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  • 1
    Online Resource
    Online Resource
    Graphite platelet films deposited by spray technique on low density polyethylene substrates
    Elsevier BV ; 2020
    In:  Materials Today: Proceedings Vol. 20 ( 2020), p. 87-90
    Details
    In: Materials Today: Proceedings, Elsevier BV, Vol. 20 ( 2020), p. 87-90
    Type of Medium: Online Resource
    ISSN: 2214-7853
    URL: Article
    DOI: 10.1016/j.matpr.2019.09.086
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
    detail.hit.zdb_id: 2797693-2
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  • 2
    Online Resource
    Online Resource
    Preparation and Characterization of Nanocomposite Thin Films for Optical Devices
    American Chemical Society (ACS) ; 1996
    In:  Industrial & Engineering Chemistry Research Vol. 35, No. 9 ( 1996-01-01), p. 2929-2932
    Details
    In: Industrial & Engineering Chemistry Research, American Chemical Society (ACS), Vol. 35, No. 9 ( 1996-01-01), p. 2929-2932
    Type of Medium: Online Resource
    ISSN: 0888-5885 , 1520-5045
    URL: Article
    DOI: 10.1021/ie950721k
    Language: English
    Publisher: American Chemical Society (ACS)
    Publication Date: 1996
    detail.hit.zdb_id: 1484436-9
    detail.hit.zdb_id: 56690-1
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  • 3
    Online Resource
    Online Resource
    No evidence for an effect on brain atrophy rate of atorvastatin add-on to interferon β1b therapy in relapsing–remitting multiple sclerosis (the ARIANNA study)
    SAGE Publications ; 2016
    In:  Multiple Sclerosis Journal Vol. 22, No. 9 ( 2016-08), p. 1163-1173
    Details
    In: Multiple Sclerosis Journal, SAGE Publications, Vol. 22, No. 9 ( 2016-08), p. 1163-1173
    Abstract: A previous phase 2 trial has suggested that statins might delay brain atrophy in secondary progressive multiple sclerosis. Objectives: The objective of this study was to evaluate the effect of atorvastatin add-on therapy on cerebral atrophy in relapsing–remitting multiple sclerosis. Methods: This randomised, placebo-controlled study compared atorvastatin 40 mg or placebo add-on therapy to interferon β1b for 24 months. Brain magnetic resonance imaging, multiple sclerosis functional composite score, Rao neuropsychological battery and expanded disability status scale were evaluated over 24 months. Results: A total of 154 patients were randomly assigned, 75 in the atorvastatin and 79 in the placebo arms, with a comparable drop-out rate (overall 23.4%). Brain atrophy over 2 years was not different in the two arms (−0.38% and −0.32% for the atorvastatin and placebo groups, respectively). Relapse rate, expanded disability status scale, multiple sclerosis functional composite score or cognitive changes were not different in the two arms. Patients withdrawing from the study had a higher number of relapses in the previous 2 years ( P=0.04) and a greater probability of relapsing within 12 months. Conclusions: Our results suggest that the combination of atorvastatin and interferon β1b is not justified in early relapsing–remitting multiple sclerosis and adds to the body of evidence indicating an absence of significant radiological and clinical benefit of statins in relapsing–remitting multiple sclerosis.
    Type of Medium: Online Resource
    ISSN: 1352-4585 , 1477-0970
    URL: Article
    DOI: 10.1177/1352458515611222
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2016
    detail.hit.zdb_id: 1290669-4
    detail.hit.zdb_id: 2008225-3
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  • 4
    Online Resource
    Online Resource
    Graphite nanoplatelet chemical cross-linking by elemental sulfur
    Springer Science and Business Media LLC ; 2013
    In:  Nanoscale Research Letters Vol. 8, No. 1 ( 2013-12)
    Details
    In: Nanoscale Research Letters, Springer Science and Business Media LLC, Vol. 8, No. 1 ( 2013-12)
    Abstract: Graphite nanoplatelets (GNPs) react with elemental sulfur to provide a mechanically stable, spongy material characterized by good electrical conductivity and high surface development; such unique property combination makes these novel nanostructured materials very useful for applications in different technological fields. The carbon-sulfur reaction can be accurately investigated by thermal analysis (differential scanning calorimetry and thermogravimetric analysis) and energy-dispersive X-ray spectroscopy combined with scanning electron microscopy. The thermal treatment required for the formation of electrically conductive monosulfur connections among the GNP unities has been investigated. PACS 81.05.Ue, 81.05.Rm, 81.16.Be
    Type of Medium: Online Resource
    ISSN: 1556-276X
    URL: Article
    DOI: 10.1186/1556-276X-8-94
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2013
    detail.hit.zdb_id: 2253244-4
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  • 5
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    Online Resource
    Conducting Polymer Nanocomposite for Energy Storage and Energy Harvesting Systems
    Wiley ; 2022
    In:  Advances in Materials Science and Engineering Vol. 2022 ( 2022-8-24), p. 1-23
    Details
    In: Advances in Materials Science and Engineering, Wiley, Vol. 2022 ( 2022-8-24), p. 1-23
    Abstract: Conducting polymers (CPs) have received a lot of attention because of their unique advantages over popular materials, such as universal and tunable electrical conductivity, simple invention approach, high mechanical strength, low weight, low price, and ease of processing. Polymer nanocomposites have been enthusiastically explored as superlative energy generators for low-power-consuming electronic strategies and confirmed progressive surface area, electronic conductivity, and amazing electrochemical behaviour through expanding the opportunity of utilization. The hybridization of conducting polymer with inorganic hybrid and organic nanomaterials also resulted in multifunctional hybrid nanocomposites with better capabilities in a variety of devices, including sensors, energy storage, energy harvesting, and defensive devices. The capability and assistance of modern advancements for the development of multifunctional nanomaterials/nanocomposites have been presented, as well as the approaches for producing nanostructured CPs. The mechanisms underlying their electrical conductivity, and ways for modifying their properties, are investigated. The ongoing research towards generating superior CP-based nanomaterials is also discussed. This assessment focuses on the important schemes involved in the scientific and industrial use of polymeric materials and nanocomposites intended for the scheme and manufacture of energy strategies such as solar cells, rechargeable batteries, supercapacitors, and energy cells, as well as the waiting problems and their prospects.
