1
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Yue B, Jia X, Baryshnikov GV, Jin X, Feng X, Lu Y, Luo M, Zhang M, Shen S, Ågren H, Zhu L. Photoexcitation‐Based Supramolecular Access to Full‐Scale Phase‐Diagram Structures through in situ Phase‐Volume Ratio Phototuning. Angew Chem Int Ed Engl 2022; 61:e202209777. [DOI: 10.1002/anie.202209777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Bingbing Yue
- School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai 200093 China
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Xiaoyong Jia
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
- Henan Center for Outstanding Overseas Scientists College of Chemistry and Chemical Engineering Henan University Kaifeng Henan 475004 China
| | - Glib V. Baryshnikov
- Laboratory of Organic Electronics Department of Science and Technology Linköping University 60174 Norrköping Sweden
| | - Xin Jin
- Institute of Lasers and Biophotonics School of Biomedical Engineering Wenzhou Medical University Wenzhou Zhejiang 325035 China
| | - Xicheng Feng
- School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai 200093 China
| | - Yunle Lu
- School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai 200093 China
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Mengkai Luo
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Man Zhang
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Shen Shen
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Hans Ågren
- Henan Center for Outstanding Overseas Scientists College of Chemistry and Chemical Engineering Henan University Kaifeng Henan 475004 China
- Department of Physics and Astronomy Uppsala University 75120 Uppsala Sweden
| | - Liangliang Zhu
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
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2
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Li M, Li ZW, Lyu Q, Peng B, Zhong R, Zhao M, Xiong B, Yi GR, Zhang L, Zhu J. Structure-Tunable Construction of Colloidal Photonic Composites via Kinetically Controlled Supramolecular Crosslinking. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miaomiao Li
- Key Lab of Material Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Zhan-Wei Li
- State Key Lab of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Quanqian Lyu
- Key Lab of Material Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Bolun Peng
- Key Lab of Material Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Rui Zhong
- Key Lab of Material Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Meiru Zhao
- Key Lab of Material Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Bijin Xiong
- Key Lab of Material Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Gi-Ra Yi
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Lianbin Zhang
- Key Lab of Material Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Jintao Zhu
- Key Lab of Material Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
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3
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Yue B, Jia X, Baryshnikov GV, Jin X, Feng X, Lu Y, Luo M, Zhang M, Shen S, Ågren H, Zhu L. Photoexcitation‐based Supramolecular Access to Full‐scale Phase‐diagram Structures through in situ Phase‐volume Ratio Phototuning. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bingbing Yue
- Fudan University Department of Macromolecular Science CHINA
| | - Xiaoyong Jia
- Fudan University Department of Macromolecular Science CHINA
| | | | - Xin Jin
- Wenzhou Medical College - Chashan Campus: Wenzhou Medical University School of Biomedical Engineering CHINA
| | - Xicheng Feng
- USST: University of Shanghai for Science and Technology School of Materials and Chemistry CHINA
| | - Yunle Lu
- Fudan University Department of Macromolecular Science CHINA
| | - Mengkai Luo
- Fudan University Department of Macromolecular Science CHINA
| | - Man Zhang
- Fudan University Department of Macromolecular Science CHINA
| | - Shen Shen
- Fudan University Department of Macromolecular Science CHINA
| | - Hans Ågren
- Uppsala Universitet Department of Physics and Astronomy Roslagstullsbacken 15 10691 Stockholm SWEDEN
| | - Liangliang Zhu
- Fudan University Department of Macromolecular Science 220 Handan RoadYangpu District 200433 Shanghai CHINA
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4
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Hou C, Gao L, Wang Y, Yan LT. Entropic control of nanoparticle self-assembly through confinement. NANOSCALE HORIZONS 2022; 7:1016-1028. [PMID: 35762392 DOI: 10.1039/d2nh00156j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Entropy can be the sole driving force for the construction and regulation of ordered structures of soft matter systems. Specifically, under confinement, the entropic penalty could induce enhanced entropic effects which potentially generate visually ordered structures. Therefore, spatial confinement or a crowding environment offers an important approach to control entropy effects in these systems. Here, we review how spatial confinement-mediated entropic effects accurately and even dynamically control the self-assembly of nanoscale objects into ordered structures, focusing on our efforts towards computer simulations and theoretical analysis. First, we introduce the basic principle of entropic ordering through confinement. We then introduce the applications of this concept to various systems containing nanoparticles, including polymer nanocomposites, biological macromolecular systems and macromolecular colloids. Finally, the future directions and challenges for tailoring nanoparticle organization through spatial confinement-mediated entropic effects are detailed. We expect that this review could stimulate further efforts in the fundamental research on the relationship between confinement and entropy and in the applications of this concept for designer nanomaterials.
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Affiliation(s)
- Cuiling Hou
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China.
| | - Lijuan Gao
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China.
| | - Yuming Wang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China.
| | - Li-Tang Yan
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China.
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5
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Abstract
Polymers under confinement exhibit different structures and properties from the bulk. While block copolymers (BCPs) create well-defined micelles in solution, two-dimensional (2D) spatial confinement at the air-water interface constrains the chain conformations and deforms the micellar structure, thus forming a surface micelle. The BCP surface micelles open up an opportunity in nanoscience and engineering by serving as an interfacial modifier and structural platform. Nevertheless, a scaling law, a principle governing the micellar structure, is absent. Herein, we report a unified scaling relation to describe the combinational structure of BCP surface micelles in two and three dimensions and further reveal their formation mechanism in line with the suggested scaling relation. We investigated the intrinsic scaling relations in a surface pressure-free environment by introducing a concept of excluded volume-dependent scaling exponent based on the scaling theory of 2D polymers. In addition, an extrinsic scaling relation is derived for the surface pressure-dependent corona scaling.
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Affiliation(s)
- Dong Hyup Kim
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - So Youn Kim
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
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6
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Ogbonna N, Dearman M, Cho CT, Bharti B, Peters AJ, Lawrence J. Topologically Precise and Discrete Bottlebrush Polymers: Synthesis, Characterization, and Structure-Property Relationships. JACS AU 2022; 2:898-905. [PMID: 35557765 PMCID: PMC9088296 DOI: 10.1021/jacsau.2c00010] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 05/17/2023]
Abstract
As the complexity of polymer structure grows, so do the challenges for developing an accurate understanding of their structure-property relationships. Here, the synthesis of bottlebrush polymers with topologically precise and fully discrete structures is reported. A key feature of the strategy is the synthesis of discrete macromonomer libraries for their polymerization into topologically precise bottlebrushes that can be separated into discrete bottlebrushes (Đ = 1.0). As the system becomes more discrete, packing efficiency increases, distinct three-phase Langmuir-Blodgett isotherms are observed, and its glass transition temperature becomes responsive to side-chain sequence. Overall, this work presents a versatile strategy to access a range of precision bottlebrush polymers and unravels the impact of side-chain topology on their macroscopic properties. Precise control over side chains opens a pathway for tailoring polymer properties without changing their chemical makeup.
