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  1. Article: Additive Manufacturing of Electrically Conductive Multi-Layered Nanocopper in an Air Environment.

    Pervan, David / Bastola, Anil / Worsley, Robyn / Wildman, Ricky / Hague, Richard / Lester, Edward / Tuck, Christopher

    Nanomaterials (Basel, Switzerland)

    2024  Volume 14, Issue 9

    Abstract: The additive manufacturing (AM) of functional copper (Cu) parts is a major goal for many industries, from aerospace to automotive to electronics, because Cu has a high thermal and electrical conductivity as well as being ~10× cheaper than silver. ... ...

    Abstract The additive manufacturing (AM) of functional copper (Cu) parts is a major goal for many industries, from aerospace to automotive to electronics, because Cu has a high thermal and electrical conductivity as well as being ~10× cheaper than silver. Previous studies on AM of Cu have concentrated mainly on high-energy manufacturing processes such as Laser Powder Bed Fusion, Electron Beam Melting, and Binder Jetting. These processes all require high-temperature heat treatment in an oxygen-free environment. This paper shows an AM route to multi-layered microparts from novel nanoparticle (NP) Cu feedstocks, performed in an air environment, employing a low-power (<10 W) laser sintering process. Cu NP ink was deposited using two mechanisms, inkjet printing, and bar coating, followed by low-power laser exposure to induce particle consolidation. Initial parts were manufactured to a height of approximately 100 µm, which was achieved by multi-layer printing of 15 (bar-coated) to 300 (inkjetted) layers. There was no evidence of oxidised copper in the sintered material, but they were found to be low-density, porous structures. Nonetheless, electrical resistivity of ~28 × 10
    Language English
    Publishing date 2024-04-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano14090753
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book: British propaganda and wars of Empire

    Kennedy, Greg / Tuck, Christopher

    influencing friend and foe 1900 - 2010

    2014  

    Author's details ed. by Greg Kennedy and Christopher Tuck
    Keywords Propaganda/History ; Great Britain
    Language English
    Size XII, 276 S.
    Publisher Ashgate
    Publishing place Farnham, Surrey u.a.
    Document type Book
    Note Literaturverz. S. [243] - 259 und Index
    ISBN 9781409451730 ; 9781409451747 ; 9781472406743 ; 1409451739 ; 1409451747 ; 1472406745
    Database Former special subject collection: coastal and deep sea fishing

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  3. Book ; Online: Understanding Land Warfare

    Tuck, Christopher

    2014  

    Abstract: Understanding Land Warfare provides a thorough grounding in the vocabulary, concepts, issues and debates associated with modern land warfare.The book is a thematic, debate-driven analysis of what makes land warfare unique; how it interacts with the other ...

    Abstract Understanding Land Warfare provides a thorough grounding in the vocabulary, concepts, issues and debates associated with modern land warfare.The book is a thematic, debate-driven analysis of what makes land warfare unique; how it interacts with the other environments; the key concepts that shape how it is executed; the trade-offs associated with its prosecution; and the controversies that continue to surround its focus and development. Understanding Land Warfare contains several key themes:the difficulty of conducting land warfarethe interplay between change and continuitythe growing importanc
    Language English
    Size Online-Ressource (290 p)
    Publisher Taylor and Francis
    Publishing place Hoboken
    Document type Book ; Online
    Note Description based upon print version of record
    ISBN 9780415507530 ; 0415507537
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  4. Article ; Online: Additively Manufactured 3D Micro-bioelectrodes for Enhanced Bioelectrocatalytic Operation

    Jodeiri, Keyvan / Foerster, Aleksandra / Trindade, Gustavo F. / Im, Jisun / Carballares, Diego / Fernández-Lafuente, Roberto / Pita, Marcos / De Lacey, Antonio L. / Parmenter, Christopher D / Tuck, Christopher

    ACS Applied Materials & Interfaces. 2023 Mar. 10, v. 15, no. 11 p.14914-14924

    2023  

    Abstract: The drive toward miniaturization of enzyme-based bioelectronics established a need for three-dimensional (3D) microstructured electrodes, which are difficult to implement using conventional manufacturing processes. Additive manufacturing coupled with ... ...

