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  1. Article ; Online: Amplification of chirality in surface-confined supramolecular bilayers

    Hai Cao / Steven De Feyter

    Nature Communications, Vol 9, Iss 1, Pp 1-

    2018  Volume 9

    Abstract: One of the most dramatic effects of supramolecular assembly is the generation of homochirality in near-racemic systems. Here the authors rationalize the chiral amplification mechanism with a combined scanning tunneling microscopy and modelling study of ... ...

    Abstract One of the most dramatic effects of supramolecular assembly is the generation of homochirality in near-racemic systems. Here the authors rationalize the chiral amplification mechanism with a combined scanning tunneling microscopy and modelling study of surface-grown enantiomerically unbalanced supramolecular bilayers.
    Keywords Science ; Q
    Language English
    Publishing date 2018-08-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Amplification of chirality in surface-confined supramolecular bilayers

    Hai Cao / Steven De Feyter

    Nature Communications, Vol 9, Iss 1, Pp 1-

    2018  Volume 9

    Abstract: One of the most dramatic effects of supramolecular assembly is the generation of homochirality in near-racemic systems. Here the authors rationalize the chiral amplification mechanism with a combined scanning tunneling microscopy and modelling study of ... ...

    Abstract One of the most dramatic effects of supramolecular assembly is the generation of homochirality in near-racemic systems. Here the authors rationalize the chiral amplification mechanism with a combined scanning tunneling microscopy and modelling study of surface-grown enantiomerically unbalanced supramolecular bilayers.
    Keywords Science ; Q
    Language English
    Publishing date 2018-08-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Growth of a self-assembled monolayer decoupled from the substrate

    Robby Reynaerts / Kunal S. Mali / Steven De Feyter

    Beilstein Journal of Nanotechnology, Vol 11, Iss 1, Pp 1291-

    nucleation on-command using buffer layers

    2020  Volume 1302

    Abstract: Structural polymorphism is ubiquitous in physisorbed self-assembled monolayers formed at the solution–solid interface. One of the ways to influence network formation at this interface is to physically decouple the self-assembled monolayer from the ... ...

    Abstract Structural polymorphism is ubiquitous in physisorbed self-assembled monolayers formed at the solution–solid interface. One of the ways to influence network formation at this interface is to physically decouple the self-assembled monolayer from the underlying substrate thereby removing the influence of the substrate lattice, if any. Here we show a systematic exploration of self-assembly of a typical building block, namely 4-tetradecyloxybenzoic acid at the 1-phenyloctane–graphite interface in the presence and in the absence of a buffer layer formed by a long chain alkane, namely n-pentacontane. Using scanning tunneling microscopy (STM), three different structural polymorphs were identified for 4-tetradecyloxybenzoic acid at the 1-phenyloctane–graphite interface. Surprisingly, the same three structures were formed on top of the buffer layer, albeit at different concentrations. Systematic variation of experimental parameters did not lead to any new network in the presence of the buffer layer. We discovered that the self-assembly on top of the buffer layer allows better control over the nanoscale manipulation of the self-assembled networks. Using the influence of the STM tip, we could initiate the nucleation of small isolated domains of the benzoic acid on-command in a reproducible fashion. Such controlled nucleation experiments hold promise for studying fundamental processes inherent to the assembly process on surfaces.
    Keywords benzoic acid ; nucleation ; self-assembly ; solution–solid interface ; substrate effect ; Technology ; T ; Chemical technology ; TP1-1185 ; Science ; Q ; Physics ; QC1-999
    Subject code 620
    Language English
    Publishing date 2020-09-01T00:00:00Z
    Publisher Beilstein-Institut
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Spectroscopic Characterization of Thiacarbocyanine Dye Molecules Adsorbed on Hexagonal Boron Nitride

    Anne-Charlotte Nellissen / Eduard Fron / Jonathan B. F. Vandenwijngaerden / Steven De Feyter / Stijn F. L. Mertens / Mark Van der Auweraer

    ACS Omega, Vol 8, Iss 39, Pp 35638-

    a Time-Resolved Study

    2023  Volume 35652

    Keywords Chemistry ; QD1-999
    Language English
    Publishing date 2023-09-01T00:00:00Z
    Publisher American Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Grafting Ink for Direct Writing

    Yuanzhi Xia / Li Sun / Samuel Eyley / Brent Daelemans / Wim Thielemans / Johannes Seibel / Steven De Feyter

    Advanced Science, Vol 9, Iss 19, Pp n/a-n/a (2022)

    Solvation Activated Covalent Functionalization of Graphene

    2022  

    Abstract: Abstract Covalent functionalization of graphene (CFG) has shown attractive advantages in tuning the electronic, mechanical, optical, and thermal properties of graphene. However, facile, large‐scale, controllable, and highly efficient CFG remains ... ...

