s)
- Guozhi Xu
- Research Institute of Materials Science, ‡State Key Laboratory of Luminescent Materials and Devices, and §State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou 510640, China
| | - Wei Hong
- Research Institute of Materials Science, ‡State Key Laboratory of Luminescent Materials and Devices, and §State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou 510640, China
| | - Weixiang Sun
- Research Institute of Materials Science, ‡State Key Laboratory of Luminescent Materials and Devices, and §State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou 510640, China
| | - Tao Wang
- Research Institute of Materials Science, ‡State Key Laboratory of Luminescent Materials and Devices, and §State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou 510640, China
| | - Zhen Tong
- Research Institute of Materials Science, ‡State Key Laboratory of Luminescent Materials and Devices, and §State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou 510640, China
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179
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Abstract
The unusual formation of particle stripes is observed in evaporating polymer drops containing mixtures of microspheres and nanoparticles. Concentric rings are obtained when capillary shear and Marangoni flows are balanced at low evaporation rates.
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Affiliation(s)
- Chongfeng Zhang
- Department of Chemical Engineering & Materials Science
- Stevens Institute of Technology
- Hoboken
- USA
| | - Pinar Akcora
- Department of Chemical Engineering & Materials Science
- Stevens Institute of Technology
- Hoboken
- USA
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180
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Doumenc F, Salmon JB, Guerrier B. Modeling Flow Coating of Colloidal Dispersions in the Evaporative Regime: Prediction of Deposit Thickness. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13657-13668. [PMID: 27966979 DOI: 10.1021/acs.langmuir.6b02282] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We investigate flow coating processes, i.e., the formation of dry coatings starting from dilute complex fluids confined between a static blade and a moving substrate. In particular, we focus on the evaporative regime encountered at low substrate velocity, at which the coating flow is driven mainly by solvent evaporation in the liquid meniscus. In this regime, general arguments based on mass conservation show that the thickness of the dry film decreases as the substrate velocity increases, unlike the behavior in the well-known Landau-Levich regime. This work focuses on colloidal dispersions, which deserve special attention. Indeed, flow coating is expected to draw first a solvent-saturated film of densely packed colloids, which further dries fully when air invades the pores of the solid film. We first develop a model based on the transport equations for binary mixtures, which can describe this phenomenon continuously, using appropriate boundary conditions and a criterion to take into account pore-emptying in the colloidal film. Extensive numerical simulations of the model then demonstrate two regimes for the deposit thickness as a function of the process parameters (substrate velocity, evaporation rate, bulk concentration, and particle size). We finally derive an analytical model based on simplified transport equations that can reproduce the output of our numerical simulations very well. This model can predict analytically the two observed asymptotic regimes and therefore unifies the models recently reported in the literature.
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Affiliation(s)
- Frédéric Doumenc
- Laboratoire FAST, Université Paris-Sud, CNRS, Université Paris-Saclay , F-91405 Orsay, France
- Sorbonne Universités , UPMC Université Paris 06, UFR 919, 75005 Paris, France
| | | | - Béatrice Guerrier
- Laboratoire FAST, Université Paris-Sud, CNRS, Université Paris-Saclay , F-91405 Orsay, France
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181
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Qin L, Zhao Y, Liu J, Hou J, Zhang Y, Wang J, Zhu J, Zhang B, Lvov Y, Van der Bruggen B. Oriented Clay Nanotube Membrane Assembled on Microporous Polymeric Substrates. ACS APPLIED MATERIALS & INTERFACES 2016; 8:34914-34923. [PMID: 27936539 DOI: 10.1021/acsami.6b12858] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Organized arrays of halloysite clay nanotubes have great potential in molecular separation, absorption, and biomedical applications. A highly oriented layer of halloysite on polyacrylonitrile porous membrane was prepared via a facile evaporation-induced method. Scanning electronic microscopy, surface attenuated total reflection Fourier transform infrared spectroscopy, and energy dispersive X-ray spectroscopy mapping indicated formation of the nanoarchitecture-controlled membrane. The well-ordered nanotube coating allowed for the excellent dye rejection (97.7% for reactive black 5) with high salt permeation (86.5% for aqueous NaCl), and thus these membranes were suitable for dye purification or concentration. These well-aligned nanotubes' composite membranes also showed very good fouling resistance against dye accumulation and bovine serum albumin adsorption as compared to the pristine polyacrylonitrile or membrane coated with disordered halloysite layer.
