1
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Vidallon MLP, Williams AP, Moon MJ, Liu H, Trépout S, Bishop AI, Teo BM, Tabor RF, Peter K, de Campo L, Wang X. Revealing the Structural Intricacies of Biomembrane-Interfaced Emulsions with Small- and Ultra-Small-Angle Neutron Scattering. SMALL METHODS 2024:e2400348. [PMID: 39087373 DOI: 10.1002/smtd.202400348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 07/14/2024] [Indexed: 08/02/2024]
Abstract
Utilizing cell membranes from diverse cell types for biointerfacing has demonstrated significant advantages in enhancing colloidal stability and incorporating biological properties, tailored specifically for various biomedical applications. However, the structures of these materials, particularly emulsions interfaced with red blood cell (RBC) or platelet (PLT) membranes, remain an underexplored area. This study systematically employs small- and ultra-small-angle neutron scattering (SANS and USANS) with contrast variation to investigate the structure of emulsions containing perfluorohexane within RBC (RBC/PFH) and PLT membranes (PLT/PFH). The findings reveal that the scattering length density of RBC and PLT membranes is 1.5 × 10-6 Å-2, similar to 30% (w/w) deuterium oxide. Using this solvent as a cell membrane-matching medium, estimated droplet diameters are 770 nm (RBC/PFH) and 1.5 µm (PLT/PFH), based on polydispersed sphere model fitting. Intriguingly, calculated patterns and invariant analysis reveal native droplet architectures featuring entirely liquid PFH cores, differing significantly from the observed bubble-droplet core system in electron microscopy. This highlights the advantage of SANS and USANS in differentiating genuine colloidal structures in complex dispersions. In summary, this work underscores the pivotal role of SANS and USANS in characterizing biointerfaced colloids and in uncovering novel colloidal structures with significant potential for biomedical applications and clinical translation.
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Affiliation(s)
- Mark Louis P Vidallon
- Molecular Imaging and Theranostics Laboratory, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC, 3004, Australia
- Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, VIC, 3010, Australia
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
- Baker Department of Cardiovascular Research, Translation and Implementation, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Ashley P Williams
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Mitchell J Moon
- Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, VIC, 3010, Australia
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC, 3004, Australia
| | - Haikun Liu
- Molecular Imaging and Theranostics Laboratory, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC, 3004, Australia
- Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Sylvain Trépout
- Ramaciotti Centre for Cryo-Electron Microscopy, Monash University, Clayton, VIC, 3800, Australia
| | - Alexis I Bishop
- School of Physics and Astronomy, Monash University, Clayton, VIC, 3800, Australia
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Karlheinz Peter
- Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, VIC, 3010, Australia
- Baker Department of Cardiovascular Research, Translation and Implementation, La Trobe University, Bundoora, VIC, 3086, Australia
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC, 3004, Australia
- School of Translational Medicine, Monash University, Melbourne, VIC, 3004, Australia
| | - Liliana de Campo
- Australian Nuclear Science and Technology Organisation (ANSTO), New Illawarra Rd, Lucas Heights, NSW, 2234, Australia
| | - Xiaowei Wang
- Molecular Imaging and Theranostics Laboratory, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC, 3004, Australia
- Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, VIC, 3010, Australia
- Baker Department of Cardiovascular Research, Translation and Implementation, La Trobe University, Bundoora, VIC, 3086, Australia
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC, 3004, Australia
- School of Translational Medicine, Monash University, Melbourne, VIC, 3004, Australia
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2
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Li L, Xu Z, Li W. Emergence of Connected Binary Spherical Structures from the Self-assembly of an AB 2C Four-Arm Star Terpolymer. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luyang Li
- State Key Laboratory of Molecular Engineering of Polymers, Key Laboratory of Computational Physical Sciences, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Zhanwen Xu
- State Key Laboratory of Molecular Engineering of Polymers, Key Laboratory of Computational Physical Sciences, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Weihua Li
- State Key Laboratory of Molecular Engineering of Polymers, Key Laboratory of Computational Physical Sciences, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
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3
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Conn CE, de Campo L, Whitten AE, Garvey CJ, Krause-Heuer AM, van 't Hag L. Membrane Protein Structures in Lipid Bilayers; Small-Angle Neutron Scattering With Contrast-Matched Bicontinuous Cubic Phases. Front Chem 2021; 8:619470. [PMID: 33644002 PMCID: PMC7903247 DOI: 10.3389/fchem.2020.619470] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 12/02/2020] [Indexed: 01/12/2023] Open
Abstract
This perspective describes advances in determining membrane protein structures in lipid bilayers using small-angle neutron scattering (SANS). Differentially labeled detergents with a homogeneous scattering length density facilitate contrast matching of detergent micelles; this has previously been used successfully to obtain the structures of membrane proteins. However, detergent micelles do not mimic the lipid bilayer environment of the cell membrane in vivo. Deuterated vesicles can be used to obtain the radius of gyration of membrane proteins, but protein-protein interference effects within the vesicles severely limits this method such that the protein structure cannot be modeled. We show herein that different membrane protein conformations can be distinguished within the lipid bilayer of the bicontinuous cubic phase using contrast-matching. Time-resolved studies performed using SANS illustrate the complex phase behavior in lyotropic liquid crystalline systems and emphasize the importance of this development. We believe that studying membrane protein structures and phase behavior in contrast-matched lipid bilayers will advance both biological and pharmaceutical applications of membrane-associated proteins, biosensors and food science.
