GUEGAN, Regis

写真a

Affiliation

Faculty of Science and Engineering, Global Center for Science and Engineering

Job title

Associate Professor(without tenure)

Profile

Two dimensional (2D) atomic crystals or nanosheets constitute exciting nanomaterials with fascinating properties and the self-organization in various liquid crystalline phases that can be used as template systems to organize further organic systems. Besides the potentialities of nanosheets in materials field, the association with other colloidal systems represents a certain challenge since it results from a fragile energy landscape with the possibility of phase segregation. My research activities aim at understanding the stability and the microstructures generated from the mixtures of inorganic particles associated with membrane phases made of surfactants, lipids and other apparent biological systems that may mimic cell envelope, as new routes to prepare biosensors and other nanomaterials.

Research Institute 【 display / non-display

  • 2020
    -
    2022

    理工学術院総合研究所   兼任研究員

Education 【 display / non-display

  • 2018.01
     
     

    Ability to supervise, the University of Orleans  

  • 2003.10
    -
    2006.09

    PhD in Physics, The University of Rennes I  

  • 2000.09
    -
    2003.07

    Materials Engineering School, The University of Rennes I  

  • 2002.09
    -
    2003.06

    Master in Physics, The University of Rennes I  

  • 1998.09
    -
    2000.07

    College in Chemistry, University of Rennes I  

Research Experience 【 display / non-display

  • 2018.04
    -
    Now

    Waseda University   School of Science and Engineering   Associate Professor (seconded employee from the University of Orleans in France)

  • 2007.09
    -
    2018.03

    University of Orleans   Department of physics   Associate Professor (Permanent)

  • 2015.04
    -
    2015.09

    Fukuoka Institute of Technology   JSPS visiting researcher

  • 2013.04
    -
    2013.09

    Waseda University   Canon Foundation visiting researcher

  • 2010.08
    -
    2010.09

    Waseda University   JSPS visting researcher

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Research Areas 【 display / non-display

  • Environmental load and risk assessment

  • Biophysics, chemical physics and soft matter physics

  • Organic functional materials

Research Interests 【 display / non-display

  • Mesoporous materials

  • confinement effects

  • Colloidal in state materials

  • Liquid crystals

  • Layered Materials

Papers 【 display / non-display

  • A kaolinite-tetrabutylphosphonium bromide intercalation compound as an effective intermediate for intercalation of bulky organophosphonium salts

    Shingo Machida, Régis Guégan, Yoshiyuki Sugahara

    Applied Clay Science   206   106038 - 106038  2021.06

    DOI

  • Performance evaluation of organoclays for the amoxicillin retention in a dynamic context

    Régis Guégan, Lydie Le Forestier

    Chemical Engineering Journal   406   126859 - 126859  2021.02  [Refereed]

    DOI

  • A novel approach to characterization of a relatively unstable intercalation compound under ambient conditions: revisiting a kaolinite-acetone intercalation compound

    Shingo Machida, Régis Guégan, Yoshiyuki Sugahara

    Dalton Transactions    2021

     View Summary

    <p>Characteristics of a kaolinite-acetone intercalation compound prepared using a kaolinite N-methylformamide intercalation compound (Kaol-NMF) as an intermediate were obtained by a set of techniques with attention to suppressing evaporation and...</p>

    DOI

  • Removal of methylene blue from aqueous solutions using a solid residue of the apple juice industry: Full factorial design, equilibrium, thermodynamics and kinetics aspects

    L.R. Bonetto, J.S. Crespo, R. Guégan, V.I. Esteves, M. Giovanela

    Journal of Molecular Structure   1224   129296 - 129296  2021.01  [Refereed]

    DOI

  • Loss of a membrane phase under soft confinement conditions imposed by a porous silica colloids network

    Miho Tanimura, Yoshiyuki Sugahara, Régis Guégan

    Colloids and Surfaces A: Physicochemical and Engineering Aspects   608   125554 - 125554  2021.01  [Refereed]

    DOI

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Specific Research 【 display / non-display

  • Preparation of hydrogels with nanosheets as immobilization matrixes for yeasts

    2020  

     View Summary

    Hydrogels based on triblock co-polymers made by pluronicF127 display interesting properties: biocompatibility, gelation at roomtemperature for a possible use as embedding matrixes for bio-organisms, andfurther developments of biosensors. The inclusion of nanosheets, derivativesfrom the peeling of layered materials can give further properties(birefringence due to the anisotropy of the 2D shape particles, enhancement ofthe elastic properties) to the hybrid hydrogels. The association of clay mineralsand their organoclay derivatives in hydrogel formed with F127 and its impactson the gelation mechanisms as well as the elastic properties were investigated.The presence of hydrophobic nanosheets spreads out the gelation on a largerange of temperature, while conferring to the hybrid materials further advancedelastic properties.@font-face {font-family:"MS Mincho"; panose-1:2 2 6 9 4 2 5 8 3 4; mso-font-alt:"MS 明朝"; mso-font-charset:128; mso-generic-font-family:modern; mso-font-pitch:fixed; mso-font-signature:-536870145 1791491579 134217746 0 131231 0;}@font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;}@font-face {font-family:"\@MS Mincho"; panose-1:2 2 6 9 4 2 5 8 3 4; mso-font-charset:128; mso-generic-font-family:modern; mso-font-pitch:fixed; mso-font-signature:-536870145 1791491579 134217746 0 131231 0;}p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman",serif; mso-fareast-font-family:"Times New Roman";}p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph {mso-style-priority:34; mso-style-unhide:no; mso-style-qformat:yes; margin-top:0cm; margin-right:0cm; margin-bottom:0cm; margin-left:42.0pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:0cm; mso-para-margin-left:4.0gd; text-align:justify; text-justify:inter-ideograph; mso-pagination:none; font-size:12.0pt; mso-bidi-font-size:11.0pt; font-family:"Times New Roman",serif; mso-fareast-font-family:"MS Mincho"; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt; mso-ansi-language:EN-US;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-family:"Calibri",sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Yu Mincho"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}div.WordSection1 {page:WordSection1;}