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Affiliation(s)
- Lijuan Qin
- School of Chemical Engineering and Energy, Zhengzhou University , Zhengzhou 450001, China
| | - Yafei Zhao
- School of Chemical Engineering and Energy, Zhengzhou University , Zhengzhou 450001, China
| | - Jindun Liu
- School of Chemical Engineering and Energy, Zhengzhou University , Zhengzhou 450001, China
| | - Jingwei Hou
- UNESCO Centre for Membrane Science and Technology, University of New South Wales , Sydney, Australia
| | - Yatao Zhang
- School of Chemical Engineering and Energy, Zhengzhou University , Zhengzhou 450001, China
| | - Jing Wang
- School of Chemical Engineering and Energy, Zhengzhou University , Zhengzhou 450001, China
- Department of Chemical Engineering, KU Leuven , Heverlee, Belgium
| | - Junyong Zhu
- Department of Chemical Engineering, KU Leuven , Heverlee, Belgium
| | - Bing Zhang
- School of Chemical Engineering and Energy, Zhengzhou University , Zhengzhou 450001, China
| | - Yuri Lvov
- Institute for Micromanufacturing, Louisiana Tech University , Ruston, Louisiana 71270, United States
- I. Gubkin Russian State University of Oil and Gas , Moscow 119991, Russia
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182
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Yong X. Hydrodynamic Interactions and Entanglements of Polymer Solutions in Many-Body Dissipative Particle Dynamics. Polymers (Basel) 2016; 8:polym8120426. [PMID: 30974702 PMCID: PMC6431898 DOI: 10.3390/polym8120426] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 12/05/2016] [Accepted: 12/06/2016] [Indexed: 11/16/2022] Open
Abstract
Using many-body dissipative particle dynamics (MDPD), polymer solutions with concentrations spanning dilute and semidilute regimes are modeled. The parameterization of MDPD interactions for systems with liquid⁻vapor coexistence is established by mapping to the mean-field Flory⁻Huggins theory. The characterization of static and dynamic properties of polymer chains is focused on the effects of hydrodynamic interactions and entanglements. The coil⁻globule transition of polymer chains in dilute solutions is probed by varying solvent quality and measuring the radius of gyration and end-to-end distance. Both static and dynamic scaling relations for polymer chains in poor, theta, and good solvents are in good agreement with the Zimm theory with hydrodynamic interactions considered. Semidilute solutions with polymer volume fractions up to 0.7 exhibit the screening of excluded volume interactions and subsequent shrinking of polymer coils. Furthermore, entanglements become dominant in the semidilute solutions, which inhibit diffusion and relaxation of chains. Quantitative analysis of topology violation confirms that entanglements are correctly captured in the MDPD simulations.
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Affiliation(s)
- Xin Yong
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, NY 13902, USA.
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183
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Jafari Kang S, Vandadi V, Felske JD, Masoud H. Alternative mechanism for coffee-ring deposition based on active role of free surface. Phys Rev E 2016; 94:063104. [PMID: 28085318 DOI: 10.1103/physreve.94.063104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Indexed: 05/12/2023]
Abstract
When a colloidal sessile droplet dries on a substrate, the particles suspended in it usually deposit in a ringlike pattern. This phenomenon is commonly referred to as the "coffee-ring" effect. One paradigm for why this occurs is as a consequence of the solutes being transported towards the pinned contact line by the flow inside the drop, which is induced by surface evaporation. From this perspective, the role of the liquid-gas interface in shaping the deposition pattern is somewhat minimized. Here, we propose an alternative mechanism for the coffee-ring deposition. It is based on the bulk flow within the drop transporting particles to the interface where they are captured by the receding free surface and subsequently transported along the interface until they are deposited near the contact line. That the interface captures the solutes as the evaporation proceeds is supported by a Lagrangian tracing of particles advected by the flow field within the droplet. We model the interfacial adsorption and transport of particles as a one-dimensional advection-generation process in toroidal coordinates and show that the theory reproduces ring-shaped depositions. Using this model, deposition patterns on both hydrophilic and hydrophobic surfaces are examined in which the evaporation is modeled as being either diffusive or uniform over the surface.