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Affiliation(s)
- Charlotte E. Conn
- School of Science, STEM College, RMIT University, Melbourne, VIC, Australia
| | - Liliana de Campo
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW, Australia
| | - Andrew E. Whitten
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW, Australia
| | - Christopher J. Garvey
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW, Australia
- Lund Institute for Advanced Neutron and X-Ray Science, Lund, Sweden
- Biolfim-Research Center for Biointerfaces and Biomedical Science Department, Faculty of Health and Society, Malmö University, Malmö, Sweden
| | - Anwen M. Krause-Heuer
- National Deuteration Facility, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW, Australia
| | - Leonie van 't Hag
- Department of Chemical Engineering, Monash University, Clayton, VIC, Australia
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4
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Okuro PK, Malfatti‐Gasperini AA, Fasolin LH, Vicente AA, Cunha RL. Self‐Organizing Structures of Phosphatidylcholine in Nonaqueous Solvents: Tailoring Gel‐like Systems. J SURFACTANTS DETERG 2020. [DOI: 10.1002/jsde.12422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Paula K. Okuro
- Department of Food Engineering, School of Food EngineeringUniversity of Campinas Campinas São Paulo 13083‐862 Brazil
| | - Antonio A. Malfatti‐Gasperini
- Brazilian Synchrotron Light Laboratory (LNLS)Brazilian Centre for Research in Energy and Materials (CNPEM) Campinas São Paulo 13083‐970 Brazil
| | - Luiz H. Fasolin
- Department of Food Engineering, School of Food EngineeringUniversity of Campinas Campinas São Paulo 13083‐862 Brazil
| | - António A. Vicente
- Centre of Biological EngineeringUniversity of Minho, Campus de Gualtar Braga 4710‐057 Portugal
| | - Rosiane L. Cunha
- Department of Food Engineering, School of Food EngineeringUniversity of Campinas Campinas São Paulo 13083‐862 Brazil
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5
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Hain TM, Schröder-Turk GE, Kirkensgaard JJK. Patchy particles by self-assembly of star copolymers on a spherical substrate: Thomson solutions in a geometric problem with a color constraint. SOFT MATTER 2019; 15:9394-9404. [PMID: 31595280 DOI: 10.1039/c9sm01460h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Confinement or geometric frustration is known to alter the structure of soft matter, including copolymeric melts, and can consequently be used to tune structure and properties. Here we investigate the self-assembly of ABC and ABB 3-miktoarm star copolymers confined to a spherical shell using coarse-grained dissipative particle dynamics simulations. In bulk and flat geometries the ABC stars form hexagonal tilings, but this is topologically prohibited in a spherical geometry which normally is alleviated by forming pentagonal tiles. However, the molecular architecture of the ABC stars implies an additional 'color constraint' which only allows even tilings (where all polygons have an even number of edges) and we study the effect of these simultaneous constraints. We find that both ABC and ABB systems form spherical tiling patterns, the type of which depends on the radius of the spherical substrate. For small spherical substrates, all solutions correspond to patterns solving the Thomson problem of placing mobile repulsive electric charges on a sphere. In ABC systems we find three coexisting, possibly different tilings, one in each color, each of them solving the Thomson problem simultaneously. For all except the smallest substrates, we find competing solutions with seemingly degenerate free energies that occur with different probabilities. Statistically, an observer who is blind to the differences between B and C can tell from the structure of the A domains if the system is an ABC or an ABB star copolymer system.
