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Uchida K, Mita K, Yamamoto S, Tanaka K. Local Orientation of Polystyrene at the Interface with Poly(methyl methacrylate) in Block Copolymer. ACS Macro Lett 2020; 9:1576-1581. [PMID: 35617059 DOI: 10.1021/acsmacrolett.0c00638] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The local conformation of polystyrene (PS) at the phase-separated lamellar interface with poly(methyl methacrylate) (PMMA) in their diblock copolymer (BCP) was examined by sum-frequency generation spectroscopy in conjunction with a full-atomistic molecular dynamics simulation. While PS phenyl groups of BCP were oriented in the interfacial region, they were random in the bulk. Such an interfacial orientation of phenyl groups was not clear for the corresponding blend of PS and PMMA. The PS backbone of BCP was in-plane oriented and folded near to the chemical junction point located in the interfacial region and the orientation became random at several nanometers distant. No evidence for the chain folding at the interface was found for the blend system.
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Affiliation(s)
- Kiminori Uchida
- Mitsui Chemicals Inc., Chiba 299-0265, Japan
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
| | - Kazuki Mita
- Mitsui Chemicals Inc., Chiba 299-0265, Japan
| | - Satoru Yamamoto
- Center for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka 819-0395, Japan
| | - Keiji Tanaka
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
- Center for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan
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2
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Sekman Y, Felde N, Ghazaryan L, Szeghalmi A, Schröder S. Light scattering characterization of single-layer nanoporous SiO 2 antireflection coating in visible light. APPLIED OPTICS 2020; 59:A143-A149. [PMID: 32225366 DOI: 10.1364/ao.59.00a143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
Antireflective coatings are widely applied on transparent optical components to reduce reflections at surfaces. Nanoporous silica (NP SiO2) thin films with tailored refractive index properties are used as single-layer antireflective coatings providing nearly zero reflectivity. In this work, light scattering properties of nanoporous silica single-layer antireflective coatings are investigated in order to determine their optical quality by means of total scattering and detailed roughness analysis. Scattering and roughness characterization of the samples coated with different film thicknesses were realized to distinguish the influences of nanopores and surface roughness on scattering losses in the visible (VIS) spectral range. No significant correlation of scattering losses with the film thickness is found, showing negligible influence of the nanopores to the overall scattering properties compared with the dominating effect of interface roughness. Moreover, the scattering losses from coated fused silica glass were observed as low as 20 ppm (0.002%). It is confirmed that NP SiO2 single-layer antireflective coatings are suitable to be used in optics demanding extremely low scattering characteristics.
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Supramolecular membranes: A robust platform to develop separation strategies towards water-based applications. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.01.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Rokhlenko Y, Moschovas D, Miskaki C, Chan EP, Avgeropoulos A, Osuji CO. Creating Aligned Nanopores by Magnetic Field Processing of Block Copolymer/Homopolymer Blends. ACS Macro Lett 2019; 8:261-266. [PMID: 35650826 DOI: 10.1021/acsmacrolett.9b00043] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe the phase behavior of a cylinder-forming block copolymer (BCP)/homopolymer blend and the generation of aligned nanopores by a combination of magnetic field alignment and selective removal of the minority-block-miscible homopolymer. Alignment is achieved by cooling through the order-disorder transition temperature (Todt) in a 6 T field. The system is a blend of poly(styrene-block-4-vinylpyridine) (PS-b-P4VP) and poly(ethylene glycol) (PEG). PEG is miscible with P4VP and partitions preferentially into the cylindrical microdomains. Calorimetry and X-ray scattering show that Todt decreases linearly with PEG concentration until the onset of macrophase separation, inferred by PEG crystallization. Beyond this point, Todt is invariant with PEG content. Increasing PEG molar mass decreases the concentration at which macrophase separation is observed. Nanopore formation is confirmed by dye uptake experiments that show a clear dependence of dye uptake on PEG content before removal. We anticipate that this strategy can be extended to other BCP/homopolymer blends to produce nanoporous materials with reliable control of pore alignment and effective pore dimensions.
