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New Class of Polymer Materials-Quasi-Nematic Colloidal Particle Self-Assemblies: The Case of Assemblies of Prolate Spheroidal Poly(Styrene/Polyglycidol) Particles. Polymers (Basel) 2022; 14:polym14224859. [PMID: 36432985 PMCID: PMC9698966 DOI: 10.3390/polym14224859] [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: 09/21/2022] [Revised: 10/25/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
Assemblies of colloidal polymer particles find various applications in many advanced technologies. However, for every type of application, assemblies with properly tailored properties are needed. Until now, attention has been concentrated on the assemblies composed of spherical particles arranged into so-called perfect colloidal crystals and on complex materials containing mixtures of crystal and disordered phases. However, new opportunities are opened by using assemblies of spheroidal particles. In such assemblies, the particles, in addition to the three positional have three angular degrees of freedom. Here, the preparation of 3D assemblies of reference microspheres and prolate spheroidal poly(styrene/polyglycidol) microparticles by deposition from water and water/ethanol media on silicon substrates is reported. The particles have the same polystyrene/polyglycidol composition and the same volumes but differ with respect to their aspect ratio (AR) ranged from 1 to 8.5. SEM microphotographs reveal that particles in the assembly top layers are arranged into the quasi-nematic structures and that the quality of their orientation in the same direction increase with increasing AR. Nano- and microindentation studies demonstrate that interactions of sharp and flat tips with arrays of spheroidal particles lead to different types of particle deformations.
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Dalmis R, Birlik I, Ak Azem NF, Celik E. Structurally colored silica photonic crystal coatings modified by Ce or Eu rare-earth dopants. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Salinas G, Frontana-Uribe BA, Reculusa S, Garrigue P, Kuhn A. Highly Ordered Macroporous Poly-3,4- ortho-xylendioxythiophene Electrodes as a Sensitive Analytical Tool for Heavy Metal Quantification. Anal Chem 2018; 90:11770-11774. [PMID: 30251532 DOI: 10.1021/acs.analchem.8b03779] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Highly ordered macroporous electrodes of the conducting polymer poly-3,4- ortho-xylendioxythiophene (PXDOT) are presented as a sensitive analytical tool for heavy metal ion quantification due to a controlled gain in electroactive area. They were designed by using colloidal crystal templates. A direct correlation between the final number of porous layers and the deposition charge ( Qd) employed for electropolymerization is observed. All the electrodes exhibit a surface-templated structure due to an interaction between the radical cation, formed during the electropolymerization, and the surface groups of the silica beads. The voltamperometric response of the macroporous PXDOT electrodes shows a rather fast electron transfer with Δ Ep values between 70 mV and 110 mV. Square wave anodic stripping voltammetric (SWASV) analysis of Cu2+ as a representative heavy metal ion shows a linear response in the subppm range. As a model application, the efficient quantification of Cu2+ in a commercial mezcal sample is validated by the standard addition method and the results correlate adequately with the values obtained by atomic absorption spectroscopy.
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Affiliation(s)
- Gerardo Salinas
- Univ. Bordeaux, ISM, UMR 5255, Bordeaux INP, Site ENSCBP, F 33607 Pessac , France.,Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM , Toluca 50200 , Estado de México , México
| | - Bernardo A Frontana-Uribe
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM , Toluca 50200 , Estado de México , México.,Instituto de Química , Universidad Nacional Autónoma de México , Circuito Exterior, Ciudad Universidad 04510 , Ciudad de México , México
| | - Stéphane Reculusa
- Univ. Bordeaux, ISM, UMR 5255, Bordeaux INP, Site ENSCBP, F 33607 Pessac , France.,CNRS, ISM, UMR 5255, F-33400 Talence , France
| | - Patrick Garrigue
- Univ. Bordeaux, ISM, UMR 5255, Bordeaux INP, Site ENSCBP, F 33607 Pessac , France.,CNRS, ISM, UMR 5255, F-33400 Talence , France
| | - Alexander Kuhn
- Univ. Bordeaux, ISM, UMR 5255, Bordeaux INP, Site ENSCBP, F 33607 Pessac , France.,CNRS, ISM, UMR 5255, F-33400 Talence , France
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Menzel N, Ortel E, Kraehnert R, Strasser P. Electrocatalysis Using Porous Nanostructured Materials. Chemphyschem 2012; 13:1385-94. [DOI: 10.1002/cphc.201100984] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Indexed: 11/06/2022]
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Lalo H, Bon-Saint-Côme Y, Plano B, Etienne M, Walcarius A, Kuhn A. Site selective generation of sol-gel deposits in layered bimetallic macroporous electrode architectures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2323-2326. [PMID: 22260622 DOI: 10.1021/la204679u] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The elaboration of an original composite bimetallic macroporous electrode containing a site-selective sol-gel deposit is reported. Regular colloidal crystals, obtained by a modified Langmuir-Blodgett approach, are used as templates for the electrogeneration of the desired metals in the form of a well-defined layered bimetallic porous electrode. This porous matrix shows a spatially modulated electroactivity which is subsequently used as a strategy for targeted electrogeneration of a sol-gel deposit, exclusively in one predefined part of the porous electrode.
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Affiliation(s)
- Hélène Lalo
- Université de Bordeaux, ISM, UMR 5255, 16 av. Pey Berland 33607 Pessac, France
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Gosecka M, Griffete N, Mangeney C, Chehimi MM, Slomkowski S, Basinska T. Preparation and optical properties of novel bioactive photonic crystals obtained from core-shell poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) microspheres. Colloid Polym Sci 2011; 289:1511-1518. [PMID: 21892246 PMCID: PMC3140920 DOI: 10.1007/s00396-011-2447-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Revised: 05/06/2011] [Accepted: 05/11/2011] [Indexed: 11/15/2022]
Abstract
Optical properties of polymer microspheres with polystyrene cores and polyglycidol-enriched shells poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) (P(S/PGL) particles with number average diameters Dn determined by scanning electron microscopy equal 237 and 271 nm), were studied before and after immobilization of ovalbumin. The particles were synthesized by emulsifier-free emulsion copolymerization of styrene and polyglycidol macromonomer (poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol)) initiated with potassium persulfate. Molar fraction of polyglycidol units in the interfacial layer of the microspheres determined by XPS was equal 42.6 and 34.0%, for the particles with Dn equal 137 and 271 nm, respectively. Colloidal crystals from the aforementioned particles were prepared by deposition of particle suspensions on the glass slides and subsequent evaporation of water. It was found that optical properties of colloidal crystals from the P(S/PGL) microspheres strongly depend on modification of their interfacial layer by covalent immobilization of ovalbumin. The coating of particles with ovalbumin resulted in decreasing their refractive index from 1.58 to 1.52.
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Lenz J, Trieu V, Hempelmann R, Kuhn A. Ordered Macroporous Ruthenium Oxide Electrodes for Potentiometric and Amperometric Sensing Applications. ELECTROANAL 2011. [DOI: 10.1002/elan.201000726] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yuan R, Lin C, Wu B, Fu X. Synthesis of SnO2, Fe2O3, and BiOCl Fibers from Inorganic Salts by a Templating Route. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900433] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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