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Aissou K, Mumtaz M, Alvarez-Fernandez A, Mercat J, Antoine S, Pécastaings G, Ponsinet V, Dobrzynski C, Fleury G, Hadziioannou G. Metallic Nanodot Patterns with Unique Symmetries Templated from ABC Triblock Terpolymer Networks. Macromol Rapid Commun 2018; 39:e1700754. [DOI: 10.1002/marc.201700754] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 12/14/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Karim Aissou
- Laboratoire de Chimie des Polymères Organiques (LCPO); CNRS - ENSCPB - Université de Bordeaux; 16 Avenue Pey-Berland F-33607 Pessac Cedex France
| | - Muhammad Mumtaz
- Laboratoire de Chimie des Polymères Organiques (LCPO); CNRS - ENSCPB - Université de Bordeaux; 16 Avenue Pey-Berland F-33607 Pessac Cedex France
| | - Alberto Alvarez-Fernandez
- Laboratoire de Chimie des Polymères Organiques (LCPO); CNRS - ENSCPB - Université de Bordeaux; 16 Avenue Pey-Berland F-33607 Pessac Cedex France
- Centre de Recherche Paul Pascal (CRPP); CNRS UPR 8641; Université de Bordeaux; 115 Avenue Schweitzer F-33600 Pessac France
| | - Jean Mercat
- Laboratoire de Chimie des Polymères Organiques (LCPO); CNRS - ENSCPB - Université de Bordeaux; 16 Avenue Pey-Berland F-33607 Pessac Cedex France
- Bordeaux INP; IMB; UMR 5251/Inria Bordeaux Sud-Ouest; Team Cardamom; F-33405 Talence Cedex France
| | - Ségolène Antoine
- Laboratoire de Chimie des Polymères Organiques (LCPO); CNRS - ENSCPB - Université de Bordeaux; 16 Avenue Pey-Berland F-33607 Pessac Cedex France
| | - Gilles Pécastaings
- Laboratoire de Chimie des Polymères Organiques (LCPO); CNRS - ENSCPB - Université de Bordeaux; 16 Avenue Pey-Berland F-33607 Pessac Cedex France
| | - Virginie Ponsinet
- Centre de Recherche Paul Pascal (CRPP); CNRS UPR 8641; Université de Bordeaux; 115 Avenue Schweitzer F-33600 Pessac France
| | - Cécile Dobrzynski
- Bordeaux INP; IMB; UMR 5251/Inria Bordeaux Sud-Ouest; Team Cardamom; F-33405 Talence Cedex France
| | - Guillaume Fleury
- Laboratoire de Chimie des Polymères Organiques (LCPO); CNRS - ENSCPB - Université de Bordeaux; 16 Avenue Pey-Berland F-33607 Pessac Cedex France
| | - Georges Hadziioannou
- Laboratoire de Chimie des Polymères Organiques (LCPO); CNRS - ENSCPB - Université de Bordeaux; 16 Avenue Pey-Berland F-33607 Pessac Cedex France
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Moyen E, Hama A, Ismailova E, Assaud L, Malliaras G, Hanbücken M, Owens RM. Nanostructured conducting polymers for stiffness controlled cell adhesion. NANOTECHNOLOGY 2016; 27:074001. [PMID: 26790487 DOI: 10.1088/0957-4484/27/7/074001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
UNLABELLED We propose a facile and reproducible method, based on ultra thin porous alumina membranes, to produce cm(2) ordered arrays of nano-pores and nano-pillars on any kind of substrates. In particular our method enables the fabrication of conducting polymers nano-structures, such as poly[3,4-ethylenedioxythiophene]:poly[styrene sulfonate] ( PEDOT PSS). Here, we demonstrate the potential interest of those templates with controlled cell adhesion studies. The triggering of the eventual fate of the cell (proliferation, death, differentiation or migration) is mediated through chemical cues from the adsorbed proteins and physical cues such as surface energy, stiffness and topography. Interestingly, as well as through material properties, stiffness modifications can be induced by nano-topography, the ability of nano-pillars to bend defining an effective stiffness. By controlling the diameter, length, depth and material of the nano-structures, one can possibly tune the effective stiffness of a (nano) structured substrate. First results indicate a possible change in the fate of living cells on such nano-patterned devices, whether they are made of conducting polymer (soft material) or silicon (hard material).
