Now showing items 1-20 of 79

    • Aerosol Assisted Synthesis of Hierarchical Tin-carbon Composites and their Application as Lithium Battery Anode Materials 

      Guo, Juchen; Yang, Zichao; Archer, Lynden (J Mater: Chem A, 2013-06-26)
      We report a method for synthesizing hierarchically structured tin–carbon (Sn–C) composites via aerosol spray pyrolysis. In this method, an aqueous precursor solution containing tin(II) chloride and sucrose is atomized, and ...
    • Aseembly of Vorticity-Aligned Hard-Sphere Colloidal Strings in a Simple Shear Flow 

      Cheng, X.; Xu, X.; Rice, S.A.; Dinner, A.R.; Cohen, I. (Proceedings of the National Academy of Sciences of the United States of America, 2011-12-23)
      Colloidal suspensions self-assemble into equilibrium structures ranging from face- and body-centered cubic crystals to binary ionic crystals, and even kagome lattices. When driven out of equilibrium by hydrodynamic ...
    • Assessing Preferential Flow by Simultaneously Injecting Nanoparticle and Chemical Tracers 

      Cathles, L.M.; Subramanian, S.K.; Li, V.Y. (WATER RESOURCES RESEARCH, 2013-01-10)
      The exact manner in which preferential (e.g., much faster than average) flow occurs in the subsurface through small fractures or permeable connected pathways of other kinds is important to many processes but is difficult ...
    • 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 ...
    • 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 ...
    • Bright Infrared Quantum-dot Light-emitting Diodes Through Inter-dot Spacing Control 

      Sun, L.; Choi, J.J.; Stachnik, D.; Bartnik, A.C.; Hyun, B-R.; Malliaras, G.G.; Hanrath, T.; Wise, F.W. (Nature Nanotechnology, 2012-05-06)
      Infrared light-emitting diodes are currently fabricated from direct-gap semiconductors using epitaxy, which makes them expensive and difficult to integrate with other materials. Light-emitting diodes based on colloidal ...
    • Canopy Dynamics in Nanoscale Ionic Materials 

      Jesperson, M.L.; Mirau, P.A.; Meerwal, R.A.; Vaia, R.A.; Rodriguez, R.; Giannelis, E.P. (American Chemical Society, 2010-06-10)
      Nanoscale ionic materials (NIMS) are organic inorganic hybrids in which a core nanostructure is functionalized with a covalently attached corona and an ionically tethered organic canopy. NIMS are engineered to be liquids ...
    • Carbon Dioxide Assist for Non-aqueous Sodium-oxygen Batteries 

      Das, Shyamal; Xu, Shaomao; Archer, Lynden (Electrochemistry Communications, 2013-02-10)
      We report a novel non-aqueous Na–air battery that utilizes a gas mixture of CO2 and O2. The battery exhibits a high specific energy of 6500–7000 Whkg− 1 (based on the carbon mass) over a range of CO2 feed compositions. The ...
    • Chemical Engineering in the Electronics Industry: Progress Towards the Rational Design of Organic Semiconductor Heterojunctions 

      Clancy, Paulette (Current Opinion in Chemical Engineering, 2012-05-04)
      Design of the heterojunction in all-organic solar cells is a critical aspect of understanding and controlling charge transport characteristics. The use of multiscale computational approaches has an important role to play ...
    • Chloride Adsorption by Calcined Layered Double Hydroxides in Hardened Portland Cement Paste 

      Yoon, Seyoon; Moon, Juhyuk; Bae, Sungchul; Duan, Xiaonan; Giannelis, Emmanuel; Monteiro, Paulo (Materials Chemistry and PHysics, 2014-02-13)
      This study investigated the feasibility of using calcined layered double hydroxides (CLDHs) to prevent chloride-induced deterioration in reinforced concrete. CLDHs not only adsorbed chloride ions in aqueous solution with ...
    • 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 ...
    • Constructing Hierarchical Spheres from Large Ultrathin Anatase TiO2 Nanosheets with Nearly 100% Exposed (001) Facets for Fast Reversible Lithium Storage 

      Chen, J.S.; Tan, Y.L.; Li, C.M.; Cheah, Y.L.; Madhavi, S.; Boey, F.Y.C.; Archer, L.A.; Lou, X.W. (AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2010-04-14)
      Synthesis of nanocrystals with exposed high-energy facets is a well-known challenge in many fields of science and technology. The higher reactivity of these facets simultaneously makes them desirable catalysts for sluggish ...
    • Crowded, Confined, and Frustrated: Dynamics of Molecules Tethered to Nanoparticles 

      Agarwal, Praveen; Kim, Sung A; Archer, Lynden (Physical Review Letters, 2012-12-19)
      Above a critical chemistry-dependent molecular weight, all polymer molecules entangle and, as a result, exhibit slow dynamics, enhanced viscosity, and elasticity. Herein we report on the dynamics of low molecular weight ...
    • Crystallization and unusual rheological behavior in poly(ethylene oxide)-clay nanocomposites 

      Kelarakis, A.; Giannelis, E.P. (Elsevier, 2011-05-04)
      We report a systematic study of the crystallization and theological behavior of poly(ethylene oxide) (PEO)-clay nanocomposites. To that end a series of nanocomposites based on PEOs of different molecular weight (10(3) < ...
    • Deposition of LDH on Plasm Treateed Polylactic Acid to Reduce Water Permeability 

      Bugatti, Valeria; Livi, Sebastien; Hayrapetyan, Suren; Wang, Yue; Estevez, Luis; Vittoria, Vittoria; Giannelis, Emmanuel (Journal of Colloid and Interfcae Science, 2013-04-04)
      A simple and scalable deposition process was developed to prepare polylactic acid (PLA) coatings with enhanced water barrier properties for food packaging applications. This method based on electrostatic interactions between ...
    • 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: ...
    • Diffusive Dynamics of Nanoparticles in Aqueous Dispersions 

      He, Kai; Spannuth, Melissa; Conrad, Jacinta; Krishnamoorti, Ramanan (Soft Matter, 2012-10-04)
      The diffusive dynamics of 100 nm to 400 nm diameter polystyrene nanoparticles dispersed in water were studied using brightfield and fluorescence based differential dynamic microscopy (DDM) and compared to those obtained ...
    • Diffusivities and Viscosities of Poly(ethylene oxide) Oligomers 

      Hong, B.; Escobedo, F.; Panagiotopoulos, A.Z. (Journal of Chemical & Engineering Data, American Chemical Society, 2010-06-22)
      Diffusivities and viscosities of poly(ethylene oxide) (PEO) oligomer melts of 1 to 12 repeat units have been obtained from equilibrium molecular dynamics simulations using the TraPPE-UA force field. The simulations generate ...
    • Diffusivities, viscosities, and conductivities of solvent-free ionically grafted nanoparticles 

      Hong, Bingbing; Panagiotopoulos, Athanassios (Soft Matter, 2013-05-28)
      A new class of conductive composite materials, solvent-free ionically grafted nanoparticles, were modeled by coarse-grained molecular dynamics methods. The grafted oligomeric counterions were observed to migrate between ...