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Affiliation(s)
- Nduka
D. Ogbonna
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
| | - Michael Dearman
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
| | - Cheng-Ta Cho
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
| | - Bhuvnesh Bharti
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
| | - Andrew J. Peters
- Department
of Chemical Engineering, Louisiana Tech
University, Ruston, Louisiana 71272, United States
| | - Jimmy Lawrence
- Department
of Chemical Engineering, Louisiana State
University, Baton
Rouge, Louisiana 70803, United States
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7
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Electrically Switchable Film Structure of Conjugated Polymer Composites. MATERIALS 2022; 15:ma15062219. [PMID: 35329669 PMCID: PMC8951423 DOI: 10.3390/ma15062219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/11/2022] [Accepted: 03/15/2022] [Indexed: 01/27/2023]
Abstract
Domains rich in different blend components phase-separate during deposition, creating a film morphology that determines the performance of active layers in organic electronics. However, morphological control either relies on additional fabrication steps or is limited to a small region where an external interaction is applied. Here, we show that different semiconductor-insulator polymer composites can be rapidly dip-coated with the film structure electrically switched between distinct morphologies during deposition guided by the meniscus formed between the stationary barrier and horizontally drawn solid substrate. Reversible and repeatable changes between the morphologies used in devices, e.g., lateral morphologies and stratified layers of semiconductors and insulators, or between phase-inverted droplet-like structures are manifested only for one polarity of the voltage applied across the meniscus as a rectangular pulse. This phenomenon points to a novel mechanism, related to voltage-induced doping and the doping-dependent solubility of the conjugated polymer, equivalent to an increased semiconductor content that controls the composite morphologies. This is effective only for the positively polarized substrate rather than the barrier, as the former entrains the nearby lower part of the coating solution that forms the final composite film. The mechanism, applied to the pristine semiconductor solution, results in an increased semiconductor deposition and 40-times higher film conductance.
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8
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9
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Lewoczko EM, Kelly MT, Kent EW, Zhao B. Effects of temperature on chaotropic anion-induced shape transitions of star molecular bottlebrushes with heterografted poly(ethylene oxide) and poly( N, N-dialkylaminoethyl methacrylate) side chains in acidic water. SOFT MATTER 2021; 17:6566-6579. [PMID: 34151928 DOI: 10.1039/d1sm00728a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This article reports a study of the effects of temperature on chaotropic anion (CA)-induced star-globule shape transitions in acidic water of three-arm star bottlebrushes composed of heterografted poly(ethylene oxide) (PEO) and either poly(2-(N,N-dimethylamino)ethyl methacrylate) (PDMAEMA) or poly(2-(N,N-diethylamino)ethyl methacrylate) (PDEAEMA) (the brushes denoted as SMB-11 and -22, respectively). The brush polymers were synthesized by grafting alkyne-end-functionalized PEO and PDMAEMA or PDEAEMA onto an azide-bearing three-arm star backbone polymer using the copper(i)-catalyzed alkyne-azide cycloaddition reaction. Six anions were studied for their effects on the conformations of SMB-11 and -22 in acidic water: super CAs [Fe(CN)6]3- and [Fe(CN)6]4-, moderate CAs PF6- and ClO4-, weak CA I-, and for comparison, kosmotropic anion SO42-. At 25 °C, the addition of super and moderate CAs induced shape transitions of SMB-11 and -22 in pH 4.50 water from a starlike to a collapsed globular state stabilized by PEO side chains, which was driven by the ion pairing of protonated tertiary amine groups with CAs and the chaotropic effect. The shape changes occurred at much lower salt concentrations for super CAs than moderate CAs. Upon heating from near room temperature to 70 °C, the super CA-collapsed brushes remained in the globular state, whereas the moderate CA-collapsed brushes underwent reversible globule-to-star shape transitions. The transition temperature increased with increasing salt concentration and was found to be higher for SMB-22 at the same salt concentration, presumably caused by the chaotropic effect. In contrast, I- and SO42- had small effects on the conformations of SMB-11 and -22 at 25 °C in the studied salt concentration range, and only small and gradual size variations were observed upon heating to 70 °C. The results reported here may have potential uses in the design of stimuli-responsive systems for substance encapsulation and release.
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Affiliation(s)
- Evan M Lewoczko
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Michael T Kelly
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Ethan W Kent
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA.
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10
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Affiliation(s)
- Ning Ren
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Chunyang Yu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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11
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Rahimi M, Charmi G, Matyjaszewski K, Banquy X, Pietrasik J. Recent developments in natural and synthetic polymeric drug delivery systems used for the treatment of osteoarthritis. Acta Biomater 2021; 123:31-50. [PMID: 33444800 DOI: 10.1016/j.actbio.2021.01.003] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/15/2020] [Accepted: 01/05/2021] [Indexed: 12/11/2022]
Abstract
Osteoarthritis (OA), is a common musculoskeletal disorder that will progressively increase in older populations and is expected to be the most dominant cause of disability in the world population by 2030. The progression of OA is controlled by a multi-factorial pathway that has not been completely elucidated and understood yet. However, over the years, research efforts have provided a significant understanding of some of the processes contributing to the progression of OA. Both cartilage and bone degradation processes induce articular cells to produce inflammatory mediators that produce proinflammatory cytokines that block the synthesis of collagen type II and aggrecan, the major components of cartilage. Systemic administration and intraarticular injection of anti-inflammatory agents are the first-line treatments of OA. However, small anti-inflammatory molecules are rapidly cleared from the joint cavity which limits their therapeutic efficacy. To palliate this strong technological drawback, different types of polymeric materials such as microparticles, nanoparticles, and hydrogels, have been examined as drug carriers for the delivery of therapeutic agents to articular joints. The main purpose of this review is to provide a summary of recent developments in natural and synthetic polymeric drug delivery systems for the delivery of anti-inflammatory agents to arthritic joints. Furthermore, this review provides an overview of the design rules that have been proposed so far for the development of drug carriers used in OA therapy. Overall it is difficult to state clearly which polymeric platform is the most efficient one because many advantages and disadvantages could be pointed to both natural and synthetic formulations. That requires further research in the near future.
