1
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Poirier A, Le Griel P, Perez J, Baccile N. Cation-Induced Fibrillation of Microbial Glycolipid Biosurfactant Probed by Ion-Resolved In Situ SAXS. J Phys Chem B 2022; 126:10528-10542. [PMID: 36475558 DOI: 10.1021/acs.jpcb.2c03739] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Biological amphiphiles are molecules with a rich phase behavior. Micellar, vesicular, and even fibrillar phases can be found for the same molecule by applying a change in pH or by selecting the appropriate metal ion. The rich phase behavior paves the way toward a broad class of soft materials, from carriers to hydrogels. The present work contributes to understanding the fibrillation of a microbial glycolipid, glucolipid G-C18:1, produced by Starmerella bombicola ΔugtB1 and characterized by a micellar phase at alkaline pH and a vesicular phase at acidic pH. Fibrillation and prompt hydrogelation is triggered by adding either alkaline earth, Ca2+, or transition metal, Ag+, Fe2+, Al3+, ions to a G-C18:1 micellar solution. A specifically designed apparatus coupled to a synchrotron SAXS beamline allows the performing of simultaneous cation- and pH-resolved in situ monitoring of the morphological evolution from spheroidal micelles to crystalline fibers, when Ca2+ is employed, or to wormlike aggregates, when Fe2+ or Al3+ solutions are employed. The fast reactivity of Ag+ and the crystallinity of Ca2+-induced fibers suggest that fibrillation is driven by direct metal-ligand interactions, while the shape transition from spheroidal to elongated micelles with Fe2+ or Al3+ rather suggest charge screening between the lipid and the hydroxylated cation species.
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Affiliation(s)
- Alexandre Poirier
- Sorbonne Université, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR CNRS 7574, 4 place Jussieu, ParisF-75005, France
| | - Patrick Le Griel
- Sorbonne Université, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR CNRS 7574, 4 place Jussieu, ParisF-75005, France
| | - Javier Perez
- SWING Beamline, Synchrotron SOLEIL, L'Orme des Merisiers, 91190Saint-Aubin, France
| | - Niki Baccile
- Sorbonne Université, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR CNRS 7574, 4 place Jussieu, ParisF-75005, France
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2
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Gangemi CMA, Salerno TMG, Barattucci A, Cucinotta F, Bonaccorsi P, Calabrese G, Poma P, Rizzo MG, Campagna S, Puntoriero F. A Curcumin-BODIPY Dyad and Its Silica Hybrid as NIR Bioimaging Probes. Int J Mol Sci 2022; 23:ijms23179542. [PMID: 36076937 PMCID: PMC9455722 DOI: 10.3390/ijms23179542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/17/2022] [Accepted: 08/22/2022] [Indexed: 11/21/2022] Open
Abstract
In this paper we describe the synthesis of a novel bichromophoric system in which an efficient photoinduced intercomponent energy transfer process is active. The dyad consists of one subunit of curcumin and one of BODIPY and is able to emit in the far-red region, offering a large Stokes shift, capable of limiting light scattering processes for applications in microscopy. The system has been encapsulated in MCM-41 nanoparticles with dimensions between 50 and 80 nm. Both the molecular dyad and individual subunits were tested with different cell lines to study their effective applicability in bioimaging. MCM-41 nanoparticles showed no reduction in cell viability, indicating their biocompatibility and bio-inertness and making them capable of delivering organic molecules even in aqueous-based formulations, avoiding the toxicity of organic solvents. Encapsulation in the porous silica structure directed the location of the bichromophoric system within cytoplasm, while the dyad alone stains the nucleus of the hFOB cell line.
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Affiliation(s)
- Chiara Maria Antonietta Gangemi
- Dipartimento di Scienze Chimiche Biologiche Farmaceutiche ed Ambientali (CHIBIOFARAM), Università degli Studi di Messina, 98166 Messina, Italy
| | - Tania Maria Grazia Salerno
- Dipartimento di Scienze Chimiche Biologiche Farmaceutiche ed Ambientali (CHIBIOFARAM), Università degli Studi di Messina, 98166 Messina, Italy
| | - Anna Barattucci
- Dipartimento di Scienze Chimiche Biologiche Farmaceutiche ed Ambientali (CHIBIOFARAM), Università degli Studi di Messina, 98166 Messina, Italy
| | - Fabio Cucinotta
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
- Correspondence: (F.C.); (P.B.)
