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Procházka K, Limpouchová Z, Štěpánek M, Šindelka K, Lísal M. DPD Modelling of the Self- and Co-Assembly of Polymers and Polyelectrolytes in Aqueous Media: Impact on Polymer Science. Polymers (Basel) 2022; 14:polym14030404. [PMID: 35160394 PMCID: PMC8838752 DOI: 10.3390/polym14030404] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/17/2022] [Accepted: 01/18/2022] [Indexed: 02/04/2023] Open
Abstract
This review article is addressed to a broad community of polymer scientists. We outline and analyse the fundamentals of the dissipative particle dynamics (DPD) simulation method from the point of view of polymer physics and review the articles on polymer systems published in approximately the last two decades, focusing on their impact on macromolecular science. Special attention is devoted to polymer and polyelectrolyte self- and co-assembly and self-organisation and to the problems connected with the implementation of explicit electrostatics in DPD numerical machinery. Critical analysis of the results of a number of successful DPD studies of complex polymer systems published recently documents the importance and suitability of this coarse-grained method for studying polymer systems.
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Affiliation(s)
- Karel Procházka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague, Czech Republic; (Z.L.); (M.Š.)
- Correspondence:
| | - Zuzana Limpouchová
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague, Czech Republic; (Z.L.); (M.Š.)
| | - Miroslav Štěpánek
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague, Czech Republic; (Z.L.); (M.Š.)
| | - Karel Šindelka
- Department of Molecular and Mesoscopic Modelling, Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 135, 165 02 Prague, Czech Republic; (K.Š.); (M.L.)
| | - Martin Lísal
- Department of Molecular and Mesoscopic Modelling, Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 135, 165 02 Prague, Czech Republic; (K.Š.); (M.L.)
- Department of Physics, Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 3632, 400 96 Ústí n. Labem, Czech Republic
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2
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Simulation study on the effects of the self-assembly of nanoparticles on thermal conductivity of nanofluids. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.139129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Sato T, Kobayashi Y, Arai N. Effect of chemical design of grafted polymers on the self-assembled morphology of polymer-tethered nanoparticles in nanotubes. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:365404. [PMID: 34157689 DOI: 10.1088/1361-648x/ac0d85] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 06/22/2021] [Indexed: 06/13/2023]
Abstract
There is a clear relationship between the self-assembling architecture of nanoparticles (NPs) and their physical properties, and they are currently used in a variety of applications, including optical sensors. Polymer-tethered NPs, which are created by grafting polymers onto NPs to control the self-assembly of NPs, have attracted considerable attention. Recent synthetic techniques have made it possible to synthesize a wide variety of polymers and thereby create NPs with many types of surfaces. However, self-assembled structures have not been systematically classified because of the large number of tuning parameters such as the polymer length and graft density. In this study, by using coarse-grained molecular simulation, we investigated the changes in the self-assembled structure of polymer-tethered NP solutions confined in nanotubes due to the chemical properties of polymers. Three types of tethered polymer NP models were examined: homo hydrophilic, diblock hydrophilic-hydrophobic (HI-HO), and diblock hydrophobic-hydrophilic. Under strong confinement, the NPs were dispersed in single file at low axial pressure. As the pressure increased, multilayered lamellar was observed in the HI-HO model. In contrast, under weak confinement, the difference in the pressure at which the phases emerge, depending on the model, was significant. By changing the chemical properties of the grafted polymer, the thermodynamic conditions (the axial pressure in this study) under which the phases appear is altered, although the coordination of NPs remains almost unchanged. Our simulation offers a theoretical guide for controlling the morphologies of self-assembled polymer-tethered NPs, a novel system that may find applications in nanooptical devices or for nanopatterning.
