1
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Grignon E, An SY, Battaglia AM, Seferos DS. Catechol Homopolymers and Networks through Postpolymerization Modification. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Eloi Grignon
- Department of Chemistry, University of Toronto, Lash Miller Chemical Laboratories, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - So Young An
- Department of Chemistry, University of Toronto, Lash Miller Chemical Laboratories, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Alicia M. Battaglia
- Department of Chemistry, University of Toronto, Lash Miller Chemical Laboratories, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Dwight S. Seferos
- Department of Chemistry, University of Toronto, Lash Miller Chemical Laboratories, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
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2
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Kün-Darbois JD, Libouban H, Camprasse G, Camprasse S, Chappard D. In vivo osseointegration and erosion of nacre screws in an animal model. J Biomed Mater Res B Appl Biomater 2020; 109:780-788. [PMID: 33089667 DOI: 10.1002/jbm.b.34743] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 08/05/2020] [Accepted: 10/07/2020] [Indexed: 12/18/2022]
Abstract
The use of resorbable devices for osteosynthesis has become a subject of interest. Nacre has been proposed as a resorbable and osteoconductive material favoring bone apposition without triggering an inflammatory reaction. We compared the in vivo osseointegration and erosion of nacre screws in an animal model with titanium screws. Implantation of similar nacre and titanium screws was performed in the femoral condyles of adult rats. Animals (n = 41) were randomized in four groups sacrificed at day one, 1, 6, and 12 months. Microcomputed tomography (microCT) allowed 3D morphometry of erosion of nacre. Osseointegration was measured as the volume of trabecular bone bone volume/tissue volume (BV/TV) in a standardized volume of interest around each screw. Undecalcified bone histology was also done. Gross examination revealed a similar clinical osseointegration for titanium and nacre screws. A progressive erosion of nacre screws, but no erosion of titanium screws, was observed in microCT. The volume of nacre screws progressively decreased over time whereas no modification occurred for titanium. For titanium screws, BV/TV remained stable throughout the study. For nacre screws, the BV/TV decrease was not statistically different. A significant difference was found between nacre and titanium screws at 6 months but not at 12 months. The screw heads, outside the bone shaft, were not eroded even after 12 months. Erosion of nacre occurred during the entire study period, only within the bone shaft in direct contact with bone marrow. Bone apposition was observed on nacre surfaces without signs of erosion. Nacre is a promising biomaterial in maxillofacial surgery.
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Affiliation(s)
- Jean-Daniel Kün-Darbois
- GEROM Groupe d'Etude Remodelage Osseux et bioMatériaux, LHEA, IRIS-IBS Institut de Biologie en Santé, Université d'Angers, CHU d'Angers, Angers Cedex, France.,Service de chirurgie maxillo-faciale et stomatologie, CHU d'Angers, Angers Cedex, France
| | - Hélène Libouban
- GEROM Groupe d'Etude Remodelage Osseux et bioMatériaux, LHEA, IRIS-IBS Institut de Biologie en Santé, Université d'Angers, CHU d'Angers, Angers Cedex, France
| | | | | | - Daniel Chappard
- GEROM Groupe d'Etude Remodelage Osseux et bioMatériaux, LHEA, IRIS-IBS Institut de Biologie en Santé, Université d'Angers, CHU d'Angers, Angers Cedex, France
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3
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Sellschopp K, Heckel W, Gäding J, Schröter CJ, Hensel A, Vossmeyer T, Weller H, Müller S, Vonbun-Feldbauer GB. Shape-controlling effects of hydrohalic and carboxylic acids in TiO 2 nanoparticle synthesis. J Chem Phys 2020; 152:064702. [PMID: 32061241 DOI: 10.1063/1.5138717] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The ability to synthesize nanoparticles (NPs), here TiO2, of different shapes in a controlled and reproducible way is of high significance for a wide range of fields including catalysis and materials design. Different NP shapes exhibit variations of emerging facets, and processes such as adsorption, diffusion, and catalytic activity are, in general, facet sensitive. Therefore, NP properties, e.g., the reactivity of NPs or the stability of assembled NPs, depend on their shape. We combine computational modeling based on density functional theory with experimental techniques such as transmission electron microscopy, energy-dispersive x-ray spectroscopy, and x-ray powder diffraction to investigate the ability of various adsorbates, including hydrohalic and carboxylic acids, to influence NP shape. This approach allows us to identify mechanisms stabilizing specific surface facets and thus to predict NP shapes using computational model systems and to experimentally characterize the synthesized NPs in detail. Shape-controlled anatase TiO2 NPs are synthesized here in agreement with the calculations in platelet and bi-pyramidal shapes by employing different precursors. The importance of the physical conditions and chemical environment during synthesis, e.g., via competitive adsorption or changes in the chemical potentials, is studied via ab initio thermodynamics, which allows us to set previous and new results in a broader context and to highlight potentials for additional synthesis routes and NP shapes.