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12
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Lee HK, Koh CS, Lo WS, Liu Y, Phang IY, Sim HY, Lee YH, Phan-Quang GC, Han X, Tsung CK, Ling XY. Applying a Nanoparticle@MOF Interface To Activate an Unconventional Regioselectivity of an Inert Reaction at Ambient Conditions. J Am Chem Soc 2020; 142:11521-11527. [PMID: 32508093 DOI: 10.1021/jacs.0c04144] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Here we design an interface between a metal nanoparticle (NP) and a metal-organic framework (MOF) to activate an inert CO2 carboxylation reaction and in situ monitor its unconventional regioselectivity at the molecular level. Using a Kolbe-Schmitt reaction as model, our strategy exploits the NP@MOF interface to create a pseudo high-pressure CO2 microenvironment over the phenolic substrate to drive its direct C-H carboxylation at ambient conditions. Conversely, Kolbe-Schmitt reactions usually demand high reaction temperature (>125 °C) and pressure (>80 atm). Notably, we observe an unprecedented CO2 meta-carboxylation of an arene that was previously deemed impossible in traditional Kolbe-Schmitt reactions. While the phenolic substrate in this study is fixed at the NP@MOF interface to facilitate spectroscopic investigations, free reactants could be activated the same way by the local pressurized CO2 microenvironment. These valuable insights create enormous opportunities in diverse applications including synthetic chemistry, gas valorization, and greenhouse gas remediation.
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Affiliation(s)
- Hiang Kwee Lee
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Charlynn Sher Koh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Wei-Shang Lo
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yejing Liu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - In Yee Phang
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634
| | - Howard Yi Sim
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Yih Hong Lee
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Gia Chuong Phan-Quang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Xuemei Han
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Chia-Kuang Tsung
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Xing Yi Ling
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
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13
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Wessels MG, Jayaraman A. Self-assembly of amphiphilic polymers of varying architectures near attractive surfaces. SOFT MATTER 2020; 16:623-633. [PMID: 31808757 DOI: 10.1039/c9sm02104c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We use coarse-grained molecular dynamics simulations to investigate the assembly of A-B amphiphilic polymers near/on surfaces as a function of polymer architecture and surface attraction to the solvophobic B-block in the polymer. We study four polymer architectures: linear, bottlebrush with a backbone that is longer than each of the side chains, bottlebrush where the solvophobic backbone is similar in length to each of the side chains, and 'star-like' architectures where the backbone is significantly shorter than the side chain lengths. For each architecture and surface-B attraction, we quantify the assembled aggregate structure (i.e., aggregation number, domain shapes and sizes) and the chain conformations (i.e., components of the chain radius of gyration) on and away from the surface. For all the architectures and surface-B attraction strengths, the assembled structure away from the surface is similar to the assembly observed in bulk systems without surfaces. Near/on the surface, the assembled B-blocks form domains whose shapes and sizes are dependent on the surface-B attraction strength and the ability of the B-block in the polymer architecture to change conformations and pack on the surface. Domain sizes formed from linear and 'star-like' polymer architectures show the highest sensitivity to surface-B-block attraction strength, transitioning from hemispherical to disordered domains with increasing attraction strength. In contrast, bottlebrushes with long backbones and short side chains transition from hemispherical to striped to continuous domains with increasing surface-B attraction strength. Bottlebrushes with similar solvophobic backbone and side chain lengths form hemispherical domains that do not change significantly with the surface-B-block attraction strength. These computational results can guide experimentalists in their choices of surface chemistry and polymer architecture to achieve desired assembled domain shapes and sizes on the surface.
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Affiliation(s)
- Michiel G Wessels
- Colburn Laboratory, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA.
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14
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Sunday DF, Martin TB, Chang AB, Burns AB, Grubbs RH. Addressing the challenges of modeling the scattering from bottlebrush polymers in solution. JOURNAL OF POLYMER SCIENCE 2020; 58:10.1002/pol.20190289. [PMID: 33305292 PMCID: PMC7724922 DOI: 10.1002/pol.20190289] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 02/02/2020] [Indexed: 12/17/2022]
Abstract
Small-angle scattering measurements of complex macromolecules in solution are used to establish relationships between chemical structure and conformational properties. Interpretation of the scattering data requires an inverse approach where a model is chosen and the simulated scattering intensity from that model is iterated to match the experimental scattering intensity. This raises challenges in the case where the model is an imperfect approximation of the underlying structure, or where there are significant correlations between model parameters. We examine three bottlebrush polymers (consisting of polynorbornene backbone and polystyrene side chains) in a good solvent using a model commonly applied to this class of polymers: the flexible cylinder model. Applying a series of constrained Monte-Carlo Markov Chain analyses demonstrates the severity of the correlations between key parameters and the presence of multiple close minima in the goodness of fit space. We demonstrate that a shape-agnostic model can fit the scattering with significantly reduced parameter correlations and less potential for complex, multimodal parameter spaces. We provide recommendations to improve the analysis of complex macromolecules in solution, highlighting the value of Bayesian methods. This approach provides richer information for understanding parameter sensitivity compared to methods which produce a single, best fit.
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Affiliation(s)
- Daniel F. Sunday
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland
| | - Tyler B. Martin
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland
| | - Alice B. Chang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
| | - Adam B. Burns
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland
| | - Robert H. Grubbs
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
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15
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Dai X, Chen P, Zhu G, Xu Z, Zhang X, Yan LT. Entropy-Mediated Mechanomutable Microstructures and Mechanoresponsive Thermal Transport of Nanoparticle Self-Assembly in Block Copolymers. J Phys Chem Lett 2019; 10:7970-7979. [PMID: 31802675 DOI: 10.1021/acs.jpclett.9b03253] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Despite decades of intense research efforts on the self-assembly of nanoparticles in mesophase-forming copolymers, the progress in practical applications is impeded by the lack of knowledge about the dynamic transition of such hierarchical nanostructures in an environment bearing an external load. Here, we show that the hierarchical self-assembly of nanoparticles in block copolymer scaffolds can be made to significantly alternate by external compression, characterized by a continuous and reverse transition among various distribution states of nanoparticles in their preferential domains. Theoretical analysis reveals that compression-induced transition of the nanoparticle distribution can be fundamentally attributed to unique entropic effects originating from the compacted block chains. Further, we demonstrate that the hierarchical nanostructures with different distribution states of nanoparticles can lead to mechanomutable phonon transport properties. The findings reveal the mechanoresponsive behaviors of the hierarchical nanostructures of block copolymer-based nanocomposites and their potential applications as thermal interface materials with tailored thermal conductivity.