    Abstract Abstract Covalent functionalization of graphene (CFG) has shown attractive advantages in tuning the electronic, mechanical, optical, and thermal properties of graphene. However, facile, large‐scale, controllable, and highly efficient CFG remains challenging and often involves highly reactive and volatile compounds, requiring complex control of the reaction conditions. Here, a diazonium‐based grafting ink consisting of only two components, i.e., an aryl diazonium salt and the solvent dimethyl sulfoxide (DMSO) is presented. The efficient functionalization is attributed to the combination of the solvation of the diazonium cations by DMSO and n‐doping of graphene by DMSO, thereby promoting electron transfer (ET) from graphene to the diazonium cations, resulting in the generation of aryl radicals which subsequently react with the graphene. The grafting density of CFG is controlled by the reaction time and very high levels of functionalization, up to the failing of the Tuinstra–Koenig (T–K) relation, while the functionalization layer remains at monolayer height. The grafting ink, effective for days at room temperature, can be used at ambient conditions and renders the patterning CFG by direct writing as easy as writing on paper. In combination with thermal sample treatment, reversible functionalization is possible by subsequent writing/erasing cycles.
    Keywords covalent functionalization of graphene ; grafting ink ; solvation ; electron transfer ; direct writing ; graphene patterning ; Science ; Q
    Subject code 541
    Language English
    Publishing date 2022-07-01T00:00:00Z
    Publisher Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Halogen Bonding in Two‐Dimensional Crystal Engineering

    Dr. Joan Teyssandier / Dr. Kunal S. Mali / Prof. Steven De Feyter

    ChemistryOpen, Vol 9, Iss 2, Pp 225-

    2020  Volume 241

    Abstract: Abstract Halogen bonds, which provide an intermolecular interaction with moderate strength and high directionality, have emerged as a promising tool in the repertoire of non‐covalent interactions. In this review, we provide a survey of the literature ... ...

    Abstract Abstract Halogen bonds, which provide an intermolecular interaction with moderate strength and high directionality, have emerged as a promising tool in the repertoire of non‐covalent interactions. In this review, we provide a survey of the literature where halogen bonding was used for the fabrication of supramolecular networks on solid surfaces. The definitions of, and the distinction between halogen bonding and halogen‐halogen interactions are provided. Self‐assembled networks formed at the solution/solid interface and at the vacuum‐solid interface, stabilized in part by halogen bonding, are discussed. Besides the broad classification based on the interface at which the systems are studied, the systems are categorized further as those sustained by halogen‐halogen and halogen‐heteroatom contacts.
    Keywords halogen bonding ; halogen-halogen interactions ; 2D crystal engineering ; scanning tunneling microscopy ; self-assembly ; Chemistry ; QD1-999
    Language English
    Publishing date 2020-02-01T00:00:00Z
    Publisher Wiley-VCH
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Tailoring atomic layer growth at the liquid-metal interface

    Hai Cao / Deepali Waghray / Stefan Knoppe / Wim Dehaen / Thierry Verbiest / Steven De Feyter

    Nature Communications, Vol 9, Iss 1, Pp 1-

    2018  Volume 10

    Abstract: Ultrathin metallic films are most often fabricated by atomic or molecular beam epitaxy under ultrahigh vacuum conditions, where it is difficult to control deposition and growth. Here, the authors describe a wet deposition method, using solution-borne ... ...

