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  1. Book ; Online: Platinum-Decorated Graphene

    Ferbel, Letizia / Veronesi, Stefano / Vlamidis, Ylea / Rossi, Antonio / Sabattini, Leonardo / Coletti, Camilla / Heun, Stefan

    Experimental Insight into Growth Mechanisms and Hydrogen Adsorption Properties

    2023  

    Abstract: The potential of graphene for hydrogen storage, coupled with the established role of Platinum as a catalyst for the hydrogen evolution reaction and the spillover effect, makes Pt-functionalized graphene a promising candidate for near-ambient hydrogen ... ...

    Abstract The potential of graphene for hydrogen storage, coupled with the established role of Platinum as a catalyst for the hydrogen evolution reaction and the spillover effect, makes Pt-functionalized graphene a promising candidate for near-ambient hydrogen storage. This paper focuses on examining the process of Pt cluster formation on epitaxial graphene and assesses the suitability of the system as hydrogen storage material. Scanning tunneling microscopy unveils two primary pathways for Pt cluster growth. In the initial phase, up to ~1 ML of Pt coverage, Pt tends to randomly disperse and cover the graphene surface, while the cluster height remains essentially unchanged. Beyond a coverage of 3 ML, the nucleation of new layers on existing clusters becomes predominant. Then, the clusters mainly grow in height. Thermal desorption spectroscopy on hydrogenated Pt-decorated graphene reveals the presence of multiple hydrogen adsorption mechanisms, manifested as two Gaussian peaks superimposed on a linearly increasing background. We attribute the first peak at 150{\deg}C to hydrogen physisorbed on the surface of Pt clusters. The second peak at 430{\deg}C is attributed to chemisorption of hydrogen on the surface of the clusters, while the linearly increasing background is assigned to hydrogen bonded in the bulk of the Pt clusters. These measurements demonstrate the ability of Pt-functionalized graphene to store molecular hydrogen at temperatures that are high enough for stable hydrogen binding at room temperature.
    Keywords Condensed Matter - Materials Science
    Subject code 540
    Publishing date 2023-09-27
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Three-dimensional graphene on a nano-porous 4H-silicon carbide backbone: a novel material for food sensing applications.

    Veronesi, Stefano / Vlamidis, Ylea / Ferbel, Letizia / Marinelli, Carmela / Sanmartin, Chiara / Taglieri, Isabella / Pfusterschmied, Georg / Leitgeb, Markus / Schmid, Ulrich / Mencarelli, Fabio / Heun, Stefan

    Journal of the science of food and agriculture

    2023  

    Abstract: Background: Sensors that are sensitive to volatile organic compounds, and thus able to monitor the conservation state of food, are precious because they work non-destructively and allow avoiding direct contact with the food, ensuring hygienic conditions. ...

    Abstract Background: Sensors that are sensitive to volatile organic compounds, and thus able to monitor the conservation state of food, are precious because they work non-destructively and allow avoiding direct contact with the food, ensuring hygienic conditions. In particular, the monitoring of rancidity would solve a widespread issue in food storage.
    Results: The sensor discussed here is produced utilizing a novel three-dimensional arrangement of graphene, which is grown on a crystalline silicon carbide wafer previously porousified by chemical etching. This approach allows a very high surface-to-volume ratio. Furthermore, the structure of the sensor surface features a large number of edges, dangling bounds, and active sites, which make the sensor, on a chemically robust skeleton, chemically active, particularly to hydrogenated molecules. The interaction of the sensor with such compounds is read out by measuring the sensor resistance in a four-wire configuration. The sensor performance has been assessed on three hazelnut samples: sound, spoiled, and stink bug hazelnuts. A resistance variation of about ∆R = 0.13 ± 0.02 Ω between sound and damaged hazelnuts has been detected.
    Conclusions: Our measurements confirm the ability of the sensor to discriminate between sound and damaged hazelnuts. The sensor signal is stable for days, providing the possibility to use this sensor for the monitoring of the storage state of fats and foods in general. © 2023 Society of Chemical Industry.
    Language English
    Publishing date 2023-11-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 184116-6
    ISSN 1097-0010 ; 0022-5142
    ISSN (online) 1097-0010
    ISSN 0022-5142
    DOI 10.1002/jsfa.13118
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    In stock of ZB MED Cologne/Königswinter

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    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  3. Article ; Online: In silico investigation of the interaction between the voltage-gated potassium channel Kv4.3 and its auxiliary protein KChIP1.

    Catte, Andrea / Ferbel, Letizia / Bhattacharjee, Nicholus / Jan Akhunzada, Muhammad / D'Agostino, Tommaso / Brancato, Giuseppe

    Physical chemistry chemical physics : PCCP

    2019  Volume 21, Issue 45, Page(s) 25290–25301

    Abstract: The voltage-gated potassium channel Kv4.3 plays a vital role in shaping the timing, frequency, and backpropagation of electrical signals in the brain and heart by generating fast transient currents at subthreshold membrane potentials in repetitive firing ...

