A5066733630- Block Copolymer Self-Assembly
- Conducting polymers and applications
- Advanced Cellulose Research Studies
- Advanced Polymer Synthesis and Characterization
- Advanced Sensor and Energy Harvesting Materials
- Nanocomposite Films for Food Packaging
- Polymer Surface Interaction Studies
- Bacteriophages and microbial interactions
- Pickering emulsions and particle stabilization
- Synthesis and properties of polymers
- Surfactants and Colloidal Systems
- Metal-Organic Frameworks: Synthesis and Applications
- Electrospun Nanofibers in Biomedical Applications
- Electrochemical sensors and biosensors
- Mesoporous Materials and Catalysis
- Organic Electronics and Photovoltaics
- Electrochemical Analysis and Applications
- Phytoplasmas and Hemiptera pathogens
- Polymer Science and PVC
- Electrohydrodynamics and Fluid Dynamics
- Carbon dioxide utilization in catalysis
- Characterization and Applications of Magnetic Nanoparticles
- Polydiacetylene-based materials and applications
- Nanoparticles: synthesis and applications
- Fuel Cells and Related Materials
Aalto University
2010-2017
Helsinki Institute of Physics
2009-2011
University of Fribourg
2008
University of Helsinki
2008
VTT Technical Research Centre of Finland
2002
Hollow nano-objects have raised interest in applications such as sensing, encapsulation, and drug-release. Here we report on a new class of porous materials, namely inorganic nanotube aerogels that, unlike other aerogels, framework consisting hollow nanotubes. First show preparation method for titanium dioxide, zinc oxide, aluminum oxide based atomic layer deposition (ALD) biological nanofibrillar aerogel templates, that is, nanofibrillated cellulose (NFC), also called microfibrillated (MFC)...
Protein cages such as ferritin and viral capsids are interesting building blocks for nanotechnology due to their monodisperse structure ability encapsulate various functional moieties. Here we show that recombinant protein encapsulating Fe3O4–γ-Fe2O3 iron oxide (magnetoferritin) nanoparticles photodegradable Newkome-type dendrons self-assemble into micrometer-sized complexes with a face-centered-cubic (fcc) superstructure lattice constant of 13.1 nm. The magnetic properties the...
Amine functionalised and consequently cationic linear polymers, Newkome-type dendrons PAMAM dendrimers can efficiently form electrostatic complexes with negatively charged cowpea chlorotic mottle viruses (CCMVs). The have been characterised by dynamic light scattering (DLS), gel electrophoresis, transmission electron microscopy (TEM) small angle X-ray (SAXS), which describe in detail how the size structure topology of polyamine controls complex formation virus. DLS results show that are...
The double gyroid network morphology has been the focus of extensive research efforts as one most appealing block copolymer structures for practical applications. We performed an study phase behavior supramolecular complex PS-b-P4VP(PDP)x to develop a systematic route its morphology. morphological characterization complexes was accomplished by transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS). Several compositions with cubic Ia3̅d symmetry were found in narrow...
Previously we demonstrated hierarchical self-assembly and mesoporosity in electrospun fibers using selected polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) diblock copolymers with hydrogen-bonded 3-n-pentadecylphenol (PDP), which rendered distorted spherical P4VP(PDP)1.0 domains within the PS matrix, internal lamellar order domains, allowed pores by removing PDP (Adv. Mater. 2005, 17, 1048). Here study whether structure of can be systematically tailored varying compositions...
Abstract Supramolecular complexes of a poly( tert ‐butoxystyrene)‐ block ‐polystyrene‐ ‐poly(4‐vinylpyridine) triblock copolymers and less than stoichiometric amounts pentadecylphenol (PDP) are shown to self‐assemble into core–shell gyroid morphology with the core channels formed by hydrogen‐bonded P4VP(PDP)complexes. After structure formation, PDP was removed using simple washing procedure, resulting in well‐ordered nanoporous films that were used as templates for nickel plating. magnified image
The combination of starch and a star-shaped non-hazardous plasticizer based on phosphazene produces self-reinforced composite films with temporal stability, no leaching retrodegradation.
In an effort to study viscoelastic (vector) percolation and conductivity (scalar) within a single system, we demonstrate conducting polymer/solvent which upon gelation undergoes transition, followed by separate transition. Polyaniline doped camphorsulfonic acid, i.e., PANI(CSA)0.5, shows three regimes in mixtures with m-cresol at narrow concentration window of ca. 6.5−7.5 wt %. At small aging times, viscous fluid (sol) is encountered poor conductivity. Upon gelation, the system enters state...
This work describes the thermoresponsive transition in polystyrene-block-poly(N-isopropylacrylamide)-block-polystyrene (PS-block-PNIPAM-block-PS) triblock copolymer hydrogels, as observed by both direct and reciprocal space in-situ characterization. The hydrogel morphology was studied dry wet state, at temperatures below beyond coil−globule of PNIPAM, using vitrified ice cryo-transmission electron microscopy (cryo-TEM), freeze-drying technique, small-angle X-ray scattering (SAXS). selected...
Abstract A self‐assembled lamellar‐within‐lamellar structure of a side chain liquid crystalline diblock copolymer was shear aligned to induce overall alignment and direct the smectic layer orientation within lamellae. The consisted polystyrene block poly(methyl methacrylate) bearing cholesteryl mesogens with only short oxycarbonyloxyethyl spacers separating from backbone. Upon shearing, lamellae exhibited uniaxial whereas layers showed coexisting perpendicular parallel orientations respect...
Front Cover: For the first time a bicontinuous structure, with supramolecular blocks forming core of core–shell gyroid morphology, has been realized in block copolymer-based hydrogen-bonded side-chain supramolecules. By dissolving side chains well-ordered nanoporous films were obtained. Further information can be found article by G. du Sart, I. Vukovic, Z. E. Polushkin, P. Hiekkataipale, J. Ruokolainen, K. Loos,* and ten Brinke* on page 366.
Front Cover: Hierarchical structures of a liquid crystalline (LC) diblock copolymer were aligned using shear flow. The smectic layers the LC block showed coexisting parallel and perpendicular orientations. Tuning flow conditions allows one to systematically increase fraction domains oriented in manner. Further details can be found article by A. Laiho, P. Hiekkataipale, J. Ruokolainen, O. Ikkala* on page 1218.