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Affiliation(s)
- Takumi Sato
- Department of Mechanical Engineering, Keio University, Kohoku-ku, Yokohama, Japan
| | - Yusei Kobayashi
- Department of Mechanical Engineering, Keio University, Kohoku-ku, Yokohama, Japan
| | - Noriyoshi Arai
- Department of Mechanical Engineering, Keio University, Kohoku-ku, Yokohama, Japan
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Zhang X, Fu Q, Duan H, Song J, Yang H. Janus Nanoparticles: From Fabrication to (Bio)Applications. ACS NANO 2021; 15:6147-6191. [PMID: 33739822 DOI: 10.1021/acsnano.1c01146] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Janus nanoparticles (JNPs) refer to the integration of two or more chemically discrepant composites into one structure system. Studies into JNPs have been of significant interest due to their interesting characteristics stemming from their asymmetric structures, which can integrate different functional properties and perform more synergetic functions simultaneously. Herein, we present recent progress of Janus particles, comprehensively detailing fabrication strategies and applications. First, the classification of JNPs is divided into three blocks, consisting of polymeric composites, inorganic composites, and hybrid polymeric/inorganic JNPs composites. Then, the fabrication strategies are alternately summarized, examining self-assembly strategy, phase separation strategy, seed-mediated polymerization, microfluidic preparation strategy, nucleation growth methods, and masking methods. Finally, various intriguing applications of JNPs are presented, including solid surfactants agents, micro/nanomotors, and biomedical applications such as biosensing, controlled drug delivery, bioimaging, cancer therapy, and combined theranostics. Furthermore, challenges and future works in this field are provided.
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Affiliation(s)
- Xuan Zhang
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, P.R. China
| | - Qinrui Fu
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, P.R. China
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457
| | - Jibin Song
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, P.R. China
| | - Huanghao Yang
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, P.R. China
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5
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Sato T, Kobayashi Y, Michioka T, Arai N. Self-assembly of polymer-tethered nanoparticles with uniform and Janus surfaces in nanotubes. SOFT MATTER 2021; 17:4047-4058. [PMID: 33725068 DOI: 10.1039/d1sm00009h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this study, a coarse-grained molecular simulation was performed to investigate the morphologies and phase diagrams of self-assembled polymer-tethered nanoparticles (NPs) confined in nanotubes (NTs). Unlike ordinary NPs, polymer-tethered NPs have two distinct characteristic lengths, which are key factors that determine their self-assembly. Herein, two distinct types of NT walls and three types of polymer-tethered NPs were considered: hydrophilic and hydrophobic walls, and hydrophilic, hydrophobic, and Janus surfaces. First, the qualitative phase diagrams of the axial pressure, Pz, versus the ratio of the NT radius to the NP radius, L, were derived. The results revealed that diverse self-assembled morphologies, which are not formed in non-tethered NPs, were observed in the polymer-tethered NPs. For example, three types of ordered structures with different structural characteristic lengths, depending on Pz, were obtained. In addition, the effect of the chemical nature of the polymer-tethered NP surface on the self-assembled morphology confined in NTs was investigated. Clusters of water molecules were formed, particularly in the hydrophobic polymer-tethered NPs, and these clusters caused the structural distortion of the NP. Moreover, in the polymer-tethered NPs with the Janus amphiphilic surface, the hydrophobic and hydrophilic polymer tethered NPs assembled in the axial direction to form an ordered structure, and a double-helix structure was formed at L = 3.0 in the hydrophobic NT. The results of these simulations indicate that the self-assembly behaviours of polymer-tethered NPs can be qualitatively predicted based on the chemical nature of the NT walls and the surface design of the polymer-tethered NP.
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Affiliation(s)
- Takumi Sato
- Department of Mechanical Engineering, Keio University, Kohoku-ku, Yokohama, Japan.
| | - Yusei Kobayashi
- Department of Mechanical Engineering, Keio University, Kohoku-ku, Yokohama, Japan.
| | - Takenobu Michioka
- Department of Mechanical Engineering, Kindai University, Higashi-Osaka, Osaka, Japan
| | - Noriyoshi Arai
- Department of Mechanical Engineering, Keio University, Kohoku-ku, Yokohama, Japan.
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Tsujinoue H, Nozawa T, Arai N. Cylindrical defect structures formed by chiral nematic liquid crystals in quasi-one-dimensional systems. Phys Chem Chem Phys 2020; 22:16896-16904. [PMID: 32666995 DOI: 10.1039/d0cp01526a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Blue phases are three-dimensional self-assembly structures of liquid crystals with a lattice of line defects. They have attracted considerable interest as photonic materials. It is well known that blue phases occur in cholesteric liquid crystals (CLCs) under certain thermodynamic conditions; however, recent studies have indicated that confining surfaces may induce distinctive structural changes. For example, in a previous study, a quasi-two-dimensional (Q2D) confinement system was investigated with the aid of numerical calculations, and a stable Q2D Skyrmion structure was attained. Here, we performed molecular simulations to investigate the CLC phase behavior at the molecular scale for a quasi-one-dimensional (Q1D) nanotube system. Various morphological behaviors of CLCs were observed by changing the temperature and the radius of the nanotubes. In particular, we discovered a self-assembled structure with cylindrical (or ring-like) defects rather than lines by introducing a novel local orientation analysis. Our simulation results show that the self-assembly of CLCs offers a guide to control the intensity in Q1D systems and fundamental knowledge for their application to optical devices.