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Affiliation(s)
- Xiaobin Dai
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Pengyu Chen
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Guolong Zhu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Ziyang Xu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Xinghua Zhang
- School of Science , Beijing Jiaotong University , Beijing 100044 , China
| | - Li-Tang Yan
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
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16
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Xu Z, Zhu G, Chen P, Dai X, Yan LT. Optimal ligand-receptor binding for highly efficient capture of vesicles in nanofluidic transportation. NANOSCALE 2019; 11:22305-22315. [PMID: 31746900 DOI: 10.1039/c9nr07337j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Optimizing ligand-receptor binding is essential for exploiting advanced biomedical applications from targeting drug delivery to biosensing. A key challenge is how optimized ligand-receptor binding can be realized during the transport of ligand-modified soft materials through a nanofluidic channel. Here, by combining computer simulations and theoretical analysis, we report that the ligand-receptor binding and resulting capture probability of ligand-functionalized vesicles nonmonotonically depend on their some intrinsic properties, e.g., chain stiffness and vesicle rigidity, during their transport through a nanochannel with imposed Poiseuille flow. Particularly, we find that the systems with semiflexible ligand and receptor chains possess the optimal ligand-receptor binding and capture probability. An analytical model of the blob theory is developed to capture the simulation results quantitatively, leading to a mechanistic interpretation of the optimal vesicle capture based on the conformational-entropy effect. Examination of the detailed dynamics reveals the active rearrangement of ligand-receptor binding during the transport process. Furthermore, the hairy vesicle with moderate rigidity is found to display an enhanced capture probability superior to that of both its soft and hard counterparts, which is rationalized by the faster and more periodic tumbling motion of the semi-rigid vesicle. Our findings highlight that precise control of the intrinsic properties of ligands and receptors as well as the vesicle rigidity can be a versatile strategy in optimizing the ligand-receptor binding in nanofluidic transportation towards advantageous biomedical applications.
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Affiliation(s)
- Ziyang Xu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China.
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17
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Chen S, Yong X. Janus Nanoparticles Enable Entropy-Driven Mixing of Bicomponent Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14840-14848. [PMID: 31657936 DOI: 10.1021/acs.langmuir.9b02012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Mixing incompatible polymers in water to form homogeneous hydrogels possessing both hydrophilic and lipophilic components is challenging due to high enthalpic penalty and negligible entropic gain in total Gibbs free energy. Here we performed dissipative particle dynamics simulations and machine learning to uncover the influence of Janus nanoparticles on immiscible polymer mixtures with high water content and to predict the phase behavior of bicomponent hydrogels. An intriguing transition from kinetically arrested demixing to spontaneous mixing was observed with increasing particle concentration and decreasing particle size. The analysis reveals that the mixing is driven by a significant entropic gain of small nanoparticles being well dispersed in aqueous solvent of high-volume fraction. This finding highlights an entropy-driven mixing mechanism for nanocomposite bicomponent hydrogels. Supervised machine learning algorithms were used to establish a microstructure phase diagram with respect to particle concentration and radius, in which homogeneous, percolated, clustered, and separated phases, as well as corresponding phase boundaries, were clearly identified.
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Affiliation(s)
- Shensheng Chen
- Department of Mechanical Engineering , Binghamton University, The State University of New York , Binghamton , New York 13902 , United States
| | - Xin Yong
- Department of Mechanical Engineering , Binghamton University, The State University of New York , Binghamton , New York 13902 , United States
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18
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Kent EW, Zhao B. Stimuli-Induced Star-Globule Shape Transitions of Dually Responsive Binary Heterografted Three-Arm Star Molecular Brushes in Aqueous Solution. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01446] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Ethan W. Kent
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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19
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Wessels MG, Jayaraman A. Molecular dynamics simulation study of linear, bottlebrush, and star-like amphiphilic block polymer assembly in solution. SOFT MATTER 2019; 15:3987-3998. [PMID: 31025695 DOI: 10.1039/c9sm00375d] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study we investigate the effect of varying branched polymer architectures on the assembly of amphiphilic block polymers in solution using coarse-grained molecular dynamics simulations. We quantify assembly structure (e.g., aggregation number, assembly morphology, and micelle core size) and thermodynamics (e.g., unimer to micelle transition conditions) as a function of increasing solvophobicity of the solvophobic block in the copolymer for three broad categories of polymer architectures: linear, 'bottlebrush' (with many short side chains on a long backbone), and 'star-like' (with few long side chains on a short backbone). Keeping the total number of coarse-grained beads in each polymer (or polymer molecular weight) constant, as we go from either linear or 'star-like' to 'bottlebrush' polymer architectures, the micelle aggregation number and micelle core size decrease, and the solvophobicity required for assembly (i.e., transition solvophobicity) increases. This trend is linked to the topological/steric hinderance for making solvophobic bead contacts between neighboring polymers for the 'bottlebrush' polymer architecture compared to the linear or 'star-like' architectures. We are able to identify some universal trends in assembly by plotting the assembly structure and thermodynamics data as a function of branching parameter defined as the ratio of the branched chain to the linear chain radius of gyration in the unimer state, and the relative lengths of the backbone versus side chain. The results in this paper guide how one could manipulate the amphiphilic block polymer assembly structure and thermodynamics by choosing appropriate polymer architecture, block sequence, and composition.
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Affiliation(s)
- Michiel G Wessels
- Colburn Laboratory, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA.
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20
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Garle AL, Budhlall BM. PEG Bottle Brush Copolymers as Antimicrobial Mimics: Role of Entropic Templating in Membrane Lysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3372-3382. [PMID: 30646685 DOI: 10.1021/acs.langmuir.8b00756] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Novel polymers containing quaternary functional groups, with and without (control copolymer) PEG side chains, were synthesized and characterized for their ability to lyse the phospholipid membranes of liposome vesicles. Calcein loaded unilamellar vesicles composed of 1,2-dioleoyl- sn-glycero-3-phosphatidylcholine (DOPC) were used to mimic red-blood cell membranes, and a 80:20 (mol/mol) mixture of 1,2-dioleoyl- sn-glycero-3-phosphatidyl ethanolamine (DOPE) and 1,2-dioleoyl- sn- glycero-3-[phospho- rac-(1-glycerol)] (DOPG) was used to mimic the outer cell-membrane of the gram-negative bacteria, E. coli. For DOPE/DOPG = 80:20 (mol/mol) liposome vesicles, the PEG bottle brush copolymer caused leakage of the encapsulated Calcein dye, whereas the control copolymer did not cause any leakage. Both the bottle brush copolymer and the copolymer without PEG side chains had no effect on the zwitterionic DOPC liposome vesicles indicating that the RBC membrane composition is not disrupted by either copolymer architecture. The PEG bottle brush copolymer did not affect the colloidal size of the DOPE/DOPG = 80:20 (mol/mol) liposome vesicles, but on the addition of Triton-X 100, the vesicles disappeared. This provided evidence that the dye leakage was caused by compromising the integrity of the vesicle membrane by the bottle brush polymer architecture. Such partial disruption was preceded by the entropic templating of lipid membranes by the PEG side chains of the bottle brush copolymer. By careful comparison with non-PEGylated cationic polymers, Quart, the importance of PEG side chains in the membrane disrupting activity of the PEGylated cationic polymer, QPEG, was demonstrated. This finding itself is interesting and can contribute to the expansion of the design of membrane disrupting materials.
