Integrated Imaging Facility

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  • Author(s):
    Stefano Toso, Ilia Pavlovetc, Maksym Zhukovskyi, Sergio Marras, Masaru Kuno, Liberato Mann, Dmitry Baranov
    Abstract:

    Perovskite nanocrystal superlattices (NC SLs) are the nearest real-world approximations to monodisperse NC ensembles. NC SLs thus represent ideal model systems for evaluating the optical and structural stability of CsPb(I1−xBrx)3 NCs at a macroscopic level. Here, photoinduced changes to CsPb(I1−xBrx)3 NC SLs (0 < x < 1.0) are probed via in situ photoluminescence, X-ray diffraction, and electron microscopy. We find that prolonged (∼10−20 h) ultraviolet−visible irradiation causes irrevers…

    Date Published:
    2020-11
    Record Visibility:
    Public
  • Author(s):
    Quinnan Zhang, Shuangjiang Luo, Jennifer Weidman, Ruilan Guo
    Abstract:

    Abstract Zeolite imidazole framework (ZIF-90) nanoparticles were chemically modified by grafting triptycene moieties. The modified nanoparticles were introduced into a triptycene-based polyimide as fillers to generate mixed matrix membranes (MMMs) for gas separation. The incorporation of “hook-like” triptycene moieties in both dispersed and continuous phases led to intimate contact between the two phases and thus defect-free interfacial morphology, due to the supramolecular interlocking and π…

    Date Published:
    2020-07
    Record Visibility:
    Public
  • Author(s):
    Enrico Speri, Jeshina Janardhanan, Cesar Masitas, Valerie Schroeder, Elena Lastochkin, William Wolter, Jed Fisher, Shahriar Mobashery, Mayland Chang
    Abstract:

    A major challenge for chemotherapy of bacterial infections is perturbation of the intestinal microbiota. Clostridioides difficile is a Gram-positive bacterium of the gut that can thrive under this circumstance. Its production of dormant and antibiotic-impervious spores results in chronic disruption of normal gut flora and debilitating diarrhea and intestinal infection. C. difficile is responsible for 12,800 deaths per year in the United States. Here, we report the discovery of 2-(4-(3-(triflu…

    Date Published:
    2020-11
    Record Visibility:
    Public
  • Author(s):
    Seung-Ryong Kwon, Seol Baek, Kaiyu Fu, Paul Bohn
    Abstract:

    Understanding water behavior in confined volumes is important in applications ranging from water purification to healthcare devices. Especially relevant are wetting and dewetting phenomena which can be switched by external stimuli, such as light and electric fields. Here, these behaviors are exploited for electrochemical processing by voltage-directed ion transport in nanochannels contained within nanopore arrays in which each nanopore presents three electrodes. The top and middle electrodes …

    Date Published:
    2020-04
    Record Visibility:
    Public
  • Author(s):
    Minxiang Zeng, Wenzheng Kuang, Irfan Khan, Dali Huang, Yipu Du, Mortaza Seidi-Javash, Lecheng Zhang, Zhengdong Cheng, Anthony Hoffman, Yanliang Zhang
    Abstract:

    Printing techniques using nanomaterials have emerged as a versatile tool for fast prototyping and potentially large-scale manufacturing of functional devices. Surfactants play a significant role in many printing processes due to their ability to reduce interfacial tension between ink solvents and nanoparticles and thus improve ink colloidal stability. Here, a colloidal graphene quantum dot (GQD)-based nanosurfactant is reported to stabilize various types of 2D materials in aqueous inks. In pa…

    Date Published:
    2020-11
    Record Visibility:
    Public
  • Author(s):
    Yini Zhu, Jiling Wen, Jiling Huang, Jackson Mittlesteadt, Xiaofei Wen, XinLu
    Abstract:

