Journal ArticleDOI
Direct Visualization of Individual Cylindrical and Spherical Supramolecular Dendrimers
Steven D. Hudson,Hannes Jung,Hannes Jung,Virgil Percec,Virgil Percec,Wook-Dong Cho,Wook-Dong Cho,Gary Johansson,Gary Johansson,Goran Ungar,Goran Ungar,Venkatachalapathy S. K. Balagurusamy,Venkatachalapathy S. K. Balagurusamy +12 more
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TLDR
In this article, the stiffness of cylindrical supramolecular dendrimers was evaluated by examining their planar texture and its defects, showing that they are self-assembled, self-organized, and aligned spontaneously and simultaneously in hexagonal columnar or cubic thermotropic liquid-crystal phases with high uniformity.Abstract:
Electron microscopy methods have been used to visualize individual spherical and cylindrical supramolecular dendrimers, providing definitive confirmation of the structures suggested by previous x-ray diffraction analysis that assumed a microsegregated model. These dendrimers are self-assembled, self-organized, and aligned spontaneously and simultaneously in hexagonal columnar or cubic thermotropic liquid-crystal phases with high uniformity. Homeotropic and planar ordering of the hexagonal columnar liquid crystal was precisely controlled by a variety of surfaces. The stiffness of these cylinders was evaluated by examining their planar texture and its defects.read more
Citations
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Journal ArticleDOI
About Dendrimers: Structure, Physical Properties, and Applications
Journal ArticleDOI
Convergent Dendrons and Dendrimers: from Synthesis to Applications
Journal ArticleDOI
Peptide-amphiphile nanofibers: A versatile scaffold for the preparation of self-assembling materials
TL;DR: The scope of amino acid selection and alkyl tail modification in the peptide-amphiphile molecules are investigated, yielding nanofibers varying in morphology, surface chemistry, and potential bioactivity, demonstrating the chemically versatile nature of this supramolecular system.
Journal ArticleDOI
Dendron-Mediated Self-Assembly, Disassembly, and Self-Organization of Complex Systems
Brad M. Rosen,Christopher J. Wilson,Daniela A. Wilson,Mihai Peterca,Mohammad R. Imam,Virgil Percec +5 more
TL;DR: The structural origin of chirality in different supramolecular structures through combinations of structural analysis methods has been investigated in this article, where the most ideal building blocks would need to display shape persistence in solution and in the solid state, since only this feature provides access to the use of complementary methods of structural analyses.
Journal ArticleDOI
Self-organization of supramolecular helical dendrimers into complex electronic materials
Virgil Percec,Martin Glodde,Tushar K. Bera,Yoshiko Miura,Irina Shiyanovskaya,Kenneth D. Singer,Venkatachalapathy S. K. Balagurusamy,Paul A. Heiney,Ingo Schnell,Almut Rapp,Hans Wolfgang Spiess,Steven D. Hudson,H. Duan +12 more
TL;DR: This work finds that attaching conducting organic donor or acceptor groups to the apex of the dendrons leads to supramolecular nanometre-scale columns that contain in their cores π-stacks of donors, acceptors or donor–acceptor complexes exhibiting high charge carrier mobilities.
References
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Bull. Soc. Chim. Fr.
G. Hugel,G. Ourisson,J. Bye,J Miquel,D. P. Funeriu,Y He,H Bister,J-M Lehn,M Mousseron,J. M. Kamenka,Darvich +10 more
Journal ArticleDOI
Functional polymers and dendrimers: reactivity, molecular architecture, and interfacial energy
TL;DR: The interaction of polymers with their environment depends largely on the functional groups they carry and the placement of functional groups at polymer chain ends or in well-defined segments can determine the ultimate properties.
Journal ArticleDOI
Controlling Polymer-Surface Interactions with Random Copolymer Brushes
TL;DR: In this article, a simple technique for precisely controlling the interfacial energies and wetting behavior of polymers in contact with solid surfaces is described, where end-functionalized statistical random copolymers of styrene and methylmethacrylate are synthesized, with the styrene fraction f varying from 0 to 1, and were end-grafted onto silicon substrates to create random polymers about 5 nanometers thick.
Journal ArticleDOI
Are Single Molecular Wires Conducting
Lloyd A. Bumm,J. J. Arnold,M. T. Cygan,T. D. Dunbar,T. P. Burgin,LeRoy Jones,David L. Allara,James M. Tour,Paul S. Weiss +8 more
TL;DR: In this paper, the authors inserted conjugated molecules, which were 4,4′-di(phenylene-ethynylene)benzenethiolate derivatives, formed single molecular wires that extended from the Au{111} substrate to about 7 angstroms above.