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Xu M, Kim EJ, Lee YJ, Lee H, Jung K, Choi J, Kim SH, Kim Y, Yun H, Kim BJ. Icosahedral supracrystal assembly from polymer-grafted nanoparticles via interplay of interfacial energy and confinement effect. SCIENCE ADVANCES 2024; 10:eado0745. [PMID: 38875331 PMCID: PMC11177942 DOI: 10.1126/sciadv.ado0745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 05/13/2024] [Indexed: 06/16/2024]
Abstract
Self-assembly of nanoparticles (NPs) in drying emulsion droplets paves the way for intricate three-dimensional (3D) superstructures, given the myriad of control parameters for fine-tuning assembly conditions. With their substantial energetic dynamics that are acutely responsive to emulsion confinements, polymeric ligands incorporated into a system can enrich its structural diversity. Here, we demonstrate the assembly of soft polymer-grafted NPs into Mackay icosahedrons beyond spherical body-centered cubic (BCC) packing structures commonly observed for these soft spheres. This behavior is governed by the free energy minimization within emulsions through the interplay of the oil-water interfacial energy and confinement effect as demonstrated by the experimental observations of structural transitions between icosahedrons and BCC crystals and by corresponding free energy calculations. The anisotropic surface of the icosahedral supracrystals provides the capability of guiding the position of a secondary constituent, creating unique hybrid patchy icosahedrons with the potential to develop into multifunctional 3D clusters that combine the benefits of both polymers and conventional colloids.
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Affiliation(s)
- Meng Xu
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Eun Ji Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Young Jun Lee
- Carbon Composite Materials Research Center, Korea Institute of Science and Technology, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeonbuk 55324, Republic of Korea
| | - Hyunsoo Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Kyunghyun Jung
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jaeyoung Choi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - YongJoo Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hongseok Yun
- Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul 04763, Republic of Korea
| | - Bumjoon J Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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2
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Moinuddin M, Rane K. Effect of shape anisotropy on the precipitation of dimeric nanoparticles. SOFT MATTER 2023; 19:8604-8616. [PMID: 37909104 DOI: 10.1039/d3sm00827d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
We use grand canonical transition matrix Monte Carlo simulations to study the precipitation of dimeric nanoparticles. The dimers are composed of two particles having different chemical features and separated by a fixed distance. The non-attractive and attractive parts of the dimer are modeled using hard-sphere and square-well potentials, respectively. The shape anisotropy is altered by changing the relative sizes of the two particles. We observe that the stability of the nanosuspension increases with the increase in the size of the non-attractive part of the dimer. The precipitates of dimers having larger non-attractive parts have lower packing densities, contain large cavities, and show evidence of self-assembly in the bulk and on the surface. We also use the results from our simulations and the classical nucleation theory to study the kinetics of precipitation. At a given temperature and relative supersaturation, the rate of homogeneous nucleation increases with the increase in the size of the non-attractive parts. Finally, we use an example to show how our results can guide the design of nanosuspensions containing chemically anisotropic dimers that are stable under particular conditions.
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Affiliation(s)
- Md Moinuddin
- Discipline of Chemical Engineering, Indian Institute of Technology Gandhinagar, Gujarat, 382355, India.
| | - Kaustubh Rane
- Discipline of Chemical Engineering, Indian Institute of Technology Gandhinagar, Gujarat, 382355, India.
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3
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Moinuddin M, Tripathy M. Effect of Architecture and Topology on the Self-Assembly of Polymer-Grafted Nanoparticles. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Md Moinuddin
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai400076, Maharashtra, India
| | - Mukta Tripathy
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai400076, Maharashtra, India
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4
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Diaz J, Pinna M, Zvelindovsky AV, Pagonabarraga I. Parallel Hybrid Simulations of Block Copolymer Nanocomposites using Coarray Fortran. MACROMOL THEOR SIMUL 2021. [DOI: 10.1002/mats.202100007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Javier Diaz
- CECAM Centre Européen de Calcul Atomique et Moléculaire École Polytechnique Fédérale de Lausanne Batochime ‐ Avenue Forel 2 Lausanne 1015 Switzerland
| | - Marco Pinna
- Centre for Computational Physics University of Lincoln Brayford Pool Lincoln LN6 7TS UK
| | | | - Ignacio Pagonabarraga
- CECAM Centre Européen de Calcul Atomique et Moléculaire École Polytechnique Fédérale de Lausanne Batochime ‐ Avenue Forel 2 Lausanne 1015 Switzerland
- Departament de Física de la Matèria Condensada Universitat de Barcelona Martí i Franquès 1 Barcelona 08028 Spain
- Universitat de Barcelona Institute of Complex Systems (UBICS) Universitat de Barcelona Barcelona 08028 Spain
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5
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Yun H, Lee YJ, Xu M, Lee DC, Stein GE, Kim BJ. Softness- and Size-Dependent Packing Symmetries of Polymer-Grafted Nanoparticles. ACS NANO 2020; 14:9644-9651. [PMID: 32806057 DOI: 10.1021/acsnano.0c00668] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Achieving ordered arrays of nanoparticles (NPs) with controlled packing symmetry and interparticle spacing is of great importance to design complex metamaterials. Herein, we report softness- and size-dependent self-assembly behavior of polystyrene-grafted Au NPs (Au@PS NPs). We varied the core size of Au NPs from 1.9 to 9.6 nm and the number-average molecular weight (Mn) of thiol-terminated polystyrene from 1.8 to 7.9 kg mol-1. The optimal packing model based on an "effective softness" parameter λeff that accounts for close-packed and semidilute brush regimes could predict the effective radius of Au@PS NPs (within ±9%) for a wide range of PS Mn, grafting density, and Au core size. With increasing λeff, the self-assembled Au@PS NP superlattices undergo a symmetry transition from hexagonal close packed (hcp) to body-centered tetragonal (bct) to body-centered cubic (bcc). This work demonstrates the effective softness model as a simple but robust tool for the design of NP superlattices with precisely controlled interparticle distance and packing symmetry, both of which are critical for the development of sophisticated materials through control of nanoscale structure.