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Affiliation(s)
- Tobias M Hain
- College of Science, Health, Engineering and Education, Mathematics and Statistics, Murdoch University, 90 South Street, 6150 Murdoch, Western Australia, Australia.
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6
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Shan Y, Wang X, Ji Y, He L, Li S. Self-assembly of phospholipid molecules in solutions under shear flows: Microstructures and phase diagrams. J Chem Phys 2019; 149:244901. [PMID: 30599738 DOI: 10.1063/1.5056229] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Shear-induced microstructures and their phase diagrams were investigated for phospholipid molecules in aqueous solution by dissipative particle dynamic simulation. Self-assembled microstructures, including spherical and cylindrical micelles, spherical vesicles, lamellae, undulated lamellae, perforated lamellae, and continuous networks, were observed under various shear flows and phospholipid concentrations, where the spatial inhomogeneity and symmetry were analysed. A series of phase diagrams were constructed based on the chain lengths under various phospholipid concentrations. The phase distributions showed that the structures with spherical symmetry could be shear-induced to structures with cylindrical symmetry in the dilute solutions. In the semi-concentrated solutions, the lamellae were located in most spaces under zero shear flows, which could be shear-induced into undulated lamellae and then into cylindrical micelles. For the concentrated solutions, the strong shear flows oriented the directions of multilayer lamellae and phase transitions appeared between several cylindrical network structures. These observations on shear-induced microstructures and their distributions revealed a promising approach that could be used to design bio-microstructures based on phospholipid molecules under shear flows.
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Affiliation(s)
- Yue Shan
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Xianghong Wang
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Yongyun Ji
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Linli He
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Shiben Li
- Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
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7
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Subianto S, Balu R, de Campo L, Sokolova A, Dutta NK, Choudhury NR. Sulfonated Thiophene Derivative Stabilized Aqueous Poly(3-hexylthiophene):Phenyl-C 61-butyric Acid Methyl Ester Nanoparticle Dispersion for Organic Solar Cell Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:44116-44125. [PMID: 30474957 DOI: 10.1021/acsami.8b15589] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Aqueous dispersions of poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester (P3HT:PCBM) nanoparticles (NPs) have been fabricated using a thiophene-based surfactant 2-(3-thienyl)ethyloxybutylsulfonate sodium salt (TEBS) for the first time via the mini-emulsion process. The use of TEBS resulted in a stable colloidal dispersion of P3HT:PCBM NPs, of which the effect of various fabrication parameters is investigated. The fabricated NPs were characterized by dynamic light scattering, scanning electron microscopy, UV-visible spectroscopy, contrast-variation small and ultra-small angle neutron scattering, and cyclic voltammetry. The internal structure and electrochemical performance of TEBS-stabilized P3HT:PCBM NPs were compared to those of sodium dodecyl sulfate-stabilized core-shell (PCBM-P3HT) NPs at the same surfactant concentration. Neutron scattering and cyclic voltammetry results reveal a homogeneous distribution of small de-mixed P3HT and PCBM domains in the internal structure of TEBS-stabilized P3HT:PCBM NPs, reminiscent of cast film. Moreover, electron microscopy images show evidence of diffused NP surface/interface upon drying (without annealing), which indicates that the thiophene-containing TEBS may improve compatibility and film-forming properties of fabricated P3HT:PCBM NPs, and consequently be more suited for conventional film-processing methods for organic solar cell applications.
