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Warias JE, Petersdorf L, Hövelmann SC, Giri RP, Lemke C, Festersen S, Greve M, Mandin P, LeBideau D, Bertram F, Magnussen OM, Murphy BM. The laser pump X-ray probe system at LISA P08 PETRA III. JOURNAL OF SYNCHROTRON RADIATION 2024; 31:779-790. [PMID: 38843001 PMCID: PMC11226150 DOI: 10.1107/s1600577524003400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 04/17/2024] [Indexed: 07/06/2024]
Abstract
Understanding and controlling the structure and function of liquid interfaces is a constant challenge in biology, nanoscience and nanotechnology, with applications ranging from molecular electronics to controlled drug release. X-ray reflectivity and grazing incidence diffraction provide invaluable probes for studying the atomic scale structure at liquid-air interfaces. The new time-resolved laser system at the LISA liquid diffractometer situated at beamline P08 at the PETRA III synchrotron radiation source in Hamburg provides a laser pump with X-ray probe. The femtosecond laser combined with the LISA diffractometer allows unique opportunities to investigate photo-induced structural changes at liquid interfaces on the pico- and nanosecond time scales with pump-probe techniques. A time resolution of 38 ps has been achieved and verified with Bi. First experiments include laser-induced effects on salt solutions and liquid mercury surfaces with static and varied time scales measurements showing the proof of concept for investigations at liquid surfaces.
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Affiliation(s)
- Jonas Erik Warias
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
| | - Lukas Petersdorf
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
- Ruprecht-Haensel Laboratory, Olshausenstrasse 40, 24098Kiel, Germany
| | - Svenja Carolin Hövelmann
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
- Ruprecht-Haensel Laboratory, Olshausenstrasse 40, 24098Kiel, Germany
- Deutsches Elektronen-Synchrotron DESYNotkestrasse 8522607HamburgGermany
| | - Rajendra Prasad Giri
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
| | - Christoph Lemke
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
| | - Sven Festersen
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
| | - Matthias Greve
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
| | | | | | - Florian Bertram
- Deutsches Elektronen-Synchrotron DESYNotkestrasse 8522607HamburgGermany
| | - Olaf Magnus Magnussen
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
- Ruprecht-Haensel Laboratory, Olshausenstrasse 40, 24098Kiel, Germany
| | - Bridget Mary Murphy
- Institute of Experimental and Applied PhysicsKiel UniversityLeibnizstrasse 1924118KielGermany
- Ruprecht-Haensel Laboratory, Olshausenstrasse 40, 24098Kiel, Germany
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2
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Shen C, Zhang H, Ocko BM. Reconstructing the reflectivity of liquid surfaces from grazing incidence X-ray off-specular scattering data. J Appl Crystallogr 2024; 57:714-727. [PMID: 38846761 PMCID: PMC11151673 DOI: 10.1107/s1600576724002887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 04/01/2024] [Indexed: 06/09/2024] Open
Abstract
The capillary wave model of a liquid surface predicts both the X-ray specular reflection and the diffuse scattering around it. A quantitative method is presented to obtain the X-ray reflectivity (XRR) from a liquid surface through the diffuse scattering data around the specular reflection measured using a grazing incidence X-ray off-specular scattering (GIXOS) geometry at a fixed horizontal offset angle with respect to the plane of incidence. With this approach the entire Qz -dependent reflectivity profile can be obtained at a single, fixed incident angle. This permits a much faster acquisition of the profile than with conventional reflectometry, where the incident angle must be scanned point by point to obtain a Qz -dependent profile. The XRR derived from the GIXOS-measured diffuse scattering, referred to in this paper as pseudo-reflectivity, provides a larger Qz range compared with the reflectivity measured by conventional reflectometry. Transforming the GIXOS-measured diffuse scattering profile to pseudo-XRR opens up the GIXOS method to widely available specular XRR analysis software tools. Here the GIXOS-derived pseudo-XRR is compared with the XRR measured by specular reflectometry from two simple vapor-liquid interfaces at different surface tension, and from a hexadecyltri-methyl-ammonium bromide monolayer on a water surface. For the simple liquids, excellent agreement (beyond 11 orders of magnitude in signal) is found between the two methods, supporting the approach of using GIXOS-measured diffuse scattering to derive reflectivities. Pseudo-XRR obtained at different horizontal offset angles with respect to the plane of incidence yields indistinguishable results, and this supports the robustness of the GIXOS-XRR approach. The pseudo-XRR method can be extended to soft thin films on a liquid surface, and criteria are established for the applicability of the approach.
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Affiliation(s)
- Chen Shen
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Honghu Zhang
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Benjamin M. Ocko
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
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3
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Pontoni D, DiMichiel M, Murphy BM, Honkimäki V, Deutsch M. Ordering of ionic liquids at a charged sapphire interface: Evolution with cationic chain length. J Colloid Interface Sci 2024; 661:33-45. [PMID: 38295701 DOI: 10.1016/j.jcis.2024.01.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/09/2024] [Accepted: 01/18/2024] [Indexed: 02/27/2024]
Abstract
HYPOTHESIS Room Temperature Ionic Liquids (RTILs) bulk's molecular layering dominates their structure also at the RTIL/sapphire interface, increasing the layer spacing with the cationic alkyl chain length n. However, the negatively-charged sapphire surface compresses the layers, increases the layering range, and affects the intra-layer structure in yet unknown ways. EXPERIMENTS X-ray reflectivity (XR) off the RTIL/sapphire interface, for a broad homologous RTIL series 1-alkyl-3-methylimidazolium bis(trifluoromethansulfonyl)imide, hitherto unavailable for any RTIL. FINDINGS RTIL layers against the sapphire, exhibit two spacings: da and db. da is n-varying, follows the behavior of the bulk spacing but exhibits a downshift, thus showing significant layer compression, and over twofold polar slab thinning. The latter suggests exclusion of anions from the interfacial region due to the negative sapphire charging by x-ray-released electrons. The layering range is larger than the bulk's. db is short and near n-independent, suggesting polar moieties' layering, the coexistence mode of which with the da-spaced layering is unclear. Comparing the present layering with the bulk's and the RTIL/air interface's provides insight into the Coulomb and dispersion interaction balance dominating the RTIL's structure and the impact thereon of the presence of a charged solid interface.
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Affiliation(s)
- Diego Pontoni
- ESRF - The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Marco DiMichiel
- ESRF - The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Bridget M Murphy
- Institute of Experimental and Applied Physics, Kiel University, Kiel D-24098, Germany; Ruprecht-Haensel Laboratory, Kiel University, Kiel D-24118, Germany
| | - Veijo Honkimäki
- ESRF - The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Moshe Deutsch
- Physics Dept. & Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel.
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4
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Konovalov O, Rein V, Saedi M, Groot IMN, Renaud G, Jankowski M. Tripling of the scattering vector range of X-ray reflectivity on liquid surfaces using a double-crystal deflector. J Appl Crystallogr 2024; 57:258-265. [PMID: 38596733 PMCID: PMC11001415 DOI: 10.1107/s1600576724000657] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 01/18/2024] [Indexed: 04/11/2024] Open
Abstract
The maximum range of perpendicular momentum transfer (q z) has been tripled for X-ray scattering from liquid surfaces when using a double-crystal deflector setup to tilt the incident X-ray beam. This is achieved by employing a higher-energy X-ray beam to access Miller indices of reflecting crystal atomic planes that are three times higher than usual. The deviation from the exact Bragg angle condition induced by misalignment between the X-ray beam axis and the main rotation axis of the double-crystal deflector is calculated, and a fast and straightforward procedure to align them is deduced. An experimental method of measuring scattering intensity along the q z direction on liquid surfaces up to q z = 7 Å-1 is presented, with liquid copper serving as a reference system for benchmarking purposes.
