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  • Author(s):
    Chaochao Dun, Nicholas Kempf, Mortaza Saeidi-Javash, Chinathambi Karthik, Joseph Richardson, Courtney Hollar, David Estrada, Yanliang Zhang
    Abstract:

    Printing is a versatile method to transform semiconducting nanoparticle inks into functional and flexible devices. In particular, thermoelectric nanoparticles are attractive building blocks to fabricate flexible devices for energy harvesting and cooling applications. However, the performance of printed devices are plagued by poor interfacial connections between nanoparticles and resulting low carrier mobility. While many rigid bulk materials have shown a thermoelectric figure of merit ZT grea…

    Date Published:
    2019-07
    Record Visibility:
    Public
  • Author(s):
    Melissa Grupen-Shemansky
    Abstract:

    This report was developed under a DARPA contract for topic Atoms to products. Two primary goals were addressed in this project. In Focus Area 1 (Assembly Development) the goal was to assemble a 10 μm microelement consisting of an anisotropic lattice of ~5000 (~100 nm) dielectric nanoparticles (NPs) embedded in a polymer electrolyte. Successful completion of the objectives of this goal required that NPs be spatially located with nm-scale precision in a polymer matrix at scales up to ~10 μm (to…

    Date Created:
    2020-04-03
    Record Visibility:
    Public
    Resource Type
    Report
  • Author(s):
    Jiayu Liu, Ibrahem Jasim, Muhammad Roman, Yuyao Yang, Chuang Qu, Jie Huang, Edward Kinzel, Mahmoud Almasri
    Abstract:

    This paper presents a technique for the low-cost fabrication of plasmonic fiber-optic based refractive-index sensors. The Microsphere Photolithography (MPL) technique was used to pattern nanoholes in a thin aluminum film to create Extraordinary Optical Transmission (EOT) based sensors on the cleaved tip of SMF-28 optical fibers. This technique uses self-assembled microspheres as an optical element and facilitates very low-cost patterning of the plasmonic probes. As the refractive index of the…

    Date Published:
    2019-06
    Record Visibility:
    Public
  • Author(s):
    Hunter Ford, Laura Merrill, Jennifer Schaefer
    Abstract:

    Abstract: Rechargeable magnesium sulfur (Mg/S) batteries suffer from fast capacity fading due to difficulty of reoxidation of MgS and the polysulfide shuttle. Other works have reported that use of Cu current collectors or CuS at the cathode improves cycleability. Here we investigate Cu nanoparticles grown on carbon nanofibers (Cu@CNF) as an additive for the Mg/S battery cathode to test the effects of Cu metal on capacity and rate performance at controlled Cu loading. The Mg/S battery with Cu …

    Date Published:
    2019-10
    Record Visibility:
    Public
  • Author(s):
    Margaret L. Butzen, Jeremy B. Fein
    Abstract:

    In this study, we measured the effect of EPS on Cd and proton adsorption behaviors by measuring the extent of adsorption onto biomass with and without the EPS removed via a cation exchange resin. We conducted both Cd adsorption experiments and potentiometric titrations of biomass using three common bacterial species: one Gram-positive (Bacillus subtilis) and two Gram-negative (Shewanella oneidensis, Pseudomonas putida) species. The Cd adsorption experiments were con- ducted as a function of m…

    Date Published:
    2019-01
    Record Visibility:
    Public
  • Author(s):
    Douglas Shoue, Brianna Norris-Mulliins, Bruce Melancon, Miguel A. Morales, Mary Ann McDowell
    Abstract:

    Leishmania parasites are the causative agents of a wide spectrum of human diseases. The clinical mani- festations of leishmaniasis range from self-healing skin lesions to fatality. The World Health Organization has classed leishmaniasis as a category 1 neglected tropical disease. Leishmaniasis represents a major international health challenge, affecting 12 million people per year and with nearly 310 million people at risk. The first-line chemotherapies used to treat leishmaniasis are intraven…

