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Bart Jan Ravoo - One of the best experts on this subject based on the ideXlab platform.
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Preparation of Microscale Polymer Janus Particles by Sandwich Microcontact Printing
Macromolecular Chemistry and Physics, 2016Co-Authors: Philipp Seidel, Bart Jan RavooAbstract:andwich Microcontact printing provides a straightforward way to obtain Janus polymer particles by postfunctionalization. In this paper, the synthesis of poly(glycidylmethacrylate-co-divinylbenzene) [poly(GMA-co-DVB)] particles with a diameter below 3 μm by precipitation polymerization with narrow size distribution and GMA content up to 70% is presented. Infrared spectra show the increasing GMA content of the particles. Successful functionalization of Janus particles with A-B, A-B-A, and A-B-C structure by sandwich Microcontact printing is demonstrated by printing low-molecular-weight fluorescent inks such as dansylcadaverine and rhodamine onto the particles in well-defined and homogeneous patches. Under optimized conditions, Janus particles with a diameter of 2 μm are accessible in a single printing step.
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One-step synthesis of patterned polymer brushes by photocatalytic Microcontact printing
Chemical Communications, 2015Co-Authors: Friederike Kettling, Benjamin Vonhören, Jennifer A. Krings, Susumu Saito, Bart Jan RavooAbstract:A novel method to prepare microstructured polymer brushes using TiO2 nanoparticles and photocatalytic Microcontact printing is described. It is shown that ethanol amine can be polymerized to linear polyethyleneimine (PEI) driven by the photocatalytic action of TiO2. Upon UV irradiation during Microcontact printing of ethanol amine with a stamp coated with TiO2 nanoparticles, patterned polymer brushes with a length of around 50 nm are obtained.
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surface patterning by Microcontact chemistry
Langmuir, 2012Co-Authors: Christian Wendeln, Bart Jan RavooAbstract:In this Feature Article we describe recent progress in covalent surface patterning by Microcontact chemistry. Microcontact chemistry is a variation of Microcontact printing based on the transfer of reactive “ink” molecules from a microstructured, elastomeric stamp onto surfaces modified with complementary reactive groups, leading to a chemical reaction in the area of contact. In comparison with other lithographic methods, Microcontact chemistry has a number of advantageous properties including very short patterning times, low consumption of ink molecules, high resolution and large area patterning. During the past 5 years we and many others have investigated a set of different reactions that allow the modification of flat and also spherical surfaces in an effective way. Especially click-type reactions were found to be versatile for substrate patterning by Microcontact chemistry and were applied for chemical modification of reactive self-assembled monolayers and polymer surfaces. Microcontact chemistry has ...
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Bifunctional Janus beads made by "sandwich" Microcontact printing using click chemistry
Journal of Materials Chemistry, 2012Co-Authors: Tobias Kaufmann, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Filip Du Prez, Bart Jan RavooAbstract:This article describes the preparation of spherical Janus particles by Microcontact printing. A set of three different polymer beads (diameter ca. 170 μm), each bearing different functional groups at their surface, are used to covalently attach distinct functional molecules exclusively on opposing poles of the beads. The covalent modification of the beads involves three different types of click chemistry: epoxide ring opening (ERO), copper catalysed azide-alkyne cycloaddition (CuAAC) and thiol-yne addition (TYA). These reactions are compared with regard to their advantages and disadvantages in the context of "sandwich" Microcontact chemistry. The success of surface modification of the beads is verified by fluorescence microscopy and 3D-time of flight secondary ion mass spectrometry measurements and is further supported by reference experiments on planar surfaces bearing the same surface functionality and analysed by X-ray photoelectron spectroscopy, secondary ion mass spectrometry, atomic force microscopy and fluorescence microscopy. Furthermore we demonstrate that sandwich Microcontact printing can also be performed on smaller polymer beads with a diameter of ca. 5 μm. The broad scope of surface chemistry in combination with the simple experimental setup makes this method attractive to a wide range of material science applications, since it combines orthogonality of surface functionalization with high pattern fidelity. This journal is © The Royal Society of Chemistry 2012.
