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  1. Article: Charge transfer controlled hydrogenation of graphene on an electronically modified Pt(111) surface

    Panahi, Mohammad / Solati, Navid / Kahraman, Abdullah / Balkan, Timuçin / Píš, Igor / Bondino, Federica / Kaya, Sarp

    Carbon. 2020 Dec., v. 170

    2020  

    Abstract: The interfaces of graphene and hydrogenated graphene with 3d atom embedded Pt(111) [Pt-3d-Pt(111), 3d: Fe, Co] substrates have comparatively been investigated utilizing X-ray photoelectron spectroscopy (XPS), near-edge X-ray absorption fine structure ... ...

    Abstract The interfaces of graphene and hydrogenated graphene with 3d atom embedded Pt(111) [Pt-3d-Pt(111), 3d: Fe, Co] substrates have comparatively been investigated utilizing X-ray photoelectron spectroscopy (XPS), near-edge X-ray absorption fine structure spectroscopy (NEXAFS), and temperature-programmed XPS (TPXPS) and desorption (TPD). 3d atoms in the subsurface layer of Pt(111) change the electronic properties of graphene via modifying its p-doping level. Hydrogenation makes graphene pinned to the Pt(111) and Pt-3d-Pt(111) substrates and induces surface segregation of 3d atoms from the subsurface layer into the interface of HGr and Pt-3d-Pt(111). Such a mechanism changes the desorption energetics of hydrogen significantly.
    Keywords X-ray absorption spectroscopy ; X-ray photoelectron spectroscopy ; desorption ; graphene ; hydrogen ; hydrogenation
    Language English
    Dates of publication 2020-12
    Size p. 636-645.
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ISSN 0008-6223
    DOI 10.1016/j.carbon.2020.08.037
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Under-cover stabilization and reactivity of a dense carbon monoxide layer on Pt(111).

    Píš, Igor / Magnano, Elena / Nappini, Silvia / Bondino, Federica

    Chemical science

    2018  Volume 10, Issue 6, Page(s) 1857–1865

    Abstract: The space between a metal surface and a two-dimensional cover can be regarded as a nanoreactor, where confined molecule adsorption and surface reactions may occur. In this work, we report CO intercalation and reactivity between a graphene-hexagonal boron ...

    Abstract The space between a metal surface and a two-dimensional cover can be regarded as a nanoreactor, where confined molecule adsorption and surface reactions may occur. In this work, we report CO intercalation and reactivity between a graphene-hexagonal boron nitride (h-BNG) heterostructure and Pt(111). By employing high resolution X-ray photoemission spectroscopy (XPS) we demonstrate the molecular intercalation of the full h-BNG overlayer and stabilization of a dense
    Language English
    Publishing date 2018-12-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/c8sc04461a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Trimethylamine Probes Isolated Silicon Dangling Bonds and Surface Hydroxyls of (H,OH)-Si(001)

    Ramírez, Lucía Pérez / Fornefeld, Niklas / Bournel, Fabrice / Kubsky, Stefan / Magnano, Elena / Bondino, Federica / Köhler, Ulrich / Carniato, Stéphane / Gallet, Jean-Jacques / Rochet, François

    Journal of physical chemistry. 2022 Jan. 27, v. 126, no. 5

    2022  

    Abstract: To better understand why amines catalyze the reactivity of SiOH with silanes, we examined the adsorption of trimethylamine under a low pressure (10–⁹–10–⁸ mbar) and a low temperature (105–160 K) on water-terminated (H,OH)-Si(001), which is both a model ... ...

    Abstract To better understand why amines catalyze the reactivity of SiOH with silanes, we examined the adsorption of trimethylamine under a low pressure (10–⁹–10–⁸ mbar) and a low temperature (105–160 K) on water-terminated (H,OH)-Si(001), which is both a model surface for adsorption studies and a promising starting substrate for atomic layer deposition. Trimethylamine bonding configurations were determined by combining real-time synchrotron radiation X-ray photoelectron spectroscopy (XPS) and high-resolution electron energy loss spectroscopy (HREELS) with density functional theory (DFT) calculations of core-level ionization energies and vibrational spectra. Both spectroscopies showed that the majority of species are trimethylamine molecules making acceptor H bonds with surface hydroxyls. Moreover, HREELS indicated that the hydrogen-bonding modes (single and double hydrogen acceptor bonds) depend on temperature and/or coverage, which may in turn affect the weakening of the O–H bond, and hence the catalytic effects of trimethylamine. XPS also clearly detected a minority species, trimethylamine, datively bonded to the isolated silicon dangling bonds (a few 1/100th of a monolayer). This species is prone to breaking, and a detailed analysis of the reaction products was made. The reactivity of the electrically active isolated silicon dangling bonds with the amine may impact the Fermi-level position in the gap.
    Keywords X-ray photoelectron spectroscopy ; adsorption ; density functional theory ; energy ; hydrogen ; hydrogen bonding ; ionization ; silanes ; silicon ; temperature ; trimethylamine
    Language English
    Dates of publication 2022-0127
    Size p. 2548-2560.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.1c09776
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Electronic properties of carbon nanotubes as detected by photoemission and inverse photoemission.