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Affiliation(s)
- K Sellschopp
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestr. 15, 21073 Hamburg, Germany
| | - W Heckel
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestr. 15, 21073 Hamburg, Germany
| | - J Gäding
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestr. 15, 21073 Hamburg, Germany
| | - C J Schröter
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
| | - A Hensel
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
| | - T Vossmeyer
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
| | - H Weller
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
| | - S Müller
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestr. 15, 21073 Hamburg, Germany
| | - G B Vonbun-Feldbauer
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestr. 15, 21073 Hamburg, Germany
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4
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Chen M, Hu Y, Hou Y, Li M, Chen M, Tan L, Mu C, Tao B, Luo Z, Cai K. Osteogenesis regulation of mesenchymal stem cells via autophagy induced by silica–titanium composite surfaces with different mechanical moduli. J Mater Chem B 2020; 8:9314-9324. [DOI: 10.1039/d0tb01412e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The high surface elastic modulus of the titanium (Ti) implant is one of the critical factors causing poor osteointegration between the implant surface and surrounding bone tissue.
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5
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Schechtel E, Dören R, Frerichs H, Panthöfer M, Mondeshki M, Tremel W. Mixed Ligand Shell Formation upon Catechol Ligand Adsorption on Hydrophobic TiO 2 Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12518-12531. [PMID: 31487189 DOI: 10.1021/acs.langmuir.9b02496] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Modifying the surfaces of metal oxide nanoparticles (NPs) with monolayers of ligands provides a simple and direct method to generate multifunctional coatings by altering their surface properties. This works best if the composition of the monolayers can be controlled. Mussel-inspired, noninnocent catecholates stand out from other ligands like carboxylates and amines because they are redox-active and allow for highly efficient surface binding and enhanced electron transfer to the surface. However, a comprehensive understanding of their surface chemistry, including surface coverage and displacement of the native ligand, is still lacking. Here, we unravel the displacement of oleate (OA) ligands on hydrophobic, OA-stabilized TiO2 NPs by catecholate ligands using a combination of one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy techniques. Conclusive pictures of the ligand shells before and after surface modification with catecholate were obtained by 1H and 13C NMR spectroscopy (the 13C chemical shift being more sensitive and with a broader range). The data could be explained using a Langmuir-type approach. Gradual formation of a mixed ligand shell was observed, and the surface processes of catecholate adsorption and OA desorption were quantified. Contrary to the prevailing view, catecholate displaces only a minor fraction (∼20%) of the native OA ligand shell. At the same time, the total ligand density more than doubled from 2.3 nm-2 at native oleate coverage to 4.8 nm-2 at maximum catecholate loading. We conclude that the catecholate ligand adsorbs preferably to unoccupied Ti surface sites rather than replacing native OA ligands. This unexpected behavior, reminiscent of the Vroman effect for protein corona formation, appears to be a fundamental feature in the widely used surface modification of hydrophobic metal oxide NPs with catecholate ligands. Moreover, our findings show that ligand displacement on OA-capped TiO2 NPs is not suited for a full ligand shell refunctionalization because it produces only mixed ligand shells. Therefore, our results contribute to a better understanding and performance of photocatalytic applications based on catecholate ligand-sensitized TiO2 NPs.
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Affiliation(s)
- Eugen Schechtel
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - René Dören
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - Hajo Frerichs
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - Martin Panthöfer
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - Mihail Mondeshki
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
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6
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Elasticity of Cross-Linked Titania Nanocrystal Assemblies Probed by AFM-Bulge Tests. NANOMATERIALS 2019; 9:nano9091230. [PMID: 31470667 PMCID: PMC6780250 DOI: 10.3390/nano9091230] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 08/22/2019] [Accepted: 08/25/2019] [Indexed: 01/22/2023]
Abstract
In order to enable advanced technological applications of nanocrystal composites, e.g., as functional coatings and layers in flexible optics and electronics, it is necessary to understand and control their mechanical properties. The objective of this study was to show how the elasticity of such composites depends on the nanocrystals’ dimensionality. To this end, thin films of titania nanodots (TNDs; diameter: ~3–7 nm), nanorods (TNRs; diameter: ~3.4 nm; length: ~29 nm), and nanoplates (TNPs; thickness: ~6 nm; edge length: ~34 nm) were assembled via layer-by-layer spin-coating. 1,12-dodecanedioic acid (12DAC) was added to cross-link the nanocrystals and to enable regular film deposition. The optical attenuation coefficients of the films were determined by ultraviolet/visible (UV/vis) absorbance measurements, revealing much lower values than those known for titania films prepared via chemical vapor deposition (CVD). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images showed a homogeneous coverage of the substrates on the µm-scale but a highly disordered arrangement of nanocrystals on the nm-scale. X-ray photoelectron spectroscopy (XPS) analyses confirmed the presence of the 12DAC cross-linker after film fabrication. After transferring the films onto silicon substrates featuring circular apertures (diameter: 32–111 µm), freestanding membranes (thickness: 20–42 nm) were obtained and subjected to atomic force microscopy bulge tests (AFM-bulge tests). These measurements revealed increasing elastic moduli with increasing dimensionality of the nanocrystals, i.e., 2.57 ± 0.18 GPa for the TND films, 5.22 ± 0.39 GPa for the TNR films, and 7.21 ± 1.04 GPa for the TNP films.