| | - Paola Bonaccorsi
- Dipartimento di Scienze Chimiche Biologiche Farmaceutiche ed Ambientali (CHIBIOFARAM), Università degli Studi di Messina, 98166 Messina, Italy
- Correspondence: (F.C.); (P.B.)
| | - Giovanna Calabrese
- Dipartimento di Scienze Chimiche Biologiche Farmaceutiche ed Ambientali (CHIBIOFARAM), Università degli Studi di Messina, 98166 Messina, Italy
| | - Paola Poma
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, 90128 Palermo, Italy
| | - Maria Giovanna Rizzo
- Dipartimento di Scienze Chimiche Biologiche Farmaceutiche ed Ambientali (CHIBIOFARAM), Università degli Studi di Messina, 98166 Messina, Italy
| | - Sebastiano Campagna
- Dipartimento di Scienze Chimiche Biologiche Farmaceutiche ed Ambientali (CHIBIOFARAM), Università degli Studi di Messina, 98166 Messina, Italy
| | - Fausto Puntoriero
- Dipartimento di Scienze Chimiche Biologiche Farmaceutiche ed Ambientali (CHIBIOFARAM), Università degli Studi di Messina, 98166 Messina, Italy
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3
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Lombardo D, Calandra P, Kiselev MA. Structural Characterization of Biomaterials by Means of Small Angle X-rays and Neutron Scattering (SAXS and SANS), and Light Scattering Experiments. Molecules 2020; 25:E5624. [PMID: 33260426 PMCID: PMC7730346 DOI: 10.3390/molecules25235624] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 11/25/2020] [Accepted: 11/26/2020] [Indexed: 12/13/2022] Open
Abstract
Scattering techniques represent non-invasive experimental approaches and powerful tools for the investigation of structure and conformation of biomaterial systems in a wide range of distances, ranging from the nanometric to micrometric scale. More specifically, small-angle X-rays and neutron scattering and light scattering techniques represent well-established experimental techniques for the investigation of the structural properties of biomaterials and, through the use of suitable models, they allow to study and mimic various biological systems under physiologically relevant conditions. They provide the ensemble averaged (and then statistically relevant) information under in situ and operando conditions, and represent useful tools complementary to the various traditional imaging techniques that, on the contrary, reveal more local structural information. Together with the classical structure characterization approaches, we introduce the basic concepts that make it possible to examine inter-particles interactions, and to study the growth processes and conformational changes in nanostructures, which have become increasingly relevant for an accurate understanding and prediction of various mechanisms in the fields of biotechnology and nanotechnology. The upgrade of the various scattering techniques, such as the contrast variation or time resolved experiments, offers unique opportunities to study the nano- and mesoscopic structure and their evolution with time in a way not accessible by other techniques. For this reason, highly performant instruments are installed at most of the facility research centers worldwide. These new insights allow to largely ameliorate the control of (chemico-physical and biologic) processes of complex (bio-)materials at the molecular length scales, and open a full potential for the development and engineering of a variety of nano-scale biomaterials for advanced applications.