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Affiliation(s)
- Oleg Konovalov
- European Synchrotron Radiation Facility–ESRF, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
| | - Valentina Rein
- European Synchrotron Radiation Facility–ESRF, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
- Univ. Grenoble Alpes, CEA, IRIG/MEM/NR, 38000 Grenoble, France
| | - Mehdi Saedi
- Physics Department, Shahid Beheshti University, 1983969411 Tehran, Iran
| | - Irene M. N. Groot
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
| | - Gilles Renaud
- Univ. Grenoble Alpes, CEA, IRIG/MEM/NR, 38000 Grenoble, France
| | - Maciej Jankowski
- European Synchrotron Radiation Facility–ESRF, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
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5
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Magnussen OM, Drnec J, Qiu C, Martens I, Huang JJ, Chattot R, Singer A. In Situ and Operando X-ray Scattering Methods in Electrochemistry and Electrocatalysis. Chem Rev 2024; 124:629-721. [PMID: 38253355 PMCID: PMC10870989 DOI: 10.1021/acs.chemrev.3c00331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 10/02/2023] [Accepted: 11/13/2023] [Indexed: 01/24/2024]
Abstract
Electrochemical and electrocatalytic processes are of key importance for the transition to a sustainable energy supply as well as for a wide variety of other technologically relevant fields. Further development of these processes requires in-depth understanding of the atomic, nano, and micro scale structure of the materials and interfaces in electrochemical devices under reaction conditions. We here provide a comprehensive review of in situ and operando studies by X-ray scattering methods, which are powerful and highly versatile tools to provide such understanding. We discuss the application of X-ray scattering to a wide variety of electrochemical systems, ranging from metal and oxide single crystals to nanoparticles and even full devices. We show how structural data on bulk phases, electrode-electrolyte interfaces, and nanoscale morphology can be obtained and describe recent developments that provide highly local information and insight into the composition and electronic structure. These X-ray scattering studies yield insights into the structure in the double layer potential range as well as into the structural evolution during electrocatalytic processes and phase formation reactions, such as nucleation and growth during electrodeposition and dissolution, the formation of passive films, corrosion processes, and the electrochemical intercalation into battery materials.
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Affiliation(s)
- Olaf M. Magnussen
- Kiel
University, Institute of Experimental and
Applied Physics, 24098 Kiel, Germany
- Ruprecht-Haensel
Laboratory, Kiel University, 24118 Kiel, Germany
| | - Jakub Drnec
- ESRF,
Experiments Division, 38000 Grenoble, France
| | - Canrong Qiu
- Kiel
University, Institute of Experimental and
Applied Physics, 24098 Kiel, Germany
| | | | - Jason J. Huang
- Department
of Materials Science and Engineering, Cornell
University, Ithaca, New York 14853, United States
| | - Raphaël Chattot
- ICGM,
Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier Cedex 5, France
| | - Andrej Singer
- Department
of Materials Science and Engineering, Cornell
University, Ithaca, New York 14853, United States
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6
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Sharma G, Seth A, Giri RP, Hayen N, Murphy BM, Ghosh SK. Ionic Liquid-Induced Assembly of DNA at Air-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16079-16089. [PMID: 37922422 DOI: 10.1021/acs.langmuir.3c02212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
DNA nanotechnology is the future of many products in the pharmaceutical and cosmetic industries. Self-assembly of this negatively charged biopolymer at surfaces and interfaces is an essential step to elaborate its field of applications. In this study, the ionic liquid (IL) monolayer-assisted self-assembly of DNA macromolecules at the air-water interface has been closely monitored by employing various quantitative techniques, namely, surface pressure-area (π-A) isotherms, surface potential, interfacial rheology, and X-ray reflectivity (XRR). The π-A isotherms reveal that the IL 1,3-didecyl 3-methyl imidazolium chloride induces DNA self-assembly at the interface, leading to a thick viscoelastic film. The interfacial rheology exhibits a notable rise in the viscoelastic modulus as the surface pressure increases. The values of storage and loss moduli measured as a function of strain frequency suggest a relaxation frequency that depends on the length of the macromolecule. The XRR measurements indicate a considerable increase in DNA layer thickness at the elevated surface pressures depending on the number of base pairs of the DNA. The results are considered in terms of the electrostatic and hydrophobic interactions, allowing a quantitative conclusion about the arrangement of DNA strands underneath the monolayer of the ILs at the air-water interface.
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Affiliation(s)
- Gunjan Sharma
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH 91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - Ajit Seth
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH 91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - Rajendra P Giri
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
| | - Nicolas Hayen
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
| | - Bridget M Murphy
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
| | - Sajal K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH 91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
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7
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Warias JE, Reise F, Hövelmann SC, Giri RP, Röhrl M, Kuhn J, Jacobsen M, Chatterjee K, Arnold T, Shen C, Festersen S, Sartori A, Jordt P, Magnussen OM, Lindhorst TK, Murphy BM. Photoinduced bidirectional switching in lipid membranes containing azobenzene glycolipids. Sci Rep 2023; 13:11480. [PMID: 37455299 PMCID: PMC10350456 DOI: 10.1038/s41598-023-38336-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 07/06/2023] [Indexed: 07/18/2023] Open
Abstract
Following the reaction of biological membranes to external stimuli reveals fundamental insights into cellular function. Here, self-assembled lipid monolayers act as model membranes containing photoswitchable azobenzene glycolipids for investigating structural response during isomerization by combining Langmuir isotherms with X-ray scattering. Controlled in-situ trans/cis photoswitching of the azobenzene N = N double bond alters the DPPC monolayer structure, causing reproducible changes in surface pressure and layer thickness, indicating monolayer reorientation. Interestingly, for monolayers containing azobenzene glycolipids, along with the expected DPPC phase transitions an additional discontinuity is observed. The associated reorintation represents a crossover point, with the surface pressure and layer thickness changing in opposite directions above and below. This is evidence that the azobenzene glycolipids themselves change orientation within the monolayer. Such behaviour suggests that azobenzene glycolipids can act as a bidirectional switch in DPPC monolayers providing a tool to investigate membrane structure-function relationships in depth.
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Affiliation(s)
- Jonas E Warias
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
| | - Franziska Reise
- Otto Diels Institute of Organic Chemistry, Kiel University, Otto-Hahn-Platz 3-4, 24118, Kiel, Germany
| | - Svenja C Hövelmann
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany
- Ruprecht Haensel Laboratory, Kiel University, 24118, Kiel, Germany
| | - Rajendra P Giri
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
- Ruprecht Haensel Laboratory, Kiel University, 24118, Kiel, Germany
| | - Michael Röhrl
- Otto Diels Institute of Organic Chemistry, Kiel University, Otto-Hahn-Platz 3-4, 24118, Kiel, Germany
| | - Jule Kuhn
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
| | - Malte Jacobsen
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
| | - Kuntal Chatterjee
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Barkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Thomas Arnold
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OX11 ODE, UK
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
- European Spallation Source ERIC, P.O Box 176, 221 00, Lund, Sweden
| | - Chen Shen
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany
| | - Sven Festersen
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
| | - Andrea Sartori
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
- ESRF-The European Synchrotron, 38043, Grenoble, France
| | - Philipp Jordt
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
| | - Olaf M Magnussen
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany
- Ruprecht Haensel Laboratory, Kiel University, 24118, Kiel, Germany
| | - Thisbe K Lindhorst
- Otto Diels Institute of Organic Chemistry, Kiel University, Otto-Hahn-Platz 3-4, 24118, Kiel, Germany
| | - Bridget M Murphy
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, 24118, Kiel, Germany.