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Affiliation(s)
- Hongseok Yun
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Young Jun Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Meng Xu
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Doh C Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Gila E Stein
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bumjoon J Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
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6
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Jia XM, Qian HJ, Lu ZY. The interfacial structure and dynamics in a polymer nanocomposite containing small attractive nanoparticles: a full atomistic molecular dynamics simulation study. Phys Chem Chem Phys 2020; 22:11400-11408. [PMID: 32374336 DOI: 10.1039/d0cp00799d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We study the interfacial structure and dynamics of a polymer nanocomposite (PNC) composed of octaaminophenyl polyhedral oligomeric silsesquioxane (OAPS) and poly(2-vinylpyridine) (P2VP) by performing full atomistic molecular dynamics simulations. There are eight aminophenyl groups grafted on the surface of the OAPS particle and the particle has a size comparable to the Kuhn segment of P2VP. These aminophenyl groups can form hydrogen bonds (HBs) with pyridine rings from surrounding P2VP chains. We found that OAPS can form ∼2 HBs on average with surrounding polymer chains. The effect of the HBs is investigated in detail by either switching on or off these HBs in our simulation. By analyzing the interfacial static packing structure and dynamic properties, we demonstrate that the system has an ∼1 nm interface width, similar to the OAPS particle size. We also found that HBs can prevent the further penetration of polymers into the inner zone (grafting layer) of the OAPS, and therefore keep the P2VP chains in the outer layer (>1 nm), remaining bulk-like, which is well consistent with experimental results. In addition, we found that NP diffusion is coupled to the absorbed polymer chains, which also dramatically slows down the diffusion of polymer segments in return. The core-shell model in which the NP and absorbed polymers diffuse as a single object is validated here at the full atomistic level. These results provide atomistic insights into the unique structure and dynamics in the small attractive NP-polymer interfacial region. We hope these results will be helpful for the understanding of peculiar phenomena in attractive polymer nanocomposites containing small NPs.
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Affiliation(s)
- Xiang-Meng Jia
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130021, China.
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7
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Segregation of Maghemite Nanoparticles within Symmetric Diblock Copolymer and Triblock Terpolymer Patterns under Solvent Vapor Annealing. MATERIALS 2020; 13:ma13061286. [PMID: 32178427 PMCID: PMC7142801 DOI: 10.3390/ma13061286] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/26/2020] [Accepted: 03/05/2020] [Indexed: 11/27/2022]
Abstract
Block copolymers (BCPs), through their self-assembly, provide an excellent guiding platform for precise controlled localization of maghemite nanoparticles (MNPs). Diblock copolymers (di/BCP) represent the most applied matrix to host filler components due to their morphological simplicity. A series of nanocomposites based on diblock copolymer or triblock terpolymer matrices and magnetic nanoparticles were prepared to study and compare the influence of an additional block into the BCP matrix. MNPs were grafted with low molecular weight polystyrene (PS) chains in order to be segregated in a specific phase of the matrix to induce selective localization. After the mixing of the BCPs with 10% w/v PS-g-MNPs, nanocomposite thin films were formed by spin coating. Solvent vapor annealing (SVA) enabled the PS-g-MNPs selective placement within the PS domains of the BCPs, as revealed by atomic force microscopy (AFM). The recorded images have proven that high amounts of functionalized MNPs can be controllably localized within the same block (PS), despite the architecture of the BCPs (AB vs. ABC). The adopted lamellar structure of the “neat” BCP thin films was maintained for MNPs loading approximately up to 10% w/v, while, for higher content, the BCP adopted lamellar morphology is partially disrupted, or even disappears for both AB and ABC architectures.
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8
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Medidhi KR, Padmanabhan V. Diffusion of polymer-grafted nanoparticles in a homopolymer matrix. J Chem Phys 2019; 150:044905. [DOI: 10.1063/1.5084146] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Koteswara Rao Medidhi
- Department of Chemical Engineering, Tennessee Technological University, Cookeville, Tennessee 38505, USA
| | - Venkat Padmanabhan
- Department of Chemical Engineering, Tennessee Technological University, Cookeville, Tennessee 38505, USA
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9
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Kumar SK, Ganesan V, Riggleman RA. Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids. J Chem Phys 2018; 147:020901. [PMID: 28711055 DOI: 10.1063/1.4990501] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
This topical review discusses the theoretical progress made in the field of polymer nanocomposites, i.e., hybrid materials created by mixing (typically inorganic) nanoparticles (NPs) with organic polymers. It primarily focuses on the outstanding issues in this field and is structured around five separate topics: (i) the synthesis of functionalized nanoparticles; (ii) their phase behavior when mixed with a homopolymer matrix and their assembly into well-defined superstructures; (iii) the role of processing on the structures realized by these hybrid materials and the role of the mobilities of the different constituents; (iv) the role of external fields (electric, magnetic) in the active assembly of the NPs; and (v) the engineering properties that result and the factors that control them. While the most is known about topic (ii), we believe that significant progress needs to be made in the other four topics before the practical promise offered by these materials can be realized. This review delineates the most pressing issues on these topics and poses specific questions that we believe need to be addressed in the immediate future.
