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  1. Article ; Online: Structure, Stability, and Photocatalytic Activity of a Layered Perovskite Niobate after Flux-Mediated Sn(II) Exchange.

    O'Donnell, Shaun / Smith, Avery / Carbone, Abigail / Maggard, Paul A

    Inorganic chemistry

    2022  Volume 61, Issue 9, Page(s) 4062–4070

    Abstract: A new strategy to incorporate the Sn(II) cation and its stereoactive lone pair into the structure of a photocatalytic oxide has been achieved by leveraging the asymmetric coordination environments within the (111)-oriented perovskite-type layers of ... ...

    Abstract A new strategy to incorporate the Sn(II) cation and its stereoactive lone pair into the structure of a photocatalytic oxide has been achieved by leveraging the asymmetric coordination environments within the (111)-oriented perovskite-type layers of Ba
    Language English
    Publishing date 2022-02-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.1c03846
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A Metastable p-Type Semiconductor as a Defect-Tolerant Photoelectrode.

    Sohag, Zahirul / O'Donnell, Shaun / Fuoco, Lindsay / Maggard, Paul A

    Molecules (Basel, Switzerland)

    2021  Volume 26, Issue 22

    Abstract: ... A p-type ... ...

    Abstract A p-type Cu
    Language English
    Publishing date 2021-11-12
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules26226830
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.MO 81: Show issues

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  3. Book ; Online: Bulk synthesis of Zn$_3$WN$_4$ via solid-state metathesis

    Rom, Christopher L. / O'Donnell, Shaun / Huang, Kayla / Klein, Ryan A. / Kramer, Morgan J. / Smaha, Rebecca W. / Zakutayev, Andriy

    2024  

    Abstract: Ternary nitrides are of growing technological importance, with applications as semiconductors, catalysts, and magnetic materials; however, new synthetic tools are needed to advance materials discovery efforts. Here, we show that Zn$_3$WN$_4$ can be ... ...

    Abstract Ternary nitrides are of growing technological importance, with applications as semiconductors, catalysts, and magnetic materials; however, new synthetic tools are needed to advance materials discovery efforts. Here, we show that Zn$_3$WN$_4$ can be synthesized via metathesis reactions between Li$_6$WN$_4$ and Zn$X_2$ ($X$ = Br, Cl, F). In situ synchrotron powder X-ray diffraction and differential scanning calorimetry show that the reaction onset is correlated with the Zn$X_2$ melting point and that product purity is inversely correlated with the reaction's exothermicity. High resolution synchrotron powder X-ray diffraction measurements show that this bulk synthesis produces a structure with substantial cation ordering, as opposed to the disordered structure initially discovered via thin film sputtering. Diffuse reflectance spectroscopy reveals that Zn$_3$WN$_4$ powders exhibit two optical absorption onsets at 2.5 eV and 4.0 eV, indicating wide-bandgap semiconducting behavior and suggesting a small amount of structural disorder. We hypothesize that this synthesis strategy is generalizable because many potential Li-$M$-N precursors (where $M$ is a metal) are available for synthesizing new ternary nitride materials. This work introduces a promising synthesis strategy that will accelerate the discovery of novel functional ternary nitrides and other currently inaccessible materials.
    Keywords Condensed Matter - Materials Science
    Subject code 540
    Publishing date 2024-01-03
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Renaissance of Topotactic Ion-Exchange for Functional Solids with Close Packed Structures.

    Gabilondo, Eric / O'Donnell, Shaun / Newell, Ryan / Broughton, Rachel / Mateus, Marcelo / Jones, Jacob L / Maggard, Paul A

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2022  Volume 28, Issue 33, Page(s) e202200479

    Abstract: Recently, many new, complex, functional oxides have been discovered with the surprising use of topotactic ion-exchange reactions on close-packed structures, such as found for wurtzite, rutile, perovskite, and other structure types. Despite a lack of ... ...

    Abstract Recently, many new, complex, functional oxides have been discovered with the surprising use of topotactic ion-exchange reactions on close-packed structures, such as found for wurtzite, rutile, perovskite, and other structure types. Despite a lack of apparent cation-diffusion pathways in these structure types, synthetic low-temperature transformations are possible with the interdiffusion and exchange of functional cations possessing ns
    Language English
    Publishing date 2022-04-21
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202200479
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  5. Article ; Online: Could this be measles?