    Soncini, Cristian / Bondino, Federica / Magnano, Elena / Bhardwaj, Sunil / Kumar, Manvendra / Cepek, Cinzia / Pedio, Maddalena

    Nanotechnology

    2020  Volume 32, Issue 10, Page(s) 105703

    Abstract: The relation between morphology and energy level alignment in carbon nanotubes (CNT) is a crucial information for the optimization of applications in nanoelectronics, optics, mechanics and (bio)chemistry. Here we present a study of the relation between ... ...

    Abstract The relation between morphology and energy level alignment in carbon nanotubes (CNT) is a crucial information for the optimization of applications in nanoelectronics, optics, mechanics and (bio)chemistry. Here we present a study of the relation between the electronic properties and the morphology of single wall CNT (SWCNT), aligned multi wall CNT (MWCNT) and unaligned MWCNT. The CNT were synthesized via catalytic chemical vapor deposition in ultra-high vacuum conditions. Combined ultraviolet photoemission and inverse photoemission (IPES) spectra reveal a high sensitivity to the nanotube morphology. In the case of unaligned SWCNT the distinctive unoccupied Van Hove singularities (vHs) features are observed in the high resolution IPES spectra. Those features are assigned to semiconducting and metallic SWCNT states, according to calculated vHs DOS. The two MWCNT samples are similar in the diameter of the tube (about 15 nm) and present similar filled and empty electronic states, although the measured features in the aligned MWCNT are more defined. Noteworthy, interlayer states are also revealed. Their intensities are directly related to the MWCNT alignment. Focussing and geometrical effects associated to the MWCNT alignment are discussed to account the spectral differences.
    Language English
    Publishing date 2020-12-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 1362365-5
    ISSN 1361-6528 ; 0957-4484
    ISSN (online) 1361-6528
    ISSN 0957-4484
    DOI 10.1088/1361-6528/abce30
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: A ferromagnetic Eu-Pt surface compound grown below hexagonal boron nitride.

    Mohammed Idris Bakhit, Alaa / Ali, Khadiza / Makarova, Anna A / Píš, Igor / Bondino, Federica / Sant, Roberto / Dash, Saroj P / Castrillo-Bodero, Rodrigo / Hasegawa, Yuri / Ortega, J Enrique / Fernandez, Laura / Schiller, Frederik

    Nanoscale

    2023  Volume 15, Issue 27, Page(s) 11517–11528

    Abstract: One of the fundamental applications for monolayer-thick 2D materials is their use as protective layers of metal surfaces ... ...

    Abstract One of the fundamental applications for monolayer-thick 2D materials is their use as protective layers of metal surfaces and
    Language English
    Publishing date 2023-07-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d3nr00630a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Lithium-Induced Reorientation of Few-Layer MoS

    Sojková, Michaela / Píš, Igor / Hrdá, Jana / Vojteková, Tatiana / Pribusová Slušná, Lenka / Vegso, Karol / Siffalovic, Peter / Nadazdy, Peter / Dobročka, Edmund / Krbal, Miloš / Fons, Paul J / Munnik, Frans / Magnano, Elena / Hulman, Martin / Bondino, Federica

    Chemistry of materials : a publication of the American Chemical Society

    2023  Volume 35, Issue 16, Page(s) 6246–6257

    Abstract: Molybdenum disulfide ( ... ...