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Affiliation(s)
- Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10025, USA
| | - Venkat Ganesan
- Department of Chemical Engineering, University of Texas, Austin, Texas 78712, USA
| | - Robert A Riggleman
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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10
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Wang HS, Khan A, Choe Y, Huh J, Bang J. Architectural Effects of Organic Nanoparticles on Block Copolymer Orientation. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00865] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Hyun Suk Wang
- Department
of Chemical and Biological Engineering, Korea University, Seoul 136-713, Republic of Korea
| | - Anzar Khan
- Department
of Chemical and Biological Engineering, Korea University, Seoul 136-713, Republic of Korea
| | - Youngson Choe
- Department
of Chemical Engineering, Pusan National University, Kumjeong-ku, Busan 609-735, Republic of Korea
| | - June Huh
- Department
of Chemical and Biological Engineering, Korea University, Seoul 136-713, Republic of Korea
| | - Joona Bang
- Department
of Chemical and Biological Engineering, Korea University, Seoul 136-713, Republic of Korea
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11
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Self-organization of homopolymer brush- and mixed homopolymer brush-grafted silica nanoparticles in block copolymers and polymer blends. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.02.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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12
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Barandiaran I, Kortaberria G. Magnetic nanocomposites based on poly(styrene- b -butadiene- b -methyl methacrylate) and modified Fe 2 O 3 nanoparticles. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.03.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Ferrier RC, Huang Y, Ohno K, Composto RJ. Dispersion of PMMA-grafted, mesoscopic iron-oxide rods in polymer films. SOFT MATTER 2016; 12:2550-2556. [PMID: 26908174 DOI: 10.1039/c5sm02460a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study investigates the parameters that affect the dispersion of polymer grafted mesoscopic iron-oxide rods (FeMRs) in polymer matrices. FeMRs (212 nm long by 36 nm in diameter) are grafted with poly(methyl methacrylate) (PMMA) at three different brush molecular weights: 3.7 kg mol(-1), 32 kg mol(-1), and 160 kg mol(-1). Each FeMR sample was cast in a polymer thin film consisting of either PMMA or poly(ethylene oxide) (PEO) each at a molecular weight much higher or much lower than the brush molecular weight. We find that the FeMRs with 160 kg mol(-1) brush disperse in all matrices while the FeMRs with 32 kg mol(-1) and 3.7 kg mol(-1) brushes aggregate in all matrices. We perform simple free energy calculations, taking into account steric repulsion from the brush and van der Waals attraction between FeMRs. We find that there is a barrier for aggregation for the FeMRs with the largest brush, while there is no barrier for the other FeMRs. Therefore, for these mesoscopic particles, the brush size is the main factor that determines the dispersion state of FeMRs in polymer matrices with athermal or weakly attractive brush-matrix interactions. These studies provide new insight into the mechanisms that affect dispersion in polymer matrices of mesoscopic particles and therefore guide the design of composite films with well-dispersed mesoscopic particles.
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Affiliation(s)
- Robert C Ferrier
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Yun Huang
- Institute for Chemical Research, Kyoto University, Uji, Kyoto, Japan
| | - Kohji Ohno
- Institute for Chemical Research, Kyoto University, Uji, Kyoto, Japan
| | - Russell J Composto
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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14
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Nanocomposites based on nanostructured PI-b-PMMA copolymer and selectively placed PMMA-modified magnetic nanoparticles: Morphological and magnetic characterization. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Wang L, Liu H, Li F, Shen J, Zheng Z, Gao Y, Liu J, Wu Y, Zhang L. Stress–strain behavior of block-copolymers and their nanocomposites filled with uniform or Janus nanoparticles under shear: a molecular dynamics simulation. Phys Chem Chem Phys 2016; 18:27232-27244. [DOI: 10.1039/c6cp05853a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We adopted molecular dynamics simulation to study the relation between the ordered structures and the resulting mechanical properties of block copolymers filled with uniform or Janus nanoparticles.
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Affiliation(s)
- Lu Wang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- People's Republic of China
| | - Hongji Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- People's Republic of China
| | - Fanzhu Li
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- People's Republic of China
| | - Jianxiang Shen
- College of Materials and Textile Engineering
- Jiaxing University
- Jiaxing 314001
- P. R. China
| | - Zijian Zheng
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources
| | - Yangyang Gao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources
| | - Youping Wu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources
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16
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Onses MS, Wan L, Liu X, Kiremitler NB, Yılmaz H, Nealey PF. Self-Assembled Nanoparticle Arrays on Chemical Nanopatterns Prepared Using Block Copolymer Lithography. ACS Macro Lett 2015; 4:1356-1361. [PMID: 35614782 DOI: 10.1021/acsmacrolett.5b00644] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We present a high-throughput and inexpensive fabrication approach that uses self-assembled block copolymer (BCP) films as templates to generate dense nanoscale chemical patterns of polymer brushes for the selective immobilization of Au nanoparticles (NPs). A cross-linked random copolymer mat that contains styrene and methyl methacrylate units serves both as a base layer for perpendicular assembly of nanoscale domains of poly(styrene-block-methyl methacrylate) (PS-b-PMMA) films and as a nonadsorbing background layer that surrounds the chemical patterns. The selective removal of the PMMA block and the underlying mat via oxygen plasma etching generates binding sites which are then functionalized with poly(2-vinylpyridine) (P2VP) brushes. Au NPs with a diameter of 13 nm selectively immobilize on the patterned P2VP brushes. An essential aspect in fabricating high quality chemical patterns is the superior behavior of methyl methacrylate containing cross-linked mats in retaining their chemistry during the grafting of P2VP brushes. The use of BCPs with different molecular weights and volume fractions allows for preparation of chemical patterns with different geometries, sizes, and pitches for generating arrays of single particles that hold great promise for applications that range from molecular sensing to optical devices.