    Abstract The voltage-gated potassium channel Kv4.3 plays a vital role in shaping the timing, frequency, and backpropagation of electrical signals in the brain and heart by generating fast transient currents at subthreshold membrane potentials in repetitive firing neurons. To achieve its physiological function, Kv4.3 is assisted by auxiliary β-subunits that become integral parts of the native A-type potassium channels, among which there are the Kv channel-interacting proteins (KChIPs). KChIPs are a family of cytosolic proteins that, when coexpressed with Kv4, lead to higher current density, modulation of channel inactivation and faster recovery from inactivation, while the loss of KChIP function may lead to severe pathological states. Recently, the structural basis of the KChIP1-Kv4.3 interaction was reported by using two similar X-ray crystallographic structures, which supported a crucial role for KChIP1 in enhancing the stability of the Kv4.3 tetrameric assembly, thus helping the trafficking of the channel to the plasma membrane. Here, we investigate through fully atomistic simulations the structure and stability of the human Kv4.3 tetramerization (T1) domain in complex with KChIP1 upon specific mutations located in the first and second interfaces of the complex, as compared to the wild-type (WT). Our results nicely complement the available structural and biophysical information collected so far on these complex variants. In particular, the degree of structural deviations and energetic instability, from small to substantial, observed in these variants with respect to the WT model seems to parallel well the level of channel dysfunction known from electrophysiology data. Our simulations provide an octameric structure of the WT KChIP1-Kv4.3 assembly very similar to the known crystal structures, and, at the same time, highlight the importance of a previously overlooked site of interaction between KChIP1 and the Kv4.3 T1 domain.
    MeSH term(s) Computer Simulation ; Crystallography, X-Ray ; Humans ; Kv Channel-Interacting Proteins/chemistry ; Kv Channel-Interacting Proteins/genetics ; Models, Molecular ; Mutation ; Shal Potassium Channels/chemistry ; Shal Potassium Channels/genetics
    Chemical Substances KCNIP1 protein, human ; Kv Channel-Interacting Proteins ; Shal Potassium Channels
    Language English
    Publishing date 2019-11-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/c9cp04082j
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  4. Book ; Online: Three-dimensional graphene on a nano-porous 4H-SiC backbone

    Veronesi, Stefano / Vlamidis, Ylea / Ferbel, Letizia / Marinelli, Carmela / Sanmartin, Chiara / Taglieri, Isabella / Pfusterschmied, Georg / Leitgeb, Markus / Schmid, Ulrich / Mencarelli, Fabio / Heun, Stefan

    a novel material for food sensing applications

    2023  

    Abstract: Sensors which are sensitive to volatile organic compounds and thus able to monitor the conservation state of food, are precious because they work non-destructively and allow to avoid direct contact with the food, ensuring hygienic conditions. In ... ...

    Abstract Sensors which are sensitive to volatile organic compounds and thus able to monitor the conservation state of food, are precious because they work non-destructively and allow to avoid direct contact with the food, ensuring hygienic conditions. In particular, the monitoring of rancidity would solve a widespread issue in food storage. The sensor discussed here is produced utilizing a novel three-dimensional arrangement of graphene, which is grown on a crystalline silicon carbide (SiC) wafer previously porousified by chemical etching. This approach allows a very high surface-to.volume ratio. Furthermore, the structure of the sensor surface features a large amount of edges, dangling bounds, and active sites, which make the sensor, on a chemically robust skeleton, chemically active, particularly to hydrogenated molecules. The interaction of the sensor with such compounds is read out by measuring the sensor resistance in a four wire configuration. The sensor performance has been assessed on three hazelnut samples: sound hazelnuts, spoiled hazelnuts, and stink bug hazelnuts. A resistance variation of about DeltaR = 0.13 (0.02) Ohm between sound and damaged hazelnuts has been detected. Our measurements confirm the ability of the sensor to discriminate between sound and damaged hazelnuts. The sensor signal is stable for days, providing the possibility to use this sensor for the monitoring of the storage state of fats and foods in general.