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Affiliation(s)
- Yekaterina Rokhlenko
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Dimitrios Moschovas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Christina Miskaki
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Edwin P. Chan
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Chinedum O. Osuji
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Wang C, Wang TM, Wang QH. Ultralow-dielectric, nanoporous poly(methyl silsesquioxanes) films templated by a self-assembled block copolymer upon solvent annealing. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1650-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Stevens DM, Shu JY, Reichert M, Roy A. Next-Generation Nanoporous Materials: Progress and Prospects for Reverse Osmosis and Nanofiltration. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02411] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Derek M. Stevens
- Dow Water and Process Solutions, 7600 Metro Boulevard, Edina, Minnesota 55439, United States
| | - Jessica Y. Shu
- Dow Water and Process Solutions, 7600 Metro Boulevard, Edina, Minnesota 55439, United States
| | - Matthew Reichert
- Dow Water and Process Solutions, 7600 Metro Boulevard, Edina, Minnesota 55439, United States
| | - Abhishek Roy
- Dow Water and Process Solutions, 7600 Metro Boulevard, Edina, Minnesota 55439, United States
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Dry–wet phase inversion block copolymer membranes with a minimum evaporation step from NMP/THF mixtures. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2015.12.069] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Vriezekolk EJ, Kudernac T, de Vos WM, Nijmeijer K. Composite ultrafiltration membranes with tunable properties based on a self-assembling block copolymer/homopolymer system. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23795] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Erik J. Vriezekolk
- Membrane Science and Technology, MESA+ Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
| | - Tibor Kudernac
- Molecular Nanofabrication Group, MESA+ Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
| | - Wiebe M. de Vos
- Membrane Science and Technology, MESA+ Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
| | - Kitty Nijmeijer
- Membrane Science and Technology, MESA+ Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
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Vriezekolk EJ, de Weerd E, de Vos WM, Nijmeijer K. Control of pore size and pore uniformity in films based on self-assembling block copolymers. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/polb.23600] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Erik J. Vriezekolk
- TNW; Membrane Science and Technology; Mesa Institute for Nanotechnology, University of Twente; P.O. Box 217, 7500 AE Enschede The Netherlands
| | - Eddy de Weerd
- EWI; BIOS Lab on a Chip; University of Twente; P.O. Box 217, 7500 AE Enschede The Netherlands
| | - Wiebe M. de Vos
- TNW; Membrane Science and Technology; Mesa Institute for Nanotechnology, University of Twente; P.O. Box 217, 7500 AE Enschede The Netherlands
| | - Kitty Nijmeijer
- TNW; Membrane Science and Technology; Mesa Institute for Nanotechnology, University of Twente; P.O. Box 217, 7500 AE Enschede The Netherlands
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Pitet LM, van Loon AHM, Kramer EJ, Hawker CJ, Meijer EW. Nanostructured Supramolecular Block Copolymers Based on Polydimethylsiloxane and Polylactide. ACS Macro Lett 2013; 2:1006-1010. [PMID: 35581869 DOI: 10.1021/mz4004979] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hierarchical self-assembly has been demonstrated with diblock copolymers comprising poly(dimethylsiloxane) (PDMS) and poly(lactide) (PLA) with supramolecular, 4-fold hydrogen-bonding junctions. PDMS with a single ureidoguanosine unit at the end was synthesized by a postpolymerization strategy. PLA with a single 1,7-diamidonaphthyridine was synthesized by ring-opening polymerization from the appropriate functional initiator. Selective association of the end groups to form distinct, noncovalent connections between the respective homopolymers in blends was established by 1H NMR spectroscopy. The orthogonal self-assembly of the resulting pseudoblock copolymer, driven by immiscibility between the polymer constituents was demonstrated. Bulk polymer blends were prepared that have approximately symmetric composition and a 1:1 end-group stoichiometry. Small angle X-ray scattering combined with differential scanning calorimetry and transmission electron microscopy provide unambiguous evidence for the adoption of a lamellar morphology having long-range order, nanoscopic domain dimensions (20 nm pitch), and a sharp domain interface defined by the supramolecular building blocks.
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Affiliation(s)
- Louis M. Pitet
- Institute
for Complex Molecular Systems and Laboratory for Macromolecular and
Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Antonie H. M. van Loon
- Institute
for Complex Molecular Systems and Laboratory for Macromolecular and
Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | | | | | - E. W. Meijer
- Institute
for Complex Molecular Systems and Laboratory for Macromolecular and
Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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11
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pH responsiveness of two-layer nano-composite membrane with ultrathin cylindrical nanopores PS-b-P4VP film. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.04.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Roland S, Gaspard D, Prud’homme RE, Bazuin CG. Morphology Evolution in Slowly Dip-Coated Supramolecular PS-b-P4VP Thin Films. Macromolecules 2012. [DOI: 10.1021/ma3007398] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sébastien Roland
- Département de chimie, Centre de recherche sur
les matériaux auto−assemblés (CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ.
Centre−ville, Montréal (QC), Canada H3C 3J7
| | - David Gaspard
- Département de chimie, Centre de recherche sur
les matériaux auto−assemblés (CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ.
Centre−ville, Montréal (QC), Canada H3C 3J7
| | - Robert E. Prud’homme
- Département de chimie, Centre de recherche sur
les matériaux auto−assemblés (CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ.
Centre−ville, Montréal (QC), Canada H3C 3J7
| | - C. Geraldine Bazuin
- Département de chimie, Centre de recherche sur
les matériaux auto−assemblés (CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ.
Centre−ville, Montréal (QC), Canada H3C 3J7
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Yang X, Moosa BA, Deng L, Zhao L, Khashab NM. pH-triggered micellar membrane for controlled release microchips. Polym Chem 2011. [DOI: 10.1039/c1py00300c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li X, Han Y. Tunable wavelength antireflective film by non-solvent-induced phase separation of amphiphilic block copolymer micelle solution. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm13704b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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