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Affiliation(s)
- Domenico Lombardo
- CNR-IPCF, Consiglio Nazionale delle Ricerche, Istituto per i Processi Chimico-Fisici, 98158 Messina, Italy
| | - Pietro Calandra
- CNR-ISMN, Consiglio Nazionale delle Ricerche, Istituto Studio Materiali Nanostrutturati, 00015 Roma, Italy;
| | - Mikhail A. Kiselev
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, 141980 Moscow, Russia;
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4
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de Campos AFP, Ferreira ARO, da Silva LL, Neto PPM, Cardoso D. Synthesis and properties of hybrid silicas containing alkylammonium surfactants. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.10.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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5
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Ma J, Sun J, Fan L, Bai S, Panezai H, Jiao Y. Fractal evolution of dual pH- and temperature-responsive P(NIPAM-co-AA)@BMMs with bimodal mesoporous silica core and coated-copolymer shell during drug delivery procedure via SAXS characterization. ARAB J CHEM 2020; 13:4147-61. [DOI: 10.1016/j.arabjc.2019.06.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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6
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Xu J, Wang Z, Zhang F, Peng S, Zhang J, Zhang L. Directed Self-Assembly of Patchy Microgels into Anisotropic Nanostructures. Macromol Rapid Commun 2019; 41:e1900505. [PMID: 31793720 DOI: 10.1002/marc.201900505] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 10/27/2019] [Indexed: 11/08/2022]
Abstract
Multi-geometry nanostructures with high-order, complex, and controllable geometries have attracted extensive attention in the development of functional nanomaterials. A simple and versatile strategy is proposed to construct various anisotropic nanostructures through the directed self-assembly (DSA) of patchy microgels. A general criterion for interaction parameters is developed by the variance analysis method to achieve the formation of 1D nanorods by the single directional DSA process, and 2D or 3D polymorphs including V/T/h/cross shapes, multiple arms, multi-directional bending, single/multiple rings, nanocages, etc., by the multi-directional DSA process of binary microgel blends. At the optimum interaction parameters, the nanorods exhibit the quickest formation process and the most thermodynamically stable geometry, while the various 2D or 3D assemblies exhibit controlled jointing behaviors for versatile assembly geometries. The number of recognition sites on the patchy microgel surface guides the aggregation modes of microgels during the DSA process. These assemblies can bear large curvature variance with the increase of shear rates due to the high flexibility and the ability of adjusting orientation spontaneously. The DSA behavior of patchy microgels differs from the traditional self-assembly process of block copolymers, which may open a new route for guiding the formation of controllable nanoparticle architectures.
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Affiliation(s)
- Jianchang Xu
- Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Zhikun Wang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Fusheng Zhang
- Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Shiyuan Peng
- Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Jing Zhang
- Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Lijuan Zhang
- Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
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7
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Santana Vega M, Guerrero Martínez A, Cucinotta F. Facile Strategy for the Synthesis of Gold@Silica Hybrid Nanoparticles with Controlled Porosity and Janus Morphology. Nanomaterials (Basel) 2019; 9:E348. [PMID: 30832432 PMCID: PMC6473971 DOI: 10.3390/nano9030348] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 02/22/2019] [Accepted: 02/26/2019] [Indexed: 12/31/2022]
Abstract
Hybrid materials prepared by encapsulation of plasmonic nanoparticles in porous silica systems are of increasing interest due to their high chemical stability and applications in optics, catalysis and biological sensing. Particularly promising is the possibility of obtaining gold@silica nanoparticles (Au@SiO₂ NPs) with Janus morphology, as the induced anisotropy can be further exploited to achieve selectivity and directionality in physical interactions and chemical reactivity. However, current methods to realise such systems rely on the use of complex procedures based on binary solvent mixtures and varying concentrations of precursors and reaction conditions, with reproducibility limited to specific Au@SiO₂ NP types. Here, we report a simple one-pot protocol leading to controlled crystallinity, pore order, monodispersity, and position of gold nanoparticles (AuNPs) within mesoporous silica by the simple addition of a small amount of sodium silicate. Using a fully water-based strategy and constant content of synthetic precursors, cetyl trimethylammonium bromide (CTAB) and tetraethyl orthosilicate (TEOS), we prepared a series of four silica systems: (A) without added silicate, (B) with added silicate, (C) with AuNPs and without added silicate, and (D) with AuNPs and with added silicate. The obtained samples were characterised by transmission electron microscopy (TEM), small angle X-ray scattering (SAXS), and UV-visible spectroscopy, and kinetic studies were carried out by monitoring the growth of the silica samples at different stages of the reaction: 1, 10, 15, 30 and 120 min. The analysis shows that the addition of sodium silicate in system B induces slower MCM-41 nanoparticle (MCM-41 NP) growth, with consequent higher crystallinity and better-defined hexagonal columnar porosity than those in system A. When the synthesis was carried out in the presence of CTAB-capped AuNPs, two different outcomes were obtained: without added silicate, isotropic mesoporous silica with AuNPs located at the centre and radial pore order (C), whereas the addition of silicate produced Janus-type Au@SiO₂ NPs (D) in the form of MCM-41 and AuNPs positioned at the silica⁻water interface. Our method was nicely reproducible with gold nanospheres of different sizes (10, 30, and 68 nm diameter) and gold nanorods (55 × 19 nm), proving to be the simplest and most versatile method to date for the realisation of Janus-type systems based on MCM-41-coated plasmonic nanoparticles.