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Affiliation(s)
- Saeed Jafari Kang
- Department of Mechanical Engineering, University of Nevada, Reno, Nevada 89557, USA
| | - Vahid Vandadi
- Department of Mechanical Engineering, University of Nevada, Reno, Nevada 89557, USA
| | - James D Felske
- Department of Mechanical and Aerospace Engineering, State University of New York, Buffalo, New York 14260, USA
| | - Hassan Masoud
- Department of Mechanical Engineering, University of Nevada, Reno, Nevada 89557, USA
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184
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Armao JJ, Lehn JM. Adaptive Chemical Networks under Non-Equilibrium Conditions: The Evaporating Droplet. Angew Chem Int Ed Engl 2016; 55:13450-13454. [DOI: 10.1002/anie.201606546] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/01/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Joseph J. Armao
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS); Université de Strasbourg; 8 allée Gaspard Monge Strasbourg 67000 France
| | - Jean-Marie Lehn
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS); Université de Strasbourg; 8 allée Gaspard Monge Strasbourg 67000 France
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185
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Armao JJ, Lehn JM. Adaptive Chemical Networks under Non-Equilibrium Conditions: The Evaporating Droplet. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606546] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Joseph J. Armao
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS); Université de Strasbourg; 8 allée Gaspard Monge Strasbourg 67000 France
| | - Jean-Marie Lehn
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS); Université de Strasbourg; 8 allée Gaspard Monge Strasbourg 67000 France
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186
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187
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Bae DG, Jeong JE, Kang SH, Byun M, Han DW, Lin Z, Woo HY, Hong SW. A Nonconventional Approach to Patterned Nanoarrays of DNA Strands for Template-Assisted Assembly of Polyfluorene Nanowires. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:4254-4263. [PMID: 27351291 DOI: 10.1002/smll.201601346] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 05/24/2016] [Indexed: 06/06/2023]
Abstract
DNA molecules have been widely recognized as promising building blocks for constructing functional nanostructures with two main features, that is, self-assembly and rich chemical functionality. The intrinsic feature size of DNA makes it attractive for creating versatile nanostructures. Moreover, the ease of access to tune the surface of DNA by chemical functionalization offers numerous opportunities for many applications. Herein, a simple yet robust strategy is developed to yield the self-assembly of DNA by exploiting controlled evaporative assembly of DNA solution in a unique confined geometry. Intriguingly, depending on the concentration of DNA solution, highly aligned nanostructured fibrillar-like arrays and well-positioned concentric ring-like superstructures composed of DNAs are formed. Subsequently, the ring-like negatively charged DNA superstructures are employed as template to produce conductive organic nanowires on a silicon substrate by complexing with a positively charged conjugated polyelectrolyte poly[9,9-bis(6'-N,N,N-trimethylammoniumhexyl)fluorene dibromide] (PF2) through the strong electrostatic interaction. Finally, a monolithic integration of aligned arrays of DNA-templated PF2 nanowires to yield two DNA/PF2-based devices is demonstrated. It is envisioned that this strategy can be readily extended to pattern other biomolecules and may render a broad range of potential applications from the nucleotide sequence and hybridization as recognition events to transducing elements in chemical sensors.
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Affiliation(s)
- Dong Geun Bae
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 609-735, Republic of Korea
| | - Ji-Eun Jeong
- Department of Chemistry, Korea University, Seoul, 136-713, Republic of Korea
| | - Seok Hee Kang
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 609-735, Republic of Korea
| | - Myunghwan Byun
- Department of Advanced Materials Engineering, Keimyung University, Daegu, 704-701, Republic of Korea
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 609-735, Republic of Korea
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Han Young Woo
- Department of Chemistry, Korea University, Seoul, 136-713, Republic of Korea
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 609-735, Republic of Korea
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188
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Karapetsas G, Chandra Sahu K, Matar OK. Evaporation of Sessile Droplets Laden with Particles and Insoluble Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6871-81. [PMID: 27300638 DOI: 10.1021/acs.langmuir.6b01042] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We consider the flow dynamics of a thin evaporating droplet in the presence of an insoluble surfactant and noninteracting particles in the bulk. On the basis of lubrication theory, we derive a set of evolution equations for the film height, the interfacial surfactant, and bulk particle concentrations, taking into account the dependence of liquid viscosity on the local particle concentration. An important ingredient of our model is that it takes into account the fact that the surfactant adsorbed at the interface hinders evaporation. We perform a parametric study to investigate how the presence of surfactants affects the evaporation process as well as the flow dynamics with and without the presence of particles in the bulk. Our numerical calculations show that the droplet lifetime is affected significantly by the balance between the ability of the surfactant to enhance spreading, suppressing the effect of thermal Marangoni stresses-induced motion, and to hinder the evaporation flux through the reduction of the effective interfacial area of evaporation, which tend to accelerate and decelerate the evaporation process, respectively. For particle-laden droplets and in the case of dilute solutions, the droplet lifetime is found to be weakly dependent on the initial particle concentration. We also show that the particle deposition patterns are influenced strongly by the direct effect of the surfactant on the evaporative flux; in certain cases, the "coffee-stain" effect is enhanced significantly. A discussion of the delicate interplay between the effects of capillary pressure and solutal and thermal Marangoni stresses, which drive the liquid flow inside of the evaporating droplet giving rise to the observed results, is provided herein.