    Abstract Ultrathin metallic films are most often fabricated by atomic or molecular beam epitaxy under ultrahigh vacuum conditions, where it is difficult to control deposition and growth. Here, the authors describe a wet deposition method, using solution-borne gold nanocluster precursors, to regulate growth of atomically flat gold nanoislands on a surface.
    Keywords Science ; Q
    Language English
    Publishing date 2018-11-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Tailoring atomic layer growth at the liquid-metal interface

    Hai Cao / Deepali Waghray / Stefan Knoppe / Wim Dehaen / Thierry Verbiest / Steven De Feyter

    Nature Communications, Vol 9, Iss 1, Pp 1-

    2018  Volume 10

    Abstract: Ultrathin metallic films are most often fabricated by atomic or molecular beam epitaxy under ultrahigh vacuum conditions, where it is difficult to control deposition and growth. Here, the authors describe a wet deposition method, using solution-borne ... ...

    Abstract Ultrathin metallic films are most often fabricated by atomic or molecular beam epitaxy under ultrahigh vacuum conditions, where it is difficult to control deposition and growth. Here, the authors describe a wet deposition method, using solution-borne gold nanocluster precursors, to regulate growth of atomically flat gold nanoislands on a surface.
    Keywords Science ; Q
    Language English
    Publishing date 2018-11-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article: Structural Insights into the Mechanism of Chiral Recognition and Chirality Transfer in Host–Guest Assemblies at the Liquid–Solid Interface

    Fang, Yuan / Kazukuni Tahara / Oleksandr Ivasenko / Steven De Feyter / Yoshito Tobe

    Journal of physical chemistry. 2018 Apr. 06, v. 122, no. 15

    2018  

    Abstract: Understanding structure–efficiency relationships in chiral recognition and chirality transfer constitutes an important step toward the rational design of improved chiral probes and chirality auxiliaries or inducers. Recently discovered enantioselective ... ...

    Abstract Understanding structure–efficiency relationships in chiral recognition and chirality transfer constitutes an important step toward the rational design of improved chiral probes and chirality auxiliaries or inducers. Recently discovered enantioselective host–guest adsorption opened a new pathway toward the enantioselective reconstruction of on-surface monolayers. In this study, we explored the importance of size matching between host cavity and chiral guest for the efficiency of chiral recognition and subsequent chirality induction in the initially racemic host.
    Keywords adsorption ; enantioselectivity ; liquid-solid interface ; optical isomerism
    Language English
    Dates of publication 2018-0406
    Size p. 8228-8235.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.7b11717
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: Controlled Synthesis of a Helical Conjugated Polythiophene

    Leysen, Pieter / Guy Koeckelberghs / Joan Teyssandier / Steven De Feyter

    Macromolecules. 2018 Apr. 27, v. 51, no. 9

    2018  

    Abstract: Two new polymer systems, poly(3-phenylenevinylene)thiophene (P3PVT) and poly(3-phenyl)thiophene (P3PT), were designed with the aim of obtaining a helical conjugated polymer via a living polymerization. The polymerization proceeded without transfer and ... ...

    Abstract Two new polymer systems, poly(3-phenylenevinylene)thiophene (P3PVT) and poly(3-phenyl)thiophene (P3PT), were designed with the aim of obtaining a helical conjugated polymer via a living polymerization. The polymerization proceeded without transfer and termination reactions via the Kumada catalyst transfer condensative polymerization (KCTCP) mechanism, confirming the living nature of the polymerization. Solvatochroism and circular dichroism (CD) experiments showed the helical nature of P3PVT and the stacking behavior of P3PT in poor solvent conditions. Block copolymers of 3-alkyl-substituted polythiophenes and helical P3PVT were prepared to determine the aggregation behavior of such systems. Solvatochroism, CD, and AFM measurements showed that the blocks influence each other’s behavior. If the P3AT block stacks before the helical P3PVT block organizes, one-handed helix formation is hindered. If helix formation occurs first, the stacking behavior is not influenced.
    Keywords aggregation behavior ; catalysts ; circular dichroism spectroscopy ; composite polymers ; polymerization ; solvents ; thiophene
    Language English
    Dates of publication 2018-0427
    Size p. 3504-3514.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 1491942-4
    ISSN 1520-5835 ; 0024-9297
    ISSN (online) 1520-5835
    ISSN 0024-9297
    DOI 10.1021/acs.macromol.8b00527
    Database NAL-Catalogue (AGRICOLA)

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