    Abstract The drive toward miniaturization of enzyme-based bioelectronics established a need for three-dimensional (3D) microstructured electrodes, which are difficult to implement using conventional manufacturing processes. Additive manufacturing coupled with electroless metal plating enables the production of 3D conductive microarchitectures with high surface area for potential applications in such devices. However, interfacial delamination between the metal layer and the polymer structure is a major reliability concern, which leads to device performance degradation and eventually device failure. This work demonstrates a method to produce a highly conductive and robust metal layer on a 3D printed polymer microstructure with strong adhesion by introducing an interfacial adhesion layer. Prior to 3D printing, multifunctional acrylate monomers with alkoxysilane (−Si-(OCH₃)₃) were synthesized via the thiol-Michael addition reaction between pentaerythritol tetraacrylate (PETA) and 3-mercaptopropyltrimethoxysilane (MPTMS) with a 1:1 stoichiometric ratio. Alkoxysilane functionality remains intact during photopolymerization in a projection micro-stereolithography (PμSLA) system and is utilized for the sol-gel reaction with MPTMS during postfunctionalization of the 3D printed microstructure to build an interfacial adhesion layer. This leads to the implementation of abundant thiol functional groups on the surface of the 3D printed microstructure, which can act as a strong binding site for gold during electroless plating to improve interfacial adhesion. The 3D conductive microelectrode prepared by this technique exhibited excellent conductivity of 2.2 × 10⁷ S/m (53% of bulk gold) with strong adhesion between a gold layer and a polymer structure even after harsh sonication and an adhesion tape test. As a proof-of-concept, we examined the 3D gold diamond lattice microelectrode modified with glucose oxidase as a bioanode for a single enzymatic biofuel cell. The lattice-structured enzymatic electrode with high catalytic surface area was able to generate a current density of 2.5 μA/cm² at 0.35 V, which is an about 10 times increase in current output compared to a cube-shaped microelectrode.
    Keywords adhesion ; bioanodes ; delamination ; glucose oxidase ; gold ; microbial fuel cells ; microstructure ; polymers ; sonication ; stoichiometry ; surface area ; thiols ; three-dimensional printing ; additive manufacturing ; microelectrodes ; surface functionalization ; electroless metal plating ; enzymatic fuel cells
    Language English
    Dates of publication 2023-0310
    Size p. 14914-14924.
    Publishing place American Chemical Society
    Document type Article ; Online
    ISSN 1944-8252
    DOI 10.1021/acsami.2c20262
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Quantum Nature of Charge Transport in Inkjet-Printed Graphene Revealed in High Magnetic Fields up to 60T.

    Cottam, Nathan D / Wang, Feiran / Austin, Jonathan S / Tuck, Christopher J / Hague, Richard / Fromhold, Mark / Escoffier, Walter / Goiran, Michel / Pierre, Mathieu / Makarovsky, Oleg / Turyanska, Lyudmila

    Small (Weinheim an der Bergstrasse, Germany)

    2024  , Page(s) e2311416

    Abstract: Inkjet-printing of graphene, iGr, provides an alternative route for the fabrication of highly conductive and flexible graphene films for use in devices. However, the contribution of quantum phenomena associated with 2D single layer graphene, SLG, to the ... ...

    Abstract Inkjet-printing of graphene, iGr, provides an alternative route for the fabrication of highly conductive and flexible graphene films for use in devices. However, the contribution of quantum phenomena associated with 2D single layer graphene, SLG, to the charge transport in iGr is yet to be explored. Here, the first magneto-transport study of iGr in high magnetic fields up to 60 T is presented. The observed quantum phenomena, such as weak localization and negative magnetoresistance, are strongly affected by the thickness of the iGr film and can be explained by a combination of intra- and inter-flake classical and quantum charge transport. The quantum nature of carrier transport in iGr is revealed using temperature, electric field, and magnetic field dependences of the iGr conductivity. These results are relevant for the exploitation of inkjet deposition of graphene, which is of particular interest for additive manufacturing and 3D printing of flexible and wearable electronics. It is shown that printed nanostructures enable ensemble averaging of quantum interference phenomena within a single device, thereby facilitating comparison between experiment and underlying statistical models of electron transport.
    Language English
    Publishing date 2024-02-27
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2168935-0
    ISSN 1613-6829 ; 1613-6810
    ISSN (online) 1613-6829
    ISSN 1613-6810
    DOI 10.1002/smll.202311416
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

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  6. Article ; Online: Current recommendations/practices for anonymising data from clinical trials in order to make it available for sharing: A scoping review.