    O'Donnell, Shaun / Davies, Ffion / Vardhan, Madhur / Nee, Patrick

    Emergency medicine journal : EMJ

    2019  Volume 36, Issue 5, Page(s) 310–314

    Abstract: Infection with the measles virus causes an unpleasant disease with many potentially serious complications. It is predominantly a childhood illness but can affect any age. Measles is extraordinarily contagious, but immunisation with measles containing ... ...

    Abstract Infection with the measles virus causes an unpleasant disease with many potentially serious complications. It is predominantly a childhood illness but can affect any age. Measles is extraordinarily contagious, but immunisation with measles containing vaccine provides comprehensive protection. An international programme of universal immunisation from the mid-1980s has been very effective; measles was declared eliminated in the USA nearly two decades ago and became a rarity in other countries with high rates of vaccine uptake. Until recently, this was a forgotten disease in high-income countries, but paediatricians, emergency and primary care physicians worldwide are now encountering measles with increased frequency. Attributed to international travel and pockets of vaccine hesitancy locally, new outbreaks of measles have been recorded in many regions thought to have been free of the disease. Because it was previously so uncommon, measles presents a diagnostic challenge and an unrecognised case may cause infection to spread among communities. The present article presents a case of confirmed measles infection and discusses the epidemiology, clinical features, investigation, management and prevention of measles.
    MeSH term(s) Child ; Cough/etiology ; Fever/etiology ; Humans ; Male ; Measles/diagnosis ; Measles/physiopathology ; Measles Vaccine/therapeutic use ; Morbillivirus/pathogenicity
    Chemical Substances Measles Vaccine
    Language English
    Publishing date 2019-04-03
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 2040124-3
    ISSN 1472-0213 ; 1472-0205
    ISSN (online) 1472-0213
    ISSN 1472-0205
    DOI 10.1136/emermed-2019-208490
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1941: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: Harnessing Plasmon-Induced Hot Carriers at the Interfaces With Ferroelectrics.

    Kumar, Vineet / O'Donnell, Shaun C / Sang, Daniel L / Maggard, Paul A / Wang, Gufeng

    Frontiers in chemistry

    2019  Volume 7, Page(s) 299

    Abstract: This article reviews the scientific understanding and progress of interfacing plasmonic particles with ferroelectrics in order to facilitate the absorption of low-energy photons and their conversion to chemical fuels. The fundamental principles of hot ... ...

    Abstract This article reviews the scientific understanding and progress of interfacing plasmonic particles with ferroelectrics in order to facilitate the absorption of low-energy photons and their conversion to chemical fuels. The fundamental principles of hot carrier generation and charge injection are described for semiconductors interfaced with metallic nanoparticles and immersed in aqueous solutions, forming a synergistic juncture between the growing fields of plasmonically-driven photochemistry and semiconductor photocatalysis. The underlying mechanistic advantages of a metal-ferroelectric vs. metal-nonferroelectric interface are presented with respect to achieving a more optimal and efficient control over the Schottky barrier height and charge separation. Notable recent examples of using ferroelectric-interfaced plasmonic particles have demonstrated their roles in yielding significantly enhanced photocurrents as well as in the photon-driven production of molecular hydrogen. Notably, plasmonically-driven photocatalysis has been shown to occur for photon wavelengths in the infrared range, which is at lower energies than typically possible for conventional semiconductor photocatalysts. Recent results thus demonstrate that integrated ferroelectric-plasmonic systems represent a potentially transformative concept for use in the field of solar energy conversion.
    Language English
    Publishing date 2019-05-14
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2711776-5
    ISSN 2296-2646
    ISSN 2296-2646
    DOI 10.3389/fchem.2019.00299
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Impact of Nb(V) Substitution on the Structure and Optical and Photoelectrochemical Properties of the Cu

    Zoellner, Brandon / O'Donnell, Shaun / Wu, Zongkai / Itanze, Dominique / Carbone, Abigail / Osterloh, Frank E / Geyer, Scott / Maggard, Paul A

    Inorganic chemistry

    2019  Volume 58, Issue 10, Page(s) 6845–6857

    Abstract: A family of solid solutions, ... ...

    Abstract A family of solid solutions, Cu
    Language English
    Publishing date 2019-05-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.9b00304
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