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Affiliation(s)
- Hiroaki Tsujinoue
- Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan.
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Paiva FL, Hore MJA, Secchi A, Calado V, Maia J, Khani S. Dynamic Interfacial Trapping of Janus Nanorod Aggregates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4184-4193. [PMID: 32200633 DOI: 10.1021/acs.langmuir.9b03604] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Taking advantage of both shape and chemical anisotropy on the same nanoparticle offers rich self-assembly possibilities for nanotechnology. Through dissipative particle dynamics calculations, in the present work, the directed assembly of Janus nanorod aggregates and their capability to assemble into metastable novel structures at an interfacial level have been assessed. Symmetric Janus rods become kinetically trapped and exhibit either parallel or antiparallel alignment with respect to their long axis (different compositions). This depends on several factors that have been mapped herein and that can be precisely tuned: Flory-Huggins interaction parameter χ between polymer phases; concentration; shear rate; and even aggregate shape. Ultimately, two different aggregate structures result from rod tumbling that are not observed under quiescent conditions: monolayer-like aggregates exhibiting trapped rods with antiparallel configuration; and stacked nanorod arrays similar to superlattice sheets. These different structures can be controlled by the likelihood with which tumbling Janus rods encounter other aggregate portions showing parallel alignment. Hence, the present study offers fundamental insight into relevant parameters that govern the directed assembly of Janus nanoparticles at an interfacial level. Novel applications may potentially derive from the resulting aggregate structures, such as peculiar displays and sensors.
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Affiliation(s)
- Felipe L Paiva
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, Ohio 44106, United States
- School of Chemistry, Universidade Federal do Rio de Janeiro, Rua Horácio Macedo 2030, Cidade Universitária, Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Michael J A Hore
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, Ohio 44106, United States
| | - Argimiro Secchi
- Chemical Engineering Graduate Program (COPPE), Universidade Federal do Rio de Janeiro, Rua Horácio Macedo 2030, Cidade Universitária, Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Verônica Calado
- School of Chemistry, Universidade Federal do Rio de Janeiro, Rua Horácio Macedo 2030, Cidade Universitária, Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - João Maia
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, Ohio 44106, United States
| | - Shaghayegh Khani
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, Ohio 44106, United States
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Miwatani R, Takahashi KZ, Arai N. Performance of Coarse Graining in Estimating Polymer Properties: Comparison with the Atomistic Model. Polymers (Basel) 2020; 12:polym12020382. [PMID: 32046337 PMCID: PMC7077424 DOI: 10.3390/polym12020382] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/20/2020] [Accepted: 01/26/2020] [Indexed: 01/23/2023] Open
Abstract
Combining atomistic and coarse-grained (CG) models is a promising approach for quantitative prediction of polymer properties. However, the gaps between the length and time scales of atomistic and CG models still need to be bridged. Here, the scale gaps of the atomistic model of polyethylene melts, the bead–spring Kremer–Grest model, and dissipative particle dynamics with the slip-spring model were investigated. A single set of spatial and temporal scaling factors was determined between the atomistic model and each CG model. The results of the CG models were rescaled using the set of scaling factors and compared with those of the atomistic model. For each polymer property, a threshold value indicating the onset of static or dynamic universality of polymers was obtained. The scaling factors also revealed the computational efficiency of each CG model with respect to the atomistic model. The performance of the CG models of polymers was systematically evaluated in terms of both the accuracy and computational efficiency.
