De Luca G.,CNR Institute for Composite and Biomedical Materials |
Pisula W.,Max Planck Institute for Polymer Research |
Credgington D.,University College London |
Treossi E.,CNR Institute for Organic Syntheses and Photoreactivity |
And 9 more authors.
Advanced Functional Materials | Year: 2011
In the search for new ways to combine the appealing simplicity of solution processing methods and the need for a high performance of the active layer of organic (opto)electronic devices, the possibilities given by the joint use of well-established casting techniques and post-treatment procedures are explored, as well as new and unconventional deposition protocols to tailor self-assembled architectures with a high degree of order at different length scales, from the subnanometer up to the macroscopic scale. In fact, even the same organic molecule can give rise to different molecular architectures which, in turn, may offer the possibility to exploit a large variety of new functionalities of the deposited materials, paving the way towards the fabrication multifunctional organic-based devices. You can tailor it from the bottom or from the top! The combination of well-established and non-conventional methods for processing and post processing of organic functional materials allows the development of highly ordered nanostructures for organic electronic applications. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
De Luca G.,Messina University |
De Luca G.,CNR Institute for Composite and Biomedical Materials |
Liscio A.,CNR Institute for Organic Syntheses and Photoreactivity |
Battagliarin G.,Max Planck Institute for Polymer Research |
And 5 more authors.
Chemical Communications | Year: 2013
Selective solvent vapour annealing is used on a photovoltaic blend to enhance the interaction between the electron acceptor and the electron donor, simplifying thin films post-processing for photovoltaic applications. A remarkable improvement in the interfacial charge transfer in the bulk hetero-junction is attained, as measured by Kelvin Probe Force Microscopy. © 2013 The Royal Society of Chemistry.
Villari V.,CNR Institute for Chemical and Physical Processes |
Mazzaglia A.,CNR Institute of Nanostructured Materials |
Trapani M.,Messina University |
Castriciano M.A.,CNR Institute of Nanostructured Materials |
And 4 more authors.
Journal of Physical Chemistry C | Year: 2011
The assembly among gold nanoparticles, the water-soluble tetrakis(4-sulfonatophenyl)porphyrin and spermine, in acidic solution, forms a hybrid nanocomposite exhibiting scattering enhancement. A scaling law of a cluster-cluster aggregate of metal nanoparticle composites, with 0.3 as optical spectral dimension, is observed in agreement with theoretical models. In this ternary composite, spermine acts as a sticky agent for gold nanoparticles and porphyrins, and the dipolar coupling between porphyrins is responsible for the localization of the electric field giving rise to the scattering enhancement. © 2011 American Chemical Society.
Alongi J.,Polytechnic University of Turin |
Carletto R.A.,Polytechnic University of Turin |
Bosco F.,Polytechnic University of Turin |
Carosio F.,Polytechnic University of Turin |
And 5 more authors.
Polymer Degradation and Stability | Year: 2014
Despite the use of toxic and not environmentally-friendly chemicals, some proteins derived from animal or microbial sources have been investigated as novel green flame retardants for cotton fabrics. In particular, phosphorus- and sulphur-rich proteins (i.e. caseins and hydrophobins) have been homogeneously deposited on cotton fabrics starting from protein aqueous suspensions/solutions. These surface treatments, based on the use of species able to favour the dehydration of cellulose instead of its depolymerization, have strongly enhanced the production of a thermally stable carbonaceous structure (char), hence significantly enhancing the flame retardancy of the fabrics, as assessed by thermogravimetry and flammability tests. © 2013 Elsevier Ltd. All rights reserved.
D'Anto V.,University of Naples Federico II |
Raucci M.G.,CNR Institute for Composite and Biomedical Materials |
Guarino V.,CNR Institute for Composite and Biomedical Materials |
Martina S.,University of Naples Federico II |
And 2 more authors.
Journal of Tissue Engineering and Regenerative Medicine | Year: 2013
Our goal was to characterize the response of human mesenchymal stem cells (hMSCs) to a novel composite scaffold for bone tissue engineering. The hydroxyapatite-polycaprolactone (HA-PCL) composite scaffolds were prepared by a sol-gel method at room temperature and the scaffold morphology was investigated by scanning electron microscopy (SEM)/energy-dispersive spectroscopy (EDS) to validate the synthesis process. The response of two different lines of hMSCs, bone-marrow-derived human mesenchymal stem cells (BMSCs) and dental pulp stem cells (DPSCs) in terms of cell proliferation and differentiation into the osteoblastic phenotype, was evaluated using Alamar blue assay, SEM, histology and alkaline phosphatase activity. Our results indicate that tissue engineering by means of composite HA-PCL scaffolds may represent a new therapeutic strategy to repair craniofacial bone defects. © 2013 John Wiley & Sons, Ltd.