- Ruprecht Haensel Laboratory, Kiel University, 24118, Kiel, Germany.
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8
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Sartori A, Giri RP, Fujii H, Hövelmann SC, Warias JE, Jordt P, Shen C, Murphy BM, Magnussen OM. Role of chemisorbing species in growth at liquid metal-electrolyte interfaces revealed by in situ X-ray scattering. Nat Commun 2022; 13:5421. [PMID: 36109498 PMCID: PMC9477831 DOI: 10.1038/s41467-022-32932-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 08/22/2022] [Indexed: 11/22/2022] Open
Abstract
Liquid-liquid interfaces offer intriguing possibilities for nanomaterials growth. Here, fundamental interface-related mechanisms that control the growth behavior in these systems are studied for Pb halide formation at the interface between NaX + PbX2 (X = F, Cl, Br) and liquid Hg electrodes using in situ X-ray scattering and complementary electrochemical and microscopy measurements. These studies reveal a decisive role of the halide species in nucleation and growth of these compounds. In Cl- and Br-containing solution, deposition starts by rapid formation of well-defined ultrathin (∼7 Å) precursor adlayers, which provide a structural template for the subsequent quasi-epitaxial growth of c-axis oriented Pb(OH)X bulk crystals. In contrast, growth in F-containing solution proceeds by slow formation of a more disordered deposit, resulting in random bulk crystal orientations on the Hg surface. These differences can be assigned to the interface chemistry, specifically halide chemisorption, which steers the formation of these highly textured deposits at the liquid-liquid interface. Growth at liquid-liquid interfaces differ inherently from that on solids, making it attractive for nanomaterial formation. Here, the authors use X-ray scattering to derive a detailed microscopic picture of lead-halide growth on liquid mercury that reveals the key importance of anion adsorption.
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9
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Dogan S, Paulus M, Surmeier G, Foryt K, Brägelmann K, Tolan M. Nondestructive Compression and Fluidization of Phospholipid Monolayers by Gaseous and Aerolized Perfluorocarbons: Promising Substances for Lung Surfactant Treatment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:6690-6699. [PMID: 35588471 DOI: 10.1021/acs.langmuir.2c00617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We present a surface-sensitive X-ray scattering study on the influence of gaseous and aerolized perfluorocarbons (FCs) on zwitterionic and anionic phospholipid Langmuir films, which serve as a simplified model system of lung surfactants. It was found that small gaseous FC molecules like F-propane and F-butane penetrate phospholipid monolayers and accumulate between the alkyl chains and form islands. This clustering process can trigger the formation of lipid crystallites at low initial surface pressures. In contrast, the large linear FC F-octyl bromide fluidizes membranes, causing a dissolution of crystalline domains. The bicyclic FC F-decalin accumulates between the alkyl chains of 1,2-dipalmitoyl phosphatidylcholine but cannot penetrate the more densely packed 1,2-dipalmitoyl phosphatidic acid films because of its size. The effects of FCs on lung surfactants are discussed in the framework of currently proposed therapeutic methods for acute respiratory distress syndrome using FC gases, vapor, or aerosol ventilation causing monolayer fluidization effects. This study implies that the highly biocompatible and nontoxic FCs could be beneficial in the treatment of lung diseases with injured nonfunctional lung surfactants in a novel approach for ventilation.
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Affiliation(s)
- Susanne Dogan
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
| | - Michael Paulus
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
| | - Göran Surmeier
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
| | - Kevin Foryt
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
| | | | - Metin Tolan
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
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10
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Konovalov OV, Belova V, La Porta F, Saedi M, Groot IMN, Renaud G, Snigireva I, Snigirev A, Voevodina M, Shen C, Sartori A, Murphy BM, Jankowski M. X-ray reflectivity from curved surfaces as illustrated by a graphene layer on molten copper. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:711-720. [PMID: 35511004 PMCID: PMC9070704 DOI: 10.1107/s1600577522002053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/21/2022] [Indexed: 06/14/2023]
Abstract
The X-ray reflectivity technique can provide out-of-plane electron-density profiles of surfaces, interfaces, and thin films, with atomic resolution accuracy. While current methodologies require high surface flatness, this becomes challenging for naturally curved surfaces, particularly for liquid metals, due to the very high surface tension. Here, the development of X-ray reflectivity measurements with beam sizes of a few tens of micrometres on highly curved liquid surfaces using a synchrotron diffractometer equipped with a double crystal beam deflector is presented. The proposed and developed method, which uses a standard reflectivity θ-2θ scan, is successfully applied to study in situ the bare surface of molten copper and molten copper covered by a graphene layer grown in situ by chemical vapor deposition. It was found that the roughness of the bare liquid surface of copper at 1400 K is 1.25 ± 0.10 Å, while the graphene layer is separated from the liquid surface by a distance of 1.55 ± 0.08 Å and has a roughness of 1.26 ± 0.09 Å.
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Affiliation(s)
- Oleg V. Konovalov
- ESRF – The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Valentina Belova
- ESRF – The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Francesco La Porta
- ESRF – The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Mehdi Saedi
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
| | - Irene M. N. Groot
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
| | - Gilles Renaud
- Univ. Grenoble Alpes, CEA, IRIG/MEM/NRS, 38000 Grenoble, France
| | - Irina Snigireva
- ESRF – The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Anatoly Snigirev
- Immanuel Kant Baltic Federal University, 14 Nevskogo, 236041 Kaliningrad, Russian Federation
| | - Maria Voevodina
- Immanuel Kant Baltic Federal University, 14 Nevskogo, 236041 Kaliningrad, Russian Federation
| | - Chen Shen
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Andrea Sartori
- Institute for Experimental and Applied Physics, Kiel University, Olshausenstrasse 40, 24098 Kiel, Germany
| | - Bridget M. Murphy
- Institute for Experimental and Applied Physics, Kiel University, Olshausenstrasse 40, 24098 Kiel, Germany
- Ruprecht-Haensel Laboratory, Kiel University, Christian-Albrechts-Platz 4, 24118 Kiel, Germany
| | - Maciej Jankowski
- ESRF – The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France
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11
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Smits J, Prasad Giri R, Shen C, Mendonça D, Murphy B, Huber P, Rezwan K, Maas M. Assessment of nanoparticle immersion depth at liquid interfaces from chemically equivalent macroscopic surfaces. J Colloid Interface Sci 2022; 611:670-683. [PMID: 34974227 DOI: 10.1016/j.jcis.2021.12.113] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 12/14/2021] [Accepted: 12/18/2021] [Indexed: 01/22/2023]
Abstract
HYPOTHESIS We test whether the wettability of nanoparticles (NPs) straddling at an air/water surface or oil/water interface can be extrapolated from sessile drop-derived macroscopic contact angles (mCAs) on planar substrates, assuming that both the nanoparticles and the macroscopic substrates are chemically equivalent and feature the same electrokinetic potential. EXPERIMENTS Pure silica (SiO2) and amino-terminated silica (APTES-SiO2) NPs are compared to macroscopic surfaces with extremely low roughness (root mean square [RMS] roughness ≤ 2 nm) or a roughness determined by a close-packed layer of NPs (RMS roughness ∼ 35 nm). Equivalence of the surface chemistry is assessed by comparing the electrokinetic potentials of the NPs via electrophoretic light scattering and of the macroscopic substrates via streaming current analysis. The wettability of the macroscopic substrates is obtained from advancing (ACAs) and receding contact angles (RCAs) and in situ synchrotron X-ray reflectivity (XRR) provided by the NP wettability at the liquid interfaces. FINDINGS Generally, the RCA on smooth surfaces provides a good estimate of NP wetting properties. However, mCAs alone cannot predict adsorption barriers that prevent NP segregation to the interface, as is the case with the pure SiO2 nanoparticles. This strategy greatly facilitates assessing the wetting properties of NPs for applications such as emulsion formulation, flotation, or water remediation.