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Affiliation(s)
- George Karapetsas
- Department of Chemical Engineering, University of Patras , Patras 26500, Greece
| | - Kirti Chandra Sahu
- Department of Chemical Engineering, Indian Institute of Technology Hyderabad , Sangareddy 502 285, Telangana, India
| | - Omar K Matar
- Department of Chemical Engineering, Imperial College London , London SW7 2AZ, U.K
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189
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Tong L, Qi W, Wang M, Huang R, Su R, He Z. Tunable Design of Structural Colors Produced by Pseudo-1D Photonic Crystals of Graphene Oxide. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:3433-3443. [PMID: 27171200 DOI: 10.1002/smll.201600148] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 04/08/2016] [Indexed: 06/05/2023]
Abstract
It is broadly observed that graphene oxide (GO) films appear transparent with a thickness of about several nanometers, whereas they appear dark brown or almost black with thickness of more than 1 μm. The basic color mechanism of GO film on a sub-micrometer scale, however, is not well understood. This study reports on GO pseudo-1D photonic crystals (p1D-PhCs) exhibiting tunable structural colors in the visible wavelength range owing to its 1D Bragg nanostructures. Striking structural colors of GO p1D-PhCs could be tuned by simply changing either the volume or concentration of the aqueous GO dispersion during vacuum filtration. Moreover, the quantitative relationship between thickness and reflection wavelength of GO p1D-PhCs has been revealed, thereby providing a theoretical basis to rationally design structural colors of GO p1D-PhCs. The spectral response of GO p1D-PhCs to humidity is also obtained clearly showing the wavelength shift of GO p1D-PhCs at differently relative humidity values and thus encouraging the integration of structural color printing and the humidity-responsive property of GO p1D-PhCs to develop a visible and fast-responsive anti-counterfeiting label. The results pave the way for a variety of potential applications of GO in optics, structural color printing, sensing, and anti-counterfeiting.
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Affiliation(s)
- Liping Tong
- State Key Laboratory of Chemical Engineering, School of Life Sciences, Tianjin University, Tianjin, 300072, P. R. China
| | - Wei Qi
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Mengfan Wang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Renliang Huang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Rongxin Su
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Zhimin He
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
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190
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Zigelman A, Manor O. A model for pattern deposition from an evaporating solution subject to contact angle hysteresis and finite solubility. SOFT MATTER 2016; 12:5693-5707. [PMID: 27279348 DOI: 10.1039/c6sm00579a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We propose a model for the pattern deposition of the solute from an evaporating drop of a dilute solution on a horizontal substrate. In the model we take into account the three-phase contact angle hysteresis and the deposition of the solute whenever its concentration exceeds the solubility limit. The evaporating drop is governed by a film equation. We show that unless for a very small three-phase contact angle or a very rapid evaporation rate the film adopts a quasi-steady geometry, satisfying the Young-Laplace equation to leading order. The concentration profile is assumed to satisfy an advection diffusion equation subject to the standard Fick's law for the diffusive flux. We further use an integral boundary condition to describe the dynamics of the concentration in the vicinity of the three-phase contact line; we replace an exact geometric description of the vicinity of the contact line, which is usually assumed such that mathematical singularities are avoided, with general insights about the concentration and its flux. We use our model to explore the relationships between a variety of deposition patterns and the governing parameters, show that the model repeats previous findings, and suggest further insights.