    Background: Recent genomic profiling has identified a subtype of prostate cancer (PCa) characterized by two key genetic alterations: missense mutation of speckle-type POZ protein (SPOP) and homozygous deletion of chromodomain helicase DNA-binding protein 1 (CHD1). Mutually exclusive with E26 transformation-specific (ETS) rearrangements, this subtype displays high genomic instability. Previous studies indicate that deficient SPOP or CHD1 alone leads to feeble prostate abnormalities and each pr…

    Date Published:
    2020-09
    Record Visibility:
    Public
  • Author(s):
    Eduard Aleksanyan, Ani Aprahamian, Alexander S. Mukasyan, Vachagan Harutyunyan, Khachatur Manukyan
    Abstract:

    Cesium lead iodide with cubic perovskite structure (a-CsPbI3) is gaining sig- nificant interest in photovoltaic applications due to its excellent absorbance of the visible solar light and other attractive optoelectronic properties. However, the synthesis of stable a-CsPbI3 poses a significant challenge. Mechanochemical synthesis is emerging as a suitable method for the preparation of cesium lead halides. This work investigates the ball milling-induced synthesis of cesium lead halides perovski…

    Date Published:
    2020-04
    Record Visibility:
    Public
  • Author(s):
    Bumjun Park, Jennifer Schaefer
    Abstract:

    Batteries based on alternatives to lithium are now of global research interest. Magnesium metal batteries are particularly attractive for their potential high energy density. Polymer electrolytes for high density rechargeable batteries have been sought for decades, due to their improved thermal stability compared with liquids and their lower density and cost compared with inorganic solids. Yet, little success has so far been realized in polymer electrolytes for magnesium metal batteries. In t…

    Date Published:
    2020-03
    Record Visibility:
    Public
  • Author(s):
    Tyler Curtis, Ryan Roeder
    Abstract:

    Mammographic screening for breast cancer is unable to distinguish molecular differences between hydroxyapatite (HA) microcalcifications (μcals) that are associated with malignancy and calcium oxalate (CaOx) μcals that are benign. Therefore, the objective of this study was to investigate quantitative material decomposition of model breast μcals of clinically-relevant composition and size using spectral photon-counting computed tomography (PCCT). Model μcals composed of HA, CaOx, and dicalcium …

    Date Published:
    2020-09
    Record Visibility:
    Public
  • Author(s):
    Marwa Asem, Allison Young, Carlysa Oyama, Alejandro ClaureDeLaZerda, Yueying Liu, Matthew Ravosa, Vijayalaxmi Gupta, Andrea Jewell, Dineo Khabele, Sharon Stack
    Abstract:

    The majority of women with recurrent ovarian cancer (OvCa) develop malignant ascites with volumes that can reach > 2 L. The resulting elevation in intraperitoneal pressure (IPP), from normal values of 5 mmHg to as high as 22 mmHg, causes striking changes in the loading environment in the peritoneal cavity. The effect of ascites-induced changes in IPP on OvCa progression is largely unknown. Herein we model the functional consequences of ascites-induced compression on ovarian tumor cells and…

    Date Published:
    2020-07
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    Public
  • Author(s):
    Robert Hughes, Trevor Demille, Svetlana Neretina
    Abstract:

    The functionality of well-tailored nanomaterials can only be retained if they are robust to the environmental factors in which they operate. The inability of Cu to withstand such factors is largely responsible for its current status as a second-tier plasmonic nanomaterial. Herein, it is demonstrated that atomic layer deposition can be used as a pliable technique for the application of oxide coatings to substrate-based Cu nanostructures where suitably protected structures become robust to oxid…

    Date Published:
    2020-07
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    Public
  • Author(s):
    Obaidullah Rahman, Ken Sauer
    Abstract:

    In this work, we perform direct material reconstruction from spectral CT data using a model based iterative reconstruction (MBIR) approach. Material concentrations are measured in volume fractions, whose total is constrained by a maximum of unity. A phantom containing a combination of 4 basis materials (water, iodine, gadolinium, calcium) was scanned using a photon-counting detector. Iodine and gadolinium were chosen because of their common use as contrast agents in CT imaging. Scan data was …

    Date Published:
    2020-08
    Record Visibility:
    Public