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Affiliation(s)
- Joeri Smits
- Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, Bremen D-28359, Germany.
| | - Rajendra Prasad Giri
- Institute of Experimental and Applied Physics, Kiel University, Kiel D-24098, Germany.
| | - Chen Shen
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, Hamburg D-22607, Germany.
| | - Diogo Mendonça
- Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, Bremen D-28359, Germany; Department of Mechanical Engineering, Federal University of Santa Catarina, Florianopolis 88040-900, Brazil.
| | - Bridget Murphy
- Institute of Experimental and Applied Physics, Kiel University, Kiel D-24098, Germany; Ruprecht-Haensel Laboratory, Kiel University, Kiel 24118, Germany.
| | - Patrick Huber
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, Hamburg D-22607, Germany; Hamburg University of Technology, Institute for Materials and X-Ray Physics, Eißendorfer Straße 42, Hamburg 21073, Germany; Hamburg University, Center for Hybrid Nanostructures ChyN, Luruper Chaussee 149, Hamburg 22607, Germany.
| | - Kurosch Rezwan
- Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, Bremen D-28359, Germany; MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, Bremen D-28359, Germany.
| | - Michael Maas
- Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, Bremen D-28359, Germany; MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, Bremen D-28359, Germany.
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12
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Mandal P, Giri RP, Murphy BM, Ghosh SK. Self-Assembly of Graphene Oxide Nanoflakes in a Lipid Monolayer at the Air-Water Interface. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57023-57035. [PMID: 34817153 DOI: 10.1021/acsami.1c19004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The graphene family, especially graphene oxide (GO), has captured increasing prospects in the biomedical field due to its excellent physicochemical properties. Understanding the health and environmental impact of GO is of great importance for guiding future applications. Although their interactions with living organisms are omnipresent, the exact molecular mechanism is yet to be established. The cellular membrane is the first barrier for a foreign molecule to interact before entering into the cell. In the present study, a model system consisting of a lipid monolayer at the air-water interface represents one of the leaflets of this membrane. Surface pressure-area isotherms and advanced synchrotron X-ray scattering techniques have been employed to comprehend the interaction by varying the electrostatics of the membrane. The results depict a strong GO interaction with positively charged phospholipids, weak interaction with zwitterionic lipids, and interestingly negligible interaction with negatively charged lipids. GO flakes induce significant changes in the out-of-plane organization of a positively charged lipid monolayer with a minor influence on in-plane assembly of lipid chains. This interaction is packing-specific, and the influence of GO is much stronger at lower surface pressure. Even though for zwitterionic phospholipids, the GO flakes may partly insert into the lipid chains, the X-ray scattering results indicate that the flakes preferentially lie horizontally underneath the positively charged lipid monolayer. This in-depth structural description may pave new perspectives for the scientific community for the development of GO-based biosensors and biomedical materials.
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Affiliation(s)
- Priya Mandal
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G.B. Nagar, Uttar Pradesh 201314, India
| | - Rajendra P Giri
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
| | - Bridget M Murphy
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
- Ruprecht Haensel Laboratory, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Sajal K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G.B. Nagar, Uttar Pradesh 201314, India
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13
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Rego T, Spagnoli S, Fauré MC, Allain C, Coasne B, Malinge J, Shen C, Fontaine P, Goldmann M. Unexpected Order-Disorder Transition in Diacetylene Alcohol Langmuir Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9034-9042. [PMID: 34297576 DOI: 10.1021/acs.langmuir.1c01038] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The phase diagram of the Langmuir film of diacetylene alcohol-henicosa-5,7-diyn-1-ol-is investigated by means of surface pressure versus surface area isotherms, Brewster angle microscopy, X-ray reflectivity, and grazing incident X-ray diffraction. Among the usual phases described in the generic phase diagram of small head group molecules, one observes an unexpected reversible transition from an ordered condensed phase to a disordered one upon increasing the surface pressure. We postulate that the origin of this unusual, unprecedented transition results from the competition between the interactions between the diacetylene blocks in the hydrophobic chain and the hydrogen bonds between head groups and water.
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Affiliation(s)
- Tomas Rego
- Institut des NanoSciences de Paris, UMR 7588 CNRS, Sorbonne Université, 4 place Jussieu, Paris, CEDEX 75252, France
| | - Sylvie Spagnoli
- LIPhy, CNRS, University Grenoble Alpes, Grenoble 38058, France
| | - Marie-Claude Fauré
- Institut des NanoSciences de Paris, UMR 7588 CNRS, Sorbonne Université, 4 place Jussieu, Paris, CEDEX 75252, France
- UFR des Sciences Fondamentales et Biomédicales, Université de Paris, 45 rue des Saints-Pères, Paris CEDEX 75006, France
| | - Clémence Allain
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, PPSM, Gif-sur-Yvette 91190, France
| | - Benoit Coasne
- LIPhy, CNRS, University Grenoble Alpes, Grenoble 38058, France
| | - Jérémy Malinge
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, PPSM, Gif-sur-Yvette 91190, France
| | - Chen Shen
- DESY Photon Science, Notkestrasse 85, Hamburg D-22607, Germany
| | - Philippe Fontaine
- Institut des NanoSciences de Paris, UMR 7588 CNRS, Sorbonne Université, 4 place Jussieu, Paris, CEDEX 75252, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, BP48, Gif sur Yvette, CEDEX 91192, France
| | - Michel Goldmann
- Institut des NanoSciences de Paris, UMR 7588 CNRS, Sorbonne Université, 4 place Jussieu, Paris, CEDEX 75252, France
- UFR des Sciences Fondamentales et Biomédicales, Université de Paris, 45 rue des Saints-Pères, Paris CEDEX 75006, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, BP48, Gif sur Yvette, CEDEX 91192, France
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14
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Smits J, Giri RP, Shen C, Mendonça D, Murphy B, Huber P, Rezwan K, Maas M. Synergistic and Competitive Adsorption of Hydrophilic Nanoparticles and Oil-Soluble Surfactants at the Oil-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5659-5672. [PMID: 33905659 DOI: 10.1021/acs.langmuir.1c00559] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Fundamental insights into the interplay and self-assembly of nanoparticles and surface-active agents at the liquid-liquid interface play a pivotal role in understanding the ubiquitous colloidal systems present in our natural surroundings, including foods and aquatic life, and in the industry for emulsion stabilization, drug delivery, or enhanced oil recovery. Moreover, well-controlled model systems for mixed interfacial adsorption of nanoparticles and surfactants allow unprecedented insights into nonideal or contaminated particle-stabilized emulsions. Here, we investigate such a model system composed of hydrophilic, negatively, and positively charged silica nanoparticles and the oil-soluble cationic lipid octadecyl amine with in situ synchrotron-based X-ray reflectometry, which is analyzed and discussed jointly with dynamic interfacial tensiometry. Our results indicate that negatively charged silica nanoparticles only adsorb if the oil-water interface is covered with the positively charged lipid, indicating synergistic adsorption. Conversely, the positively charged nanoparticles readily adsorb on their own, but compete with octadecyl amine and reversibly desorb with increasing concentrations of the lipid. These results further indicate that with competitive adsorption, an electrostatic exclusion zone exists around the adsorbed particles. This prevents the adsorption of lipid molecules in this area, leading to a decreased surface excess concentration of surfactants and unexpectedly high interfacial tension.