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Affiliation(s)
- Amit L Garle
- Department of Plastics Engineering and Nanomanufacturing Center , 1 University Drive, University of Massachusetts Lowell , Lowell , Massachusetts 01854 . United States
- Mayo Clinic , Department of Endocrinology , 200 1st Street , Rochester , Minnesota 55902 . United States
| | - Bridgette M Budhlall
- Department of Plastics Engineering and Nanomanufacturing Center , 1 University Drive, University of Massachusetts Lowell , Lowell , Massachusetts 01854 . United States
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21
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Xie G, Martinez MR, Olszewski M, Sheiko SS, Matyjaszewski K. Molecular Bottlebrushes as Novel Materials. Biomacromolecules 2018; 20:27-54. [DOI: 10.1021/acs.biomac.8b01171] [Citation(s) in RCA: 168] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Guojun Xie
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Michael R. Martinez
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Mateusz Olszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Sergei S. Sheiko
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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22
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Borodinov N, Belianinov A, Chang D, Carrillo JM, Burch MJ, Xu Y, Hong K, Ievlev AV, Sumpter BG, Ovchinnikova OS. Molecular reorganization in bulk bottlebrush polymers: direct observation via nanoscale imaging. NANOSCALE 2018; 10:18001-18009. [PMID: 30226257 DOI: 10.1039/c8nr05630g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bottlebrush polymers are important for a variety of applications ranging from drug delivery to electronics. The functional flexibility of the branched sidechains has unique assembly properties when compared to linear block polymer systems. However, reports of direct observation of molecular reorganization have been sparse. This information is necessary to enhance the understanding of the structure-property relationships in these systems and yield a rational design approach for novel polymeric materials. In this work, we report direct visualization of bottlebrush molecular organization and the formation of nematic-type ordering in an amorphous polymer bottlebrush system, captured with plasma etching and helium ion microscopy. By observing the unperturbed structure of this material at high resolution and quantifying image features, we were able to qualitatively link experimental results with structures predicted by coarse-grained molecular dynamics simulations. The direct visualization and computation workflow developed in this work can be applied to a broad variety of polymers with different architectures, linking imaging results with other, independent channels of information for better understanding and control of these classes of materials.
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Affiliation(s)
- Nikolay Borodinov
- Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
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23
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Lyubimov I, Wessels MG, Jayaraman A. Molecular Dynamics Simulation and PRISM Theory Study of Assembly in Solutions of Amphiphilic Bottlebrush Block Copolymers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01535] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ivan Lyubimov
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
| | - Michiel G. Wessels
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
| | - Arthi Jayaraman
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
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24
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Yang Y, Chen P, Cao Y, Huang Z, Zhu G, Xu Z, Dai X, Chen S, Miao B, Yan LT. How Implementation of Entropy in Driving Structural Ordering of Nanoparticles Relates to Assembly Kinetics: Insight into Reaction-Induced Interfacial Assembly of Janus Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9477-9488. [PMID: 30016871 DOI: 10.1021/acs.langmuir.8b01378] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The ability to understand and exploit entropic contributions to ordering transition is of essential importance in the design of self-assembling systems with well-controlled structures. However, much less is known about the role of assembly kinetics in entropy-driven phase behaviors. Here, by combining computer simulations and theoretical analysis, we report that the implementation of entropy in driving phase transition significantly depends on the kinetic process in the reaction-induced self-assembly of newly designed nanoparticle systems. In particular, such systems comprise binary Janus nanoparticles at the fluid-fluid interface and undergo phase transition driven by entropy and controlled by the polymerization reaction initiated from the surfaces of just one component of nanoparticles. Our simulations demonstrate that the competition between the reaction rate and the diffusive dynamics of nanoparticles governs the implementation of entropy in driving the phase transition from randomly mixed phase to intercalated phase in these interfacial nanoparticle mixtures, which thereby results in diverse kinetic pathways. At low reaction rates, the transition exhibits abrupt jump in the mixing parameter, in a similar way to first-order, equilibrium phase transition. Increasing the reaction rate diminishes the jumps until the transitions become continuous, behaving as a second-order-like phase transition, where a critical exponent, characterizing the transition, can be identified. We finally develop an analytical model of the blob theory of polymer chains to complement the simulation results and reveal essential scaling laws of the entropy-driven phase behaviors. In effect, our results allow for further opportunities to amplify the entropic contributions to the materials design via kinetic control.
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Affiliation(s)
- Ye Yang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Pengyu Chen
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Yufei Cao
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Zihan Huang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Guolong Zhu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Ziyang Xu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Xiaobin Dai
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Shi Chen
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Bing Miao
- College of Materials Science and Opto-Electronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Li-Tang Yan
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
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25
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Mah AH, Afzali P, Qi L, Pesek S, Verduzco R, Stein GE. Bottlebrush Copolymer Additives for Immiscible Polymer Blends. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00719] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | - Luqing Qi
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77006, United States
| | - Stacy Pesek
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77006, United States
| | - Rafael Verduzco
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77006, United States
| | - Gila E. Stein
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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26
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Zhu G, Huang Z, Xu Z, Yan LT. Tailoring Interfacial Nanoparticle Organization through Entropy. Acc Chem Res 2018; 51:900-909. [PMID: 29589915 DOI: 10.1021/acs.accounts.8b00001] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The ability to tailor the interfacial behaviors of nanoparticles (NPs) is crucial not only for the design of novel nanostructured materials with superior properties and of interest for many promising applications such as water purification, enhanced oil recovery, and innovative energy transduction, but also for a better insight into many biological systems where nanoscale particles such as proteins or viruses can interact and organize at certain interfaces. As a class of emerging building blocks, Janus NPs consisting of two compartments of different chemistry or polarity are ideal candidates to generate tunable and stable interfacial nanostructures because of the asymmetric nature. However, precise control over such interfacial nanostructures toward a controllable order and even responses to various external stimuli still remains a great challenge as the interfaces do not simply serve as a scaffold but rather induce complex enthalpic and entropic interactions. In this Account, we focus on our efforts on exploiting entropy strategies based on computational design to tailor the spatial distribution and ordering of NPs at the interfaces of various systems. First, we introduce the physical principle of entropic ordering, being the theoretical basis of entropy-directed interfacial self-assembly. The typical types of entropy, which have been harnessed to manipulate the interfacial NP organization, are then summarized, including conformational entropy, shape entropy, and rotational and vibrational entropy. Next, we describe the emerging pathways in the development of novel environmentally responsive systems which involve the use of entropy to access the stimuli-responsive behaviors of interfacial nanostructures. Taking one step further, how molecular architectures can be tailored to tune the entropic contributions to the interfacial self-assembly is demonstrated, through identifying the effects of various intrinsic properties of block segments, such as chain length and stiffness, on entropy-governed precise organization of Janus NPs at block copolymer interfaces. Finally, we detail some key factors for tailoring interfacial organization through entropy. In summary, entropy strategies offer a promising and abundant framework for precisely programming the structural organization of NPs at interfaces. We discuss future directions to signify the framework in tailoring the interfacial organization of NPs. We hope that this Account will promote further efforts toward fundamental research and the wide applications of designed interfacial assemblies in new types of functional nanomaterials and beyond.