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Affiliation(s)
- Ryota Miwatani
- Department of Mechanical Engineering, Kindai University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8522, Japan;
| | - Kazuaki Z. Takahashi
- Research Center for Computational Design of Advanced Functional Materials, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
- Correspondence: ; Tel.: +81-29-861-2972; Fax: +81-29-861-5375
| | - Noriyoshi Arai
- Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, Kanagawa 223-8522, Japan;
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Zhang Q, Qiang Y, Duan C, Li W. Single Helix Self-Assembled by Frustrated ABC 2 Branched Terpolymers. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00110] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qi Zhang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Yicheng Qiang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Chao Duan
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Weihua Li
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
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10
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Xue D, Meng QB, Song XM. Magnetic-Responsive Janus Nanosheets with Catalytic Properties. ACS APPLIED MATERIALS & INTERFACES 2019; 11:10967-10974. [PMID: 30793582 DOI: 10.1021/acsami.8b21012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this article, we describe a method to fabricate magnetic-responsive Janus nanosheets with catalytic properties via the surface protection method. Fe3O4 nanoparticles and PW12O403--based ionic liquid are located on the two opposite sides of the Janus nanosheets, respectively. The Janus nanosheets are characterized by Fourier transform infrared, scanning electron microscopy, transmission electron microscopy, atomic force microscopy, and ζ-potential analyses. They are used as recyclable catalysts to the esterification reaction of methanol and oleic acid for their magnetic-responsive and catalytic properties. The esterification ratio is up to 80% and there is nearly no change when Fe3O4 nanoparticles/PW12O403--based ionic liquid composite nanosheets were recycled four times.
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Affiliation(s)
- Dan Xue
- Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry , Liaoning University , Shenyang 110036 , China
| | - Qing Bo Meng
- Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry , Liaoning University , Shenyang 110036 , China
| | - Xi-Ming Song
- Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry , Liaoning University , Shenyang 110036 , China
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Eslami H, Khanjari N, Müller-Plathe F. Self-Assembly Mechanisms of Triblock Janus Particles. J Chem Theory Comput 2018; 15:1345-1354. [DOI: 10.1021/acs.jctc.8b00713] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Hossein Eslami
- Department of Chemistry, College of Sciences, Persian Gulf University, Boushehr 75168, Iran
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie and Profile Area Thermo-Fluids & Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Strasse 8, 64287 Darmstadt, Germany
| | - Neda Khanjari
- Department of Chemistry, College of Sciences, Persian Gulf University, Boushehr 75168, Iran
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie and Profile Area Thermo-Fluids & Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Strasse 8, 64287 Darmstadt, Germany
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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: 11] [Impact Index Per Article: 1.6] [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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Liu X, Zhou C, Xia H, Zhou Y, Jiang W. Dissipative particle dynamics simulation on the self-assembly of linear ABC triblock copolymers under rigid spherical confinements. E-POLYMERS 2017. [DOI: 10.1515/epoly-2016-0306] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractAlthough a great deal of unique nanostructures were already obtained from polymer self-assemblies in terms of conventional parameters, the self-assembly under the confinement is still not well understood. Here, dissipative particle dynamics simulations were used to explore the self-assemble behaviors of linear ABC triblock copolymers under rigid spherical confinements. First several unusual morphologies, such as multilayer onion, coupled helix, and stacked lamella, were distinguished from the total 210 simulations. Second, the influences of three important parameters (block sequence, wall selectivity, and spherical radius) on the morphologies were discussed in detail. Finally, the dynamics evolution of several typical aggregates was examined. This simulation enriches micelle morphologies for the self-assembly of linear ABC triblock copolymers under rigid spherical confinements and is helpful to understand the formation of valuable nanostructures from linear ABC terpolymers.