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Affiliation(s)
- Surya Subianto
- Future Industries Institute , University of South Australia , Mawson Lakes , South Australia 5095 , Australia
| | - Rajkamal Balu
- School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia
| | - Liliana de Campo
- Australian Centre for Neutron Scattering (ACNS) , Australian Nuclear Science and Technology Organisation (ANSTO) , Lucas Heights , New South Wales 2232 , Australia
| | - Anna Sokolova
- Australian Centre for Neutron Scattering (ACNS) , Australian Nuclear Science and Technology Organisation (ANSTO) , Lucas Heights , New South Wales 2232 , Australia
| | - Naba K Dutta
- Future Industries Institute , University of South Australia , Mawson Lakes , South Australia 5095 , Australia
- School of Chemical Engineering , University of Adelaide , Adelaide , South Australia 5005 , Australia
- School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia
| | - Namita Roy Choudhury
- Future Industries Institute , University of South Australia , Mawson Lakes , South Australia 5095 , Australia
- School of Chemical Engineering , University of Adelaide , Adelaide , South Australia 5005 , Australia
- School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia
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8
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Riabtseva A, Kaberov LI, Noirez L, Ryukhtin V, Nardin C, Verbraeken B, Hoogenboom R, Stepanek P, Filippov SK. Structural characterization of nanoparticles formed by fluorinated poly(2-oxazoline)-based polyphiles. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.01.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Vogel L, Janietz D, Prehm M, Tschierske C. Hydrogen-bonded mesomorphic complexes combining hydrophilic and fluorophilic molecular segments. SOFT MATTER 2018; 14:806-816. [PMID: 29313543 DOI: 10.1039/c7sm01801k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A 2,4-diamino-6-phenyl-1,3,5-triazine carrying a single oligo(ethylene oxide) (EO) chain has been investigated in binary mixtures with two-chain and three-chain semiperfluorinated benzoic acids. Mixtures of the triazine with three equivalents of the complementary acids exhibit a hexagonal columnar (Colh) mesophase. Docking of three acid molecules to the diaminotriazine nucleus leads to the formation of disc-like aggregates with a central hydrogen-bonded polar core surrounded by the peripheral fluoroalkyl chains, which self-assemble in columns arranged on a hexagonal lattice. The polar EO chains at the triazine cores do not segregate into a distinct sub-space but are included into the polar cores, providing increased flexibility of the cores with respect to conformations and available hydrogen bonding sites. In equimolar (1 : 1) triazine/benzoic acid mixtures macroscopic phase separation of excess triazine from the columnar LC phases occurs. These Colh phases are formed by [1 : 3] or [2 : 4] complexes, depending on the number of fluorinated chains. However, some of the excess triazine component is accommodated within the polar column cores, contributing to space filling and providing additional hydrogen bonding along the columns. Thus the EO chain, despite of being fixed at the periphery, assemble in the core region of the aggregates, this is distinct from the self-assembly of related alkyl or semiperfluoroalkyl substituted diaminotriazines with fluorinated benzoic acids, forming discrete disc-like [1 : 3] or rod-like [1 : 1] complexes. Obviously, the flexible EO chains decrease the effect of the aggregate shape on self-assembly and lead to an increased contribution of general amphiphilicity to self-assembly.
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Affiliation(s)
- Laura Vogel
- Fraunhofer Institute for Applied Polymer Research, Geiselbergstr. 69, D-14476 Potsdam-Golm, Germany
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10
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Zhang K, Bai Y, Feng C, Ning G, Ni H, Yu W, Zhao K, Wang B, Hu P. Synthesis and characterization of new H-shaped triphenylene discotic room-temperature liquid crystal tetramers by a copper-free click reaction. NEW J CHEM 2018. [DOI: 10.1039/c7nj02695a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of new H-shaped triphenylene discotic liquid crystal tetramers has been designed and synthesized using a copper-free [3+2] cycloaddition reaction.
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Affiliation(s)
- Kan Zhang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Yuefeng Bai
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Chun Feng
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Guanghui Ning
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Hailiang Ni
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Wenhao Yu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Keqing Zhao
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Biqin Wang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Ping Hu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
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11
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de Campo L, Castle T, Hyde ST. Optimal packings of three-arm star polyphiles: from tricontinuous to quasi-uniformly striped bicontinuous forms. Interface Focus 2017. [PMID: 28630673 DOI: 10.1098/rsfs.2016.0130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Star-shaped molecules with three mutually immiscible arms self-assemble to form a variety of novel structures, with conformations that attempt to minimize interfacial area between the domains composed of the different arms. The geometric frustration caused by the joining of these arms at a common centre limits the size and shape of each domain, encouraging the creation of complex and interesting solutions. Some solutions are tricontinuous, and these solutions (and others) share aspects of bicontinuous structures with amphiphilic assemblies as similar molecular segregation factors are at work. We describe both highly symmetric and balanced structures, as well as unbalanced solutions that take the form of intricately striped amphiphilic membranes. All these patterns can result in chiral assemblies with multiple networks.