    Type of Medium: Online Resource
    ISSN: 1687-8442 , 1687-8434
    URL: Article
    DOI: 10.1155/2022/2266899
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2501025-6
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  • 6
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    Online Resource
    Thermoresistive Properties of Graphite Platelet Films Supported by Different Substrates
    MDPI AG ; 2019
    In:  Materials Vol. 12, No. 21 ( 2019-11-05), p. 3638-
    Details
    In: Materials, MDPI AG, Vol. 12, No. 21 ( 2019-11-05), p. 3638-
    Abstract: Large-area graphitic films, produced by an advantageous technique based on spraying a graphite lacquer on glass and low-density polyethylene (LDPE) substrates were studied for their thermoresistive applications. The spray technique uniformly covered the surface of the substrate by graphite platelet (GP) unities, which have a tendency to align parallel to the interfacial plane. Transmission electron microscopy analysis showed that the deposited films were composed of overlapped graphite platelets of different thickness, ranging from a few tens to hundreds of graphene layers, and Raman measurements provided evidence for a good graphitic quality of the material. The GP films deposited on glass and LDPE substrates exhibited different thermoresistive properties during cooling–heating cycles in the −40 to +40 °C range. Indeed, negative values of the temperature coefficient of resistance, ranging from −4 × 10−4 to −7 × 10−4 °C−1 have been observed on glass substrates, while positive values varying between 4 × 10−3 and 8 × 10−3 °C−1 were measured when the films were supported by LDPE. These behaviors were attributed to the different thermal expansion coefficients of the substrates. The appreciable thermoresistive properties of the graphite platelet films on LDPE could be useful for plastic electronic applications.
    Type of Medium: Online Resource
    ISSN: 1996-1944
    URL: Article
    DOI: 10.3390/ma12213638
    Language: English
    Publisher: MDPI AG
    Publication Date: 2019
    detail.hit.zdb_id: 2487261-1
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  • 7
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    Rapid Formation of Self‐Supporting Polydimethylsiloxane Sheets with Periodic Clusters of Embedded Nickel Nanoparticles
    Wiley ; 2021
    In:  Advanced Materials Interfaces Vol. 8, No. 9 ( 2021-05)
    Details
    In: Advanced Materials Interfaces, Wiley, Vol. 8, No. 9 ( 2021-05)
    Abstract: The direct and rapid formation of a precise pattern of metallic nanoparticles (NPs) supported and/or embedded in a flexible polymeric substrate is not easy to achive. However, the development of simpler and more reliable procedures is still highly desirable. This paper presents an innovative technique, simple, cheap, and robust, for producing a self‐supported sheet of polydimethylsiloxane (PDMS) embedding periodic arrays of clusters of nickel nanoparticles (NiNPs). The method uses the pyroelectric effect in a periodically poled lithium niobate (PPLN) crystal for producing a surface charge template able to address the patterning of the NPs by applying a simple thermal stimulation. The key advantages are rapidity, single‐step, and electrode‐free operation. The reliability of the technique is demonstrated for different geometries that are called here “dots” and “grid” and for three different periods 50, 200, and 400 µm. The resulting sheets are attractive for both their flexibility and magnetic properties that can be used for detection, entrapment, and/or patterning of micro‐ and nanoparticles in various fields such as microfluidics and biomedicine.