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7
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Huesmann H, Schechtel E, Lieberwirth I, Panthöfer M, Tremel W. Surface Chemistry Directs the Tunable Assembly of TiO
2
Anatase Nanocubes into Three‐Dimensional Mesocrystals. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hannah Huesmann
- Institut für Anorganische Chemie und Analytische Chemie Johannes‐Gutenberg‐Universität Mainz Duesbergweg 10‐14 55128 Mainz Germany
| | - Eugen Schechtel
- Institut für Anorganische Chemie und Analytische Chemie Johannes‐Gutenberg‐Universität Mainz Duesbergweg 10‐14 55128 Mainz Germany
| | - Ingo Lieberwirth
- Max‐Planck‐Institut für Polymerforschung Ackermannweg 10 55128 Mainz Germany
| | - Martin Panthöfer
- Institut für Anorganische Chemie und Analytische Chemie Johannes‐Gutenberg‐Universität Mainz Duesbergweg 10‐14 55128 Mainz Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie Johannes‐Gutenberg‐Universität Mainz Duesbergweg 10‐14 55128 Mainz Germany
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8
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Zhang X, Wu L, Wang J. Distinct Mechanical Properties of Polymer/Polymer-Grafting-Graphene Nanocomposites. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800161] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xu Zhang
- Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
| | - Lixin Wu
- Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
| | - Jianlei Wang
- Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
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9
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Gebbie MA, Wei W, Schrader AM, Cristiani TR, Dobbs HA, Idso M, Chmelka BF, Waite JH, Israelachvili JN. Tuning underwater adhesion with cation-π interactions. Nat Chem 2017; 9:473-479. [PMID: 28430190 DOI: 10.1038/nchem.2720] [Citation(s) in RCA: 183] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 12/09/2016] [Indexed: 12/23/2022]
Abstract
Cation-π interactions drive the self-assembly and cohesion of many biological molecules, including the adhesion proteins of several marine organisms. Although the origin of cation-π bonds in isolated pairs has been extensively studied, the energetics of cation-π-driven self-assembly in molecular films remains uncharted. Here we use nanoscale force measurements in combination with solid-state NMR spectroscopy to show that the cohesive properties of simple aromatic- and lysine-rich peptides rival those of the strong reversible intermolecular cohesion exhibited by adhesion proteins of marine mussel. In particular, we show that peptides incorporating the amino acid phenylalanine, a functional group that is conspicuously sparing in the sequences of mussel proteins, exhibit reversible adhesion interactions significantly exceeding that of analogous mussel-mimetic peptides. More broadly, we demonstrate that interfacial confinement fundamentally alters the energetics of cation-π-mediated assembly: an insight that should prove relevant for diverse areas, which range from rationalizing biological assembly to engineering peptide-based biomaterials.
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Affiliation(s)
- Matthew A Gebbie
- Materials Department, University of California, Santa Barbara, California 93106, USA.,Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA
| | - Wei Wei
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA
| | - Alex M Schrader
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA.,Department of Molecular, Cell and Developmental Biology, University of California, Santa Barbara, California 93106, USA
| | - Thomas R Cristiani
- Materials Department, University of California, Santa Barbara, California 93106, USA
| | - Howard A Dobbs
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Matthew Idso
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Bradley F Chmelka
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
| | - J Herbert Waite
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA.,Department of Molecular, Cell and Developmental Biology, University of California, Santa Barbara, California 93106, USA
| | - Jacob N Israelachvili
- Materials Department, University of California, Santa Barbara, California 93106, USA.,Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA.,Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
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10
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Dreyer A, Feld A, Kornowski A, Yilmaz ED, Noei H, Meyer A, Krekeler T, Jiao C, Stierle A, Abetz V, Weller H, Schneider GA. Organically linked iron oxide nanoparticle supercrystals with exceptional isotropic mechanical properties. NATURE MATERIALS 2016; 15:522-8. [PMID: 26828316 DOI: 10.1038/nmat4553] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 12/21/2015] [Indexed: 05/24/2023]
Abstract
It is commonly accepted that the combination of the anisotropic shape and nanoscale dimensions of the mineral constituents of natural biological composites underlies their superior mechanical properties when compared to those of their rather weak mineral and organic constituents. Here, we show that the self-assembly of nearly spherical iron oxide nanoparticles in supercrystals linked together by a thermally induced crosslinking reaction of oleic acid molecules leads to a nanocomposite with exceptional bending modulus of 114 GPa, hardness of up to 4 GPa and strength of up to 630 MPa. By using a nanomechanical model, we determined that these exceptional mechanical properties are dominated by the covalent backbone of the linked organic molecules. Because oleic acid has been broadly used as nanoparticle ligand, our crosslinking approach should be applicable to a large variety of nanoparticle systems.