    Comment: 11 pages, 6 figures 1 table
    Keywords Physics - Applied Physics ; Condensed Matter - Materials Science
    Subject code 620
    Publishing date 2023-09-23
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Book ; Conference proceedings: Techniques and concepts of high energy physics X

    Ferbel, Thomas

    [proceedings of a NATO Advanced Study Institute on Techniques and Concepts of High Energy Physics, St. Croix, US Virgin Islands, June 18 - 29, 1998]

    (NATO science series : Series C, Mathematical and physical sciences ; v. 534)

    1999  

    Institution Advanced Study Institute on Techniques and Concepts of High Energy Physics
    Event/congress NATO Advanced Study Institute on Techniques and Concepts of High-Energy Physics (10, 1998.06.18-29, SaintCroixVirginIslands)
    Author's details ed. by T. Ferbel
    Series title NATO science series : Series C, Mathematical and physical sciences ; v. 534
    Language English
    Size XI, 628 S, Ill., graph. Darst
    Publisher Kluwer Acad. Publ
    Publishing place Dordrecht u.a.
    Document type Book ; Conference proceedings
    Note Literaturangaben
    ISBN 0792357299 ; 0792357302 ; 9780792357292 ; 9780792357308
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  6. Book ; Conference proceedings: Techniques and concepts of high-energy physics IX

    Ferbel, Thomas

    [proceedings of a NATO Advanced Study Institute on Techniques and Concepts of High-Energy Physics, held July 11 - 22, 1996, in St. Croix, U.S. Virgin Islands]

    (NATO ASI series : Series B, Physics ; 365)

    1997  

    Institution Advanced Study Institute on Techniques and Concepts of High Energy Physics
    Event/congress NATO Advanced Study Institute on Techniques and Concepts of High-Energy Physics (9, 1996.07.11-22, SaintCroixVirginIslands)
    Author's details ed. by Thomas Ferbel
    Series title NATO ASI series : Series B, Physics ; 365
    Language English
    Size IX, 539 S, graph. Darst
    Publisher Plenum Press
    Publishing place New York u.a.
    Document type Book ; Conference proceedings
    ISBN 0306457091 ; 9780306457098
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  7. Book ; Conference proceedings: Techniques and concepts of high-energy physics VIII

    Ferbel, Thomas

    [proceedings of a NATO Advanced Study Institute on Techniques and Concepts of High-Energy Physics, held June 16 - 27, 1994, in St. Croix, US Virgin Islands]

    (NATO ASI series : Series B, Physics ; 351)

    1995  

    Institution Advanced Study Institute on Techniques and Concepts of High Energy Physics
    Event/congress NATO Advanced Study Institute on Techniques and Concepts of High-Energy Physics (8, 1994.07.16-27, St.CroixVirginIslands)
    Author's details ed. by Thomas Ferbel
    Series title NATO ASI series : Series B, Physics ; 351
    Language English
    Size IX, 220 S, ill
    Publisher Plenum Press
    Publishing place New York u.a.
    Document type Book ; Conference proceedings
    Note Includes bibliographical references and index
    ISBN 0306451824 ; 9780306451829
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  8. Book ; Thesis: The politics of Taino Indian heritage in the post-quincentennial Dominican Republic

    Ferbel, Peter Jordan

    when a canoe means more than a water trough

    1995  

    Title variant Dissertation
    Author's details by Peter Jordan Ferbel
    Language English
    Size 3 Mikrofiches, Abb., Kt., 1 Tab
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Minn., Univ., Diss--Minneapolis, 1995
    Note 3 Mikrofiches : 24x ; Mikrofiche-Ausg.: Ann Arbor, Mich. : Univ. Microfilms Internat., 1996
    Database Former special subject collection: coastal and deep sea fishing

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  9. Book ; Conference proceedings: Techniques and concepts of high-energy physics VII

    Ferbel, Thomas

    (NATO ASI series : Series B, Physics ; 322)

    1994  

    Institution Advanced Study Institute on Techniques and Concepts of High Energy Physics
    Event/congress NATO Advanced Study Institute on Techniques and Concepts of High-Energy Physics (7, 1992.07.15-26, St.Croix)
    Author's details edited by Thomas Ferbel
    Series title NATO ASI series : Series B, Physics ; 322
    Language English
    Size x, 266 p, ill, 27 cm
    Publisher Plenum Press
    Publishing place New York
    Document type Book ; Conference proceedings
    Note Published in cooperation with NATO Scientific Affairs Division
    ISBN 030644674X ; 9780306446740
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  10. Book ; Conference proceedings: Techniques and concepts of high-energy physics VI

    Ferbel, Thomas

    proceedings of the Sixth NATO Advanced Study Institute on Techniques and Concepts of High-Energy Physics, held June 14 - 25, 1990, in St. Croix, US Virgin Islands

    (NATO ASI series. Series B: Physics ; vol. 275)

    1991  

    Institution Advanced Study Institute on Techniques and Concepts of High Energy Physics
    Event/congress NATO Advanced Study Institute on Techniques and Concepts of High-Energy Physics (6, 1990.06.14-25, St.CroixV.I.)
    Author's details ed. by Thomas Ferbel
    Series title NATO ASI series. Series B: Physics ; vol. 275
    Language English
    Size IX, 438 S, graph. Darst
    Publisher Plenum Press
    Publishing place New York
    Document type Book ; Conference proceedings
    ISBN 0306440431 ; 9780306440434
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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