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Affiliation(s)
- Xiaoqiang Liu
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
| | - Chun Zhou
- Institute of Chemical Materials, Chinese Academy of Engineering and Physics, 621900 Mianyang, China
| | - Honggang Xia
- The First Affiliated Hospital of Dalian Medical University, 116000 Dalian, China
| | - Yang Zhou
- Institute of Chemical Materials, Chinese Academy of Engineering and Physics, 621900 Mianyang, China
| | - Weidong Jiang
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
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15
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Kobayashi Y, Arai N. Self-assembly of surfactant aqueous solution confined in a Janus amphiphilic nanotube. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1319060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yusei Kobayashi
- Department of Mechanical Engineering, Kindai University, Osaka, Japan
| | - Noriyoshi Arai
- Department of Mechanical Engineering, Kindai University, Osaka, Japan
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16
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Bordin JR, Krott LB. How Competitive Interactions Affect the Self-Assembly of Confined Janus Dumbbells. J Phys Chem B 2017; 121:4308-4317. [DOI: 10.1021/acs.jpcb.7b01696] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- José Rafael Bordin
- Campus Caçapava
do Sul, Universidade Federal do Pampa, Av. Pedro Anunciação,
111, CEP 96570-000, Caçapava do Sul, RS, Brazil
| | - Leandro B. Krott
- Centro Araranguá, Universidade Federal de Santa Catarina, Rua Pedro João Pereira, 150, CEP 88905-120, Araranguá, SC, Brazil
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Kobayashi Y, Arai N. Self-Assembly and Viscosity Behavior of Janus Nanoparticles in Nanotube Flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:736-743. [PMID: 28056173 DOI: 10.1021/acs.langmuir.6b02694] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Janus nanoparticles (JNPs) have received considerable attention because of their characteristic physical properties that are due to more than two distinct chemical or physical surfaces. We investigated the rheological properties of a JNP solution in the nanotubes using a computer simulation. Prediction and control of the self-assembly of colloidal nanoparticles is of critical importance in materials chemistry and engineering. Herein, we show computer simulation evidence of a new type of velocity profile and a hallmark shear-thinning behavior by confining a JNP solution to a nanotube with hydrophobic and hydrophilic wall surfaces. We derived curves of the shear rate versus the viscosity for two quasi-one-dimensional nanotube systems including diluted and concentrated volume fractions of JNP solutions. For the diluted system, under relatively low shear rates, shear-thinning behavior with a moderate slope or behavior similar to a Newtonian fluid is observed because of the clustering of JNPs. Under relatively high shear rates, the slope of shear thinning changes markedly because the self-assembled structures are rearranged. Moreover, for concentrated systems, when the nanotube wall is hydrophobic, new characteristic velocity profiles that have not been reported before are observed. Our simulation offers a guide to control the rheological properties of JNP solutions by the chemical patterns on the surfaces of nanochannels, the effect of confinement, and the self-assembled structure.
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Affiliation(s)
- Yusei Kobayashi
- Department of Mechanical Engineering, Kindai University , Osaka, Japan
| | - Noriyoshi Arai
- Department of Mechanical Engineering, Kindai University , Osaka, Japan
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18
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Kobayashi Y, Arai N. Self-assembly of Janus nanoparticles with a hydrophobic hemisphere in nanotubes. SOFT MATTER 2016; 12:378-385. [PMID: 26497536 DOI: 10.1039/c5sm01895a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We performed molecular simulations to investigate the morphologies and phase diagrams of self-assembled diblock Janus nanoparticles (JNPs) confined in nanotubes. A JNP is a unique anisotropic nanoparticle, which typically has more than two distinct surfaces, each with different properties. We derived qualitative phase diagrams of axial pressure versus the ratio of the diameter of the nanoparticle and the nanotube. Three distinct types of nanotube walls were considered: hydrophobic, hydrophilic, and hydroneutral. We observed diverse morphologies in JNP solutions, many of which have not been observed in bulk solutions. We also compared the self-assembled structures of diblock and triblock patchy particles. Under weak confinement, significant differences were observed between the different JNP designs. The orientation ordering and self-assembly behaviours of the JNPs can be qualitatively predicted based on the chemical nature of the nanotube wall and the JNP design.
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Affiliation(s)
- Yusei Kobayashi
- Kinki University, Kowakae 3-4-1, Higashiosaka, Osaka, Japan.
| | - Noriyoshi Arai
- Kinki University, Kowakae 3-4-1, Higashiosaka, Osaka, Japan.
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Li Z, Wang P, Ma Y, Zhang J, Dai C, Yan Y, Liu B. Tuning the self-assembly of surfactants by the confinement of carbon nanotube arrays: a cornucopia of lamellar phase variants. NANOSCALE 2015; 7:6069-6074. [PMID: 25766304 DOI: 10.1039/c5nr00103j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Tuning the self-assembly of building blocks to obtain a kaleidoscope of nanostructures is very important and challenging for the preparation of advanced nanomaterials. Amphiphiles confined within carbon nanotube (CNT) arrays can self-assemble into complex structures that maintain the "bilayer" characteristic of a lamellar phase, we call them "lamellar phase variants (LPVs)". In this work, we carried out coarse-grained molecular dynamics (MD) studies to uncover novel LPVs. By varying the pattern of a CNT array, we obtained the "bilayer tube (BT) series", which contains circular, hexagonal, octagonal, and elliptical nanotubes. Furthermore, by introducing dislocation to CNT arrays, we obtained the "bilayer scroll (BS) series" that contains polymorphic nano-scrolls. These nanostructures are very novel and intriguing. To gain insights into the formation of LPVs, we studied the morphology evolution, which was demonstrated to be an unfamiliar "successive self-assembly process". These unusual self-assembling nanostructures and the formation process could provide clues for further studies on tuning the self-assembly of building blocks. The strategies developed in this work to obtain novel nanostructures are expected to facilitate the design and fabrication of nano-devices.
