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  • 1.
    Almqvist, Nils
    et al.
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.
    Thomson, Neil H.
    Smith, Bettye L.
    Stucky, Galen D.
    Morse, Daniel E.
    Hansma, Paul K.
    Methods for fabricating and characterizing a new generation of biomimetic materials1999Inngår i: Materials science & engineering. C, biomimetic materials, sensors and systems, ISSN 0928-4931, E-ISSN 1873-0191, Vol. 7, nr 1, s. 37-43Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Bringing together current ideas in the fields of biomineralization and composite laminate materials, we have attempted to fabricate model materials that mimic abalone nacre through the rapid assembly of inorganic tablets, such as talc. Several physical methods were tested to aid the orientation of the talc tablets in fluid suspensions with a low percentage, 10% by dry weight, of organic binding material. The orientation of talc tablets in the synthesized composites was characterized by X-ray diffraction and scanning electron microscopy. The modulus of rupture of the materials was measured in a three-point bending test. We demonstrate that the alignment of tablets increases by the use of physical methods and from chemical surface treatment. Important factors to consider in making materials that mimic abalone nacre are discussed. Important factors to consider in making materials that mimic abalone nacre are discussed.

  • 2.
    Gonella, F.
    et al.
    CNR-IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali.
    Canton, P.
    CNR-IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali.
    Cattaruzza, E.
    CNR-IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali.
    Quaranta, A.
    Dipartimento di Ingegneria dei Materiali e delle Tecnologie Industriali, Università di Trento.
    Sada, C.
    Dipartimento di Fisica Sperimentale, Università di Torino.
    Vomiero, Alberto
    CNR-INFM SENSOR Laboratory.
    Field-assisted ion diffusion of transition metals for the synthesis of nanocomposite silicate glasses2006Inngår i: Materials science & engineering. C, biomimetic materials, sensors and systems, ISSN 0928-4931, E-ISSN 1873-0191, Vol. 26, nr 5-7, s. 1087-1091Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Field-assisted ion diffusion of metals was realized for the controlled doping of silicate glasses. Metallic films deposited onto the substrates by the rf-sputtering technique were used as the metal ions source. In particular, cobalt was, for the first time, introduced into a soda-lime glass by field-assisted ion exchange, giving rise to diffusion profiles that were observed to depend on the preparation parameters, namely, temperature and electric field intensity across the samples. This technique, which allowed to dope the glass matrix with high metal concentration values, can be used as the first step in combined methodologies for the preparation of nanostructured glass composites. The shape of the measured Co diffusion profiles indicates that the migration process depends not only on the experimental parameters but also on the behavior of alkali ions within the glass. Chemical phenomena occurring at the metal/glass interface also play a significant role in the penetration of the Co ions. The possibility of doping the glass with two different metal species was also investigated, with the aim to create the condition for the formation of core-shell or alloy nanoclusters. In particular, preliminary results on Co + Au field-assisted co-diffusion are presented. © 2005 Elsevier B.V. All rights reserved.

  • 3.
    Maurizio, C.
    et al.
    INFM-OGG European Synchrotron Radiation Facility.
    Mattei, G.
    INFM-CNR Sensor Lab.
    Canton, P.
    CNR-IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali.
    Cattaruzza, E.
    INFM-CNR Sensor Lab.
    Fernández, C. de Julián
    INFM-CNR Sensor Lab.
    Mazzoldi, P.
    INFM-CNR Sensor Lab.
    D'Acapito, F.
    INFM-OGG European Synchrotron Radiation Facility.
    Battaglin, G.
    INFM-CNR Sensor Lab.
    Scian, C.
    INFM-CNR Sensor Lab.
    Vomiero, Alberto
    INFN Laboratori Nazionali di Legnaro.
    Thermal evolution of cobalt nanocrystals embedded in silica2007Inngår i: Materials science & engineering. C, biomimetic materials, sensors and systems, ISSN 0928-4931, E-ISSN 1873-0191, Vol. 27, nr 1, s. 193-196Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The structural evolution of cobalt nanoclusters synthesized in silica glass by ion implantation has been investigated upon thermal annealing. The samples were characterized by in-situ grazing incidence X-ray diffraction, exploiting a synchrotron radiation beam and following their evolution during thermal treatments in vacuo up to T = 800 °C. Before heating, the system is composed of hcp Co nanocrystals; we have not detected the transition from hcp to fcc structure that in the bulk phase occurs around 420 °C; nevertheless, the differences in the diffraction pattern recorded at T = 800 °C with respect to the corresponding one at room temperature suggest the presence of a second crystalline phase. © 2006 Elsevier B.V. All rights reserved.