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Affiliation(s)
- M. Serdar Onses
- Department
of Materials Science and Engineering, Nanotechnology Research Center (ERNAM) Erciyes University, Kayseri, 38039, Turkey
| | - Lei Wan
- HGST, a Western
Digital Company, San Jose Research
Center 3403 Yerba Buena Road, San Jose, California 95135, United States
| | - Xiaoying Liu
- Institute
for Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, United States
| | - N. Burak Kiremitler
- Department
of Materials Science and Engineering, Nanotechnology Research Center (ERNAM) Erciyes University, Kayseri, 38039, Turkey
| | - Hatice Yılmaz
- Department
of Materials Science and Engineering, Nanotechnology Research Center (ERNAM) Erciyes University, Kayseri, 38039, Turkey
| | - Paul F. Nealey
- Institute
for Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, United States
- Argonne National
Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
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17
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Barandiaran I, Kortaberria G. Selective placement of magnetic Fe3O4 nanoparticles into the lamellar nanostructure of PS-b-PMMA diblock copolymer. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.04.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Lo CT, Li MH, Lin WT. The dispersion state of magnetic nanorods in homopolymers and block copolymers. J Chem Phys 2015; 142:184903. [DOI: 10.1063/1.4921042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Chieh-Tsung Lo
- Department of Chemical Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 701, Taiwan
| | - Ming-Hsuan Li
- Department of Chemical Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 701, Taiwan
| | - Wei-Ting Lin
- Department of Chemical Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 701, Taiwan
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19
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Kao J, Xu T. Nanoparticle Assemblies in Supramolecular Nanocomposite Thin Films: Concentration Dependence. J Am Chem Soc 2015; 137:6356-65. [DOI: 10.1021/jacs.5b02494] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joseph Kao
- Department of Materials Science & Engineering, University of California, Berkeley, California 94720, United States
| | - Ting Xu
- Department of Materials Science & Engineering, University of California, Berkeley, California 94720, United States
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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20
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Rossner C, Vana P. Nanocomposites and Self-Assembled Structures via Controlled Radical Polymerization. CONTROLLED RADICAL POLYMERIZATION AT AND FROM SOLID SURFACES 2015. [DOI: 10.1007/12_2015_314] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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21
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Sarkar B, Alexandridis P. Block copolymer–nanoparticle composites: Structure, functional properties, and processing. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2014.10.009] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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22
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Barandiaran I, Kortaberria G. Synthesis and characterization of nanostructured PS-b-P4VP/Fe2O3 thin films with magnetic properties prepared by solvent vapor annealing. RSC Adv 2015. [DOI: 10.1039/c5ra21477g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work hybrid organic/inorganic nanocomposites with magnetic properties, based on a PS-b-P4VP block copolymer and Fe2O3 maghemite nanoparticles have been prepared.
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Affiliation(s)
- I. Barandiaran
- “Materials + Tecnhologies” Group
- Euskal Herriko Unibertsitatea (UPV/EHU)
- 20018 Donostia
- Spain
| | - G. Kortaberria
- “Materials + Tecnhologies” Group
- Euskal Herriko Unibertsitatea (UPV/EHU)
- 20018 Donostia
- Spain
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23
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Xie Y, Sougrat R, Nunes SP. Synthesis and characterization of polystyrene coated iron oxide nanoparticles and asymmetric assemblies by phase inversion. J Appl Polym Sci 2014. [DOI: 10.1002/app.41368] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yihui Xie
- Water Desalination and Reuse Center; King Abdullah University of Science and Technology; 23955-6900 Thuwal Saudi Arabia
| | - Rachid Sougrat
- Imaging and Characterization Lab; King Abdullah University of Science and Technology; 23955-6900 Thuwal Saudi Arabia
| | - Suzana P. Nunes
- Water Desalination and Reuse Center; King Abdullah University of Science and Technology; 23955-6900 Thuwal Saudi Arabia
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24
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Zhang Z, Li T, Nies E. Mesoscale Simulations of Cylindrical Nanoparticle-Driven Assembly of Diblock Copolymers in Concentrated Solutions. Macromolecules 2014. [DOI: 10.1021/ma500690g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zunmin Zhang
- Division of Polymer Chemistry
and Materials, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Ting Li
- Division of Polymer Chemistry
and Materials, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Erik Nies
- Division of Polymer Chemistry
and Materials, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
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25
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Sanwaria S, Horechyy A, Wolf D, Chu CY, Chen HL, Formanek P, Stamm M, Srivastava R, Nandan B. Helical Packing of Nanoparticles Confined in Cylindrical Domains of a Self-Assembled Block Copolymer Structure. Angew Chem Int Ed Engl 2014; 53:9090-3. [DOI: 10.1002/anie.201403565] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Indexed: 11/08/2022]
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26
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Sanwaria S, Horechyy A, Wolf D, Chu CY, Chen HL, Formanek P, Stamm M, Srivastava R, Nandan B. Helixförmige Packung von Nanopartikeln, eingeschlossen in zylindrische Domänen einer selbstorganisierten Blockcopolymerstruktur. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403565] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Horechyy A, Nandan B, Zafeiropoulos NE, Jehnichen D, Göbel M, Stamm M, Pospiech D. Nanoparticle directed domain orientation in thin films of asymmetric block copolymers. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3251-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Wu J, Li H, Wu S, Huang G, Xing W, Tang M, Fu Q. Influence of magnetic nanoparticle size on the particle dispersion and phase separation in an ABA triblock copolymer. J Phys Chem B 2014; 118:2186-93. [PMID: 24479376 DOI: 10.1021/jp410604a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Oleic acid modified iron oxide nanoparticles (IONs) with different sizes were synthesized and mixed with styrene-butadiene-styrene block copolymer (SBS) with a lamellar structure. The octadecene segments on the oleic acid molecules have chemical affinity with the polybutadiene (PB) blocks, which makes IONs tend to be selectively confined in the microphase-separated PB domains. However, the dispersion state strongly depends on the ratio of the particle diameter (d) to the lamellar thickness (l) of the PB domains, which further changes the phase separation of SBS. When d/l ∼0.5, most of IONs are concentrated in the middle of the PB layers at low particle loading. Upon increasing the particle loading, part of IONs contact each other to form long strings due to their strong magnetic interactions. Away from the strings, IONs are either selectively dispersed in the middle and at the interfaces of the PB domains, or randomly distributed at some regions in which the phase separation of SBS is suppressed. The phase separation of SBS transforms from the lamellar structure to a cylinder structure when the IONs loading is higher than 16.7 wt %. As d is comparable to l, IONs aggregate to form clusters of 100 to 300 nm in size, but within the clusters IONs are still selectively dispersed in the PB domains instead of forming macroscopic phase separation. It is interpreted in terms of the relatively small conformational entropy of the middle blocks of SBS; thus, incorporation of nanoparticles does not lead to much loss of conformational entropy. Although incorporation of IONs with d/l ∼1 significantly increases the interfacial curvature and roughness, it has less influence on the phase separation structure of SBS due to the inhomogeneous dispersion. When d is larger than l, IONs are macroscopically separated from the SBS matrix to form clusters of hundreds of nanometers to several micrometers. More interestingly, the phase separation of SBS transforms from the lamellar structure to a two-phase co-continuous structure, probably due to the rearrangement of SBS molecules to cover the clusters with PB segments and the strong magnetic interaction exerting additional force on the SBS matrix during the evaporation of the solvent and the subsequent thermal annealing process.