    Rodriguez, Aryelly / Tuck, Christopher / Dozier, Marshall F / Lewis, Stephanie C / Eldridge, Sandra / Jackson, Tracy / Murray, Alastair / Weir, Christopher J

    Clinical trials (London, England)

    2022  Volume 19, Issue 4, Page(s) 452–463

    Abstract: Background/aims: There are increasing pressures for anonymised datasets from clinical trials to be shared across the scientific community, and differing recommendations exist on how to perform anonymisation prior to sharing. We aimed to systematically ... ...

    Abstract Background/aims: There are increasing pressures for anonymised datasets from clinical trials to be shared across the scientific community, and differing recommendations exist on how to perform anonymisation prior to sharing. We aimed to systematically identify, describe and synthesise existing recommendations for anonymising clinical trial datasets to prepare for data sharing.
    Methods: We systematically searched MEDLINE
    Results: Fifty-nine articles (from 43 studies) were eligible for inclusion. Three distinct themes are emerging: anonymisation, de-identification and pseudonymisation. The most commonly used anonymisation techniques are: removal of direct patient identifiers; and careful evaluation and modification of indirect identifiers to minimise the risk of identification. Anonymised datasets joined with controlled access was the preferred method for data sharing.
    Conclusions: There is no single standardised set of recommendations on how to anonymise clinical trial datasets for sharing. However, this systematic review shows a developing consensus on techniques used to achieve anonymisation. Researchers in clinical trials still consider that anonymisation techniques by themselves are insufficient to protect patient privacy, and they need to be paired with controlled access.
    MeSH term(s) Confidentiality ; Data Anonymization ; Humans ; Information Dissemination/methods ; Research Personnel
    Language English
    Publishing date 2022-06-22
    Publishing country England
    Document type Journal Article ; Systematic Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2138796-5
    ISSN 1740-7753 ; 1740-7745
    ISSN (online) 1740-7753
    ISSN 1740-7745
    DOI 10.1177/17407745221087469
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 5831: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  7. Article: The Effects of Feature Sizes in Selectively Laser Melted Ti-6Al-4V Parts on the Validity of Optimised Process Parameters.

    Phutela, Chinmay / Aboulkhair, Nesma T / Tuck, Christopher J / Ashcroft, Ian

    Materials (Basel, Switzerland)

    2019  Volume 13, Issue 1

    Abstract: Ti-6Al-4V is a popular alloy due to its high strength-to-weight ratio and excellent corrosion resistance. Many applications of additively manufactured Ti-6Al-4V using selective laser melting (SLM) have reached technology readiness. However, issues linked ...

    Abstract Ti-6Al-4V is a popular alloy due to its high strength-to-weight ratio and excellent corrosion resistance. Many applications of additively manufactured Ti-6Al-4V using selective laser melting (SLM) have reached technology readiness. However, issues linked with metallurgical differences in parts manufactured by conventional processes and SLM persist. Very few studies have focused on relating the process parameters to the macroscopic and microscopic properties of parts with different size features. Therefore, the aim of this study was to investigate the effect of the size of features on the density, hardness, microstructural evolution, and mechanical properties of Ti-6Al-4V parts fabricated using a fixed set of parameters. It was found that there is an acceptable range of sizes that can be produced using a fixed set of parameters. Beyond a specific window, the relative density decreased. Upon decreasing the size of a cuboid from (5 × 5 × 5 mm) to (1 × 1 × 5 mm), porosity increased from 0.3% to 4.8%. Within a suitable size range, the microstructure was not significantly affected by size; however, a major change was observed outside the acceptable size window. The size of features played a significant role in the variation of mechanical properties. Under tensile loading, decreasing the gauge size, the ultimate and yield strengths deteriorated. This investigation, therefore, presents an understanding of the correlation between the feature size and process parameters in terms of the microscopic and macroscopic properties of Ti-6Al-4V parts manufactured using SLM. This study also highlights the fact that any set of optimized process parameters will only be valid within a specific size window.
    Language English
    Publishing date 2019-12-26
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma13010117
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: A facile one step route that introduces functionality to polymer powders for laser sintering.