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Affiliation(s)
- Liliana de Campo
- Department of Applied Mathematics, Research School of Physical Sciences, Australian National University, Canberra, Australia.,Australian Nuclear Science and Technology Organisation, ACNS, Lucas Heights, Australia
| | - Toen Castle
- Department of Applied Mathematics, Research School of Physical Sciences, Australian National University, Canberra, Australia.,Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, USA
| | - Stephen T Hyde
- Department of Applied Mathematics, Research School of Physical Sciences, Australian National University, Canberra, Australia
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12
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Qiang X, Wang X, Ji Y, Li S, He L. Liquid-crystal self-assembly of lipid membranes on solutions: A dissipative particle dynamic simulation study. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.03.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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13
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Greaves TL, Drummond CJ. Protic Ionic Liquids: Evolving Structure-Property Relationships and Expanding Applications. Chem Rev 2015; 115:11379-448. [PMID: 26426209 DOI: 10.1021/acs.chemrev.5b00158] [Citation(s) in RCA: 512] [Impact Index Per Article: 56.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tamar L Greaves
- School of Applied Sciences, College of Science, Engineering and Health, RMIT University , GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - Calum J Drummond
- School of Applied Sciences, College of Science, Engineering and Health, RMIT University , GPO Box 2476, Melbourne, Victoria 3001, Australia
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14
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Roy B, Satpathi S, Gavvala K, Koninti RK, Hazra P. Solvation Dynamics in Different Phases of the Lyotropic Liquid Crystalline System. J Phys Chem B 2015; 119:11721-31. [PMID: 26258397 DOI: 10.1021/acs.jpcb.5b04370] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Reverse hexagonal (HII) liquid crystalline material based on glycerol monooleate (GMO) is considered as a potential carrier for drugs and other important biomolecules due to its thermotropic phase change and excellent morphology. In this work, the dynamics of encapsulated water, which plays important role in stabilization and formation of reverse hexagonal mesophase, has been investigated by time dependent Stokes shift method using Coumarin-343 as a solvation probe. The formation of the reverse hexagonal mesophase (HII) and transformation to the L2 phase have been monitored using small-angle X-ray scattering and polarized light microscopy experiments. REES studies suggest the existence of different polar regions in both HII and L2 systems. The solvation dynamics study inside the reverse hexagonal (HII) phase reveals the existence of two different types of water molecules exhibiting dynamics on a 120-900 ps time scale. The estimated diffusion coefficients of both types of water molecules obtained from the observed dynamics are in good agreement with the measured diffusion coefficient collected from the NMR study. The calculated activation energy is found to be 2.05 kcal/mol, which is associated with coupled rotational-translational water relaxation dynamics upon the transition from "bound" to "quasi-free" state. The observed ∼2 ns faster dynamics of the L2 phase compared to the HII phase may be associated with both the phase transformation as well as thermotropic effect on the relaxation process. Microviscosities calculated from time-resolved anisotropy studies infer that the interface is almost ∼22 times higher viscous than the central part of the cylinder. Overall, our results reveal the unique dynamical features of water inside the cylinder of reverse hexagonal and inverse micellar phases.