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"Sandwich" Microcontact printing as a mild route towards monodisperse Janus particles with tailored bifunctionality
Advanced Materials, 2011Co-Authors: Tobias Kaufmann, Christian Wendeln, Martin Schneiders, S. A.f. Bon, Filip E. Du Prez, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Bart Jan RavooAbstract:A “sandwich” Microcontact printing method is reported. A monolayer of porous epoxy polymer microspheres is transformed into Janus particles with distinct functionality on each face by reaction with amine functional fluorescent dyes, carbohydrates, and magnetic nanoparticles.
Tobias Kaufmann - One of the best experts on this subject based on the ideXlab platform.
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Bifunctional Janus beads made by "sandwich" Microcontact printing using click chemistry
Journal of Materials Chemistry, 2012Co-Authors: Tobias Kaufmann, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Filip Du Prez, Bart Jan RavooAbstract:This article describes the preparation of spherical Janus particles by Microcontact printing. A set of three different polymer beads (diameter ca. 170 μm), each bearing different functional groups at their surface, are used to covalently attach distinct functional molecules exclusively on opposing poles of the beads. The covalent modification of the beads involves three different types of click chemistry: epoxide ring opening (ERO), copper catalysed azide-alkyne cycloaddition (CuAAC) and thiol-yne addition (TYA). These reactions are compared with regard to their advantages and disadvantages in the context of "sandwich" Microcontact chemistry. The success of surface modification of the beads is verified by fluorescence microscopy and 3D-time of flight secondary ion mass spectrometry measurements and is further supported by reference experiments on planar surfaces bearing the same surface functionality and analysed by X-ray photoelectron spectroscopy, secondary ion mass spectrometry, atomic force microscopy and fluorescence microscopy. Furthermore we demonstrate that sandwich Microcontact printing can also be performed on smaller polymer beads with a diameter of ca. 5 μm. The broad scope of surface chemistry in combination with the simple experimental setup makes this method attractive to a wide range of material science applications, since it combines orthogonality of surface functionalization with high pattern fidelity. This journal is © The Royal Society of Chemistry 2012.
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"Sandwich" Microcontact printing as a mild route towards monodisperse Janus particles with tailored bifunctionality
Advanced Materials, 2011Co-Authors: Tobias Kaufmann, Christian Wendeln, Martin Schneiders, S. A.f. Bon, Filip E. Du Prez, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Bart Jan RavooAbstract:A “sandwich” Microcontact printing method is reported. A monolayer of porous epoxy polymer microspheres is transformed into Janus particles with distinct functionality on each face by reaction with amine functional fluorescent dyes, carbohydrates, and magnetic nanoparticles.
Christian Wendeln - One of the best experts on this subject based on the ideXlab platform.
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surface patterning by Microcontact chemistry
Langmuir, 2012Co-Authors: Christian Wendeln, Bart Jan RavooAbstract:In this Feature Article we describe recent progress in covalent surface patterning by Microcontact chemistry. Microcontact chemistry is a variation of Microcontact printing based on the transfer of reactive “ink” molecules from a microstructured, elastomeric stamp onto surfaces modified with complementary reactive groups, leading to a chemical reaction in the area of contact. In comparison with other lithographic methods, Microcontact chemistry has a number of advantageous properties including very short patterning times, low consumption of ink molecules, high resolution and large area patterning. During the past 5 years we and many others have investigated a set of different reactions that allow the modification of flat and also spherical surfaces in an effective way. Especially click-type reactions were found to be versatile for substrate patterning by Microcontact chemistry and were applied for chemical modification of reactive self-assembled monolayers and polymer surfaces. Microcontact chemistry has ...
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"Sandwich" Microcontact printing as a mild route towards monodisperse Janus particles with tailored bifunctionality
Advanced Materials, 2011Co-Authors: Tobias Kaufmann, Christian Wendeln, Martin Schneiders, S. A.f. Bon, Filip E. Du Prez, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Bart Jan RavooAbstract:A “sandwich” Microcontact printing method is reported. A monolayer of porous epoxy polymer microspheres is transformed into Janus particles with distinct functionality on each face by reaction with amine functional fluorescent dyes, carbohydrates, and magnetic nanoparticles.