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Affiliation(s)
- Eric Moyen
- Centre Microélectronique de Provence, Department of Bioelectronics, Ecole Nationale Supérieure des Mines de Saint Etienne, 880 route de Mimet, F-13541 Gardanne, France. CNRS-Aix-Marseille University, CINaM, F-13288 Marseille, France
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Wesche M, Hüske M, Yakushenko A, Brüggemann D, Mayer D, Offenhäusser A, Wolfrum B. A nanoporous alumina microelectrode array for functional cell-chip coupling. NANOTECHNOLOGY 2012; 23:495303. [PMID: 23150042 DOI: 10.1088/0957-4484/23/49/495303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The design of electrode interfaces has a strong impact on cell-based bioelectronic applications. We present a new type of microelectrode array chip featuring a nanoporous alumina interface. The chip is fabricated in a combination of top-down and bottom-up processes using state-of-the-art clean room technology and self-assembled generation of nanopores by aluminum anodization. The electrode characteristics are investigated in phosphate buffered saline as well as under cell culture conditions. We show that the modified microelectrodes exhibit decreased impedance compared to planar microelectrodes, which is caused by a nanostructuring effect of the underlying gold during anodization. The stability and biocompatibility of the device are demonstrated by measuring action potentials from cardiomyocyte-like cells growing on top of the chip. Cross sections of the cell-surface interface reveal that the cell membrane seals the nanoporous alumina layer without bending into the sub-50 nm apertures. The nanoporous microelectrode array device may be used as a platform for combining extracellular recording of cell activity with stimulating topographical cues.
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Affiliation(s)
- Manuel Wesche
- Institute of Bioelectronics (PGI-8/ICS-8) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, D-52425 Jülich, Germany
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Moyen E, Santinacci L, Masson L, Wulfhekel W, Hanbücken M. A novel self-ordered sub-10 nm nanopore template for nanotechnology. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:5094-8, 5018. [PMID: 22718558 DOI: 10.1002/adma.201200648] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 05/14/2012] [Indexed: 05/23/2023]
Affiliation(s)
- Eric Moyen
- CNRS, UMR 7325, 13288, Marseille, France, Aix-Marseille Univ., CINaM, 13288, Marseille, France.
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Lo Schiavo V, Robert P, Limozin L, Bongrand P. Quantitative modeling assesses the contribution of bond strengthening, rebinding and force sharing to the avidity of biomolecule interactions. PLoS One 2012; 7:e44070. [PMID: 23024747 PMCID: PMC3443103 DOI: 10.1371/journal.pone.0044070] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 07/30/2012] [Indexed: 12/23/2022] Open
Abstract
Cell adhesion is mediated by numerous membrane receptors. It is desirable to derive the outcome of a cell-surface encounter from the molecular properties of interacting receptors and ligands. However, conventional parameters such as affinity or kinetic constants are often insufficient to account for receptor efficiency. Avidity is a qualitative concept frequently used to describe biomolecule interactions: this includes incompletely defined properties such as the capacity to form multivalent attachments. The aim of this study is to produce a working description of monovalent attachments formed by a model system, then to measure and interpret the behavior of divalent attachments under force. We investigated attachments between antibody-coated microspheres and surfaces coated with sparse monomeric or dimeric ligands. When bonds were subjected to a pulling force, they exhibited both a force-dependent dissociation consistent with Bell’s empirical formula and a force- and time-dependent strengthening well described by a single parameter. Divalent attachments were stronger and less dependent on forces than monovalent ones. The proportion of divalent attachments resisting a force of 30 piconewtons for at least 5 s was 3.7 fold higher than that of monovalent attachments. Quantitative modeling showed that this required rebinding, i.e. additional bond formation between surfaces linked by divalent receptors forming only one bond. Further, experimental data were compatible with but did not require stress sharing between bonds within divalent attachments. Thus many ligand-receptor interactions do not behave as single-step reactions in the millisecond to second timescale. Rather, they exhibit progressive stabilization. This explains the high efficiency of multimerized or clustered receptors even when bonds are only subjected to moderate forces. Our approach provides a quantitative way of relating binding avidity to measurable parameters including bond maturation, rebinding and force sharing, provided these parameters have been determined. Also, this provides a quantitative description of the phenomenon of bond strengthening.