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Affiliation(s)
- Zhen Li
- College of Science, China University of Petroleum, 266580 Qingdao, Shandong, People's Republic of China.
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Chapela GA, Guzmán O, Martínez-González JA, Díaz-Leyva P, Quintana-H J. Self-assembly of kagome lattices, entangled webs and linear fibers with vibrating patchy particles in two dimensions. SOFT MATTER 2014; 10:9167-9176. [PMID: 25319927 DOI: 10.1039/c4sm01818d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A vibrating version of patchy particles in two dimensions is introduced to study self-assembly of kagome lattices, disordered networks of looping structures, and linear arrays. Discontinuous molecular dynamics simulations in the canonical ensemble are used to characterize the molecular architectures and thermodynamic conditions that result in each of those morphologies, as well as the time evolution of lattice formation. Several versions of the new model are tested and analysed in terms of their ability to produce kagome lattices. Due to molecular flexibility, particles with just attractive sites adopt a polarized-like configuration and assemble into linear arrays. Particles with additional repulsive sites are able to form kagome lattices, but at low temperature connect as entangled webs. Abundance of hexagonal motifs, required for the kagome lattice, is promoted even for very small repulsive sites but hindered when the attractive range is large. Differences in behavior between the new flexible model and previous ones based on rigid bodies offer opportunities to test and develop theories about the relative stability, kinetics of formation and mechanical response of the observed morphologies.
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Affiliation(s)
- Gustavo A Chapela
- Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, 09340 México, D.F., Mexico.
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Arai N. Structural analysis of telechelic polymer solution using dissipative particle dynamics simulations. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2014.938069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Chang HY, Tu SH, Sheng YJ, Tsao HK. Colloidosomes formed by nonpolar/polar/nonpolar nanoball amphiphiles. J Chem Phys 2014; 141:054906. [DOI: 10.1063/1.4891516] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Hung-Yu Chang
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Sheng-Hung Tu
- Department of Chemical and Materials Engineering, National Central University, Jhongli 320, Taiwan
| | - Yu-Jane Sheng
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Heng-Kwong Tsao
- Department of Chemical and Materials Engineering and Department of Physics, National Central University, Jhongli 320, Taiwan
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Markova O, Alberts J, Munro E, Lenne PF. Clustering of low-valence particles: structure and kinetics. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 90:022301. [PMID: 25215732 DOI: 10.1103/physreve.90.022301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Indexed: 06/03/2023]
Abstract
We compute the structure and kinetics of two systems of low-valence particles with three or six freely oriented bonds in two dimensions. The structure of clusters formed by trivalent particles is complex with loops and holes, while hexavalent particles self-organize into regular and compact structures. We identify the elementary structures which compose the clusters of trivalent particles. At initial stages of clustering, the clusters of trivalent particles grow with a power-law time dependence. Yet at longer times fusion and fission of clusters equilibrates and clusters form a heterogeneous phase with polydispersed sizes. These results emphasize the role of valence in the kinetics and stability of finite-size clusters.
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Affiliation(s)
- Olga Markova
- Institut de Biologie du Développement de Marseille, UMR7288 CNRS/Aix-Marseille Université, Campus de Luminy, 13288 Marseille cedex 9, France
| | - Jonathan Alberts
- University of Washington, 620 University Rd., Friday Harbor, Washington 98250, USA
| | - Edwin Munro
- Department of Molecular Genetics and Cell Biology, University of Chicago, 5801 South Ellis Avenue, Chicago, Illinois 60637, USA
| | - Pierre-François Lenne
- Institut de Biologie du Développement de Marseille, UMR7288 CNRS/Aix-Marseille Université, Campus de Luminy, 13288 Marseille cedex 9, France
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