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Affiliation(s)
- Joeri Smits
- Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, D-28359 Bremen, Germany
| | - Rajendra P Giri
- Institute of Experimental and Applied Physics, Kiel University, D-24098 Kiel, Germany
| | - Chen Shen
- DESY Photon Science, Notkestraße 85, D-22607 Hamburg, Germany
| | - Diogo Mendonça
- Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, D-28359 Bremen, Germany
- Department of Mechanical Engineering, Federal University of Santa Catarina, 88040-900 Florianopolis, Brazil
| | - Bridget Murphy
- Institute of Experimental and Applied Physics, Kiel University, D-24098 Kiel, Germany
- Ruprecht-Haensel Laboratory, Kiel University, 24118 Kiel, Germany
| | - Patrick Huber
- DESY Photon Science, Notkestraße 85, D-22607 Hamburg, Germany
- Institute for Materials and X-Ray Physics, Hamburg University of Technology, Eißendorfer Straße 42, 21073 Hamburg, Germany
- Center for Hybrid Nanostructures ChyN, Hamburg University, Luruper Chaussee 149, 22607 Hamburg, Germany
| | - Kurosch Rezwan
- Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, D-28359 Bremen, Germany
- MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany
| | - Michael Maas
- Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, D-28359 Bremen, Germany
- MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany
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15
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Hong H, Tischler J, Shi X, Highland M. Tunable side-bounce monochromator. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:125-130. [PMID: 33399561 DOI: 10.1107/s1600577520014940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 11/10/2020] [Indexed: 06/12/2023]
Abstract
Side-bounce beamlines with fixed-exit angles have been intended to operate with only one selected energy. However, a tunable monochromator in a new geometry is presented here that will make side-bounce beamlines energy tunable. It requires the addition of two more rotations. Analytic solutions for the values of these two rotation angles are provided. The validity of the new concept was checked by ray tracing and two-dimensional searches in the additional angles. Operational details on the new scheme, including the exit offset and steering of the beams, were determined. In addition to tunability, the new monochromator will reduce the loss from the polarization factor at low energies.
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Affiliation(s)
- Hawoong Hong
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
| | - Jonathan Tischler
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
| | - Xianbo Shi
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
| | - Matthew Highland
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
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16
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Festersen S, Runge B, Koops C, Bertram F, Ocko B, Deutsch M, Murphy BM, Magnussen OM. Nucleation and Growth of PbBrF Crystals at the Liquid Mercury-Electrolyte Interface Studied by Operando X-ray Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10905-10915. [PMID: 32905700 DOI: 10.1021/acs.langmuir.0c01199] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Detailed in operando studies of electrochemically induced PbBrF deposition at the liquid mercury/liquid electrolyte interface are presented. The nucleation and growth were monitored using time-resolved X-ray diffraction and reflectivity combined with electrochemical measurements, revealing a complex potential-dependent behavior. PbBrF deposition commences at potentials above -0.7 V with the rapid formation of an ultrathin adlayer of one unit cell thickness, on top of which (001)-oriented three-dimensional crystallites are formed. Two potential regimes are identified. At low overpotentials, slow growth of a low surface density film of large crystals is observed. At high overpotentials, crossover to a potential-independent morphology occurs, consisting of a compact PbBrF deposit with a saturation thickness of 25 nm, which forms within a few minutes. This potential behavior can be rationalized by the increasing supersaturation near the interface, caused by the potential-dependent Pb2+ deamalgamation, which changes from a slow reaction-controlled process to a fast transport-controlled process in this range of overpotentials. In addition, growth on the liquid substrate is found to involve complex micromechanical effects, such as crystal reorientation and film breakup during dissolution.
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Affiliation(s)
- Sven Festersen
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Benjamin Runge
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Christian Koops
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Florian Bertram
- Deutsches Elektronensynchrotron DESY, 22607 Hamburg, Germany
| | - Ben Ocko
- NSLS-II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Moshe Deutsch
- Physics Department & Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Bridget M Murphy
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
- Ruprecht-Haensel Laboratory, Kiel University, 24118 Kiel, Germany
| | - Olaf M Magnussen
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
- Ruprecht-Haensel Laboratory, Kiel University, 24118 Kiel, Germany
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17
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Katakura S, Amano KI, Sakka T, Bu W, Lin B, Schlossman ML, Nishi N. Evolution and Reversible Polarity of Multilayering at the Ionic Liquid/Water Interface. J Phys Chem B 2020; 124:6412-6419. [PMID: 32600035 DOI: 10.1021/acs.jpcb.0c03711] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Highly correlated positioning of ions underlies Coulomb interactions between ions and electrified interfaces within dense ionic fluids such as biological cells and ionic liquids. Recent work has shown that highly correlated ionic systems behave differently than dilute electrolyte solutions, and interest is focused upon characterizing the electrical and structural properties of the dense electrical double layers (EDLs) formed at internal interfaces. It has been a challenge for experiments to characterize the progressive development of the EDL on the nanoscale as the interfacial electric potential is varied over a range of positive and negative values. Here we address this challenge by measuring X-ray reflectivity from the interface between an ionic liquid (IL) and a dilute aqueous electrolyte solution over a range of interfacial potentials from -450 to 350 mV. The growth of alternately charged cation-rich and anion-rich layers was observed along with a polarity reversal of the layers as the potential changed sign. These data show that the structural development of an ionic multilayer-like EDL with increasing potential is similar to that suggested by phenomenological theories and MD simulations, although our data also reveal that the excess charge beyond the first ionic layer decays more rapidly than predicted.
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Affiliation(s)
- Seiji Katakura
- Department of Energy and Hydrocarbon Chemistry, Kyoto University, Kyoto 615-8510, Japan
| | - Ken-Ichi Amano
- Department of Energy and Hydrocarbon Chemistry, Kyoto University, Kyoto 615-8510, Japan.,Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502, Japan
| | - Tetsuo Sakka
- Department of Energy and Hydrocarbon Chemistry, Kyoto University, Kyoto 615-8510, Japan
| | - Wei Bu
- ChemMatCARS, Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, United States
| | - Binhua Lin
- ChemMatCARS, Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, United States
| | - Mark L Schlossman
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Naoya Nishi
- Department of Energy and Hydrocarbon Chemistry, Kyoto University, Kyoto 615-8510, Japan
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18
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19
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Ciatto G, Aubert N, Lecroard M, Engblom C, Fontaine P, Dubuisson JM, Abiven YM, Janolin PE, Kiat JM, Dumont Y, Berini B, Fouchet A, Keller N. FORTE - a multipurpose high-vacuum diffractometer for tender X-ray diffraction and spectroscopy at the SIRIUS beamline of Synchrotron SOLEIL. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:1374-1387. [PMID: 31274467 DOI: 10.1107/s1600577519003722] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
A new high-vacuum multipurpose diffractometer (called FORTE from the French acronyms of the project) has recently been installed at the tender/hard X-ray SIRIUS beamline of Synchrotron SOLEIL, France. The geometry chosen allows one to work either in the classical Eulerian four-circle geometry for bulk X-ray diffraction (XRD) or in the z-axis geometry for surface XRD. The diffractometer nicely fits the characteristics of the SIRIUS beamline, optimized to work in the 1.1-4.5 keV range, and allows one to perform unprecedented diffraction anomalous fine structure (DAFS) experiments in the tender X-ray region, also around non-specular reflections, covering a large reciprocal-space volume. Installation of an X-ray fluorescence detector on a dedicated flange allows simultaneous DAFS and X-ray absorption (XAS) measurements. The access to the tender X-ray region paves the way to resonant investigations around the L-edges of second-row transition elements which are constituents of functional oxide materials. It also enables access to several edges of interest for semiconductors. Finally, the control architecture based on synchronized Delta Tau units opens up exciting perspectives for improvement of the mechanical sphere of confusion.
