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Shang D, Xue R, Ling L, Han J, Li A, Yang N, Wang B, Guo J, Bai S. Additional reaction and mechanism of dicyanobenzene: Formation of amidinium or amidine compounds. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Carter NA, Grove TZ. Repeat-Proteins Films Exhibit Hierarchical Anisotropic Mechanical Properties. Biomacromolecules 2015; 16:706-14. [DOI: 10.1021/bm501578j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Nathan A. Carter
- Department of Chemistry (0212), Virginia Tech, 2107 Hahn Hall
South, Blacksburg, Virginia 24060, United States
| | - Tijana Zarkovic Grove
- Department of Chemistry (0212), Virginia Tech, 2107 Hahn Hall
South, Blacksburg, Virginia 24060, United States
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Kim HC, Park SM, Hinsberg WD. Block Copolymer Based Nanostructures: Materials, Processes, and Applications to Electronics. Chem Rev 2009; 110:146-77. [DOI: 10.1021/cr900159v] [Citation(s) in RCA: 820] [Impact Index Per Article: 54.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ho-Cheol Kim
- IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120
| | - Sang-Min Park
- IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120
| | - William D. Hinsberg
- IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120
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Leite FL, Neto MDO, Paterno LG, Ballestero MRM, Polikarpov I, Mascarenhas YP, Herrmann PSP, Mattoso LHC, Oliveira ON. Nanoscale conformational ordering in polyanilines investigated by SAXS and AFM. J Colloid Interface Sci 2007; 316:376-87. [PMID: 17905261 DOI: 10.1016/j.jcis.2007.08.069] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Revised: 08/24/2007] [Accepted: 08/28/2007] [Indexed: 10/22/2022]
Abstract
Understanding the adsorption mechanisms in nanostructured polymer films has become crucial for their use in technological applications, since film properties vary considerably with the experimental conditions utilized for film fabrication. In this paper, we employ small-angle X-ray scattering (SAXS) to investigate solutions of polyanilines and correlate the chain conformations with morphological features of the nanostructured films obtained with atomic force microscopy (AFM). It is shown that aggregates formed already in solution affect the film morphology; in particular, at early stages of adsorption film morphology appears entirely governed by the chain conformation in solution and adsorption of aggregates. We also use SAXS data for modeling poly(o-ethoxyaniline) (POEA) particle shape through an ab initio procedure based on simulated annealing using the dummy atom model (DAM), which is then compared to the morphological features of POEA films fabricated with distinct pHs and doping acids. Interestingly, when the derivative POEA is doped with p-toluene sulfonic acid (TSA), the resulting films exhibit a fibrillar morphology-seen with atomic force microscopy and transmission electron microscopy-that is consistent with the cylindrical shape inferred from the SAXS data. This is in contrast with the globular morphology observed for POEA films doped with other acids.
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Affiliation(s)
- Fabio L Leite
- National Nanotechnology Laboratory for Agriculture (LNNA), Embrapa Agricultural Instrumentation (EMBRAPA), Rua XV de Novembro, 1452, P.O. Box 741, CEP 13560-970, São Carlos-SP, Brazil.
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Vilkman M, Kosonen H, Nykänen A, Ruokolainen J, Torkkeli M, Serimaa R, Ikkala O. Electrical Conductivity Transitions and Self-Assembly in Comb-Shaped Complexes of Polyaniline Based on Crystallization and Melting of the Supramolecular Side Chains. Macromolecules 2005. [DOI: 10.1021/ma0502856] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marja Vilkman
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland; VTT Information Technology, Microelectronics, Technical Research Center of Finland, P.O. Box 1208, FI-02044 VTT, Finland; and Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Harri Kosonen
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland; VTT Information Technology, Microelectronics, Technical Research Center of Finland, P.O. Box 1208, FI-02044 VTT, Finland; and Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Antti Nykänen
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland; VTT Information Technology, Microelectronics, Technical Research Center of Finland, P.O. Box 1208, FI-02044 VTT, Finland; and Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Janne Ruokolainen
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland; VTT Information Technology, Microelectronics, Technical Research Center of Finland, P.O. Box 1208, FI-02044 VTT, Finland; and Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Mika Torkkeli
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland; VTT Information Technology, Microelectronics, Technical Research Center of Finland, P.O. Box 1208, FI-02044 VTT, Finland; and Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Ritva Serimaa
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland; VTT Information Technology, Microelectronics, Technical Research Center of Finland, P.O. Box 1208, FI-02044 VTT, Finland; and Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Olli Ikkala
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland; VTT Information Technology, Microelectronics, Technical Research Center of Finland, P.O. Box 1208, FI-02044 VTT, Finland; and Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
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