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Affiliation(s)
- Valentina Lo Schiavo
- Aix-Marseille Université, LAI, Marseille, France
- Inserm UMR 1067, LAI, Marseille France
- CNRS UMR 7333, LAI, Marseille, France
| | - Philippe Robert
- Aix-Marseille Université, LAI, Marseille, France
- Inserm UMR 1067, LAI, Marseille France
- CNRS UMR 7333, LAI, Marseille, France
- Assistance Publique - Hôpitaux de Marseille (APHM), Hôpital de la Conception, Marseille, France
| | - Laurent Limozin
- Aix-Marseille Université, LAI, Marseille, France
- Inserm UMR 1067, LAI, Marseille France
- CNRS UMR 7333, LAI, Marseille, France
| | - Pierre Bongrand
- Aix-Marseille Université, LAI, Marseille, France
- Inserm UMR 1067, LAI, Marseille France
- CNRS UMR 7333, LAI, Marseille, France
- Assistance Publique - Hôpitaux de Marseille (APHM), Hôpital de la Conception, Marseille, France
- * E-mail:
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Ivanova EP, Hasan J, Webb HK, Truong VK, Watson GS, Watson JA, Baulin VA, Pogodin S, Wang JY, Tobin MJ, Löbbe C, Crawford RJ. Natural bactericidal surfaces: mechanical rupture of Pseudomonas aeruginosa cells by cicada wings. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:2489-94. [PMID: 22674670 DOI: 10.1002/smll.201200528] [Citation(s) in RCA: 483] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Indexed: 05/22/2023]
Abstract
Natural superhydrophobic surfaces are often thought to have antibiofouling potential due to their self-cleaning properties. However, when incubated on cicada wings, Pseudomonas aeruginosa cells are not repelled; instead they are penetrated by the nanopillar arrays present on the wing surface, resulting in bacterial cell death. Cicada wings are effective antibacterial, as opposed to antibiofouling, surfaces.
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Affiliation(s)
- Elena P Ivanova
- Faculty of Life and Social Sciences, Swinburne University of Technology, P.O. Box 218, Hawthorn, 3122, Australia.
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Li J, Zhou C, Jin X, Piao W, Gao X. Controlled nanoscale diffusion-limited chemical etching for releasing polystyrene nanocones from recyclable alumina templates. Chem Commun (Camb) 2012; 48:11322-4. [DOI: 10.1039/c2cc35463b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jung M, El-Said WA, Choi JW. Fabrication of gold nanodot arrays on a transparent substrate as a nanobioplatform for label-free visualization of living cells. NANOTECHNOLOGY 2011; 22:235304. [PMID: 21483042 DOI: 10.1088/0957-4484/22/23/235304] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Two-dimensional gold (Au) nanodot arrays on a transparent substrate were fabricated for imaging of living cells. A nanoporous alumina mask with large-area coverage capability was prepared by a two-step chemical wet etching process after a second anodization. Highly ordered Au nanodot arrays were formed on indium-tin-oxide (ITO) glass using very thin nanoporous alumina of approximately 200 nm thickness as an evaporation mask. The large-area Au nanodot arrays on ITO glass were modified with RGD peptide (arginine; glycine; aspartic acid) containing a cysteine (Cys) residue and then used to immobilize human cancer HeLa cells, the morphology of which was observed by confocal microscopy. The confocal micrographs of living HeLa cells on Au nanodot arrays revealed enhanced contrast and resolution, which enabled discernment of cytoplasmic organelles more clearly. These results suggest that two-dimensional Au nanodot arrays modified with RGD peptide on ITO glass have potential as a biocompatible nanobioplatform for the label-free visualization and adhesion of living cells.