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Affiliation(s)
- Bibhisan Roy
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| | - Sagar Satpathi
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| | - Krishna Gavvala
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| | - Raj Kumar Koninti
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| | - Partha Hazra
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
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15
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Fischer MG, de Campo L, Kirkensgaard JJK, Hyde ST, Schröder-Turk GE. The Tricontinuous 3ths(5) Phase: A New Morphology in Copolymer Melts. Macromolecules 2014. [DOI: 10.1021/ma5016352] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael G. Fischer
- Institut
für Theoretische Physik, Friedrich-Alexander Universität Erlangen-Nürnberg, Staudtstr. 7B, 91058 Erlangen, Germany
- Applied Maths, Research School of Physics & Engineering, The Australian National University, Canberra ACT 0200, Australia
- Adolphe Merkle
Institute, Chemin des Verdiers 4, CH-1700 Fribourg, Switzerland
| | - Liliana de Campo
- Applied Maths, Research School of Physics & Engineering, The Australian National University, Canberra ACT 0200, Australia
- Australian
National Science and Technology Organisation, Bragg Institute, New
Illawarra Road, Lucas Heights NSW 2234, Australia
| | | | - Stephen T. Hyde
- Applied Maths, Research School of Physics & Engineering, The Australian National University, Canberra ACT 0200, Australia
| | - Gerd E. Schröder-Turk
- Institut
für Theoretische Physik, Friedrich-Alexander Universität Erlangen-Nürnberg, Staudtstr. 7B, 91058 Erlangen, Germany
- Applied Maths, Research School of Physics & Engineering, The Australian National University, Canberra ACT 0200, Australia
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16
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Kirkensgaard JJK, Pedersen MC, Hyde ST. Tiling patterns from ABC star molecules: 3-colored foams? SOFT MATTER 2014; 10:7182-7194. [PMID: 25026461 DOI: 10.1039/c4sm01052c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present coarse-grained simulations of the self-assembly of 3-armed ABC star polyphiles. In systems of star polyphiles with two arms of equal length the simulations corroborate and expand previous findings from related miktoarm star terpolymer systems on the formation of patterns containing columnar domains whose sections are 2D planar tilings. However, the systematic variation of face topologies as the length of the third (unequal) arm is varied differs from earlier findings regarding the compositional dependence. We explore 2D 3-colored foams to establish the optimal patterns based on interfacial energy alone. A generic construction algorithm is described that accounts for all observed 2D tiling patterns and suggests other patterns likely to be found beyond the range of the simulations reported here. Patterns resulting from this algorithm are relaxed using Surface Evolver calculations to form 2D foams with minimal interfacial length as a function of composition. This allows us to estimate the interfacial enthalpic contributions to the free energy of related star molecular assemblies assuming strong segregation. We compare the resulting phase sequence with a number of theoretical results from particle-based simulations and field theory, allowing us to tease out relative enthalpic and entropic contributions as a function of the chain lengths making up the star molecules. Our results indicate that a richer polymorphism is to be expected in systems not dominated by chain entropy. Further, analysis of corresponding planar tiling patterns suggests that related two-periodic columnar structures are unlikely hypothetical phases in 4-arm star polyphile melts in the absence of sufficient arm configurational freedom for minor domains to form lens-shaped di-gons, which require higher molecular weight polymeric arms. Finally, we discuss the possibility of forming a complex tiling pattern that is a quasi-crystalline approximant for 3-arm star polyphiles with unequal arm lengths.
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Shen Y, Greaves TL, Kennedy DF, Weerawardena A, Kirby N, Song G, Drummond CJ. Lyotropic liquid crystal phases of phytantriol in a protic ionic liquid with fluorous anion. Phys Chem Chem Phys 2014; 16:21321-9. [DOI: 10.1039/c4cp01926a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Liquid crystal phases of phytantriol supported in solvent mixtures of a fluorinated protic ionic liquid and water.
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Affiliation(s)
- Yan Shen
- CSIRO Materials Science and Engineering (CMSE)
- , Australia
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237, PR China
| | - Tamar L. Greaves
- CSIRO Materials Science and Engineering (CMSE)
- , Australia
- School of Applied Sciences
- College of Science
- Engineering and Health
| | | | - Asoka Weerawardena
- CSIRO Materials Science and Engineering (CMSE)
- , Australia
- School of Applied Sciences
- College of Science
- Engineering and Health
| | | | - Gonghua Song
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237, PR China
| | - Calum J. Drummond
- CSIRO Materials Science and Engineering (CMSE)
- , Australia
- School of Applied Sciences
- College of Science
- Engineering and Health
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Tschierske C. Entwicklung struktureller Komplexität durch Selbstorganisation in flüssigkristallinen Systemen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300872] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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19
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Tschierske C. Development of structural complexity by liquid-crystal self-assembly. Angew Chem Int Ed Engl 2013; 52:8828-78. [PMID: 23934786 DOI: 10.1002/anie.201300872] [Citation(s) in RCA: 356] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Indexed: 11/09/2022]
Abstract
Since the discovery of the liquid-crystalline state of matter 125 years ago, this field has developed into a scientific area with many facets. This Review presents recent developments in the molecular design and self-assembly of liquid crystals. The focus is on new exciting soft-matter structures distinct from the usually observed nematic, smectic, and columnar phases. These new structures have enhanced complexity, including multicompartment and cellular structures, periodic and quasiperiodic arrays of spheres, and new emergent properties, such as ferroelctricity and spontaneous achiral symmetry-breaking. Comparisons are made with developments in related fields, such as self-assembled monolayers, multiblock copolymers, and nanoparticle arrays. Measures of structural complexity used herein are the size of the lattice, the number of distinct compartments, the dimensionality, and the logic depth of the resulting supramolecular structures.
