Now showing items 1-20 of 79

    • Block copolymer directed synthesis of mesoporous TiO2 for dye-sensitized solar cells 

      Nedelcu, M.; Lee, J.; Crossland, E.J.W.; Warren, S.C.; Christopher Orilall, M.; Guldin, S.; Huttner, S.; Ducati, C.; Eder, D.; Wiesner, U.B.; Steiner, U.; Snaith, H.J. (The Royal Society of Chemistry, 2008-11-07)
      The morphology of TiO2 plays an important role in the operation of solid-state dye-sensitized solar cells. By using polyisoprene-block-ethyleneoxide (PI-b-PEO) copolymers as structure directing agents for a sol-gel based ...
    • Block copolymer directed synthesis of mesoporous TiO2 for dye-sensitized solar cells 

      Nedelcu, M.; Lee, J.; Crossland, E.J.W.; Warren, S.C.; Orilall, M.C.; Guldin, S.; Huttner, S.; Ducati, C.; Eder, D.; Wiesner, U.; Steiner, U.; Snaith, H.J. (The Royal Society of Chemistry, 2008-11-07)
      The morphology of TiO2 plays an important role in the operation of solid-state dye-sensitized solar cells. By using polyisoprene-block-ethyleneoxide (PI-b-PEO) copolymers as structure directing agents for a sol-gel based ...
    • A Bicontinuous Double Gyroid Hybrid Solar Cell 

      Crossland, E.J.W.; Kamperman, M.; Nedelcu, M.; Ducati, C.; Wiesner, U.; Smilgies, D.-M.; Toombes, G.E.S.; Hillmyer, M.A.; Ludwigs, S.; Steiner, U.; Snaith, H.J. (Soft Matter, 2008-11-07)
      The morphology of TiO2 plays an important role in the operation of solid-state dy-sensitized solar cells. By using polyisoprene-block-ethyleneoxide (PI-b-PEO) copolymers as structure directing agents for a sol-gel based ...
    • High Resolution Shear Profile Measurements in Entangled Polymers 

      Hayes, K.A.; Buckley, M.R.; Cohen, I.; Archer, L.A. (Physical Review Letters, 2008-11-17)
      We use confocal microscopy and particle image velocimetry to visualize motion of 250-300 nm. fluorescent tracer particles in entangled polymers subject to a rectilinear shear flow. Our results show linear velocity profiles ...
    • Nanoscale Ionic Materials, NIMS 

      Rodriguez, R.; Herrara, R.; Archer, L.A.; Giannelis, E.P. (WILEY-V C H VERLAG GMBH, 2008-11-18)
      Polymer nanocomposites (nanoparticles dispersed in a polymer matrix) have been the subject of intense research for almost two decades in both academic and industrial settings. This interest has been fueled by the ability ...
    • Designed Synthesis of coaxial SnO₂@carbon hollow nanospheres for highly reversible lithium storage 

      Lou, X.W.; Li, C.M.; Archer, L.A. (WILEY-V C H VERLAG GMBH, 2009-03-25)
      A proof-of-concept structural design is demonstrated for high-capacity lithium-ion batteries anode materials by multistep synthesis of coaxial SnO2@coarbon hollow nanospheres. This material integrates two beneficial features: ...
    • Nafion-clay hybrids with a network structure 

      Burgaz, E.; Lian, H.; Alonso, H.; Estevez, L.; Kelarakis, A.; Giannelis, E.P. (ELSEVIER SCI LTD, 2009-05-22)
      Nafion-clay hybrid membranes with a unique microstructure were synthesized using a fundamentally new approach. The new approach is based on depletion aggregation of suspended particles - a wellknown phenomenon in colloids. ...
    • Nafion-clay nanocomposite membranes: Morphology and properties 

      Alonso, R.H.; Estevez, L.; Lian, H.Q.; Kelarakis, A.; Giannelis, E.P. (ELSEVIER SCI LTD, 2009-05-22)
      A series of Nafion-clay nanocomposite membranes were synthesized and characterized. To minimize any adverse effects on ionic conductivity the clay nanoparticles were HI exchanged prior to mixing with Nafion. Well-dispersed, ...
    • Nafion/Clay Hybrids with a Network Structure 

      Burgaz, E.; Lian, H.; Alonso, H.; Estevez, L.; Kelarakis, A.; Giannelis, E.P. (ELSEVIER SCI LTD, 2009-05-22)
      Nafion-clay hybrid membranes with a unique microstructure were synthesized using a fundamentally new approach. The new approach is based on depletion aggregation of suspended particles - a wellknown phenomenon in colloids. ...
    • Miscibility-Dispersion, Interfacial Strength and Nanoclay Mobility Relationships in Polymer Nanocomposites 

      Carretero-González, J.; Retsos, H.; Giannelis, E.P.; Ezquerra, T.A.; Hernández, M.; López-Manchado, M.A. (ROYAL SOC CHEMISTRY, 2009-07-08)
      Fully dispersed layered silicate nanoparticles (nanoclay) in a polymer matrix have provided a new class of multi-functional materials exhibiting several performance improvements over conventional composites. Yet the ...
    • Transition Path Sampling and Forward Flux Sampling. Applications to Biological Systems. 