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Affiliation(s)
- Anna Zigelman
- Wolfson Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa, Israel 32000.
| | - Ofer Manor
- Wolfson Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa, Israel 32000.
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191
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Persad AH, Ward CA. Expressions for the Evaporation and Condensation Coefficients in the Hertz-Knudsen Relation. Chem Rev 2016; 116:7727-67. [DOI: 10.1021/acs.chemrev.5b00511] [Citation(s) in RCA: 203] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aaron H. Persad
- Department
of Mechanical
and Industrial Engineering, Thermodynamics and Kinetics Laboratory, University of Toronto, 5 King’s College Road, Toronto, Canada M5S 3G8
| | - Charles A. Ward
- Department
of Mechanical
and Industrial Engineering, Thermodynamics and Kinetics Laboratory, University of Toronto, 5 King’s College Road, Toronto, Canada M5S 3G8
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192
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Watanabe M, Nishino T. Spontaneous formation of discrete arrangement of particles by dipping ultraviolet/ozone-treated poly(dimethylsiloxane) substrate in solution. J Appl Polym Sci 2016. [DOI: 10.1002/app.43506] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Masashi Watanabe
- Faculty of Textile Science and Tìhnology; Shinshu University; 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Toshihiro Nishino
- Faculty of Textile Science and Tìhnology; Shinshu University; 3-15-1 Tokida Ueda Nagano 386-8567 Japan
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193
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Development of hydrophobic surface substrates enabling reproducible drop-and-dry spectroscopic measurements. Talanta 2016; 153:31-7. [DOI: 10.1016/j.talanta.2016.02.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 02/21/2016] [Accepted: 02/22/2016] [Indexed: 11/19/2022]
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194
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Ta VD, Carter RM, Esenturk E, Connaughton C, Wasley TJ, Li J, Kay RW, Stringer J, Smith PJ, Shephard JD. Dynamically controlled deposition of colloidal nanoparticle suspension in evaporating drops using laser radiation. SOFT MATTER 2016; 12:4530-6. [PMID: 27094902 DOI: 10.1039/c6sm00465b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Dynamic control of the distribution of polystyrene suspended nanoparticles in evaporating droplets is investigated using a 2.9 μm high power laser. Under laser radiation a droplet is locally heated and fluid flows are induced that overcome the capillary flow, and thus a reversal of the coffee-stain effect is observed. Suspension particles are accumulated in a localised area, one order of magnitude smaller than the original droplet size. By scanning the laser beam over the droplet, particles can be deposited in an arbitrary pattern. This finding raises the possibility for direct laser writing of suspended particles through a liquid layer. Furthermore, a highly uniform coating is possible by manipulating the laser beam diameter and exposure time. The effect is expected to be universally applicable to aqueous solutions independent of solutes (either particles or molecules) and deposited substrates.
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Affiliation(s)
- V D Ta
- Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
| | - R M Carter
- Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
| | - E Esenturk
- Warwick Mathematics Institute, Zeeman Building, University of Warwick, Coventry CV4 7AL, UK and Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - C Connaughton
- Warwick Mathematics Institute, Zeeman Building, University of Warwick, Coventry CV4 7AL, UK and Centre for Complexity Science, Zeeman Building, University of Warwick, Coventry CV4 7AL, UK
| | - T J Wasley
- Additive Manufacturing Research Group, Loughborough University, Leicestershire, LE11 3TU, UK
| | - J Li
- Additive Manufacturing Research Group, Loughborough University, Leicestershire, LE11 3TU, UK
| | - R W Kay
- Additive Manufacturing Research Group, Loughborough University, Leicestershire, LE11 3TU, UK
| | - J Stringer
- Laboratory of Applied Inkjet Printing, Department of Mechanical Engineering, University of Sheffield, Sheffield, S1 4BJ, UK and Department of Mechanical Engineering, The University of Auckland, Auckland 1142, New Zealand
| | - P J Smith
- Laboratory of Applied Inkjet Printing, Department of Mechanical Engineering, University of Sheffield, Sheffield, S1 4BJ, UK
| | - J D Shephard
- Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
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195
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Kuang M, Wu L, Li Y, Gao M, Zhang X, Jiang L, Song Y. Sliding three-phase contact line of printed droplets for single-crystal arrays. NANOTECHNOLOGY 2016; 27:184002. [PMID: 27009400 DOI: 10.1088/0957-4484/27/18/184002] [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
Controlling the behaviours of printed droplets is an essential requirement for inkjet printing of delicate three-dimensional (3D) structures or high-resolution patterns. In this work, molecular deposition and crystallization are regulated by manipulating the three-phase contact line (TCL) behaviour of the printed droplets. The results show that oriented single-crystal arrays are fabricated based on the continuously sliding TCL. Owing to the sliding of the TCL on the substrate, the outward capillary flow within the evaporating droplet is suppressed and the molecules are brought to the centre of the droplet, resulting in the formation of a single crystal. This work provides a facile strategy for controlling the structures of printed units by manipulating the TCL of printed droplets, which is significant for realizing high-resolution patterns and delicate 3D structures.