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Affiliation(s)
- Guolong Zhu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Zihan Huang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Ziyang Xu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Li-Tang Yan
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
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27
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Sun S, Guo M, Yi X, Zhang Z. Reaction-mediated entropic effect on phase separation in a binary polymer system. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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28
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Lee HK, Lee YH, Morabito JV, Liu Y, Koh CSL, Phang IY, Pedireddy S, Han X, Chou LY, Tsung CK, Ling XY. Driving CO2 to a Quasi-Condensed Phase at the Interface between a Nanoparticle Surface and a Metal–Organic Framework at 1 bar and 298 K. J Am Chem Soc 2017; 139:11513-11518. [DOI: 10.1021/jacs.7b04936] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiang Kwee Lee
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
- Institute
of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
| | - Yih Hong Lee
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Joseph V. Morabito
- Department
of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yejing Liu
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Charlynn Sher Lin Koh
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - In Yee Phang
- Institute
of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
| | - Srikanth Pedireddy
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Xuemei Han
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Lien-Yang Chou
- School
of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Chia-Kuang Tsung
- Department
of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Xing Yi Ling
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
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29
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Chen P, Yang Y, Dong B, Huang Z, Zhu G, Cao Y, Yan LT. Polymerization-Induced Interfacial Self-Assembly of Janus Nanoparticles in Block Copolymers: Reaction-Mediated Entropy Effects, Diffusion Dynamics, and Tailorable Micromechanical Behaviors. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Pengyu Chen
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Ye Yang
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Bojun Dong
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Zihan Huang
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Guolong Zhu
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Yufei Cao
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Li-Tang Yan
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
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30
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Henn DM, Fu W, Mei S, Li CY, Zhao B. Temperature-Induced Shape Changing of Thermosensitive Binary Heterografted Linear Molecular Brushes between Extended Wormlike and Stable Globular Conformations. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00150] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Daniel M. Henn
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Wenxin Fu
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Shan Mei
- Department
of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Christopher Y. Li
- Department
of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Bin Zhao
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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31
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Ferhan AR, Jackman JA, Cho NJ. Integration of Quartz Crystal Microbalance-Dissipation and Reflection-Mode Localized Surface Plasmon Resonance Sensors for Biomacromolecular Interaction Analysis. Anal Chem 2016; 88:12524-12531. [DOI: 10.1021/acs.analchem.6b04303] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Abdul Rahim Ferhan
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Joshua A. Jackman
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Nam-Joon Cho
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
- School
of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
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32
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Abstract
Current directions and emerging possibilities under investigation for the integration of synthetic and semi-synthetic multivalent architectures with biology are discussed. Attention is focussed around multivalent interactions, their fundamental role in biology, and current and potential approaches in emulating them in terms of structure and functionality using synthetic architectures.
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Affiliation(s)
- Eugene Mahon
- Conway Institute for Biomolecular and Biomedical Science, Belfield, Dublin 4, Ireland.
| | - Mihail Barboiu
- Adaptative Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM/UMII/UMR-CNRS 5635, Pl. Eugène Bataillon, CC 047, 34095 Montpellier, Cedex 5, France.
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33
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Affiliation(s)
- Markus Müllner
- School of Chemistry; Key Centre for Polymers and Colloids; The University of Sydney; Sydney NSW 2006 Australia
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34
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Huang Z, Lu C, Dong B, Xu G, Ji C, Zhao K, Yan LT. Chain stiffness regulates entropy-templated perfect mixing at single-nanoparticle level. NANOSCALE 2016; 8:1024-1032. [PMID: 26660086 DOI: 10.1039/c5nr06134b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The mixing on a single-particle level of chemically incompatible nanoparticles is an outstanding challenge for many applications. Burgeoning research activity suggests that entropic templating is a potential strategy to address this issue. Herein, using systematic computer simulations of model nanoparticle systems, we show that the entropy-templated interfacial organization of nanoparticles significantly depends on the stiffness of tethered chains. Unexpectedly, the optimal chain stiffness can be identified wherein a system exhibits the most perfect mixing for a certain compression ratio. Our simulations demonstrate that entropic templating regulated by chain stiffness precisely reflects various entropic repulsion states that arise from typical conformation regimes of semiflexible chains. The physical mechanism of the chain stiffness effect is revealed by analyzing the entropic repulsion states of tethered chains and quantitatively estimating the resulting entropy penalties, which provides direct evidence that supports the key role of entropic transition in the entropic templating strategy, as suggested in experiments. Moreover, the model nanoparticle systems are found to evolve into binary nanoparticle superlattices by remixing at extremely high stiffness. The findings facilitate the wide application of the entropic templating strategy in creating interfacially reactive nanomaterials with ordered structures on the single-nanoparticle level as well as mechanomutable responses.
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Affiliation(s)
- Zihan Huang
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China.
| | - Ce Lu
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China.
| | - Bojun Dong
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China.
| | - Guoxi Xu
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China.
| | - Chengcheng Ji
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China.
| | - Kongyin Zhao
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China.
| | - Li-Tang Yan
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China.
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Wang D, Hu R, Mabry JN, Miao B, Wu DT, Koynov K, Schwartz DK. Scaling of Polymer Dynamics at an Oil–Water Interface in Regimes Dominated by Viscous Drag and Desorption-Mediated Flights. J Am Chem Soc 2015; 137:12312-20. [DOI: 10.1021/jacs.5b07108] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dapeng Wang
- Department
of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Renfeng Hu
- Department
of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Joshua N. Mabry
- Department
of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Bing Miao
- College
of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - David T. Wu
- Department
of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Daniel K. Schwartz
- Department
of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
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36
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Dong B, Huang Z, Chen H, Yan LT. Chain-Stiffness-Induced Entropy Effects Mediate Interfacial Assembly of Janus Nanoparticles in Block Copolymers: From Interfacial Nanostructures to Optical Responses. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01290] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Bojun Dong
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Zihan Huang
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Honglin Chen
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Li-Tang Yan
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
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38
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Mixing of immiscible polymers using nanoporous coordination templates. Nat Commun 2015; 6:7473. [PMID: 26130294 PMCID: PMC4506999 DOI: 10.1038/ncomms8473] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 05/12/2015] [Indexed: 11/08/2022] Open
Abstract
The establishment of methodologies for the mixing of immiscible substances is highly desirable to facilitate the development of fundamental science and materials technology. Herein we describe a new protocol for the compatibilization of immiscible polymers at the molecular level using porous coordination polymers (PCPs) as removable templates. In this process, the typical immiscible polymer pair of polystyrene (PSt) and poly(methyl methacrylate) (PMMA) was prepared via the successive homopolymerizations of their monomers in a PCP to distribute the polymers inside the PCP particles. Subsequent dissolution of the PCP frameworks in a chelator solution affords a PSt/PMMA blend that is homogeneous in the range of several nanometers. Due to the unusual compatibilization, the thermal properties of the polymer blend are remarkably improved compared with the conventional solvent-cast blend. This method is also applicable to the compatibilization of PSt and polyacrylonitrile, which have very different solubility parameters.