      Escobedo, F.A.; Borrero, E.E.; Araque, J.C. (Journal of Physics: Condensed Matter, 2009-07-13)
      The last decade has seen a rapid growth in the number of simulation methods and applications dealing with the sampling of transition pathways of rare nanoscale events. Such studies are crucial, for example, for understanding ...
    • Preparation and Properties of Biodegradable Starch-clay Nanocomposites 

      Chung, Yi-Lin; Ansari, Seema; Estevez, Luis; Hayrapetyan, Suren; Giannelis, Emmanuel P.; Lai, Hsi-Mei (Elsevier Ltd., 2009-08-20)
      Well-dispersed starch–clay nanocomposites were prepared by adding a dilute clay dispersion to a solution of starch followed by coprecipitation in ethanol. The clay didn’t significantly influence the type of crystalline ...
    • Solvent-mediated Pathways to Gelation and Phase Separation in Suspensions of Grafted Nanoparticles 

      Anyfantakis, Manos; Bourlinos, Athanasios; Vlassopoulos, Dimitris; Fytas, George; Giannelis, Emmanuel P.; Kumar, Sanat K. (Royal Society of Chemistry, 2009-08-27)
      We explore the role of the solvent medium on the interplay between gelation and phase separation in suspensions of organosilicate planar hybrids grafted with hydrocarbon chains. We establish their phase diagram by means ...
    • A plasmonic fluid with dynamically tunable optical properties 

      Bhattacharjee, R.R.; Li, R.; Estevez, L.; Smilgies, D-M.; Amassian, A.; Giannelis, E.P.G. (RSC Publishing, 2009-10-19)
      We report the first synthesis of a gold nanorod (GNR)-based nanocomposite that exhibits solid-like plasmonic properties while behaving in a liquid-like manner. Tuning the degree of GNR clustering controls the material's ...
    • Clay nanocomposites based on poly(vinylidene fluoride-co-hexafluoropropylene): Structure and properties 

      Kelarakis, A.; Hayrapetyan, S.; Ansari, S.; Fang, J.; Estevez, L.; Giannelis, E.P. (ELSEVIER SCI LTD, 2009-12-02)
      Structure-properties relationships in poly(vinylidene fluoride-co-hexafluoropropylene), PVDF-HFP, clay nanocomposites are reported for the first time. Addition of organically modified clays to PVDF-HFP promotes an α to β ...
    • Monolithic Route to Efficient Dye-sensitized Solar Cells Employing Diblock Copolymers for Mesoporous TiO2 

      Nedelcu, Mihaela; Guldin, Stefan; Orilall, M. Christopher; Lee, Jinwoo; Huttner, Sven; Crossland, Edward J.W.; Warren, Scott C.; Ducati, Caterina; Laity, Pete R.; Eder, Dominik; Wiesner, Ulrich; Steiner, Ullrich; Snaith, Henry J. (Royal Society of Chemistry, 2009-12-23)
      We present a material and device based study on the fabrication of mesoporous TiO2 and its integration into dye-sensitized solar cells. Poly(isoprene-block-ethyleneoxide) (PI-b-PEO) copolymers were used as structure directing ...
    • Direct Measurements of Island Growth and Step-Edge Barriers in Colloidal Epitaxy 

      Ganapathy, R.; Buckley, M.R.; Gerbode, S.J.; Cohen, I. (AMER ASSOC ADVANCEMENT SCIENCE, 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA, 2010-01-22)
      Epitaxial growth, a bottom-up self-assembly process for creating surface nano-and microstructures, has been extensively studied in the context of atoms. This process, however, is also a promising route to self-assembly of ...
    • Superhydrophilic and solvent resistant coatings on polypropylene fabrics by a simple deposition process 

      Fang, J.; Kelarakis, A.; Estevez, L.; Wang, Y.; Rodriguez, R.; Giannelis, E.P. (ROYAL SOC CHEMISTRY, 2010-02-01)
      A simple, yet general coating method to plasma treated polymeric substrates is presented. The method is based on electrostatic interactions between the surface functionalized nanoparticles and the charged substrate and ...
    • The synthesis and properties of nanoscale ionic materials 

      Rodriguez, R.; Herrera, R.; Bourlinos, A.; Li, R.; Amassian, A.; Archer, L.A.; Giannelis, E.P. (John Wiley & Sons, Ltd., 2010-02-17)
      In this article we discuss the effect of constituents on structure, flow, and thermal properties of nanoscale ionic materials (NIMs). NIMs are a new class of nanohybrids consisting of a nanometer-sized core, a charged ...
    • Isospecific Polymerization of Racemic Epoxides: a Catalyst System for the Synthesis of Highly Isotactic Polyethers 

      Widger, Peter C.B.; Ahmed, Syud M.; Hirahata, Wataru; Thomas, Renee M.; Lobkovsky, Emil B.; Coates, Geoffrey W. (Royal Society of Chemistry, 2010-03-22)
      A highly active bimetallic cobalt catalyst system is reported for the polymerization of racemic terminal epoxides to yield isotactic polyethers.