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Affiliation(s)
- Jinrong Wu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu 610065, China
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29
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Ledo-Suárez A, Hoppe CE, Lazzari M, Lopez Quintela MA, Zucchi IA. Thermal annealing as an easy tool for the controlled arrangement of gold nanoparticles in block-copolymer thin films. NANOTECHNOLOGY 2013; 24:255304. [PMID: 23723175 DOI: 10.1088/0957-4484/24/25/255304] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Thermal annealing was used for the bottom-up fabrication of morphologically controlled gold-block-copolymer (Au-BC) nanocomposites. Three different blends formed by polystyrene (PS) homopolymer and PS-coated gold nanoparticles (PSSH@Au) were used as modifiers of asymmetric polystyrene-b-polymethylmethacrylate (PS-b-PMMA): PS26/PS26SH@Au, PS75/PS75SH@Au and PS167/PS167SH@Au (where the subscripts refer to the number of styrene monomeric units).The results indicated that all three blends used as modifiers (PSn/PSnSH@Au) were successfully located in the PS phase during thermally induced BC self-assembly for a composition range from 5 to 43 wt% without macro-phase separation. The PSnSH@Au moiety experienced molecular desorption, nanocrystal core coalescence and partial molecular re-encapsulation processes during thermal annealing, leading to sphere-like gold NPs with a larger average size (without exceeding an interdomain distance). Ligand chain length regulated the degree of coalescence and re-encapsulation, defining ultimate core size. Furthermore, proper combination of chain length and composition enabled tuning of NP partitioning and arrangement on different length scales through thermally activated cooperative assembly processes. These results have not only significant impact for establishing thermal processing as a useful tool for the precise control of NP size and distribution, but also much broader implications for many nanoparticle-based technologies.
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Affiliation(s)
- Ana Ledo-Suárez
- Centre for Research in Biological Chemistry and Molecular Materials (CIQUS), c Jenaro de la Fuente-Campus Vida, University of Santiago de Compostela (USC), E-15782 Santiago de Compostela, Spain
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30
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Lo CT, Lin WT. Effect of Rod Length on the Morphology of Block Copolymer/Magnetic Nanorod Composites. J Phys Chem B 2013; 117:5261-70. [DOI: 10.1021/jp308723q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chieh-Tsung Lo
- Department of Chemical Engineering, National Cheng Kung University, No. 1, University Road, Tainan
City 701, Taiwan
| | - Wei-Ting Lin
- Department of Chemical Engineering, National Cheng Kung University, No. 1, University Road, Tainan
City 701, Taiwan
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31
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Wakayama H, Yonekura H, Kawai Y. Three-Dimensional Periodically Ordered Nanohetero Metallic Materials from Self-Assembled Block Copolymer Composites. ACS Macro Lett 2013; 2:284-287. [PMID: 35581751 DOI: 10.1021/mz300634p] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We report a synthetic route to inorganic nanoheterostructures with tunable size and morphology via self-assembled block copolymer mesophase templates. Two Fe precursors, tricarbonyl(cyclooctatetraene) iron and acetylacetonate iron(III), and one Pt precursor, platinum dimethylcyclooctadiene, were selectively introduced into separate polymer blocks of a block copolymer, polystyrene-b-poly-4-vinylpyridine, and then the block copolymer templates were removed by pyrolysis. Self-assembled inorganic nanoheterostructures (spheres, hexagonal cylinders, and layers of hard magnetic phase FePt in a matrix of soft magnetic phase α-Fe) were produced. The morphology and domain size of the nanoheterostructures could be tailored by controlling the molecular weight and relative block lengths of the block copolymers. The controlled size and morphology of the inorganic nanoheterostructures demonstrate the method's utility for producing highly functional materials.