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Affiliation(s)
- Carsten Tschierske
- Institut für Chemie, Organische Chemie, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle Saale, Germany.
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Wadekar MN, Abezgaus L, Djanashvili K, Jager WF, Mendes E, Picken SJ, Dganit D. Supramolecular “Leeks” of a Fluorinated Hybrid Amphiphile That Self-Assembles into a Disordered Columnar Phase. J Phys Chem B 2013; 117:2820-6. [DOI: 10.1021/jp311337z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Ludmila Abezgaus
- Department of Biotechnology
and Food Engineering and the Russell Berrie Nanotechnology Institute, Technion−Israel Institute of Technology, Haifa
32000, Israel
| | | | | | | | | | - Danino Dganit
- Department of Biotechnology
and Food Engineering and the Russell Berrie Nanotechnology Institute, Technion−Israel Institute of Technology, Haifa
32000, Israel
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Schröder-Turk GE, de Campo L, Evans ME, Saba M, Kapfer SC, Varslot T, Grosse-Brauckmann K, Ramsden S, Hyde ST. Polycontinuous geometries for inverse lipid phases with more than two aqueous network domains. Faraday Discuss 2013; 161:215-47; discussion 273-303. [DOI: 10.1039/c2fd20112g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Tschierske C. Microsegregation: From Basic Concepts to Complexity in Liquid Crystal Self-Assembly. Isr J Chem 2012. [DOI: 10.1002/ijch.201200053] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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23
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Liu F, Kieffer R, Zeng X, Pelz K, Prehm M, Ungar G, Tschierske C. Arrays of giant octagonal and square cylinders by liquid crystalline self-assembly of X-shaped polyphilic molecules. Nat Commun 2012; 3:1104. [DOI: 10.1038/ncomms2096] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Accepted: 08/29/2012] [Indexed: 11/09/2022] Open
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Kulkarni CV. Lipid crystallization: from self-assembly to hierarchical and biological ordering. NANOSCALE 2012; 4:5779-91. [PMID: 22899223 DOI: 10.1039/c2nr31465g] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Lipid crystallization is ubiquitous in nature, observed in biological structures as well as in commercial products and applications. In a dehydrated state most of the lipids form well ordered crystals, whereas in an aqueous environment they self-assemble into various crystalline, liquid crystalline or sometimes macroscopically disordered phases. Lipid self-organization extends further to hierarchical levels including structured emulsions and nanostructured particles. Many consumer products including cosmetics, foods and medicines account for such lipid architectures. Cell membranes primarily consist of planar lipid bilayers; however sub-cellular biomembranes are more of a convoluted type. Some of the biological entities have lipids in truly crystalline form; yet liquid crystalline lipid phases are prevalent, in general. Crystallization of fats - triglyceride lipids - has been relatively well documented and reviewed more often, but this review features other areas where lipid organization is crucial and diverse. Some recent advances along with a few explicit examples of model lipid phases and biological evidences are also reported.
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Affiliation(s)
- Chandrashekhar V Kulkarni
- Biological and Soft Systems, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, UK.