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39
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Xu W, Ledin PA, Shevchenko VV, Tsukruk VV. Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12570-12596. [PMID: 26010902 DOI: 10.1021/acsami.5b01833] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Branched polyelectrolytes with cylindrical brush, dendritic, hyperbranched, grafted, and star architectures bearing ionizable functional groups possess complex and unique assembly behavior in solution at surfaces and interfaces as compared to their linear counterparts. This review summarizes the recent developments in the introduction of various architectures and understanding of the assembly behavior of branched polyelectrolytes with a focus on functional polyelectrolytes and poly(ionic liquid)s with responsive properties. The branched polyelectrolytes and poly(ionic liquid)s interact electrostatically with small molecules, linear polyelectrolytes, or other branched polyelectrolytes to form assemblies of hybrid nanoparticles, multilayer thin films, responsive microcapsules, and ion-conductive membranes. The branched structures lead to unconventional assemblies and complex hierarchical structures with responsive properties as summarized in this review. Finally, we discuss prospectives for emerging applications of branched polyelectrolytes and poly(ionic liquid)s for energy harvesting and storage, controlled delivery, chemical microreactors, adaptive surfaces, and ion-exchange membranes.
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Affiliation(s)
- Weinan Xu
- †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Petr A Ledin
- †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Valery V Shevchenko
- ‡Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, Kharkovskoe shosse 48, Kiev 02160, Ukraine
| | - Vladimir V Tsukruk
- †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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40
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Verduzco R, Li X, Pesek SL, Stein GE. Structure, function, self-assembly, and applications of bottlebrush copolymers. Chem Soc Rev 2015; 44:2405-20. [PMID: 25688538 DOI: 10.1039/c4cs00329b] [Citation(s) in RCA: 430] [Impact Index Per Article: 47.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Bottlebrush polymers are a type of branched or graft polymer with polymeric side-chains attached to a linear backbone, and the unusual architectures of bottlebrushes provide a number of unique and potentially useful properties. These include a high entanglement molecular weight, enabling rapid self-assembly of bottlebrush block copolymers into large domain structures, the self-assembly of bottlebrush block copolymer micelles in a selective solvent even at very low dilutions, and the functionalization of bottlebrush side-chains for recognition, imaging, or drug delivery in aqueous environments. This review article focuses on recent developments in the field of bottlebrush polymers with an emphasis on applications of bottlebrush copolymers. Bottlebrush copolymers contain two (or more) different types of polymeric side-chains. Recent work has explored the diverse properties and functions of bottlebrush polymers and copolymers in solutions, films, and melts, and applications explored include photonic materials, bottlebrush films for lithographic patterning, drug delivery, and tumor detection and imaging. We provide a brief introduction to bottlebrush synthesis and physical properties and then discuss work related to: (i) bottlebrush self-assembly in melts and bulk thin films, (ii) bottlebrushes for photonics and lithography, (iii) bottlebrushes for small molecule encapsulation and delivery in solution, and (iv) bottlebrush micelles and assemblies in solution. We briefly discuss three potential areas for future research, including developing a more quantitative model of bottlebrush self-assembly in the bulk, studying the properties of bottlebrushes at interfaces, and investigating the solution assembly of bottlebrush copolymers.
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Affiliation(s)
- Rafael Verduzco
- Department of Chemical and Biomolecular Engineering, William Marsh Rice University, 6100 Main Street, MS-362, Houston, TX 77005, USA.
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41
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Steinschulte AA, Xu W, Draber F, Hebbeker P, Jung A, Bogdanovski D, Schneider S, Tsukruk VV, Plamper FA. Interface-enforced complexation between copolymer blocks. SOFT MATTER 2015; 11:3559-3565. [PMID: 25807174 DOI: 10.1039/c5sm00242g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Binary diblock copolymers and corresponding ternary miktoarm stars are studied at oil-water interfaces. All polymers contain oil-soluble poly(propylene oxide) PPO, water-soluble poly(dimethylaminoethyl methacrylate) PDMAEMA and/or poly(ethylene oxide) PEO. The features of their Langmuir compression isotherms are well related to the ones of the corresponding homopolymers. Within the Langmuir-trough, PEO-b-PPO acts as the most effective amphiphile compared to the other PPO-containing copolymers. In contrast, the compression isotherms show a complexation of PPO and PDMAEMA for PPO-b-PDMAEMA and the star, reducing their overall amphiphilicity. Such complex formation between the blocks of PPO-b-PDMAEMA is prevented in bulk water but facilitated at the interface. The weakly-interacting blocks of PPO-b-PDMAEMA form a complex due to their enhanced proximity in such confined environments. Scanning force microscopy and Monte Carlo simulations with varying confinement support our results, which are regarded as compliant with the mathematical random walk theorem by Pólya. Finally, the results are expected to be of relevance for e.g. emulsion formulation and macromolecular engineering.
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42
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Xu W, Ledin PA, Iatridi Z, Tsitsilianis C, Tsukruk VV. Multiresponsive Star-Graft Quarterpolymer Monolayers. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00401] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Weinan Xu
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Petr A. Ledin
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Zacharoula Iatridi
- Department
of Chemical Engineering, University of Patras, 26504 Patras, Greece
- Institute of Chemical
Engineering Sciences (FORTH/ICE-HT), 26504 Patras, Greece
| | - Constantinos Tsitsilianis
- Department
of Chemical Engineering, University of Patras, 26504 Patras, Greece
- Institute of Chemical
Engineering Sciences (FORTH/ICE-HT), 26504 Patras, Greece
| | - Vladimir V. Tsukruk
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
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43
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Cramer AD, Gambinossi F, Wischerhoff E, Laschewsky A, Miller R, Ferri JK. Flexible thermoresponsive nanomembranes at the aqueous–air interface. Chem Commun (Camb) 2015; 51:877-80. [DOI: 10.1039/c4cc07359b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Thermoresponsive freestanding nanomembranes were grown by surface-initiated polymerization at the aqueous–air interface of a pendant drop. We demonstrate formation of liquid-like interfaces supporting anisotropic stress and mechanical flexibility.
