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  1. Artikel ; 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  Band 61, Heft 9, Seite(n) 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
    Sprache Englisch
    Erscheinungsdatum 2022-02-22
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.1c03846
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; 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  Band 26, Heft 22

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

    Abstract A p-type Cu
    Sprache Englisch
    Erscheinungsdatum 2021-11-12
    Erscheinungsland Switzerland
    Dokumenttyp 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
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Buch ; 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.
    Schlagwörter Condensed Matter - Materials Science
    Thema/Rubrik (Code) 540
    Erscheinungsdatum 2024-01-03
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

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  4. Artikel ; 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  Band 28, Heft 33, Seite(n) 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
    Sprache Englisch
    Erscheinungsdatum 2022-04-21
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202200479
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: Could this be measles?

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

    Emergency medicine journal : EMJ

    2019  Band 36, Heft 5, Seite(n) 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-Begriff(e) Child ; Cough/etiology ; Fever/etiology ; Humans ; Male ; Measles/diagnosis ; Measles/physiopathology ; Measles Vaccine/therapeutic use ; Morbillivirus/pathogenicity
    Chemische Substanzen Measles Vaccine
    Sprache Englisch
    Erscheinungsdatum 2019-04-03
    Erscheinungsland England
    Dokumenttyp 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
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Verfügbar in ZB MED Köln/Königswinter

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  6. Artikel: 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  Band 7, Seite(n) 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.
    Sprache Englisch
    Erscheinungsdatum 2019-05-14
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article ; Review
    ZDB-ID 2711776-5
    ISSN 2296-2646
    ISSN 2296-2646
    DOI 10.3389/fchem.2019.00299
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; 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  Band 58, Heft 10, Seite(n) 6845–6857

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

    Abstract A family of solid solutions, Cu
    Sprache Englisch
    Erscheinungsdatum 2019-05-09
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.9b00304
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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