| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Amenitsch, Heinz
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (46/46 displayed)
- 2023Silicon and Germanium Functionalized Perylene Diimides – Synthesis, Optoelectronic Properties, and their Application as Non-Fullerene Acceptors in Organic Solar Cellscitations
- 2023Poly(ethylene oxide)-block-poly(hexyl acrylate) Copolymers as Templates for Large Mesopore Sizes─A Detailed Porosity Analysiscitations
- 2023Strongly Confined CsPbBr3 Quantum Dots as Quantum Emitters and Building Blocks for Rhombic Superlatticescitations
- 2023Lignin-Derived Mesoporous Carbon for Sodium-Ion Batteriescitations
- 2023Strongly Confined CsPbBr3 Quantum Dots as Quantum Emitters and Building Blocks for Rhombic Superlattices.
- 2023Solution-Processable Cu3BiS3 Thin Films: Growth Process Insights and Increased Charge Generation Properties by Interface Modificationcitations
- 2023The challenge with high permittivity acceptors in organic solar cells: a case study with Y-series derivativescitations
- 2023Strongly confined CsPbBr 3 quantum dots as quantum emitters and building blocks for rhombic superlatticescitations
- 2022Supramolecular Chalcogenâ€Bonded Semiconducting Nanoribbons at Work in Lighting Devicescitations
- 2022In Situ Study of Nanoporosity Evolution during Dealloying AgAu and CoPd by Grazing-Incidence Small-Angle X-ray Scatteringcitations
- 2022In Situ Study of Nanoporosity Evolution during Dealloying AgAu and CoPd by Grazing-Incidence Small-Angle X-ray Scatteringcitations
- 2022Supramolecular Chalcogen-Bonded Semiconducting Nanoribbons at Work in Lighting Devicescitations
- 2022Supramolecular Chalcogen-Bonded Semiconducting Nanoribbons at Work in Lighting Devicescitations
- 2022Glycol bearing perylene monoimide based non-fullerene acceptors with increased dielectric permittivitycitations
- 2022Self‐Assembly of Oriented Antibody‐Decorated Metal–Organic Framework Nanocrystals for Active‐Targeting Applicationscitations
- 2022Self‐Assembly of Oriented Antibody‐Decorated Metal–Organic Framework Nanocrystals for Active‐Targeting Applicationscitations
- 2021Block-Copolymers Enable Direct Reduction and Structuration of Noble Metal-based Filmscitations
- 2021Metal–Insulator Transition of Ultrathin Sputtered Metals on Phenolic Resin Thin Films: Growth Morphology and Relations to Surface Free Energy and Reactivitycitations
- 2021Monodisperse long-chain sulfobetaine-capped CsPbBr 3 nanocrystals and their superfluorescent assembliescitations
- 2021Self-Assembly of Oriented Antibody-Decorated Metal–Organic Framework Nanocrystals for Active-Targeting Applicationscitations
- 2021Perovskite-type superlattices from lead halide perovskite nanocubescitations
- 2021Two-dimensional perovskites with alternating cations in the interlayer space for stable light-emitting diodescitations
- 2020In situ electrochemical grazing incidence small angle X-ray scattering: From the design of an electrochemical cell to an exemplary study of fuel cell catalyst degradationcitations
- 2020Evolution of the PtNi Bimetallic Alloy Fuel Cell Catalyst under Simulated Operational Conditionscitations
- 2020Cellulose metal sulfide based nanocomposite thin films
- 2020Modulation of metal-azolate frameworks for the tunable release of encapsulated glycosaminoglycanscitations
- 2020Continuous-Flow Synthesis of ZIF-8 Biocomposites with Tunable Particle Sizecitations
- 2019INTERPLAY BETWEEN CRYSTAL STRUCTURE, SHAPE AND FUNCTIONALITY OF COLLOIDAL NANOCRYSTALS AND SUPERCRYSTALS
- 2019Encapsulation, Visualization and Expression of Genes with Biomimetically Mineralized Zeolitic Imidazolate Framework-8 (ZIF-8)citations
- 2019Stable ultraconcentrated and ultradilute colloids of CsPbX 3 (X=Cl, Br) nanocrystals using natural lecithin as a capping ligandcitations
- 2019Carbohydrates@MOFscitations
- 2018High Hydrostatic Pressure Induces a Lipid Phase Transition and Molecular Rearrangements in Low-Density Lipoprotein Nanoparticlescitations
- 2017Structural investigation of bulk and dispersed inverse lyotropic hexagonal liquid crystalline phases of eicosapentaenoic acid monoglyceridecitations
- 2016Design of broadband SERS substrates by the laser-induced aggregation of gold nanoparticlescitations
- 2014Order vs. disorder — a huge increase in ionic conductivity of nanocrystalline LiAlO2 embedded in an amorphous-like matrix of lithium aluminatecitations
- 2014Structural transitions in asymmetric poly(styrene)-block -poly(lactide) thin films induced by solvent vapor exposurecitations
- 2014Self-Assembly of Ferromagnetic Organic–Inorganic Perovskite-Like Filmscitations
- 2014Self-Assembly of Ferromagnetic Organic–Inorganic Perovskite-Like Filmscitations
- 2012Mesoporous SiO2 thin films containing photoluminescent ZnO nanoparticles and simultaneous SAXS/WAXS/ellipsometry experimentscitations
- 2009Hierarchical porous silica films with ultralow refractive indexcitations
- 2008Fabrication of mesoporous functionalized arrays by integrating deep X-ray lithography with dip-pen writingcitations
- 2007Time-resolved simultaneous detection of structural and chemical changes during self-assembly of mesostructured filmscitations
- 2007Highly ordered self-assembled mesostructured membranescitations
- 2005Thermal-induced phase transitions in self-assembled mesostructured films studied by small-angle X-ray scatteringcitations
- 2005Highly ordered "defect-free" self-assembled hybrid films with a tetragonal mesostructurecitations
- 2004Silica orthorhombic mesostructured films with low refractive index and high thermal stabilitycitations
Places of action
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article
Hierarchical porous silica films with ultralow refractive index
Abstract
<p>Fabrication of hierarchical porous thin films with controlled pore dimension and shape is a current challenge in materials science. In this work, bimodal hierarchical hybrid organic-inorganic thin films with pores in the meso and macro range have been fabricated. The first order of porosity is obtained through a self-assembly process using organic block copolymers as templates for mesopores; the mesophase in the films is well-ordered and has a tetragonal symmetry. We have introduced fluorinated organic nanoparticles of around 70 nm in the precursor solution to act as template of the second order of porosity. The introduction of the nanoparticles has not affected the organization of the mesophase and after the film deposition the nanoparticles become randomly dispersed within the mesostructured matrix. The organization of the mesophase has been studied in situ by small-angle X-ray scattering using synchrotron light; conventional and high-resolution transmission electron microscopy have been used for direct observation of the porosity morphology. The results indicate that hierarchical porous thin films with a bimodal distribution of the pores are obtained upon postsynthesis calcination at 350 °C. The hierarchical porous thin films have a very low refractive index, 1.14 at 633 nm, lower than the 1.17 value measured for the monomodal mesoporous films. The introduction of templating nanoparticles that are removed upon thermal treatment represents, therefore, a successful strategy to decrease the refractive index in porous films. We have also demonstrated that patterning techniques developed for mesostructured films can be successfully extended to this new typology of hierarchical films. Arrays with bimodal hierarchical pore distribution have been fabricated.</p>