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Hyde ST, Schröder-Turk GE. Geometry of interfaces: topological complexity in biology and materials. Interface Focus 2012. [DOI: 10.1098/rsfs.2012.0035] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Stephen T. Hyde
- Department of Applied Mathematics, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia
| | - Gerd E. Schröder-Turk
- Theoretische Physik, Friedrich-Alexander Universität Erlangen-Nürnberg, Staudtstrasse 7B, 91058 Erlangen, Germany
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Kirkensgaard JJK. Striped networks and other hierarchical structures in AmBmCn (2m+n)-miktoarm star terpolymer melts. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 85:031802. [PMID: 22587114 DOI: 10.1103/physreve.85.031802] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2011] [Indexed: 05/31/2023]
Abstract
Using dissipative particle dynamics simulations we give numerical evidence of the formation of "striped" (or AB alternating) diamond and gyroid network structures and other hierarchical morphologies in A(m)B(m)C(n) (2m+n)-miktoarm star terpolymers where the main variable is the ratio x=n/m with m,n being the number of equal length polymer arms of A and B and C, respectively. The formed networks are purely a result of the star topology, as clearly shown by direct comparison with parallel ABC miktoarm star terpolymer simulations with matching overall composition. Progressively changing x, the system adopts the following phase sequence: three-colored lamellae, C spheres embedded in AB lamellae, C spheres decorating AB lamellae, three-colored [6.6.6] tiling, AB striped diamond network, AB striped gyroid network, AB striped hexagonally arranged cylinders, and finally AB striped globular aggregates. The striped gyroid is particularly interesting as it constitutes an inherently chiral structure made from achiral building blocks.
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Affiliation(s)
- Jacob Judas Kain Kirkensgaard
- Department of Basic Sciences and Environment, Faculty of Life Sciences, University of Copenhagen, Copenhagen, Denmark.
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Tschierske C, Nürnberger C, Ebert H, Glettner B, Prehm M, Liu F, Zeng XB, Ungar G. Complex tiling patterns in liquid crystals. Interface Focus 2011; 2:669-80. [PMID: 24098852 DOI: 10.1098/rsfs.2011.0087] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2011] [Accepted: 11/22/2011] [Indexed: 11/12/2022] Open
Abstract
In this account recent progress in enhancing the complexity of liquid crystal self-assembly is highlighted. The discussed superstructures are formed mainly by polyphilic T-shaped and X-shaped molecules composed of a rod-like core, tethered with glycerol units at both ends and flexible non-polar chain(s) in lateral position, but also related inverted molecular structures are considered. A series of honeycomb phases composed of polygonal cylinders ranging from triangular to hexagonal, followed by giant cylinder honeycombs is observed for ternary T-shaped polyphiles on increasing the size of the lateral chain(s). Increasing the chain size further leads to new modes of lamellar organization followed by three-dimensional and two-dimensional structures incorporating branched and non-branched axial rod-bundles. Grafting incompatible chains to opposite sides of the rod-like core leads to quaternary X-shaped polyphiles. These form liquid crystalline honeycombs where different cells are filled with different material. Projected on an Euclidian plane, all honeycomb phases can be described either by uniformly coloured Archimedean and Laves tiling patterns (T-shaped polyphiles) or as multi-colour tiling patterns (X-shaped polyphiles). It is shown that geometric frustration, combined with the tendency to segregate incompatible chains into different compartments and the need to find a periodic tiling pattern, leads to a significant increase in the complexity of soft self-assembly. Mixing of different chains greatly enhances the number of possible 'colours' and in this way, periodic structures comprising up to seven distinct compartments can be generated. Relations to biological self-assembly are discussed shortly.
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Affiliation(s)
- C Tschierske
- Institute of Chemistry, Organic Chemistry , Martin-Luther University Halle-Wittenberg , Kurt-Mothes Strasse 2, 06120 Halle/Saale , Germany
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Lehmann M. Star-Shaped Mesogens – Hekates: The Most Basic Star Structure with Three Branches. Top Curr Chem (Cham) 2011; 318:193-223. [DOI: 10.1007/128_2011_266] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Liu F, Prehm M, Zeng X, Ungar G, Tschierske C. Two- and Three-Dimensional Liquid-Crystal Phases from Axial Bundles of Rodlike Polyphiles: Segmented Cylinders, Crossed Columns, and Ribbons between Sheets. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Liu F, Prehm M, Zeng X, Ungar G, Tschierske C. Two- and Three-Dimensional Liquid-Crystal Phases from Axial Bundles of Rodlike Polyphiles: Segmented Cylinders, Crossed Columns, and Ribbons between Sheets. Angew Chem Int Ed Engl 2011; 50:10599-602. [DOI: 10.1002/anie.201103303] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Indexed: 11/11/2022]
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Tschierske C. Fluorinated Liquid Crystals: Design of Soft Nanostructures and Increased Complexity of Self-Assembly by Perfluorinated Segments. Top Curr Chem (Cham) 2011; 318:1-108. [DOI: 10.1007/128_2011_267] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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