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Affiliation(s)
- Marina Santana Vega
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK.
| | - Andrés Guerrero Martínez
- Departamento de Química Física, Universidad Complutense de Madrid, Avenida Complutense s/n, 28040 Madrid, Spain.
| | - Fabio Cucinotta
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK.
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8
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Schaeffer N, Pérez-Sánchez G, Passos H, Gomes JRB, Papaiconomou N, Coutinho JAP. Mechanisms of phase separation in temperature-responsive acidic aqueous biphasic systems. Phys Chem Chem Phys 2019; 21:7462-7473. [DOI: 10.1039/c8cp07750a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The thermal and acid responsive behaviour of bulky phosphonium-based ILs is elucidated using a mixed experimental and computational approach.
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Affiliation(s)
- Nicolas Schaeffer
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - German Pérez-Sánchez
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Helena Passos
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - José R. B. Gomes
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | | | - João A. P. Coutinho
- CICECO – Aveiro Institute of Materials
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
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9
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Zapelini IW, Silva LL, Cardoso D. Effect of Hydrothermal Treatment on Structural and Catalytic Properties of [CTA]-MCM-41 Silica. Materials (Basel) 2018; 11:ma11050860. [PMID: 29883436 PMCID: PMC5978237 DOI: 10.3390/ma11050860] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 05/17/2018] [Accepted: 05/18/2018] [Indexed: 11/30/2022]
Abstract
The [CTA]-MCM-41 hybrid silica is a useful and simply prepared heterogeneous basic catalyst for the transesterification reaction. Here, the effect of hydrothermal treatment during catalyst preparation was investigated, with the aim of improving the structural stability of this catalyst during the reaction. It was observed that the hydrothermal step led to the formation of a material with a higher degree of organization and a greater wall thickness, which improved its structural stability. However, the catalyst prepared using this treatment presented lower catalytic activity, due to the presence of fewer active sites.
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Affiliation(s)
- Iago W Zapelini
- Catalysis Laboratory, Chemical Engineering Department, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil.
| | - Laura L Silva
- Catalysis Laboratory, Chemical Engineering Department, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil.
| | - Dilson Cardoso
- Catalysis Laboratory, Chemical Engineering Department, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil.
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10
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Hayward DW, Chiappisi L, Prévost S, Schweins R, Gradzielski M. A Small-Angle Neutron Scattering Environment for In-Situ Observation of Chemical Processes. Sci Rep 2018; 8:7299. [PMID: 29740024 DOI: 10.1038/s41598-018-24718-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/03/2018] [Indexed: 12/18/2022] Open
Abstract
A new sample environment for the observation of ongoing chemical reactions is introduced for small-angle neutron scattering (SANS) experiments which enables structural changes to be followed continuously across a wide Q-range in response to changes in the chemical environment. The approach is demonstrated and validated by performing single and multiple potentiometric titrations on an aqueous anionic surfactant solution (oligo-oxyethylene alkylether carboxylic acid in D2O) with addition times varying from 1 s to 2 h. It is shown that the continuous flow set-up offers considerable advantages over classical ‘static’ measurements with regards to sample throughput, compositional precision and the ability to observe fast structural transitions. Finally, the capabilities and ongoing optimisation of the sample environment are discussed with reference to potential applications in the fields of biology, colloidal systems and complex soft matter.
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11
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Luo L, Liang Y, Erichsen ES, Anwander R. Monodisperse mesoporous silica nanoparticles of distinct topology. J Colloid Interface Sci 2017; 495:84-93. [DOI: 10.1016/j.jcis.2017.01.107] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 01/25/2017] [Accepted: 01/27/2017] [Indexed: 11/25/2022]
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12
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Calabrese MA, Wagner NJ, Rogers SA. An optimized protocol for the analysis of time-resolved elastic scattering experiments. Soft Matter 2016; 12:2301-2308. [PMID: 26781708 DOI: 10.1039/c5sm03039k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A deconvolution protocol is developed for obtaining material responses from time-resolved small-angle scattering data from light (SALS), X-rays (SAXS), or neutrons (SANS). Previously used methods convolve material responses with information from the procedure used to group data into discrete time intervals, known as binning. We demonstrate that enhanced signal resolution can be obtained by using methods of signal processing to analyze time-resolved scattering data. The method is illustrated for a time-resolved rheo-SANS measurement of a complex, structured surfactant solution under oscillatory shear flow. We show how the underlying material response can be clearly decoupled from the binning procedure. This method greatly reduces the experimental acquisition time, by approximately one-third for the aforementioned rheo-SANS experiment.