Petrone P.,University of Naples Federico II |
Giordano M.,CNR Institute for Composite and Biomedical Materials |
Giustino S.,University of Naples Federico II |
Guarino F.M.,University of Naples Federico II
PLoS ONE | Year: 2011
Background: The study of ancient skeletal pathologies can be adopted as a key tool in assessing and tracing several diseases from past to present times. Skeletal fluorosis, a chronic metabolic bone and joint disease causing excessive ossification and joint ankylosis, has been only rarely considered in differential diagnoses of palaeopathological lesions. Even today its early stages are misdiagnosed in endemic areas. Methodology/Principal Findings: Endemic fluorosis induced by high concentrations of fluoride in water and soils is a major health problem in several countries, particularly in volcanic areas. Here we describe for the first time the features of endemic fluorosis in the Herculaneum victims of the 79 AD eruption, resulting from long-term exposure to high levels of environmental fluoride which still occur today. Conclusions/Significance: Our observations on morphological, radiological, histological and chemical skeletal and dental features of this ancient population now suggest that in this area fluorosis was already endemic in Roman times. This evidence merged with currently available epidemiologic data reveal for the Vesuvius area population a permanent fluoride health hazard, whose public health and socio-economic impact is currently underestimated. The present guidelines for fluoridated tap water might be reconsidered accordingly, particularly around Mt Vesuvius and in other fluoride hazard areas with high natural fluoride levels. © 2011 Petrone et al.
Mayol L.,University of Naples Federico II |
Biondi M.,University of Naples Federico II |
Russo L.,CNR Institute for Composite and Biomedical Materials |
Malle B.M.,Novozymes AS |
And 2 more authors.
Carbohydrate Polymers | Year: 2014
The idea of this study was to combine hyaluronic acid (HA) viscosupplementation and a local/controlled delivery of a hydrophobic anti-inflammatory drug. To this aim, we investigated the ability of an octenyl succinic anhydride (OSA) modified HA (OSA-HA), to act as a solubility enhancer and as a platform for slow release of hydrophobic drug(s). This novel HA derivative could act as a viscosupplementation agent and, for this reason, a rheological study was conducted along with calorimetric analysis. Differential scanning calorimetry (DSC) results revealed that the ability of HA to sequester water is enhanced by the introduction of lipophilic functions within HA molecules, resulting in a decrease of the fraction of free water able to freeze compared to the unmodified HA. Moreover, OSA-HA solutions appear to be an appropriate tool to be used in viscosupplentation therapy owing to their suitable viscoelastic features. Our results indicate that OSA-HA is able to self-assemble into micelles, load a hydrophobic drug and release the active molecule with controlled kinetics. In particular, the analysis of release profiles showed that, in all cases, drug diffusion into the gel is faster compared to gel/drug dissolution, being the dissolution contribution more relevant as the OSA-HA concentration increases. © 2013 Elsevier Ltd. All rights reserved.
Liguori B.,University of Naples Federico II |
Iucolano F.,University of Naples Federico II |
Capasso I.,CNR Institute for Composite and Biomedical Materials |
Lavorgna M.,CNR Institute for Composite and Biomedical Materials |
Verdolotti L.,CNR Institute for Composite and Biomedical Materials
Materials and Design | Year: 2014
In this paper the interaction mechanism between recycled plastic aggregates and lime matrix in composite mortars was investigated by means of thermal, morphological and Fourier Transform Infrared Spectroscopy (FTIR) analyses. In order to assess the fire behavior of the composite mortars, a cone calorimeter method was adopted. The plastic aggregate, mainly made of polyolefin and polyethylene terephthalate, is obtained from an industrial waste, through a process that provides a plasticization and densification by extrusion of plastic waste. Several composite mortars were prepared by replacing silica powder with 10%, 15% and 20% of recycled aggregate. Experimental results attest that, even if the filler was not chemically modified, there is a good chemical interaction between the plastic aggregate and mortar, involving a reduction of the negative effects on physical and functional properties of the mortar composites, such as thermal degradation and fire resistance. In fact all the specimens showed a scarce sensitivity to flashover, and can be classified as low risk materials. © 2014 Elsevier Ltd.
Larobina D.,CNR Institute for Composite and Biomedical Materials |
Greco F.,CNR Institute for Research on Combustion
Journal of Chemical Physics | Year: 2012
Modeling of stressdiffusion coupling in gels, originally developed by Doi for the case where the solid component of the gel is a linear elastic network, is here extended to the case of a linear viscoelastic solid component, thereby allowing for a mechanism of intrinsic relaxation. The extended model is solved for a cylindrical gel subjected to unconfined uniaxial compression. Depending on the respective values of the two characteristic times, i.e., diffusive and viscoelastic, measurable quantities like axial force and external radius of the cylindrical gel are calculated to display different qualitative behaviors. Calculated results for the case of uniaxial traction are also reported, which compare favorably with some available experimental results. © 2012 American Institute of Physics.
Cafiero L.,CNR Institute for Composite and Biomedical Materials |
Sorrentino L.,CNR Institute for Composite and Biomedical Materials |
Iannace S.,CNR Institute for Composite and Biomedical Materials
AIP Conference Proceedings | Year: 2014
High performance thermoplastic blends based on Poly(ethylene naphthalate)/Poly(ether sulfone) polymers were prepared by melt compounding to study the correlations between composition, morphologies and cellular structure after foaming. Blends were employed to develop high performance foams with controlled cellular morphology by using CO2 as foaming agent. The role of composition, morphology and processing conditions on the dynamic-mechanical properties of solid blends and on the micro- and nano-cellular structures of their foams was analized. Dispersed PES both extended the service temperature and acted as gas reservoir in PEN based blends, lowering the foam density with respect to neat PEN. The dispersion of PEN drops in PES extended towards lower temperatures the PES foamability, allowing the nucleation and growth of bubbles and reducing the foam density. © 2014 AIP Publishing LLC.