    Type of Medium: Online Resource
    ISSN: 2196-7350 , 2196-7350
    URL: Issue
    URL: Article
    DOI: 10.1002/admi.v8.9
    DOI: 10.1002/admi.202002216
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2750376-8
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  • 8
    Online Resource
    Online Resource
    Micro/Nanosilver Contribution in Modifying the Lubrication Film to Improve Friction and Wear Behaviors of TiAl-10 wt.%Ag Composite
    Wiley ; 2022
    In:  Advances in Materials Science and Engineering Vol. 2022 ( 2022-8-24), p. 1-11
    Details
    In: Advances in Materials Science and Engineering, Wiley, Vol. 2022 ( 2022-8-24), p. 1-11
    Abstract: Tribological performances of solid films are studied to improve their application range while retaining the longevity and high accuracy of TiAl alloy. For a ball-on-flat tribopair system, addition of micro/nanosilver improved the tribological behaviors of TiAl-10 wt.% Ag self-lubricating composite (TASC), compared to those of TiAl alloy. Notably, during microstructure evolution of the wear scar cross-section, a large amount of silver migrated from the TASC to the wear scar, and the silver distributions increased. This influx continuously enriched silver on the wear scar cross-section and formed a low-hardness lubrication film. Concurrently, a large amount of wear debris from the dry sliding wear contributed enough refinements to form a high hardness grain refinement layer. The results confirmed the formation of a 0.75 GPa hardness film with solid lubrication on a grain refined layer of 6.86 GPa hardness, resulting in excellent antifriction and wear resistance from 72 min to 90 min of the TASC. These results can help to evaluate the tribological characteristics for their commercial application and can conceptualize possible solutions for TiAl alloy-base components.
    Type of Medium: Online Resource
    ISSN: 1687-8442 , 1687-8434
    URL: Article
    DOI: 10.1155/2022/3169938
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2501025-6
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  • 9
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    Online Resource
    Reversible Thermochromic Nanocomposites Based on Thiolate-Capped Silver Nanoparticles Embedded in Amorphous Polystyrene
    MDPI AG ; 2009
    In:  Materials Vol. 2, No. 3 ( 2009-09-18), p. 1323-1340
    Details
    In: Materials, MDPI AG, Vol. 2, No. 3 ( 2009-09-18), p. 1323-1340
    Abstract: Technologically useful reversible thermochromic materials can be prepared using very simple polymer-embedded nanostructures. In particular, silver nanoparticles capped by long-chain alkyl-thiolate molecules (i.e., Agx(SCnH2n+1)y, with n 〉 10) spontaneously organize in aggregates because of the interdigitation phenomenon involving the linear alkyl chains bonded at surfaces of neighboring nanoparticles. Owing to the alkylchain interdigitation, nanoparticles very close to each other result and an interaction among their surface plasmon resonances may take place. Surface plasmon interaction causes a splitting of the absorption band whose characteristics depend on the aggregate shape. Since shape-less aggregates are generated, a multiple-splitting of the silver surface plasmon absorption band is observed, which causes a broad absorption spreading on the whole visible spectral region. Amorphous polystyrene containing interdigitated silver nanoparticles has a dark-brown or black coloration, depending on the nanoparticle numerical density, but since the inter-particle distance slightly increases at melting point of interdigitation crystallites a reversible termochromic effect is observed at this special temperature. In particular, the material coloration changes from dark-brown to yellow which is the coloration produced by the surface plasmon absorption of isolated silver nanoparticles. This reversible thermochromism can be finely controlled by modifying the structure of thiolate groups, and precisely, the strength of interactions acting inside the interdigitation crystallites.
    Type of Medium: Online Resource
    ISSN: 1996-1944
    URL: Article
    DOI: 10.3390/ma2031323
    Language: English
    Publisher: MDPI AG
    Publication Date: 2009
    detail.hit.zdb_id: 2487261-1
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  • 10
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    Online Resource
    Functional Polymeric Coatings for CsI(Tl) Scintillators
    MDPI AG ; 2021
    In:  Coatings Vol. 11, No. 11 ( 2021-10-21), p. 1279-
    Details
    In: Coatings, MDPI AG, Vol. 11, No. 11 ( 2021-10-21), p. 1279-
    Abstract: The handling of inorganic scintillators (e.g., alkali metal halides) can benefit from the availability of polymeric materials able to adhere to their surface. Polymeric materials, such as epoxy resins, can act as protective coatings, as adhesives for photodiodes to be connected with the scintillator surface, and as a matrix for functional fillers to improve the optical properties of scintillators. Here, the optical properties of two epoxy resins (E-30 by Prochima, and Technovit Epox by Heraeus Kulzer) deposited on the surface of a scintillator crystal made of CsI(Tl) were investigated, in order to improve the detection of high-energy radiation. It is found that these resins are capable of adhering to the surface of alkali metal halides. Adhesion, active at the epoxy–CsI(Tl) interface, can be explained on the basis of Coulomb forces acting between the ionic solid surface and an ionic intermediate of synthesis generated during the epoxy setting reaction. Technovit Epox showed higher transparency, and it was also functionalized by embedding white powdered pigments (PTFE or BaSO4) to achieve an optically reflective coating on the scintillator surface.
    Type of Medium: Online Resource
    ISSN: 2079-6412
    URL: Article
    DOI: 10.3390/coatings11111279
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2662314-6
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