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Affiliation(s)
- Axel Dreyer
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestrasse 15, D-21073 Hamburg, Germany
| | - Artur Feld
- Institute of Physical Chemistry, Hamburg University, Grindelallee 117, D-20146 Hamburg, Germany
| | - Andreas Kornowski
- Institute of Physical Chemistry, Hamburg University, Grindelallee 117, D-20146 Hamburg, Germany
| | - Ezgi D Yilmaz
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestrasse 15, D-21073 Hamburg, Germany
| | - Heshmat Noei
- DESY NanoLab, Deutsches Elektronensynchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Andreas Meyer
- Institute of Physical Chemistry, Hamburg University, Grindelallee 117, D-20146 Hamburg, Germany
| | - Tobias Krekeler
- Electron Microscopy Unit, Hamburg University of Technology, Eißendorfer Strasse 42, D-21073 Hamburg, Germany
| | - Chengge Jiao
- FEI Company, Achtseweg Noord 5, 5651 GG Eindhoven, The Netherlands
| | - Andreas Stierle
- DESY NanoLab, Deutsches Elektronensynchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
- Physics Department, Hamburg University, Jungiusstrasse 11, D-20355 Hamburg, Germany
| | - Volker Abetz
- Institute of Physical Chemistry, Hamburg University, Grindelallee 117, D-20146 Hamburg, Germany
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, 21502 Geesthacht, Germany
| | - Horst Weller
- Institute of Physical Chemistry, Hamburg University, Grindelallee 117, D-20146 Hamburg, Germany
- Center for Applied Nanotechnology, Grindelallee 117, D-20146 Hamburg, Germany
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Gerold A Schneider
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestrasse 15, D-21073 Hamburg, Germany
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11
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Wooh S, Huesmann H, Tahir MN, Paven M, Wichmann K, Vollmer D, Tremel W, Papadopoulos P, Butt HJ. Synthesis of Mesoporous Supraparticles on Superamphiphobic Surfaces. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:7338-43. [PMID: 26461096 DOI: 10.1002/adma.201503929] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 08/26/2015] [Indexed: 05/27/2023]
Abstract
A method for mesoporous supraparticle synthesis on superamphiphobic surfaces is designed. Therefore, supraparticles assembled with nanoparticles are synthesized by the evaporation of nanoparticle dispersion drops on the superamphiphobic surface. For synthesis, no further purification is required and no organic solvents are wasted. Moreover, by changing the conditions such as drop size and concentration, supraparticles of different sizes, compositions, and architectures are fabricated.
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Affiliation(s)
- Sanghyuk Wooh
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Hannah Huesmann
- Institute of Inorganic Chemistry, University of Mainz, Duesbergweg 10-14, D-55099, Mainz, Germany
| | - Muhammad Nawaz Tahir
- Institute of Inorganic Chemistry, University of Mainz, Duesbergweg 10-14, D-55099, Mainz, Germany
| | - Maxime Paven
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Kristina Wichmann
- Institute of Inorganic Chemistry, University of Mainz, Duesbergweg 10-14, D-55099, Mainz, Germany
| | - Doris Vollmer
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Wolfgang Tremel
- Institute of Inorganic Chemistry, University of Mainz, Duesbergweg 10-14, D-55099, Mainz, Germany
| | | | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
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12
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Wang CX, Braendle A, Menyo MS, Pester CW, Perl EE, Arias I, Hawker CJ, Klinger D. Catechol-based layer-by-layer assembly of composite coatings: a versatile platform to hierarchical nano-materials. SOFT MATTER 2015; 11:6173-6178. [PMID: 26151660 DOI: 10.1039/c5sm01374g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Inspired by the marine mussel's ability to adhere to surfaces underwater, an aqueous catechol-based dip coating platform was developed. Using a catechol-functionalized polyacrylamide binder in combination with inorganic nanoparticles enables the facile fabrication of robust composite coatings via a layer-by-layer process. This modular assembly of well-defined building blocks provides a versatile alternative to electrostatic driven approaches with layer thickness and refractive indices being readily tunable. The platform nature of this approach enables the fabrication of hierarchically ordered nano-materials such as Bragg stacks.
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Affiliation(s)
- C X Wang
- Materials Research Laboratory, University of California Santa Barbara, CA 93106, USA.
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