    Date Published:
    2019-07
    Record Visibility:
    Public
  • Author(s):
    Eveline Rigo, Zhuxin Dong, Jae Hyun Park, Eamonn Kennedy, Mohammad Hokmabadi, Lisa Almonte-Garcia, Li Ding, Narayana Aluru, Gregory Timp
    Abstract:

    The size of an ion affects everything from the structure of water to life itself. In this report, to gauge their size, ions dissolved in water are forced electrically through a sub-nanometer- diameter pore spanning a thin membrane and the current is measured. The measurements reveal an ion-selective conductance that vanishes in poresThe size of an ion affects everything from the structure of water to life itself. In this report, to gauge their size, ions dissolved in water are forced electric…

    Date Published:
    2019-05
    Record Visibility:
    Public
  • Author(s):
    Muhammad Ahmad, Chao Tang, Liu Yang, Andriy Yaroshchuk, Merlin Bruening
    Abstract:

    Development of anion-exchange membranes (AEMs) with selectivities among anions may expand the applications of these membranes in salt separations. This work shows that layer-by-layer coating of aliphatic polyamide AEMs with poly(4-styrenesulfonate) (PSS)/protonated poly(allylamine) (PAH) films enhances Cl − /SO 42− dialysis selectivities, and the extent of this enhancement depends on the source-phase salt concentrations. For a source phase containing 0.01 M NaCl and 0.01 M Na 2 SO 4 and a rec…

    Date Published:
    2019-02
    Record Visibility:
    Public
  • Author(s):
    Chinedu Madukoma, Shusuke Tomoshige, Choonkeun Kim, Elan Lastochkin, William C. Boggess, Jed Fisher, Joshua Shrout, Shahriar Mobashery
    Abstract:

    The interplay between the activities of lytic transglycosylases (LTs) and penicillin-binding proteins (PBPs) is critical for the health of the bacterial cell wall. Bulgecin A (a natural-product inhibitor of LTs) potentiates the activity of β-lactam antibiotics (inhibitors of PBPs), underscoring this intimate mechanistic interdependence. Bulgecin A in the presence of an appropriate β-lactam causes bulge deformation due to the formation of aberrant peptidoglycan at the division site of the bact…

    Date Published:
    2019-01
    Record Visibility:
    Public
  • Author(s):
    Seung-Ryong Kwon, Donghoon Han, Paul Bohn
    Abstract:

    Conspectus Electrochemical measurements conducted in confined volumes provide a powerful and direct means to address scientific questions at the nexus of nanoscience, biotechnology, and chemical analysis. How are electron transfer and ion transport coupled in confined volumes and how does understanding them require moving beyond macroscopic theories? Also, how do these coupled processes impact electrochemical detection and processing? We address these questions by studying a special type of c…

    Date Published:
    2019-10
    Record Visibility:
    Public
  • Author(s):
    Holly Weiss-Bilka, Matthew Meagher, Joshua Gargac, Glen Niebur, Ryan Roeder, Diane Wagner
    Abstract:

    Background: Collagen-based scaffolds reinforced with hydroxyapatite (HA) are an attractive choice for bone tissue engineering because their composition mimics that of bone. We previously reported the development of compression-molded collagen-HA scaffolds that exhibited high porosity, interconnected pores, and mechanical properties that were well-suited for surgical handling and fixation. The objective of this study was to investigate these novel collagen-HA scaffolds in combination with huma…

    Date Published:
    2019-07
    Record Visibility:
    Public
  • Author(s):
    Gregory timp, Eamonn Kennedy, Zhuxin Dong, Clare Tennant
    Abstract:

    Disclosed are then inorganic membranes having a defined topography that includes pores having a defined diameter of nanometer and sub-nanometer diameter. The thin membranes are resistant to protein denaturing agents, and may be employed in analytical and clinical methods for identifying single amino acid residues within the sequence of a protein and the pores are other than NspA pores. Methods for making a thin inorganic membrane with nanopore and sub-nanopore topography and conical cone stru…

    Date Created:
    2019-02-28
    Record Visibility:
    Public
    Resource Type
    Document