    Krumins, Eduards / Crawford, Liam A / Rogers, David M / Machado, Fabricio / Taresco, Vincenzo / East, Mark / Irving, Samuel H / Fowler, Harriet R / Jiang, Long / Starr, Nichola / Parmenter, Christopher D J / Kortsen, Kristoffer / Cuzzucoli Crucitti, Valentina / Avery, Simon V / Tuck, Christopher J / Howdle, Steven M

    Nature communications

    2024  Volume 15, Issue 1, Page(s) 3137

    Abstract: Laser Sintering (LS) is a type of Additive Manufacturing (AM) exploiting laser processing of polymeric particles to produce 3D objects. Because of its ease of processability and thermo-physical properties, polyamide-12 (PA-12) represents ~95% of the ... ...

    Abstract Laser Sintering (LS) is a type of Additive Manufacturing (AM) exploiting laser processing of polymeric particles to produce 3D objects. Because of its ease of processability and thermo-physical properties, polyamide-12 (PA-12) represents ~95% of the polymeric materials used in LS. This constrains the functionality of the items produced, including limited available colours. Moreover, PA-12 objects tend to biofoul in wet environments. Therefore, a key challenge is to develop an inexpensive route to introduce desirable functionality to PA-12. We report a facile, clean, and scalable approach to modification of PA-12, exploiting supercritical carbon dioxide (scCO
    Language English
    Publishing date 2024-04-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-47376-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Additively Manufactured 3D Micro-bioelectrodes for Enhanced Bioelectrocatalytic Operation.

    Jodeiri, Keyvan / Foerster, Aleksandra / Trindade, Gustavo F / Im, Jisun / Carballares, Diego / Fernández-Lafuente, Roberto / Pita, Marcos / De Lacey, Antonio L / Parmenter, Christopher D / Tuck, Christopher

    ACS applied materials & interfaces

    2023  

    Abstract: The drive toward miniaturization of enzyme-based bioelectronics established a need for three-dimensional (3D) microstructured electrodes, which are difficult to implement using conventional manufacturing processes. Additive manufacturing coupled with ... ...

    Abstract The drive toward miniaturization of enzyme-based bioelectronics established a need for three-dimensional (3D) microstructured electrodes, which are difficult to implement using conventional manufacturing processes. Additive manufacturing coupled with electroless metal plating enables the production of 3D conductive microarchitectures with high surface area for potential applications in such devices. However, interfacial delamination between the metal layer and the polymer structure is a major reliability concern, which leads to device performance degradation and eventually device failure. This work demonstrates a method to produce a highly conductive and robust metal layer on a 3D printed polymer microstructure with strong adhesion by introducing an interfacial adhesion layer. Prior to 3D printing, multifunctional acrylate monomers with alkoxysilane (-Si-(OCH
    Language English
    Publishing date 2023-03-10
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.2c20262
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Book ; Online: British Propaganda and Wars of Empire

    Kennedy, Greg / Tuck, Christopher

    Influencing Friend and Foe 1900-2010

    2014  

    Abstract: In order to provide a better understanding of the shifting nature of influence, this volume looks at how the British government employed various forms of persuasion to achieve its goals across the twentieth century. The collection provides a range of ... ...

    Abstract In order to provide a better understanding of the shifting nature of influence, this volume looks at how the British government employed various forms of persuasion to achieve its goals across the twentieth century. The collection provides a range of case studies to assess how effectively - or ineffectively - influence was brought to bear on an array of non-western societies. This volume will be of interest not only to historians, but to anyone interested in the operation of influence as a foreign policy tool
    Language English
    Size Online-Ressource (289 p)
    Publisher Ashgate Publishing Ltd
    Publishing place Farnham
    Document type Book ; Online
    Note Description based upon print version of record
    ISBN 9781409451730 ; 1409451739
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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