  • 4.
    Mushtaq, Irrum
    et al.
    Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Mushtaq, Iram
    Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Akhter, Zareen
    Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Murtaza, Iram
    Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Qamar, Samina
    Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Ayub, Sidra
    Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Mirza, Bushra
    Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Butt, Tehmeena Maryum
    Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Janjua, Naveed Kausar
    Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
    Shah, Faiz Ullah
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Kemiteknik.
    Zaman, Farasat
    Department of Women's and Children's Health, Karolinska Institutet and Pediatric Endocrinology Unit, Karolinska University Hospital, Solna, Sweden.
    Engineering electroactive and biocompatible tetra(aniline)-based terpolymers with tunable intrinsic antioxidant properties in vivo2020Inngår i: Materials science & engineering. C, biomimetic materials, sensors and systems, ISSN 0928-4931, E-ISSN 1873-0191, Vol. 108, artikkel-id 110456Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Under different pathological conditions, high levels of reactive oxygen species (ROS) cause substantial damage to multiple organs. To counter these ROS levels in multiple organs, we have engineered highly potent novel terpolymers. We found that combination of FDA-approved polyethylene glycol, fumaric acid moieties and electroactive tetra(aniline) by varying the content of tetra(aniline) results into a novel drug composition with biologically active tunable intrinsic antioxidant properties. To test tunable intrinsic antioxidative properties of these engineered novel terpolymers, we used alloxan to induce diabetes in rats where ROS generation is known to be higher. The systemic administration of terpolymers to the diabetic rats showed strong electroactive antioxidant behavior which normalized ROS levels, enzymatic antioxidants including superoxide dismutase, catalase, but also reduced glutathione. As a proof-of-principle, we here show TANI based novel drug composition of terpolymers with tunable intrinsic antioxidant effects confirmed in multiple organs.

  • 5.
    Zairov, R.R.
    et al.
    Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Russian Federation. Kazan (Volga region) Federal University, Russian Federation..
    Dovzhenko, A.P.
    Kazan (Volga region) Federal University, Russian Federation.
    Sapunova, A.S.
    Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Russian Federation.
    Voloshina, A.D.
    Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Russian Federation.
    Tatarinov, D.A.
    Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Russian Federation.
    Nizameev, I.R.
    Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Russian Federation. Kazan National Research Technical University named after A.N. Tupolev - KAI, Russian Federation..
    Gubaidullin, A.T.
    Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Russian Federation.
    Petrov, K.A.
    Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Russian Federation.
    Enrichi, Francesco
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.
    Vomiero, Alberto
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap. Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Venezia-Mestre, Italy.
    Mustafina, A.R.
    Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Russian Federation.
    Dual red-NIR luminescent Eu–Yb heterolanthanide nanoparticles as promising basis for cellular imaging and sensing2019Inngår i: Materials science & engineering. C, biomimetic materials, sensors and systems, ISSN 0928-4931, E-ISSN 1873-0191, Vol. 105, artikkel-id 110057Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The present work introduces ternary Ln(III) (Ln = Eu, Yb, Lu) complexes with thenoyltriflouro1,3-diketonate (TTA−) and phosphine oxide derivative (PhO) as building blocks for core-shell nanoparticles with both Eu(III)- or Yb(III)-centered luminescence and the dual Eu(III)-Yb(III)-centered luminescence. Solvent-mediated self-assembly of the complexes is presented herein as the procedure for formation of Eu–Lu, Eu–Yb and Yb–Lu heterometallic or homometallic cores coated by hydrophilic polystyrenesulfonate-based shells. Steady state and time resolved Eu-centered luminescence in homolanthanide and heterolanthanide Eu–Lu and Eu–Yb cores is affected by Eu → Eu and Eu → Yb energy transfer due to a close proximity of the lanthanide blocks within the core of nanoparticles. The Eu → Yb energy transfer is highlighted to be the reason for the enhancement of the NIR Yb-centered luminescence. Efficient cellular uptake, low cytotoxicity towards normal and cancer cells, and sensing ability of Eu–Yb nanoparticles on lomefloxacin additives via both red and NIR channels make them promising as cellular imaging agents and sensors.

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