  • Preparation of hydrogels with nanosheets as immobilization matrixes for yeasts

    2020  

     View Summary

    Hydrogels based on triblock co-polymers made by pluronicF127 display interesting properties: biocompatibility, gelation at roomtemperature for a possible use as embedding matrixes for bio-organisms, andfurther developments of biosensors. The inclusion of nanosheets, derivativesfrom the peeling of layered materials can give further properties(birefringence due to the anisotropy of the 2D shape particles, enhancement ofthe elastic properties) to the hybrid hydrogels. The association of grapheneoxides in hydrogel formed with F127 and its impacts on the gelation mechanismsas well as the elastic properties were investigated. The presence of largeinorganic particles spreads out the gelation on a large range of temperature,while conferring to the hybrid materials further elastic properties.@font-face {font-family:"MS Mincho"; panose-1:2 2 6 9 4 2 5 8 3 4; mso-font-alt:"MS 明朝"; mso-font-charset:128; mso-generic-font-family:modern; mso-font-pitch:fixed; mso-font-signature:-536870145 1791491579 134217746 0 131231 0;}@font-face {font-family:Century; panose-1:2 4 6 4 5 5 5 2 3 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:647 0 0 0 159 0;}@font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;}@font-face {font-family:"\@MS Mincho"; panose-1:2 2 6 9 4 2 5 8 3 4; mso-font-charset:128; mso-generic-font-family:modern; mso-font-pitch:fixed; mso-font-signature:-536870145 1791491579 134217746 0 131231 0;}p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; text-align:justify; text-justify:inter-ideograph; mso-pagination:none; font-size:11.0pt; mso-bidi-font-size:10.0pt; font-family:"Century",serif; mso-fareast-font-family:"MS Mincho"; mso-bidi-font-family:"Times New Roman"; mso-font-kerning:1.0pt; mso-ansi-language:EN-US;}p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph {mso-style-priority:34; mso-style-unhide:no; mso-style-qformat:yes; margin-top:0cm; margin-right:0cm; margin-bottom:0cm; margin-left:42.0pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:0cm; mso-para-margin-left:4.0gd; text-align:justify; text-justify:inter-ideograph; mso-pagination:none; font-size:12.0pt; mso-bidi-font-size:11.0pt; font-family:"Times New Roman",serif; mso-fareast-font-family:"MS Mincho"; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt; mso-ansi-language:EN-US;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-family:"Calibri",sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Yu Mincho"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}div.WordSection1 {page:WordSection1;}

  • Hierarchical assemblies based on liquid crystal mixtures of graphene oxides and nonionic surfactants

    2019  

     View Summary

    Nanosheets resulting from the peeling of inorganic layered materials can form, at low concentration in an appropriate solvent, liquid crystalline (LC) assemblies (such as nematic or lamellar phases for instance) as organic moieties do. These materials can be used as building blocks for further anisotropy and template systems to orientate other colloidal systems such as assemblies made of surfactants where synergetic effects can be expected. Thus, the colloidal mixtures resulting from a delicate balance of both repulsive and attractive forces (excluded volume, electrostatic and Van der Waals forces show interesting hierarchical assemblies that can lead to the preparation of advanced materials.

  • Novel nanostructures by mixing inorganic nanosheets and nonionic surfactants membrane as a new way to synthesize porous materials

    2018   SUGAHARA Yoshiyuki

     View Summary

    Two dimensional (2D) atomic crystals or nanosheets resulting from the peeling of inorganic layered materials represent exciting nanomaterials with fascinating properties and diverse potential applications for constructing novel nanomaterials. The stability of the association of dispersion of nanosheets with other colloidal objects such as organic moieties results from a fragile energy landscape with the possibility of phase segregation, and thus the study of such mixtures represents a certain challenge. Beyond the academic interests about the understanding of the stability of these colloids in solution, the association of particles associated with membrane phases made of surfactants, lipids and other apparent biological systems that can mimic cell envelope, may lead to novel microstructures that can be oriented at a macroscopic scale through the assistance of inorganic nanosheets leading to the possibility to fabricate hierarchical oriented composite films for various applications depending on the architectures of the whole colloidal objects.

 

Syllabus 【 display / non-display

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