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  • Author(s):
    Michael A. VendenBerg, Edgar Ruiz Bello, Calvin Nazareth, Matthew J. Webber
    Abstract:

    The self-assembly of oppositely charged oligopeptide mixtures is evaluated, observing self-sorting into distinct, yet still interacting, nanostructures.Significant efforts in the field of supramolecular materials have strived to co-assemble small molecules in order to realize individual nanostructures with multiple, tunable activities. The design of self-assembling motifs bearing opposite charges is one commonly used method, with favorable electrostatic interactions used to promote mixing in …

    Date Published:
    2019-08
  • Author(s):
    R. Marks, K. Doudrick
    Abstract:

    Chlorite (ClO 2 - ) is a disinfection byproduct formed during drinking water treatment when source waters with a high oxidant demand are disinfected with chlorine dioxide. This study investigated the reduction of… Chlorite (ClO 2 - ) is a disinfection byproduct formed during drinking water treatment when source waters with a high oxidant demand are disinfected with chlorine dioxide. This study investigated the reduction of ClO 2 - using a visible light (Vis) active photocatalyst, bismuth va…

    Date Published:
    2019-08
  • Author(s):
    Man Yang, Wei Lu, Renxi Jin, Xian-Chun Liu, Shuyan Song, Yan Xing
    Abstract:

    In this work, ZIF-67 is self-grown on the NiCo layered double hydroxide (NiCo-LDH) nanosheets-modified Ni foam (NF) surface. Its derivative, the hierarchically structured Co3O4/NiCo2O4/Ni foam (CO/NCO/NF) composite, is successfully fabricated by the oxidation of ZIF-67/NiCo-LDH/ NF, which exhibits excellent electrocatalytic performance. When assessed as an electrode for oxygen evolution reaction (OER), the CO/NCO/NF electrode shows low overpotentials of 320 and 407 mV at 10 and 50 mA cm−2, re…

    Date Published:
    2019-06
  • Author(s):
    Haylie L. Lobeck, Hrafn Traustason, Patrick Julien, John FitPatrick, Sara Mana, Jennifer Szymanowski, Peter Burns
    Abstract:

    The behaviours of two uranyl peroxide nanoclusters in water heated to 180 °C were examined by in situ Raman spectroscopy. Aqueous solutions containing the nanoscale uranyl peroxide cage clusters U 60 , [(UO 2 )(O 2 )(OH)] 60 60− , and U 60 Ox 30 , [{(UO 2 )(O 2 )} 60 (C 2 O 4 ) 30 ] 60− , were monitored by in situ Raman spectroscopy during stepwise heating to 180 °C. In solutions containing U 60 , clusters persist to 120 °C, although conversion of U 60 to U 24 , [(UO 2 )(O 2 )(OH)] 24 24− , o…

    Date Published:
    2019-04
  • Author(s):
    Yang Hu, Renxi Jin, Justin Easa, Wei Lu, Man Yang, Xianchun Liu, Yan Xing, Zhang Shi
    Abstract:

    Double-shell hollow nanofiber supported copper catalysts with strong metal–support interactions were prepared and applied in the reverse water–gas shift reaction. Highly active and stable copper catalysts were successfully achieved by in situ self-reduction treatment of hierarchical double-shell copper silicate hollow nanofibers. The coexistence of Cu 0 and Cu + species in the as-prepared catalysts demonstrated the strong metal–support interactions and endowed them with outstanding catalytic …

    Date Published:
    2019-05
  • Author(s):
    J. Kim, K. Doudrick
    Abstract:

    The adsorption and unfolding behavior of bovine serum albumin onto catalytic- and food-grade titanium dioxide nanoparticles is dependent on the surface chemistry of the nanoparticles and their environmental exposure history. The inherent physicochemical properties of engineered nanomaterials (ENMs) are known to control the sorption of proteins, but knowledge on how the release of ENMs to the environment prior to protein exposure affects this reaction is limited. In this study, time-resolved, …

    Date Published:
    2019-05
  • Author(s):
    R. Zhao, B. Grisafe, R. K. Ghosh, K. Wang, S. Datta, J. Robinson
    Abstract:

    The 1T phase of tantalum disulfide (1T-TaS 2 ) possesses a variety of charge-density-wave (CDW) orders, and as a result, it attracts an increasing amount of academic and technological interest. The 1T phase of tantalum disulfide (1T-TaS 2 ) possesses a variety of charge-density-wave (CDW) orders, and as a result, it attracts an increasing amount of academic and technological interest. Researchers have devoted tremendous efforts towards understanding the impacts of doping, alloying, intercalat…

    Date Published:
    2019-03
  • Author(s):
    T. Finamore, T. Curtis, J. V. Tedesco, K. Grandfield, R. Roeder
    Abstract:

    Gold nanoparticles and computed tomography were used synergistically to enable nondestructive, longitudinal, and volumetric measurement of collagen scaffold degradation. Biodegradable materials, such as collagen scaffolds, are used extensively in clinical medicine for tissue regeneration and/or as an implantable drug delivery vehicle. However, available methods to study biomaterial degradation are typically invasive, destructive, and/or non-volumetric. Therefore, the objective of this study w…

    Date Published:
    2019-02
  • Author(s):
    E. Raphael, D. H. Jara, M .A. Schiavon
    Abstract:

    Quantum dot-sensitized solar cells (QDSSCs) offer new opportunities to address the clean energy challenge, being one of the top candidates for third generation photovoltaics. Like dye-sensitized solar cells (DSSCs), QDSSCs normally use liquid electrolytes that suffer from issues such as evaporation or leakage. In this study a gel polysulfide electrolyte was prepared containing a natural polymer, agar, and was used as a quasi-solid-state electrolyte in solar cells to replace the conventional l…

    Date Published:
    2017
  • Author(s):
    Shirui Luo, Jarrod Schiffbauer, Tengfei Luo
    Abstract:

    In this work, the droplet size in a water-in-oil emulsion obtained by supersaturation is studied. The emulsion is obtained by cooling down a saturated water/oil solution by a certain temperature difference. The effects of the cooling rate and temperature difference on the produced droplet size are experimentally investigated. The average size of water droplets in the emulsion is found to be proportional to the square root of the cooling rate. By analyzing the time scales of three different st…

    Date Published:
    2017
  • Author(s):
    Shirou Lou, Jarrod Schiffbauer, Tengfei Lou
    Abstract:

    In this work, the droplet size in a water-in-oil emulsion obtained by supersaturation is studied. The emulsion is obtained by cooling down a saturated water/oil solution by a certain temperature difference. The effects of the cooling rate and temperature difference on the produced droplet size are experimentally investigated. The average size of water droplets in the emulsion is found to be proportional to the square root of the cooling rate. By analyzing the time scales of three different st…

    Date Published:
    2017-10