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Affiliation(s)
- Mi Jung
- Interdisciplinary Program of Integrated Biotechnology, Sogang University, Seoul, Korea
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Bhattacharya J, Kisner A, Offenhäusser A, Wolfrum B. Microfluidic anodization of aluminum films for the fabrication of nanoporous lipid bilayer support structures. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2011; 2:104-109. [PMID: 21977420 PMCID: PMC3148057 DOI: 10.3762/bjnano.2.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 02/04/2011] [Indexed: 05/31/2023]
Abstract
Solid state nanoporous membranes show great potential as support structures for biointerfaces. In this paper, we present a technique for fabricating nanoporous alumina membranes under constant-flow conditions in a microfluidic environment. This approach allows the direct integration of the fabrication process into a microfluidic setup for performing biological experiments without the need to transfer the brittle nanoporous material. We demonstrate this technique by using the same microfluidic system for membrane fabrication and subsequent liposome fusion onto the nanoporous support structure. The resulting bilayer formation is monitored by impedance spectroscopy across the nanoporous alumina membrane in real-time. Our approach offers a simple and efficient methodology to investigate the activity of transmembrane proteins or ion diffusion across membrane bilayers.
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Affiliation(s)
- Jaydeep Bhattacharya
- Peter Grünberg Institute, PGI-8/ICS-8, Forschungszentrum Jülich GmbH, Leo-Brandt-Str., 52425 Jülich, Germany and Jülich - Aachen Research Alliance (JARA - FIT), Germany
| | - Alexandre Kisner
- Peter Grünberg Institute, PGI-8/ICS-8, Forschungszentrum Jülich GmbH, Leo-Brandt-Str., 52425 Jülich, Germany and Jülich - Aachen Research Alliance (JARA - FIT), Germany
| | - Andreas Offenhäusser
- Peter Grünberg Institute, PGI-8/ICS-8, Forschungszentrum Jülich GmbH, Leo-Brandt-Str., 52425 Jülich, Germany and Jülich - Aachen Research Alliance (JARA - FIT), Germany
| | - Bernhard Wolfrum
- Peter Grünberg Institute, PGI-8/ICS-8, Forschungszentrum Jülich GmbH, Leo-Brandt-Str., 52425 Jülich, Germany and Jülich - Aachen Research Alliance (JARA - FIT), Germany
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Lei Y, Yang S, Wu M, Wilde G. Surface patterning using templates: concept, properties and device applications. Chem Soc Rev 2011; 40:1247-58. [DOI: 10.1039/b924854b] [Citation(s) in RCA: 170] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Novel anodic aluminum oxide-based nanofabrication: applications in physics and biology. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Limozin L, Sengupta K. Quantitative reflection interference contrast microscopy (RICM) in soft matter and cell adhesion. Chemphyschem 2010; 10:2752-68. [PMID: 19816893 DOI: 10.1002/cphc.200900601] [Citation(s) in RCA: 146] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Adhesion can be quantified by measuring the distance between the interacting surfaces. Reflection interference contrast microscopy (RICM), with its ability to measure inter-surface distances under water with nanometric precision and milliseconds time resolution, is ideally suited to studying the dynamics of adhesion in soft systems. Recent technical developments, which include innovative image analysis and the use of multi-coloured illumination, have led to renewed interest in this technique. Unambiguous quantitative measurements have been achieved for colloidal beads and model membranes, thus revealing new insights and applications. Quantification of data from cells shows exciting prospects. Herein, we review the basic principles and recent developments of RICM applied to studies of dynamical adhesion processes in soft matter and cell biology and provide practical hints to potential users.
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Affiliation(s)
- Laurent Limozin
- Adhesion and Inflammation, CNRS UMR 6212, Inserm U600, Aix-Marseille University, Luminy, Marseille, France.
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