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Affiliation(s)
- G Ciatto
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48 F-91192 Gif sur Yvette CEDEX, France
| | - N Aubert
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48 F-91192 Gif sur Yvette CEDEX, France
| | - M Lecroard
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48 F-91192 Gif sur Yvette CEDEX, France
| | - C Engblom
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48 F-91192 Gif sur Yvette CEDEX, France
| | - P Fontaine
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48 F-91192 Gif sur Yvette CEDEX, France
| | - J M Dubuisson
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48 F-91192 Gif sur Yvette CEDEX, France
| | - Y M Abiven
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48 F-91192 Gif sur Yvette CEDEX, France
| | - P E Janolin
- Laboratoire SPMS, UMR CNRS-CentraleSupélec, Bâtiment Gustave Eiffel - MB.105, 8-10 rue Joliot-Curie, 91190 Gif-Sur-Yvette CEDEX, France
| | - J M Kiat
- Laboratoire SPMS, UMR CNRS-CentraleSupélec, Bâtiment Gustave Eiffel - MB.105, 8-10 rue Joliot-Curie, 91190 Gif-Sur-Yvette CEDEX, France
| | - Y Dumont
- Groupe d'Etudes de la Matière Condensée (GEMaC), Université Versailles Saint-Quentin en Yvelines - CNRS, Université Paris-Saclay, Versailles, France
| | - B Berini
- Groupe d'Etudes de la Matière Condensée (GEMaC), Université Versailles Saint-Quentin en Yvelines - CNRS, Université Paris-Saclay, Versailles, France
| | - A Fouchet
- Groupe d'Etudes de la Matière Condensée (GEMaC), Université Versailles Saint-Quentin en Yvelines - CNRS, Université Paris-Saclay, Versailles, France
| | - N Keller
- Groupe d'Etudes de la Matière Condensée (GEMaC), Université Versailles Saint-Quentin en Yvelines - CNRS, Université Paris-Saclay, Versailles, France
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20
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Reise F, Warias JE, Chatterjee K, Krekiehn NR, Magnussen O, Murphy BM, Lindhorst TK. Photoswitchable Glycolipid Mimetics: Synthesis and Photochromic Properties of Glycoazobenzene Amphiphiles. Chemistry 2018; 24:17497-17505. [PMID: 30257037 DOI: 10.1002/chem.201803112] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/06/2018] [Indexed: 11/07/2022]
Abstract
Glycolipids as constituents of cell membranes play an important role in cell membrane functioning. To enable the structural modification of membranes on demand, embedding of photosensitive glycolipid mimetics was envisioned and novel amphiphilic glycolipid mimetics comprising a photoswitchable azobenzene unit were synthesized. In this study, the photochromic properties of these glycolipid mimetics were analyzed by means of UV/Vis spectroscopy and reversible photoswitching. The glycolipids were based on a racemic glycerolipid derivative to be comparable in DPPC (dipalmitoylphosphatidylcholine) phospholipid membrane monolayers. Carbohydrate head groups were altered between a β-glucoside and a β-lactosyl unit, as well as acyl chain lengths between C12 and C16, resulting in altered photoswitching. Langmuir isotherms showed that photoswitching of Langmuir films comprising the synthetic photosensitive glycoamphiphiles was successful.
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Affiliation(s)
- Franziska Reise
- Otto Diels Institute of Organic Chemistry, Christiana Albertina University of Kiel, Otto-Hahn-Platz 3-4, 24118, Kiel, Germany
| | - Jonas E Warias
- Institute of Experimental and Applied Physics, Christiana Albertina University of Kiel, Leibnizstrasse 11-19, 24118, Kiel, Germany
| | - Kuntal Chatterjee
- Institute of Experimental and Applied Physics, Christiana Albertina University of Kiel, Leibnizstrasse 11-19, 24118, Kiel, Germany
| | - Nicolai R Krekiehn
- Institute of Experimental and Applied Physics, Christiana Albertina University of Kiel, Leibnizstrasse 11-19, 24118, Kiel, Germany
| | - Olaf Magnussen
- Institute of Experimental and Applied Physics, Christiana Albertina University of Kiel, Leibnizstrasse 11-19, 24118, Kiel, Germany
| | - Bridget M Murphy
- Institute of Experimental and Applied Physics, Christiana Albertina University of Kiel, Leibnizstrasse 11-19, 24118, Kiel, Germany
| | - Thisbe K Lindhorst
- Otto Diels Institute of Organic Chemistry, Christiana Albertina University of Kiel, Otto-Hahn-Platz 3-4, 24118, Kiel, Germany
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21
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Giri RP, Mukhopadhyay MK, Basak UK, Chakrabarti A, Sanyal MK, Runge B, Murphy BM. Continuous Uptake or Saturation—Investigation of Concentration and Surface-Packing-Specific Hemin Interaction with Lipid Membranes. J Phys Chem B 2018; 122:7547-7554. [DOI: 10.1021/acs.jpcb.8b03327] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. P. Giri
- Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - M. K. Mukhopadhyay
- Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - U. K. Basak
- Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - A. Chakrabarti
- Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - M. K. Sanyal
- Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - B. Runge
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - B. M. Murphy
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
- Ruprecht Haensel Laboratory, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
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22
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Festersen S, Hrkac SB, Koops CT, Runge B, Dane T, Murphy BM, Magnussen OM. X-ray reflectivity from curved liquid interfaces. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:432-438. [PMID: 29488923 DOI: 10.1107/s1600577517018057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 12/18/2017] [Indexed: 06/08/2023]
Abstract
X-ray reflectivity studies of the structure of liquid-vapour and liquid-liquid interfaces at modern sources, such as free-electron lasers, are currently impeded by the lack of dedicated liquid surface diffractometers. It is shown that this obstacle can be overcome by an alternative experimental approach that uses the natural curvature of a liquid drop for variation of the angle of incidence. Two modes of operation are shown: (i) sequential reflectivity measurements by a nanometre beam and (ii) parallel acquisition of large ranges of a reflectivity curve by micrometre beams. The feasibility of the two methods is demonstrated by studies of the Hg/vapour, H2O/vapour and Hg/0.1 M NaF interface. The obtained reflectivity curves match the data obtained by conventional techniques up to 5αc in micro-beam mode and up to 35αc in nano-beam mode, allowing observation of the Hg layering peak.