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Affiliation(s)
- Hiroaki Wakayama
- Toyota Central R&D Laboratories, Inc., Nagakute, Aichi 480-1192, Japan
| | - Hirotaka Yonekura
- Toyota Central R&D Laboratories, Inc., Nagakute, Aichi 480-1192, Japan
| | - Yasuaki Kawai
- Toyota Central R&D Laboratories, Inc., Nagakute, Aichi 480-1192, Japan
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32
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Affiliation(s)
- Chieh-Tsung Lo
- Department of Chemical Engineering; National Cheng Kung University; 1 University Road; Tainan City; 701; Taiwan
| | - Kai-Hsiang Tsui
- Department of Chemical Engineering; National Cheng Kung University; 1 University Road; Tainan City; 701; Taiwan
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33
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Harirchian-Saei S, Wang MCP, Gates BD, Moffitt MG. Directed polystyrene/poly(methyl methacrylate) phase separation and nanoparticle ordering on transparent chemically patterned substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10838-10848. [PMID: 22738388 DOI: 10.1021/la301298p] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We investigate the surface-directed phase separation of spin-coated polystyrene/poly(methyl methacrylate) (PS/PMMA) blends on prepatterned octadecyltrichlorosilane (OTS)-glass substrates under various experimental conditions. As a result of tandem processes of spinodal decomposition and selective wetting of polymer components during spin-coating, low-energy OTS stripes and high-energy glass surfaces laterally arrange the phase-separated polymers according to the chemical pattern on the substrate. Optimal pattern replication was achieved when the length scale of phase separation, controlled via the polymer concentration of the spin-coating solution, matched the smallest feature dimension in a striped chemical pattern possessing two alternating distances between stripes. It was also shown that polymer blend patterns were most closely registered with the underlying substrate when the PS/PMMA composition ratio (30/70, w/w) matched the areal fraction of OTS on the glass surface (∼30%). The influence of solvents demonstrated that a solvent with a relatively low volatility, such toluene, was required for patterning so that domain feature sizes were able to coarsen to the size of the patterned features before film vitrification. As well, we showed that the technique and optimized conditions developed in this study could be applied to pattern photoluminescent CdS quantum dots into microscale arrays of parallel lines via spin-coating onto transparent OTS-glass substrates.
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Affiliation(s)
- Saman Harirchian-Saei
- Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, BC V8W 3V6, Canada
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34
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Tamborini E, Ghofraniha N, Oberdisse J, Cipelletti L, Ramos L. Structure of nanoparticles embedded in micellar polycrystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:8562-8570. [PMID: 22578107 DOI: 10.1021/la301369z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We investigate by scattering techniques the structure of water-based soft composite materials comprising a crystal made of Pluronic block-copolymer micelles arranged in a face-centered cubic lattice and a small amount (at most 2% by volume) of silica nanoparticles, of size comparable to that of the micelles. The copolymer is thermosensitive: it is hydrophilic and fully dissolved in water at low temperature (T ~ 0 °C), and self-assembles into micelles at room temperature, where the block-copolymer is amphiphilic. We use contrast matching small-angle neuron scattering experiments to independently probe the structure of the nanoparticles and that of the polymer. We find that the nanoparticles do not perturb the crystalline order. In addition, a structure peak is measured for the silica nanoparticles dispersed in the polycrystalline samples. This implies that the samples are spatially heterogeneous and comprise, without macroscopic phase separation, silica-poor and silica-rich regions. We show that the nanoparticle concentration in the silica-rich regions is about 10-fold the average concentration. These regions are grain boundaries between crystallites, where nanoparticles concentrate, as shown by static light scattering and by light microscopy imaging of the samples. We show that the temperature rate at which the sample is prepared strongly influence the segregation of the nanoparticles in the grain-boundaries.
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Affiliation(s)
- Elisa Tamborini
- Université Montpellier 2, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France
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35
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Zhang H, Liu Y, Yao D, Yang B. Hybridization of inorganic nanoparticles and polymers to create regular and reversible self-assembly architectures. Chem Soc Rev 2012; 41:6066-88. [PMID: 22641116 DOI: 10.1039/c2cs35038f] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Inorganic nanoparticles (NPs) with diversified functionalities are promising candidates in future optoelectronic and biomedical applications, which greatly depend on the capability to arrange NPs into higher-order architectures in a controllable way. This issue is considered to be solved by means of self-assembly. NPs can participate in self-assembly in different manners, such as smart self-organization with blended molecules, as the carriers of host molecules for assembly and disassembly with guest molecules, as netpoints to endow the architectures specific functionalities, and so forth. To enhance the structural stability of the as-prepared assembly architectures, polymers have been utilized to create NP-polymer composites. Meanwhile, such a strategy also demonstrates the possibility of integrating the functionalities of NPs and/or polymers by forming regular architectures. The emerging interest in the current optoelectronic and biological areas strongly demands intelligent nanocomposites, which are produced by combination of the excellent functionalities of NPs and the responsiveness of polymers. On the basis of the recent progress in fabricating NP-polymer composites, this critical review summarizes the development of new methods for fabricating regular self-assembly architectures, highlights the reversible assembly and disassembly behavior, and indicates the potential applications.