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Affiliation(s)
- Ashley D. Cramer
- Lafayette College
- Department of Chemical and Biomolecular Engineering
- Easton
- USA
| | - Filippo Gambinossi
- Lafayette College
- Department of Chemical and Biomolecular Engineering
- Easton
- USA
| | - Erik Wischerhoff
- Fraunhofer Institute for Applied Polymer Research
- D-14476 Potsdam-Golm
- Germany
| | - André Laschewsky
- Fraunhofer Institute for Applied Polymer Research
- D-14476 Potsdam-Golm
- Germany
- University of Potsdam
- Institute of Chemistry
| | - Reinhard Miller
- Max Planck Institute of Colloids and Interfaces
- D-14424 Potsdam/Golm
- Germany
| | - James K. Ferri
- Lafayette College
- Department of Chemical and Biomolecular Engineering
- Easton
- USA
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44
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Liu Z, Guo R, Xu G, Huang Z, Yan LT. Entropy-mediated mechanical response of the interfacial nanoparticle patterning. NANO LETTERS 2014; 14:6910-6916. [PMID: 25375409 DOI: 10.1021/nl5029396] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The precise organization of nano-objects into well-defined patterns at interfaces is an outstanding challenge in the field of nanocomposites toward technologically important materials and devices. Herein, by means of computer simulations we show novel mechanomutable nanocomposites designed by binary mixtures of tethered Janus nanoparticles at the interface of a binary fluid mixture under mechanical pressure. Our simulations demonstrate that the nanoparticle organization in the systems undergo reversible transition between random state and long-ranged intercalation state, controlled by various structural parameters of the tethered chains and the applied pressure. The dynamical mechanism during the transition is explored through examining the diffusion trajectories of the nanoparticles confined at the interfaces. We provide a theoretical analysis of the lateral pressure induced by the tethered chains, which is fully supported by simulation data and reveals that the compression-induced transition is fundamentally attributed to the entropic effect from the tethered chains. Our study leads to a class of interface-reactive nanomaterials in which the transfer and recovery of interfacial nanopatterning presents precise and tunable mechanical responses.
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Affiliation(s)
- Zhengyang Liu
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University , Beijing 100084, People's Republic of China
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Mukumoto K, Averick SE, Park S, Nese A, Mpoukouvalas A, Zeng Y, Koynov K, Leduc PR, Matyjaszewski K. Phototunable Supersoft Elastomers using Coumarin Functionalized Molecular Bottlebrushes for Cell-Surface Interactions Study. Macromolecules 2014. [DOI: 10.1021/ma501609c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Kosuke Mukumoto
- Department
of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Saadyah E. Averick
- Department
of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Laboratory for Bimolecular Medicine, Allegheny Singer Research Institute, 320 East North Street Pittsburgh Pennsylvania 15212, United States
| | - Sangwoo Park
- Department
of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Alper Nese
- Department
of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | | | - Yukai Zeng
- Departments
of Mechanical and Biomedical Engineering and Biological Sciences, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Philip R. Leduc
- Departments
of Mechanical and Biomedical Engineering and Biological Sciences, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department
of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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46
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Li YF, Rubert M, Aslan H, Yu Y, Howard KA, Dong M, Besenbacher F, Chen M. Ultraporous interweaving electrospun microfibers from PCL-PEO binary blends and their inflammatory responses. NANOSCALE 2014; 6:3392-3402. [PMID: 24531205 DOI: 10.1039/c3nr06197c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Production of one dimensional nanomaterials with secondary morphology exhibiting unique functions is challenging. Here we report for the first time that a nanoscale immiscible polymer blend solution electrojet can assemble into ultraporous interweaving microfibers. This intriguingly novel morphology originated from a blend of polycaprolactone (PCL) and polyethylene oxide (PEO) in a DCM-DMF mixed solution when the ratio between each component reached a threshold and when the electrospinning parameters were delicately controlled. The morphology, crystallinity, surface chemistry and wettabilities were characterized to understand the mechanism of formation. The interplay of the two semi-crystalline polymers and the pair of solvents/non-solvents with the electrospinning processing parameters was found to be critical for the formation of the unique structure. Furthermore, the interesting combination of biocompatible, biodegradable PCL with protein-resistant PEO motivated us to assess its inflammation responses on the RAW 264.7 macrophage cell line. All fibers were found to be biocompatible with low inflammation potential upon incubation, while compared with pure PCL nanofibers; the unique interweaving microfibers induced a slightly higher inflammatory reaction.
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Affiliation(s)
- Yan-Fang Li
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark.
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47
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Kujawa P, Winnik FM. Materials nanoarchitectonics: a conspectus for polymer scientists. POLYM INT 2013. [DOI: 10.1002/pi.4663] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Piotr Kujawa
- World Premier International (WPI) Research Center Initiative; International Center for Materials Nanoarchitectonics (MANA) and National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba 305-0044 Japan
| | - Françoise M. Winnik
- World Premier International (WPI) Research Center Initiative; International Center for Materials Nanoarchitectonics (MANA) and National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba 305-0044 Japan
- Laboratory of Polymer Chemistry, Department of Chemistry and Faculty of Pharmacy; University of Helsinki; 00014 Helsinki Finland
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48
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Choi I, Kulkarni DD, Xu W, Tsitsilianis C, Tsukruk VV. Star polymer unimicelles on graphene oxide flakes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9761-9769. [PMID: 23883114 DOI: 10.1021/la401597p] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report the interfacial assembly of amphiphilic heteroarm star copolymers (PSnP2VPn and PSn(P2VP-b-PtBA)n (n = 28 arms)) on graphene oxide flakes at the air-water interface. Adsorption, spreading, and ordering of star polymer micelles on the surface of the basal plane and edge of monolayer graphene oxide sheets were investigated on a Langmuir trough. This interface-mediated assembly resulted in micelle-decorated graphene oxide sheets with uniform spacing and organized morphology. We found that the surface activity of solvated graphene oxide sheets enables star polymer surfactants to subsequently adsorb on the presuspended graphene oxide sheets, thereby producing a bilayer complex. The positively charged heterocyclic pyridine-containing star polymers exhibited strong affinity onto the basal plane and edge of graphene oxide, leading to a well-organized and long-range ordered discrete micelle assembly. The preferred binding can be related to the increased conformational entropy due to the reduction of interarm repulsion. The extent of coverage was tuned by controlling assembly parameters such as concentration and solvent polarity. The polymer micelles on the basal plane remained incompressible under lateral compression in contrast to ones on the water surface due to strongly repulsive confined arms on the polar surface of graphene oxide and a preventive barrier in the form of the sheet edges. The densely packed biphasic tile-like morphology was evident, suggesting the high interfacial stability and mechanically stiff nature of graphene oxide sheets decorated with star polymer micelles. This noncovalent assembly represents a facile route for the control and fabrication of graphene oxide-inclusive ultrathin hybrid films applicable for layered nanocomposites.
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Affiliation(s)
- Ikjun Choi
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
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49
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Szleifer I. Macromolecular mixing: Entropic templating. NATURE MATERIALS 2013; 12:693-694. [PMID: 23877397 DOI: 10.1038/nmat3728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- Igal Szleifer
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, USA.
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