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Affiliation(s)
- Michelle A Calabrese
- University of Delaware Department of Chemical and Biomolecular Engineering, Center for Neutron Science, 150 Academy St., Newark, DE, USA.
| | - Norman J Wagner
- University of Delaware Department of Chemical and Biomolecular Engineering, Center for Neutron Science, 150 Academy St., Newark, DE, USA.
| | - Simon A Rogers
- University of Delaware Department of Chemical and Biomolecular Engineering, Center for Neutron Science, 150 Academy St., Newark, DE, USA.
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13
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Cuvier A, Babonneau F, Berton J, Stevens CV, Fadda GC, Péhau‐Arnaudet G, Le Griel P, Prévost S, Perez J, Baccile N. Nanoscale Platelet Formation by Monounsaturated and Saturated Sophorolipids under Basic pH Conditions. Chemistry 2015; 21:19265-77. [DOI: 10.1002/chem.201502933] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Indexed: 12/15/2022]
Affiliation(s)
- Anne‐Sophie Cuvier
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France UMR 7574, Chimie de la Matière Condensée de Paris, UMR 7574, 75005 Paris (France)
| | - Florence Babonneau
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France UMR 7574, Chimie de la Matière Condensée de Paris, UMR 7574, 75005 Paris (France)
| | - Jan Berton
- SynBioC, Department of Sustainable Organic Chemistry and Technology, Ghent University, Ghent (Belgium)
| | - Christian V. Stevens
- SynBioC, Department of Sustainable Organic Chemistry and Technology, Ghent University, Ghent (Belgium)
| | - Giulia C. Fadda
- Laboratoire Léon Brillouin, LLB, CEA Saclay, 91191 Gif‐sur‐Yvette Cedex (France)
| | | | - Patrick Le Griel
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France UMR 7574, Chimie de la Matière Condensée de Paris, UMR 7574, 75005 Paris (France)
| | - Sylvain Prévost
- ESRF ‐ The European Synchrotron, High Brilliance Beamline ID02, 38043 Grenoble (France)
| | - Javier Perez
- SWING, Synchrotron Soleil, BP 48, 91192 Gif‐sur‐Yvette, (France)
| | - Niki Baccile
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France UMR 7574, Chimie de la Matière Condensée de Paris, UMR 7574, 75005 Paris (France)
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14
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Yi Z, Dumée LF, Garvey CJ, Feng C, She F, Rookes JE, Mudie S, Cahill DM, Kong L. A New Insight into Growth Mechanism and Kinetics of Mesoporous Silica Nanoparticles by in Situ Small Angle X-ray Scattering. Langmuir 2015; 31:8478-87. [PMID: 26158700 DOI: 10.1021/acs.langmuir.5b01637] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The growth mechanism and kinetics of mesoporous silica nanoparticles (MSNs) were investigated for the first time by using a synchrotron time-resolved small-angle X-ray scattering (SAXS) analysis. The synchrotron SAXS offers unsurpassed time resolution and the ability to detect structural changes of nanometer sized objects, which are beneficial for the understanding of the growth mechanism of small MSNs (∼20 nm). The Porod invariant was used to quantify the conversion of tetraethyl orthosilicate (TEOS) in silica during MSN formation, and the growth kinetics were investigated at different solution pH and temperature through calculating the scattering invariant as a function of reaction time. The growth of MSNs was found to be accelerated at high temperature and high pH, resulting in a higher rate of silica formation. Modeling SAXS data of micelles, where a well-defined electrostatic interaction is assumed, determines the size and shape of hexadecyltrimethylammonium bromide (CTAB) micelles before and after the addition of TEOS. The results suggested that the micelle size increases and the micelle shape changes from ellipsoid to spherical, which might be attributed to the solubilization of TEOS in the hydrophobic core of CTAB micelles. A new "swelling-shrinking" mechanism is proposed. The mechanism provides new insights into understanding MSN growth for the formation of functional mesoporous materials exhibiting controlled morphologies. The SAXS analyses were correlated to the structure of CTAB micelles and chemical reaction of TEOS. This study has provided critical information to an understanding of the growth kinetics and mechanism of MSNs.
