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  • Author(s):
    P. J. McGinn
    Abstract:

    High-throughput combinatorial investigations are transforming materials discovery, phase diagram development, and processing optimization. Thin-film deposition techniques are frequently used to fabricate sample libraries employed in these studies. Various adaptations of well-known thin-film chemical vapor deposition (CVD) and physical vapor deposition (PVD) techniques utilized for the synthesis of inorganic combinatorial thin-film materials libraries are reviewed, with novel processing approa…

    Date Published:
    2019-06
  • 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):
    R. Scheidt, B. Seger, P. Kamat
    Abstract:

    MAPbBr3 and MAPbI3 films cast onto glass slides and physically paired together undergo halide exchange to form mixed halide films. The change in halide composition in these two ∼130 nm thick films occurs concurrently with Br− diffusing toward the MAPbI3 film and I− diffusing toward the MAPbBr3 film. The diffusion of these halide species, which is tracked through changes in the absorption, offers a direct measurement of thermally activated halide diffusion in perovskite films. The increase in …

    Date Published:
    2019-07
  • Author(s):
    J. T. Miller, V. Danghyan, A. S. Mukasyan, E. E.Wolf
    Abstract:

    We report on the high activity and stability towards deactivation during ethanol decomposition of mono (Ni, Cu) and bimetallic Ni-Cu catalysts supported on ceria and silica that were prepared by impregnated support solution combustion synthesis (ISCS). Ni supported on ceria, behaves much like bulk Ni, as it deactivates within a few hours of time on stream (TOS). Addition of Cu improves the stability of ceria supported Ni-Cu bimetallic catalysts but it still deactivates during 10 h of TOS. Ni …

    Date Published:
    2018-12
  • Author(s):
    A. E. Deatsch, A. J. Shogren, S. P. Egan, J. L. Tank, N. Sun, S. T. Ruggiero, C. E. Tanner
    Abstract:

    Rapid, sensitive, and quantitative protein detection is critical for many applications in medicine, environmental monitoring, and the food industry. Advancements in detection of proteins include the use of antigen-antibody binding; however, many current methods are time-consuming and have limiting factors such as low sensitivity and the inability to provide absolute values. We present a new high-throughput method for protein detection using light transmission spectroscopy (LTS), which can qua…

    Date Published:
    2019-02
  • Author(s):
    S. J. Yoon, H. Kim, J. Lee, P. Kamat
    Abstract:

    ABSTRACT: Intrinsic low stability and short excited lifetimes associated with Ag nanoclusters (NCs) are major hurdles that have prevented the full utilization of the many advantages of Ag NCs over their longtime contender, Au NCs, in light energy conversion systems. In this report, we diagnosed the problems of conventional thiolated Ag NCs used for solar cell applications and developed a new synthesis route to form aggregation-induced emission (AIE)- type Ag NCs that can significantly overcom…

    Date Published:
    2019
  • Author(s):
    Kimberly Rollings, Nancy Wells
    Abstract:

    Strategies to reduce childhood obesity and improve nutrition include creating school food environments that promote healthy eating. Despite well-documented health benefits of fruit and vegetable (FV) consumption, many U.S. school-aged children, especially low-income youth, fail to meet national dietary guidelines for FV intake. The Cafeteria Assessment for Elementary Schools (CAFES) was developed to quantify physical attributes of elementary school cafeteria environments associated with stude…

  • Author(s):
    Kimberly Rollings, Gary Evans
    Abstract:

    Chronic crowding within housing adversely affects psychological well-being, yet little is known about how design attributes contribute to these effects, especially among children. This cross-sectional study first examined associations between residential interior density and children’s (M = 9 years of age) perceived bedroom and home crowding. Second, analyses investigated whether interior design attributes (residential floor plan arrangement measured by space syntax [depth and permeability]; …

    Date Published:
    2019
  • Author(s):
    Matthew Sisk
    Abstract:

    Lead exposure is a major health hazard affecting children and their growth and is a concern in many urban areas around the world. One such city in the United States (US), South Bend Indiana, gained attention for its high levels of lead in blood and relatively low testing rates for children. We assessed current lead screening practices in South Bend and the surrounding St. Joseph County (SJC). The 2005–2015 lead screening data included 18,526 unique children. Lead screening rates ranged from 4…

  • Author(s):
    Giordano B. S. Ferreira, Matthias Scheutz, Sunny K. Boyd
    Abstract:

    Decisions about the choice of a mate can greatly impact both individual fitness and selection processes. We developed a novel agent-based model to investigate two common mate choice rules that may be used by female gray treefrogs (Hyla versicolor). In this model environment, female agents using the minimum-threshold strategy found higher quality mates and traveled shorter distances on average, compared with female agents using the best-of-n strategy. Females using the minimum-threshold stra…

    Date Published:
    2018-08
  • Author(s):
    Pavel Brodskiy, Qinfeng Wu, Francisco Huizar, Dharsan Soundarrajan, Cody Narciso, Jeremiah Zartman
    Abstract:

    Organ development is driven by a set of patterned inductive signals. However, how these signals are integrated to coordinate tissue patterning is still poorly understood. Calcium ions (Ca2+) are critical signaling components involved in signal integration and are regulated by a core Ca2+ signaling toolkit. Ca2+ signaling encodes a significant fraction of information in cells through both amplitude and frequency-dependent regulation of transcription factors and key regulatory enzymes. A range …

  • Author(s):
    Aquino, H. R. O., Rouvimov, S., Orlov, A., Porod, W., Bernstein, G. H.
    Abstract:

    The authors performed several studies on the quality of yttrium iron garnet thin films grown on silicon dioxide via radio frequency magnetron sputtering. The use of rapid thermal annealing as the postdeposition anneal was explored for different thicknesses, and a surprisingly narrow temperature window was found to produce the highest saturation magnetization for ultrathin films. Transmission electron microscopy imaging visually shows a correlation between the saturation magnetization, and the…

    Date Published:
    2018