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Affiliation(s)
- Hao Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China
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36
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Jiang G, Hore MJA, Gam S, Composto RJ. Gold nanorods dispersed in homopolymer films: optical properties controlled by self-assembly and percolation of nanorods. ACS NANO 2012; 6:1578-1588. [PMID: 22283716 DOI: 10.1021/nn2045449] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this paper, polymer nanocomposite films containing gold nanorods (AuNRs) and poly(2-vinyl pyridine) (P2VP) have been investigated for their structure-optical property relationship. Using transmission electron microscopy (TEM), the assembly of AuNRs (7.9 nm × 28.4 nm) grafted with a P2VP brush in P2VP films is examined as a function of the AuNR volume fraction Ø(AuNRs) and film thickness h. For h ∼ 40 nm, AuNRs are confined to align parallel to the film and uniformly dispersed at low Ø(AuNRs). Upon increasing Ø(AuNRs), nanorods form discrete aggregates containing mainly side-by-side arrays due to depletion-attraction forces. For Ø(AuNRs) = 2.7%, AuNRs assemble into a 2D network where the discrete aggregates are connected by end-to-end linked nanorods. As Ø(AuNRs) further increases, the polymer-rich regions of the network fill in with nanorods and rod overlap is observed. Monte Carlo simulations capture the experimentally observed morphologies. The effect of film thickness is investigated at Ø(AuNRs) = 2.7%, where thicker films (40 and 70 nm) show a dense array of percolated nanorods and thinner films (20 nm) exhibit mainly isolated nanorods. Using Rutherford backscattering spectrometry (RBS), the AuNRs are observed to segregate near the substrate during spin-casting. Optically, the longitudinal surface plasmon resonance (LSPR) peaks are correlated with the local orientation of the AuNRs, where side-by-side and end-to-end alignments induce blue and red shifts, respectively. The LSPR undergoes a red shift up to 51 nm as Ø(AuNRs) increases from 1.6 to 2.7%. These studies indicate that the optical properties of polymer nanocomposite films containing gold nanorods can be fine-tuned by changing Ø(AuNRs) and h. These results are broadly applicable and provide guidelines for dispersing other functional nanoparticles, such as quantum dots and carbon nanotubes.
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Affiliation(s)
- Guoqian Jiang
- Department of Materials Science and Engineering and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6272, United States
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37
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Wang L, Lin J, Zhu X. Janus nanoparticles meet block copolymer scaffolds: on the influence of nanoparticle sizes. RSC Adv 2012. [DOI: 10.1039/c2ra21685j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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38
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Aissou K, Fleury G, Pecastaings G, Alnasser T, Mornet S, Goglio G, Hadziioannou G. Hexagonal-to-cubic phase transformation in composite thin films induced by FePt nanoparticles located at PS/PEO interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14481-14488. [PMID: 22007622 DOI: 10.1021/la2036983] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The organization process of asymmetric poly(styrene-block-ethylene oxide) (PS-b-PEO) copolymer thin films blended with FePt nanoparticles is studied. In a first step, it is shown that FePt nanoparticles stabilized by oleic acid ligands are distributed within the PS matrix phase, whereas the same particles partially covered with short dopamine-terminated-methoxy poly(ethylene oxide) (mPEO-Dopa) are located at PS/PEO interfaces. The swelling of PS domains, induced by FePt_oleic acid nanoparticles during the solvent annealing process, results in formation of a disordered microstructure in comparison to the well-organized hexagonally close-packed (HCP) cylinder phase formed in the neat PS-b-PEO copolymer. The evolution of the microstructure of PS-b-PEO/FePt_mPEO-Dopa composite has been investigated for different solvent annealing treatments. Under high-humidity conditions during the vapor annealing process, the addition of FePt nanoparticles results in formation of spheres in the film split into terraces. The upper and lower terraces are occupied by spheres organized in an unusual square and HCP phases, respectively. Under low-humidity conditions, undulated PEO cylinders oriented parallel to substrate are formed in the presence of FePt nanoparticles. In this case, we observe that most of the nanoparticles accumulate within the core of topological defects, which induces a low nanoparticle concentration at the PS/PEO interfaces and so stabilizes an intermediate undulated cylinder phase.
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Affiliation(s)
- Karim Aissou
- Laboratoire de Chimie des Polymères Organiques (LCPO), CNRS - ENSCPB - Université de Bordeaux , 16 Avenue Pey-Berland, F-33607 Pessac Cedex, France
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39
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Jang SG, Kim BJ, Hawker CJ, Kramer EJ. Bicontinuous Block Copolymer Morphologies Produced by Interfacially Active, Thermally Stable Nanoparticles. Macromolecules 2011. [DOI: 10.1021/ma201937z] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Se Gyu Jang
- Materials Research Laboratory,§Department of Materials, ∥Department of Chemistry and Biochemistry, and ⊥Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Bumjoon J. Kim
- Materials Research Laboratory,§Department of Materials, ∥Department of Chemistry and Biochemistry, and ⊥Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Craig J. Hawker
- Materials Research Laboratory,§Department of Materials, ∥Department of Chemistry and Biochemistry, and ⊥Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Edward J. Kramer
- Materials Research Laboratory,§Department of Materials, ∥Department of Chemistry and Biochemistry, and ⊥Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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40
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Yoo M, Kim S, Jang SG, Choi SH, Yang H, Kramer EJ, Lee WB, Kim BJ, Bang J. Controlling the Orientation of Block Copolymer Thin Films using Thermally-Stable Gold Nanoparticles with Tuned Surface Chemistry. Macromolecules 2011. [DOI: 10.1021/ma2019254] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Misang Yoo
- Department of Chemical and Biological Engineering, Korea University, Seoul 136-701, Republic of Korea
| | - Seyong Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul 136-701, Republic of Korea
| | - Se Gyu Jang
- Department of Materials and the Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Soo-Hyung Choi
- Department of Materials and the Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Hyunseung Yang
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Edward J. Kramer
- Department of Materials and the Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Won Bo Lee
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea
| | - Bumjoon J. Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Joona Bang
- Department of Chemical and Biological Engineering, Korea University, Seoul 136-701, Republic of Korea
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41
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Lauter V, Müller-Buschbaum P, Lauter H, Petry W. Morphology of thin nanocomposite films of asymmetric diblock copolymer and magnetite nanoparticles. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:254215. [PMID: 21654048 DOI: 10.1088/0953-8984/23/25/254215] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Thin self-assembled nanocomposite films of an asymmetric diblock copolymer and nanoparticles are fabricated. The morphologies of the films of the diblock copolymer poly(styrene-block-n-butyl methacrylate), P(Sd-b-BMA), with different volume fractions of large magnetite Fe(3)O(4) nanoparticles are studied before and after annealing. Neutron reflectometry reveals remarkable evidence that confining asymmetric copolymer to a limit of two layers forces the film, after the annealing, to form a mixed cylindrical-lamellar two-layer structure. This complex morphology is very stable and is preserved after the incorporation of nanoparticles up to 10% volume fraction. The other striking result is that the monodispersed nanoparticles with affinity to the polystyrene (PS) domain and with a size of 10 nm, which is close to the size of the PS chains, are assembled by the diblock copolymer matrix, so the distribution of the nanoparticles is reduced solely to the PS domain of the film. Our studies demonstrate that for asymmetric block copolymers in thin film geometry the self-assembly is strongly influenced by the interfacial and surface energies of the blocks and substrate.