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Affiliation(s)
- Minxuan Kuang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing 100190, People's Republic of China. Laboratory of Bio-inspired Smart Interface Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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196
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Zhang P, Santoro G, Yu S, Vayalil SK, Bommel S, Roth SV. Manipulating the Assembly of Spray-Deposited Nanocolloids: In Situ Study and Monolayer Film Preparation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4251-4258. [PMID: 27070283 DOI: 10.1021/acs.langmuir.6b00892] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Fabrication of nanoparticle arrays on a substrate is one of the most concerned aspects for manipulating assembly of nanoparticles and preparing functional nanocomposites. Here, we studied in situ the assembly kinetics of polystyrene nanocolloids by using grazing incidence small-angle X-ray scattering. The structure formation of the nanoparticle film is monitored during air-brush spraying, which provides a rapid and scalable preparation. By optimizing the substrate temperature, the dispersion of the nanocolloids can be tailored to prepare monolayer film. The success of the monolayer preparations is attributed to the fast solvent evaporation which inhibits the aggregation of the nanocolloids. The present study may open a new avenue for the manufacture-friendly preparation of well-dispersed nanoparticle thin films.
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Affiliation(s)
- Peng Zhang
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Gonzalo Santoro
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Shun Yu
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Sarathlal K Vayalil
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Sebastian Bommel
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Stephan V Roth
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
- Department of Fiber and Polymer Technology, Royal Institute of Technology , Teknikringen 56-58, SE-10044 Stockholm, Sweden
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197
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Hamon C, Sanz-Ortiz MN, Modin E, Hill EH, Scarabelli L, Chuvilin A, Liz-Marzán LM. Hierarchical organization and molecular diffusion in gold nanorod/silica supercrystal nanocomposites. NANOSCALE 2016; 8:7914-22. [PMID: 26961684 PMCID: PMC5317216 DOI: 10.1039/c6nr00712k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 02/26/2016] [Indexed: 05/27/2023]
Abstract
Hierarchical organization of gold nanorods was previously obtained on a substrate, allowing precise control over the morphology of the assemblies and macroscale spatial arrangement. Herein, a thorough description of these gold nanorod assemblies and their orientation within supercrystals is presented together with a sol-gel technique to protect the supercrystals with mesoporous silica films. The internal organization of the nanorods in the supercrystals was characterized by combining focused ion beam ablation and scanning electron microscopy. A mesoporous silica layer is grown both over the supercrystals and between the individual lamellae of gold nanorods inside the structure. This not only prevented the detachment of the supercrystal from the substrate in water, but also allowed small molecule analytes to infiltrate the structure. These nanocomposite substrates show superior Raman enhancement in comparison with gold supercrystals without silica owing to improved accessibility of the plasmonic hot spots to analytes. The patterned supercrystal arrays with enhanced optical and mechanical properties obtained in this work show potential for the practical implementation of nanostructured devices in spatially resolved ultradetection of biomarkers and other analytes.
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Affiliation(s)
- Cyrille Hamon
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain.
| | - Marta N Sanz-Ortiz
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain.
| | - Evgeny Modin
- Electron Microscopy and Image Processing Interdisciplinary Laboratory, Far Eastern Federal University, Sukhanova 8, 690000, Vladivostok, Russia and Electron Microscopy Laboratory, CIC NanoGUNE Consolider, Tolosa Hiribidea, 76, 20019 Donostia - San Sebastian, Spain
| | - Eric H Hill
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain.
| | - Leonardo Scarabelli
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain.