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Affiliation(s)
- Sven Festersen
- Institute for Experimental and Applied Physics, Kiel University, Kiel, Germany
| | - Stjepan B Hrkac
- Institute for Experimental and Applied Physics, Kiel University, Kiel, Germany
| | - Christian T Koops
- Institute for Experimental and Applied Physics, Kiel University, Kiel, Germany
| | - Benjamin Runge
- Institute for Experimental and Applied Physics, Kiel University, Kiel, Germany
| | - Thomas Dane
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Bridget M Murphy
- Institute for Experimental and Applied Physics, Kiel University, Kiel, Germany
| | - Olaf M Magnussen
- Institute for Experimental and Applied Physics, Kiel University, Kiel, Germany
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23
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Haddad J, Pontoni D, Murphy BM, Festersen S, Runge B, Magnussen OM, Steinrück HG, Reichert H, Ocko BM, Deutsch M. Surface structure evolution in a homologous series of ionic liquids. Proc Natl Acad Sci U S A 2018; 115:E1100-E1107. [PMID: 29358372 PMCID: PMC5819424 DOI: 10.1073/pnas.1716418115] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Interfaces of room temperature ionic liquids (RTILs) are important for both applications and basic science and are therefore intensely studied. However, the evolution of their interface structure with the cation's alkyl chain length [Formula: see text] from Coulomb to van der Waals interaction domination has not yet been studied for even a single broad homologous RTIL series. We present here such a study of the liquid-air interface for [Formula: see text], using angstrom-resolution X-ray methods. For [Formula: see text], a typical "simple liquid" monotonic surface-normal electron density profile [Formula: see text] is obtained, like those of water and organic solvents. For [Formula: see text], increasingly more pronounced nanoscale self-segregation of the molecules' charged moieties and apolar chains yields surface layering with alternating regions of headgroups and chains. The layering decays into the bulk over a few, to a few tens, of nanometers. The layering periods and decay lengths, their linear [Formula: see text] dependence, and slopes are discussed within two models, one with partial-chain interdigitation and the other with liquid-like chains. No surface-parallel long-range order is found within the surface layer. For [Formula: see text], a different surface phase is observed above melting. Our results also impact general liquid-phase issues like supramolecular self-aggregation and bulk-surface structure relations.
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Affiliation(s)
- Julia Haddad
- Physics Department, Bar-Ilan University, Ramat Gan 5290002, Israel
- Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Diego Pontoni
- European Synchrotron Radiation Facility, The European Synchrotron and Partnership for Soft Condensed Matter (PSCM), 38000 Grenoble, France
| | - Bridget M Murphy
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
- Ruprecht Haensel Laboratory, Kiel University, 24098 Kiel, Germany
| | - Sven Festersen
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Benjamin Runge
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Olaf M Magnussen
- Institute for Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
- Ruprecht Haensel Laboratory, Kiel University, 24098 Kiel, Germany
| | - Hans-Georg Steinrück
- Stanford Synchrotron Radiation Laboratory (SSRL) Materials Science Division, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, CA 94025
| | - Harald Reichert
- European Synchrotron Radiation Facility, The European Synchrotron, 38000 Grenoble, France
| | - Benjamin M Ocko
- National Synchrotron Light Source II (NSLS-II), Brookhaven National Laboratory, Upton, NY 11973
| | - Moshe Deutsch
- Physics Department, Bar-Ilan University, Ramat Gan 5290002, Israel;
- Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
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24
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Mars J, Hou B, Weiss H, Li H, Konovalov O, Festersen S, Murphy BM, Rütt U, Bier M, Mezger M. Surface induced smectic order in ionic liquids - an X-ray reflectivity study of [C 22C 1im] +[NTf 2] . Phys Chem Chem Phys 2018; 19:26651-26661. [PMID: 28960006 DOI: 10.1039/c7cp04852a] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Surface induced smectic order was found for the ionic liquid 1-methyl-3-docosylimidazolium bis(trifluoromethlysulfonyl)imide by X-ray reflectivity and grazing incidence scattering experiments. Near the free liquid surface, an ordered structure of alternating layers composed of polar and non-polar moieties is observed. This leads to an oscillatory interfacial profile perpendicular to the liquid surface with a periodicity of 3.7 nm. Small angle X-ray scattering and polarized light microscopy measurements suggest that the observed surface structure is related to fluctuations into a metastable liquid crystalline SmA2 phase that was found by supercooling the bulk liquid. The observed surface ordering persists up to 157 °C, i.e. more than 88 K above the bulk melting temperature of 68.1 °C. Close to the bulk melting point, we find a thickness of the ordered layer of L = 30 nm. The dependency of L(τ) = Λ ln(τ/τ1) vs. reduced temperature τ follows a logarithmic growth law. In agreement with theory, the pre-factor Λ is governed by the correlation length of the isotropic bulk phase.
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Affiliation(s)
- Julian Mars
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
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25
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Reichert P, Kjær KS, Brandt van Driel T, Mars J, Ochsmann JW, Pontoni D, Deutsch M, Nielsen MM, Mezger M. Molecular scale structure and dynamics at an ionic liquid/electrode interface. Faraday Discuss 2018; 206:141-157. [DOI: 10.1039/c7fd00171a] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structural arrangement and dynamics of ions near the IL/electrode interface during charging and discharging was studied by a combination of time resolved X-ray reflectivity and impedance spectroscopy.
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Affiliation(s)
- Peter Reichert
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
- Institute of Physics and MAINZ Graduate School
- Johannes Gutenberg University Mainz
| | - Kasper Skov Kjær
- Centre for Molecular Movies
- Department of Physics
- Technical University of Denmark
- DK-2800 Lyngby
- Denmark
| | - Tim Brandt van Driel
- Centre for Molecular Movies
- Department of Physics
- Technical University of Denmark
- DK-2800 Lyngby
- Denmark
| | - Julian Mars
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
- Institute of Physics and MAINZ Graduate School
- Johannes Gutenberg University Mainz
| | | | - Diego Pontoni
- ESRF – The European Synchrotron and Partnership for Soft Condensed Matter (PSCM)
- 38043 Grenoble
- France
| | - Moshe Deutsch
- Department of Physics
- Institute of Nanotechnology and Advanced Materials
- Bar-Ilan University
- Ramat-Gan 52900
- Israel
| | - Martin Meedom Nielsen
- Centre for Molecular Movies
- Department of Physics
- Technical University of Denmark
- DK-2800 Lyngby
- Denmark
| | - Markus Mezger
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
- Institute of Physics and MAINZ Graduate School
- Johannes Gutenberg University Mainz
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26
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Mocuta C, Stanescu S, Gallard M, Barbier A, Dawiec A, Kedjar B, Leclercq N, Thiaudiere D. Fast X-ray reflectivity measurements using an X-ray pixel area detector at the DiffAbs beamline, Synchrotron SOLEIL. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:204-213. [PMID: 29271769 DOI: 10.1107/s1600577517015703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 10/27/2017] [Indexed: 06/07/2023]
Abstract
This paper describes a method for rapid measurements of the specular X-ray reflectivity signal using an area detector and a monochromatic, well collimated X-ray beam (divergence below 0.01°), combined with a continuous data acquisition mode during the angular movements of the sample and detector. In addition to the total integrated (and background-corrected) reflectivity signal, this approach yields a three-dimensional mapping of the reciprocal space in the vicinity of its origin. Grazing-incidence small-angle scattering signals are recorded simultaneously. Measurements up to high momentum transfer values (close to 0.1 nm-1, also depending on the X-ray beam energy) can be performed in total time ranges as short as 10 s. The measurement time can be reduced by up to 100 times as compared with the classical method using monochromatic X-ray beams, a point detector and rocking scans (integrated reflectivity signal).