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Affiliation(s)
- Valeria Lauter
- Spallation Neutron Source, Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA.
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42
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Kim J, Green PF. Directed Assembly of Nanoparticles in Block Copolymer Thin Films: Role of Defects. Macromolecules 2010. [DOI: 10.1021/ma101883w] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jenny Kim
- Department of Materials Science and Engineering and Department of Chemical Engineering, Applied Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Peter F. Green
- Department of Materials Science and Engineering and Department of Chemical Engineering, Applied Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
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43
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Ploshnik E, Salant A, Banin U, Shenhar R. Hierarchical surface patterns of nanorods obtained by co-assembly with block copolymers in ultrathin films. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:2774-2779. [PMID: 20414889 DOI: 10.1002/adma.201000573] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- Elina Ploshnik
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
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44
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Harirchian-Saei S, Wang MCP, Gates BD, Moffitt MG. Patterning block copolymer aggregates via Langmuir-Blodgett transfer to microcontact-printed substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:5998-6008. [PMID: 20334416 DOI: 10.1021/la904561b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We demonstrate a new strategy for producing hierarchical polymer nanostructures, which combines nanoscale self-assembly of amphiphilic block copolymers at the air-water interface with microscale templated assembly of the resulting aggregates on chemically patterned substrates. Aggregates are formed via interfacial self-assembly of 141k polystyrene-b-poly(ethylene oxide) (PS-b-PEO, MW = 141k, 11.4 wt % PEO) or a blend of 185k PS-b-PEO (MW = 185k, 18.9 wt % PEO) and PS-coated CdS nanoparticles to form strandlike copolymer or copolymer-nanoparticle aggregates. Using Langmuir-Blodgett (LB) techniques, the aggregates are then transferred to patterned substrates possessing alternating hydrophilic/hydrophobic stripes, obtained by microcontact printing octadecyltrichlorosilane (OTS) on glass. The aggregates are transferred under various conditions of surface pressure, orientation of the patterned substrate, and withdrawal speed. Templated assembly of aggregates into the hydrophilic substrate domains is achieved when the hydrophilic/hydrophobic stripes are oriented perpendicular to the water surface during LB transfer; this is explained by surface energy heterogeneities along the subphase-substrate contact line, which induce selective dewetting and concomitant monolayer rearrangement at the drying front. In contrast, parallel orientation of stripes results in nonselective transfer of the monolayer without registration to the underlying surface pattern. By studying the effect of surface pressure, we show that packing constraints imposed by compression of aggregates to high surface densities prevent the formation of patterned LB films that match the established periodicity of the OTS-patterned glass. As well, it is shown that efficient transfer of aggregates to the patterned glass requires slower substrate withdrawal speeds compared to transfer to unpatterned hydrophilic glass.
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Affiliation(s)
- Saman Harirchian-Saei
- Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, BC, V8W 3V6 Canada
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Abstract
Organic/inorganic nanohybrid materials have attracted particular scientific and technological interest because they combine the properties of the organic and the inorganic component. Inorganic nanoparticles exhibit interesting electrical, optical, magnetic and/or catalytic properties, which are related with their nano-scale dimensions. However, their high surface-to-volume ratio often induces agglomeration and leads to the loss of their attractive properties. Surface modification of the inorganic nano-objects with physically or chemically end-tethered polymer chains has been employed to overcome this problem. Covalent tethered polymer chains are realized by three different approaches: the “grafting to”, the “grafting from” and the “grafting through” method. This article reviews the synthesis of end-grafted polymer chains onto inorganic nanoparticles using “controlled/living” polymerization techniques, which allow control over the polymer characteristics and the grafting density of the end-tethered polymer chains.
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Affiliation(s)
- Demetra S. Achilleos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology–Hellas, P. O. Box 1527, 711 10 Heraklion, Crete, Greece; E-Mail: (D.S.A.)
- Department of Materials Science and Technology, University of Crete, P. O. Box 2208, 710 03 Heraklion, Crete, Greece
| | - Maria Vamvakaki
- Institute of Electronic Structure and Laser, Foundation for Research and Technology–Hellas, P. O. Box 1527, 711 10 Heraklion, Crete, Greece; E-Mail: (D.S.A.)
- Department of Materials Science and Technology, University of Crete, P. O. Box 2208, 710 03 Heraklion, Crete, Greece
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +30-2810-545019; Fax: +30-2810-391305
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Ploshnik E, Salant A, Banin U, Shenhar R. Co-assembly of block copolymers and nanorods in ultrathin films: effects of copolymer size and nanorod filling fraction. Phys Chem Chem Phys 2010; 12:11885-93. [DOI: 10.1039/c0cp00277a] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lu CH, Kuo SW, Chang WT, Chang FC. The Self-Assembled Structure of the Diblock Copolymer PCL-b-P4VP Transforms Upon Competitive Interactions with Octaphenol Polyhedral Oligomeric Silsesquioxane. Macromol Rapid Commun 2009; 30:2121-7. [DOI: 10.1002/marc.200900437] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Indexed: 11/06/2022]
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