    Abstract Molybdenum disulfide (MoS
    Language English
    Publishing date 2023-08-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1500399-1
    ISSN 1520-5002 ; 0897-4756
    ISSN (online) 1520-5002
    ISSN 0897-4756
    DOI 10.1021/acs.chemmater.3c00669
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Physical Delithiation of Epitaxial LiCoO

    Salagre, Elena / Segovia, Pilar / González-Barrio, Miguel Ángel / Jugovac, Matteo / Moras, Paolo / Pis, Igor / Bondino, Federica / Pearson, Justin / Wang, Richmond Shiwei / Takeuchi, Ichiro / Fuller, Elliot J / Talin, Alec A / Mascaraque, Arantzazu / Michel, Enrique G

    ACS applied materials & interfaces

    2023  Volume 15, Issue 30, Page(s) 36224–36232

    Abstract: We report a novel delithiation process for epitaxial thin films of ... ...

    Abstract We report a novel delithiation process for epitaxial thin films of LiCoO
    Language English
    Publishing date 2023-07-19
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c06147
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Tuning the charge carrier mobility in few-layer PtSe

    Hrdá, Jana / Tašková, Valéria / Vojteková, Tatiana / Slušná, Lenka Pribusová / Dobročka, Edmund / Píš, Igor / Bondino, Federica / Hulman, Martin / Sojková, Michaela

    RSC advances

    2021  Volume 11, Issue 44, Page(s) 27292–27297

    Abstract: Recently, few-layer ... ...

    Abstract Recently, few-layer PtSe
    Language English
    Publishing date 2021-08-10
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d1ra04507e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Correction: Tuning the charge carrier mobility in few-layer PtSe

    Hrdá, Jana / Tašková, Valéria / Vojteková, Tatiana / Slušná, Lenka Pribusová / Dobročka, Edmund / Píš, Igor / Bondino, Federica / Hulman, Martin / Sojková, Michaela

    RSC advances

    2021  Volume 11, Issue 62, Page(s) 39245

    Abstract: This corrects the article DOI: 10.1039/D1RA04507E.]. ...

    Abstract [This corrects the article DOI: 10.1039/D1RA04507E.].
    Language English
    Publishing date 2021-12-08
    Publishing country England
    Document type Published Erratum
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d1ra90174e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Energy Level Alignment at the Cobalt Phosphate/Electrolyte Interface: Intrinsic Stability vs Interfacial Chemical Reactions in 5 V Lithium Ion Batteries

    Cherkashinin, Gennady / Eilhardt, Robert / Nappini, Silvia / Cococcioni, Matteo / Píš, Igor / dal Zilio, Simone / Bondino, Federica / Marzari, Nicola / Magnano, Elena / Alff, Lambert

    ACS applied materials & interfaces. 2021 Dec. 21, v. 14, no. 1

    2021  

    Abstract: The intrinsic stability of the 5 V LiCoPO₄–LiCo₂P₃O₁₀ thin-film (carbon-free) cathode material coated with MoO₃ thin layer is studied using a comprehensive synchrotron electron spectroscopy in situ approach combined with first-principle calculations. The ...

    Abstract The intrinsic stability of the 5 V LiCoPO₄–LiCo₂P₃O₁₀ thin-film (carbon-free) cathode material coated with MoO₃ thin layer is studied using a comprehensive synchrotron electron spectroscopy in situ approach combined with first-principle calculations. The atomic–molecular level study demonstrates fully reversible electronic properties of the cathode after the first electrochemical cycle. The polyanionic oxide is not involved in chemical reactions with the fluoroethylene-containing liquid electrolyte even when charged to 5.1 V vs Li⁺/Li. The high stability of the cathode is explained on the basis of the developed energy level model. In contrast, the chemical composition of the cathode–electrolyte interface evolves continuously by involving MoO₃ in the decomposition reaction with consequent leaching of oxide from the surface. The proposed mechanisms of chemical reactions are attributed to external electrolyte oxidation via charge transfer from the relevant electron level to the MoO₃ valence band state and internal electrolyte oxidation via proton transfer to the solvents. This study provides a deeper insight into the development of both a doping strategy to enhance the electronic conductivity of high-voltage cathode materials and an efficient surface coating against unfavorable interfacial chemical reactions.
    Keywords cathodes ; chemical composition ; cobalt ; electrochemistry ; electrolytes ; energy ; liquids ; lithium ; models ; oxidation ; phosphates ; spectroscopy
    Language English
    Dates of publication 2021-1221
    Size p. 543-556.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1944-8252
    DOI 10.1021/acsami.1c16296
    Database NAL-Catalogue (AGRICOLA)

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