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Affiliation(s)
- Zhifeng Yi
- †Institute for Frontier Materials, Deakin University, Geelong Campus at Waurn Ponds, Geelong, Victoria 3216, Australia
| | - Ludovic F Dumée
- †Institute for Frontier Materials, Deakin University, Geelong Campus at Waurn Ponds, Geelong, Victoria 3216, Australia
| | - Christopher J Garvey
- ‡Australian Nuclear Science and Technology Organization, Lucas Heights, New South Wales 2234, Australia
| | - Chunfang Feng
- †Institute for Frontier Materials, Deakin University, Geelong Campus at Waurn Ponds, Geelong, Victoria 3216, Australia
| | - Fenghua She
- †Institute for Frontier Materials, Deakin University, Geelong Campus at Waurn Ponds, Geelong, Victoria 3216, Australia
| | - James E Rookes
- §Centre for Chemistry and Biotechnology, School of Life and Environmental Sciences, Deakin University, Geelong Campus at Waurn Ponds, Geelong, Victoria 3216, Australia
| | - Stephen Mudie
- ∥Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3169, Australia
| | - David M Cahill
- §Centre for Chemistry and Biotechnology, School of Life and Environmental Sciences, Deakin University, Geelong Campus at Waurn Ponds, Geelong, Victoria 3216, Australia
| | - Lingxue Kong
- †Institute for Frontier Materials, Deakin University, Geelong Campus at Waurn Ponds, Geelong, Victoria 3216, Australia
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15
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Nayeri M, Nygård K, Karlsson M, Maréchal M, Burghammer M, Reynolds M, Martinelli A. The role of the ionic liquid C6C1ImTFSI in the sol–gel synthesis of silica studied using in situ SAXS and Raman spectroscopy. Phys Chem Chem Phys 2015; 17:9841-8. [DOI: 10.1039/c5cp00709g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural and chemical changes during the sol–gel synthesis of silica using an ionic liquid are investigatedin situand simultaneously by X-ray scattering and μ-Raman spectroscopy.
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Affiliation(s)
- Moheb Nayeri
- Department of Chemistry and Chemical Engineering
- Chalmers University of Technology
- Gothenburg
- Sweden
| | - Kim Nygård
- Department of Chemistry and Molecular Biology
- University of Gothenburg
- Sweden
| | - Maths Karlsson
- Department of Applied Physics
- Chalmers University of Technology
- Gothenburg
- Sweden
| | | | | | - Michael Reynolds
- European Synchrotron Radiation Facility (ESRF)
- 38000 Grenoble
- France
| | - Anna Martinelli
- Department of Chemistry and Chemical Engineering
- Chalmers University of Technology
- Gothenburg
- Sweden
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Martinelli A. Effects of a protic ionic liquid on the reaction pathway during non-aqueous sol-gel synthesis of silica: a Raman spectroscopic investigation. Int J Mol Sci 2014; 15:6488-503. [PMID: 24743891 PMCID: PMC4013642 DOI: 10.3390/ijms15046488] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2014] [Revised: 03/25/2014] [Accepted: 03/31/2014] [Indexed: 11/16/2022] Open
Abstract
The reaction pathway during the formation of silica via a two-component "non-aqueou" sol-gel synthesis is studied by in situ time-resolved Raman spectroscopy. This synthetic route is followed with and without the addition of the protic ionic liquid 1-ethylimidazolium bis(trifluoromethanesulfonyl)imide (C2HImTFSI) in order to investigate its effect on the reaction pathway. We demonstrate that Raman spectroscopy is suitable to discriminate between different silica intermediates, which are produced and consumed at different rates with respect to the point of gelation. We find that half-way to gelation monomers and shorter chains are the most abundant silica species, while the formation of silica rings strongly correlates to the sol-to-gel transition. Thus, curling up of linear chains is here proposed as a plausible mechanism for the formation of small rings. These in turn act as nucleation sites for the condensation of larger rings and thus the formation of the open and polymeric silica network. We find that the protic ionic liquid does not change the reaction pathway per se, but accelerates the cyclization process, intermediated by the faster inclusion of monomeric species.
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Affiliation(s)
- Anna Martinelli
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 4, 41296 Göteborg, Sweden.
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Youngs TGA, Manyar H, Bowron DT, Gladden LF, Hardacre C. Probing chemistry and kinetics of reactions in heterogeneous catalysts. Chem Sci 2013. [DOI: 10.1039/c3sc51477c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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