| | - Andrey Chuvilin
- Electron Microscopy Laboratory, CIC NanoGUNE Consolider, Tolosa Hiribidea, 76, 20019 Donostia - San Sebastian, Spain and Basque Foundation of Science, IKERBASQUE, 48013 Bilbao, Spain
| | - Luis M Liz-Marzán
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain. and Basque Foundation of Science, IKERBASQUE, 48013 Bilbao, Spain and Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, Spain
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198
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Kim H, Boulogne F, Um E, Jacobi I, Button E, Stone HA. Controlled Uniform Coating from the Interplay of Marangoni Flows and Surface-Adsorbed Macromolecules. PHYSICAL REVIEW LETTERS 2016; 116:124501. [PMID: 27058080 DOI: 10.1103/physrevlett.116.124501] [Citation(s) in RCA: 139] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Indexed: 05/27/2023]
Abstract
Surface coatings and patterning technologies are essential for various physicochemical applications. In this Letter, we describe key parameters to achieve uniform particle coatings from binary solutions. First, multiple sequential Marangoni flows, set by solute and surfactant simultaneously, prevent nonuniform particle distributions and continuously mix suspended materials during droplet evaporation. Second, we show the importance of particle-surface interactions that can be established by surface-adsorbed macromolecules. To achieve a uniform deposit in a binary mixture, a small concentration of surfactant and surface-adsorbed polymer (0.05 wt% each) is sufficient, which offers a new physicochemical avenue for control of coatings.
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Affiliation(s)
- Hyoungsoo Kim
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - François Boulogne
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Eujin Um
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Ian Jacobi
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | | | - Howard A Stone
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
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199
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Deng W, Zhang X, Huang L, Xu X, Wang L, Wang J, Shang Q, Lee ST, Jie J. Aligned Single-Crystalline Perovskite Microwire Arrays for High-Performance Flexible Image Sensors with Long-Term Stability. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:2201-8. [PMID: 26780594 DOI: 10.1002/adma.201505126] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Indexed: 05/23/2023]
Abstract
A simple, low-cost blade-coating method is developed for the large-area fabrication of single-crystalline aligned CH3NH3PbI3 microwire (MW) arrays. The solution-coating method is applicable to flexible substrates, enabling the fabrication of MW-array-based photodetectors with excellent long-term stability, flexibility, and bending durability. Integrated devices from such photodetectors demonstrate high performance for high-resolution, flexible image sensors.
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Affiliation(s)
- Wei Deng
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Xiujuan Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Liming Huang
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Xiuzhen Xu
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Liang Wang
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Jincheng Wang
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Qixun Shang
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Shuit-Tong Lee
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Jiansheng Jie
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
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200
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Liu M, He R, Yang J, Zhao W, Zhou C. Stripe-like Clay Nanotubes Patterns in Glass Capillary Tubes for Capture of Tumor Cells. ACS APPLIED MATERIALS & INTERFACES 2016; 8:7709-7719. [PMID: 26967539 DOI: 10.1021/acsami.6b01342] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Here, we used capillary tubes to evaporate an aqueous dispersion of halloysite nanotubes (HNTs) in a controlled manner to prepare a patterned surface with ordered alignment of the nanotubes . Sodium polystyrenesulfonate (PSS) was added to improve the surface charges of the tubes. An increased negative charge of HNTs is realized by PSS coating (from -26.1 mV to -52.2 mV). When the HNTs aqueous dispersion concentration is higher than 10%, liquid crystal phenomenon of the dispersion is found. A typical shear flow behavior and decreased viscosity upon shear is found when HNTs dispersions with concentrations higher than 10%. Upon drying the HNTs aqueous dispersion in capillary tubes, a regular pattern is formed in the wall of the tube. The width and spacing of the bands increase with HNTs dispersion concentration and decrease with the drying temperature for a given initial concentration. Morphology results show that an ordered alignment of HNTs is found especially for the sample of 10%. The patterned surface can be used as a model for preparing PDMS molding with regular micro-/nanostructure. Also, the HNTs rough surfaces can provide much higher tumor cell capture efficiency compared to blank glass surfaces. The HNTs ordered surfaces provide promising application for biomedical areas such as biosensors.
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Affiliation(s)
- Mingxian Liu
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, People's Republic of China
| | - Rui He
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, People's Republic of China
| | - Jing Yang
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, People's Republic of China
| | - Wei Zhao
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, People's Republic of China
| | - Changren Zhou
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, People's Republic of China
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