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Affiliation(s)
- Cristian Mocuta
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette 91192, France
| | - Stefan Stanescu
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette 91192, France
| | - Manon Gallard
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette 91192, France
| | | | - Arkadiusz Dawiec
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette 91192, France
| | - Bouzid Kedjar
- Institut Pprime, CNRS - University of Poitiers - ENSMA, SP2MI, Futuroscope 86962, France
| | - Nicolas Leclercq
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette 91192, France
| | - Dominique Thiaudiere
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette 91192, France
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27
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Maiti S, Sanyal MK, Jana MK, Runge B, Murphy BM, Biswas K, Rao CNR. Evidence of contact epitaxy in the self-assembly of HgSe nanocrystals formed at a liquid-liquid interface. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:095101. [PMID: 27991441 DOI: 10.1088/1361-648x/aa5471] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The grazing incidence x-ray scattering results presented here show that the self-assembly process of HgSe nanocrystals formed at a liquid-liquid interface is quite different along the in-plane direction and across the interface. In situ x-ray reflectivity and ex situ microscopy measurements suggest quantized out-of-plane growth for HgSe nanoparticles of a size of about [Formula: see text] nm initially. Grazing incidence small-angle x-ray scattering measurements for films transferred from the water-toluene interface at various stages of reaction show that these nanoparticles first form random clusters with an average radius of 2.2 nm, giving rise to equally spaced rings of several orders. Finally, these clusters self-organize into face-centered cubic superstructures, giving sharp x-ray diffraction peaks oriented normal to the liquid-liquid interface with more than 100 nm-coherent domains. We also observed the x-ray diffraction pattern of the HgSe crystalline phase, with the superlattice peaks in these grazing incidence measurements of the transferred films. The electron microscopy and atomic force microscopy results support the x-ray observation of the self-organization of HgSe nanocrystals into close-packed superlattices. These results show that capillary wave fluctuation promotes the oriented attachment of clusters at the liquid-liquid interface, giving direct experimental evidence of contact epitaxy.
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Affiliation(s)
- Santanu Maiti
- Surface Physics and Materials Science Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata, 700064, India
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28
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Murphy BM, Festersen S, Magnussen OM. The Atomic scale structure of liquid metal-electrolyte interfaces. NANOSCALE 2016; 8:13859-13866. [PMID: 27301317 DOI: 10.1039/c6nr01571a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Electrochemical interfaces between immiscible liquids have lately received renewed interest, both for gaining fundamental insight as well as for applications in nanomaterial synthesis. In this feature article we demonstrate that the atomic scale structure of these previously inaccessible interfaces nowadays can be explored by in situ synchrotron based X-ray scattering techniques. Exemplary studies of a prototypical electrochemical system - a liquid mercury electrode in pure NaCl solution - reveal that the liquid metal is terminated by a well-defined atomic layer. This layering decays on length scales of 0.5 nm into the Hg bulk and displays a potential and temperature dependent behaviour that can be explained by electrocapillary effects and contributions of the electronic charge distribution on the electrode. In similar studies of nanomaterial growth, performed for the electrochemical deposition of PbFBr, a complex nucleation and growth behaviour is found, involving a crystalline precursor layer prior to the 3D crystal growth. Operando X-ray scattering measurements provide detailed data on the processes of nanoscale film formation.
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Affiliation(s)
- B M Murphy
- Institute of Experimental and Applied Physics, Kiel University, Leibnizstr. 19, D-24098 Kiel, Germany.
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29
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Vieira CEP, Gasperini AAM, Freitas PPS, Oliveira RG, Cavalcanti LP. Characterization of a Pt mirror to be used to deflect synchrotron radiation beam onto Langmuir monolayers. JOURNAL OF SYNCHROTRON RADIATION 2015; 22:859-861. [PMID: 25931107 DOI: 10.1107/s1600577515001496] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 01/22/2015] [Indexed: 06/04/2023]
Abstract
A homemade mirror for X-rays has been built to prepare a diffraction beamline for liquid surface diffraction and scattering measurements. This simple approach is in operation at the XRD2 bending-magnet beamline at the Brazilian Synchrotron Light Laboratory.
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Affiliation(s)
- Carlos E P Vieira
- Instituto de Ciência e Tecnologia, Universidade Federal de São Paulo, São José dos Campos, São Paulo 12231-280, Brazil
| | - Antonio A M Gasperini
- Brazilian Synchrotron Light Laboratory, CNPEM, CP 6192, Campinas, SP 13083-970, Brazil
| | - Pedro P S Freitas
- Brazilian Synchrotron Light Laboratory, CNPEM, CP 6192, Campinas, SP 13083-970, Brazil
| | - Rafael G Oliveira
- Departamento de Quimica Biológica - CIQUIBIC (CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina
| | - Leide P Cavalcanti
- Brazilian Synchrotron Light Laboratory, CNPEM, CP 6192, Campinas, SP 13083-970, Brazil
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30
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Kamiński DM, Czernel G, Murphy B, Runge B, Magnussen OM, Gagoś M. Effect of cholesterol and ergosterol on the antibiotic amphotericin B interactions with dipalmitoylphosphatidylcholine monolayers: X-ray reflectivity study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2947-53. [PMID: 25128151 DOI: 10.1016/j.bbamem.2014.08.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 07/16/2014] [Accepted: 08/04/2014] [Indexed: 02/06/2023]
Abstract
Amphotericin B is a Streptomyces nodosus metabolite and one of the oldest polyene antibiotics used in the treatment of invasive systemic fungal infections. Despite its over 50-year existence in clinical practice and the recognition of amphotericin B as the gold standard in the treatment of serious systemic mycosis, it still remains one of the most toxic pharmaceuticals. Understanding of the processes at the molecular levels and the interactions between amphotericin B with lipid membranes containing sterols should elucidate the mechanisms of the action and toxicity of this widely used antibiotic. In this work, we use X-ray reflectivity to study the structural changes on a molecular scale after amphotericin B incorporation. These changes are accompanied by an increase in monolayer surface pressure which is more pronounced for ergosterol - rather than cholesterol-rich membranes. The data indicate that this difference is not due to the higher affinity of amphotericin B towards ergosterol-containing membranes but is rather due to a ~3Angstrom corrugation of the monolayer. Furthermore, the total quantity of amphotericin B incorporated into lipid monolayers containing cholesterol and ergosterol is the same.
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Affiliation(s)
- Daniel M Kamiński
- Department of Chemistry, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland.
| | - Grzegorz Czernel
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland
| | - Bridget Murphy
- Institute for Experimental and Applied Physics, University of Kiel, 24098 Kiel, Germany; Ruprecht Haensel Laboratory, University of Kiel, 24098 Kiel, Germany
| | - Benjamin Runge
- Institute for Experimental and Applied Physics, University of Kiel, 24098 Kiel, Germany; Ruprecht Haensel Laboratory, University of Kiel, 24098 Kiel, Germany
| | - Olaf M Magnussen
- Institute for Experimental and Applied Physics, University of Kiel, 24098 Kiel, Germany; Ruprecht Haensel Laboratory, University of Kiel, 24098 Kiel, Germany
| | - Mariusz Gagoś
- Department of Cell Biology, Institute of Biology and Biotechnology, Maria Curie-Skłodowska University, 20-033 Lublin, Poland.
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