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photochemical Microcontact printing by thiol ene and thiol yne click chemistry
Langmuir, 2010Co-Authors: Christian Wendeln, Stefan Rinnen, Heinrich F. Arlinghaus, Christian Schulz, Bart Jan RavooAbstract:This article describes the microstructured immobilization of functional thiols on alkene- and alkyne-terminated self-assembled monolayers on silicon oxide substrates by photochemical Microcontact printing. A photochemical thiol−ene or thiol−yne “click” reaction was locally induced in the area of contact between stamp and substrate by irradiation with UV light (365 nm). The immobilization reaction by photochemical Microcontact printing was verified by contact angle measurements, X-ray photoelectron spectroscopy, atomic force microscopy, and time-of-flight secondary ion mass spectrometry. The reaction rate of photochemical Microcontact printing by thiol−ene chemistry was studied using time dependent contact angle measurements. The selective binding of lectins to galactoside microarrays prepared by photochemical Microcontact printing was also demonstrated. It was found that photochemical Microcontact printing results in a high surface coverage of functional thiols within 30 s of printing even for dilute (mM)...
Stefan Rinnen - One of the best experts on this subject based on the ideXlab platform.
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Bifunctional Janus beads made by "sandwich" Microcontact printing using click chemistry
Journal of Materials Chemistry, 2012Co-Authors: Tobias Kaufmann, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Filip Du Prez, Bart Jan RavooAbstract:This article describes the preparation of spherical Janus particles by Microcontact printing. A set of three different polymer beads (diameter ca. 170 μm), each bearing different functional groups at their surface, are used to covalently attach distinct functional molecules exclusively on opposing poles of the beads. The covalent modification of the beads involves three different types of click chemistry: epoxide ring opening (ERO), copper catalysed azide-alkyne cycloaddition (CuAAC) and thiol-yne addition (TYA). These reactions are compared with regard to their advantages and disadvantages in the context of "sandwich" Microcontact chemistry. The success of surface modification of the beads is verified by fluorescence microscopy and 3D-time of flight secondary ion mass spectrometry measurements and is further supported by reference experiments on planar surfaces bearing the same surface functionality and analysed by X-ray photoelectron spectroscopy, secondary ion mass spectrometry, atomic force microscopy and fluorescence microscopy. Furthermore we demonstrate that sandwich Microcontact printing can also be performed on smaller polymer beads with a diameter of ca. 5 μm. The broad scope of surface chemistry in combination with the simple experimental setup makes this method attractive to a wide range of material science applications, since it combines orthogonality of surface functionalization with high pattern fidelity. This journal is © The Royal Society of Chemistry 2012.
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"Sandwich" Microcontact printing as a mild route towards monodisperse Janus particles with tailored bifunctionality
Advanced Materials, 2011Co-Authors: Tobias Kaufmann, Christian Wendeln, Martin Schneiders, S. A.f. Bon, Filip E. Du Prez, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Bart Jan RavooAbstract:A “sandwich” Microcontact printing method is reported. A monolayer of porous epoxy polymer microspheres is transformed into Janus particles with distinct functionality on each face by reaction with amine functional fluorescent dyes, carbohydrates, and magnetic nanoparticles.
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photochemical Microcontact printing by thiol ene and thiol yne click chemistry
Langmuir, 2010Co-Authors: Christian Wendeln, Stefan Rinnen, Heinrich F. Arlinghaus, Christian Schulz, Bart Jan RavooAbstract:This article describes the microstructured immobilization of functional thiols on alkene- and alkyne-terminated self-assembled monolayers on silicon oxide substrates by photochemical Microcontact printing. A photochemical thiol−ene or thiol−yne “click” reaction was locally induced in the area of contact between stamp and substrate by irradiation with UV light (365 nm). The immobilization reaction by photochemical Microcontact printing was verified by contact angle measurements, X-ray photoelectron spectroscopy, atomic force microscopy, and time-of-flight secondary ion mass spectrometry. The reaction rate of photochemical Microcontact printing by thiol−ene chemistry was studied using time dependent contact angle measurements. The selective binding of lectins to galactoside microarrays prepared by photochemical Microcontact printing was also demonstrated. It was found that photochemical Microcontact printing results in a high surface coverage of functional thiols within 30 s of printing even for dilute (mM)...
Heinrich F. Arlinghaus - One of the best experts on this subject based on the ideXlab platform.
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Bifunctional Janus beads made by "sandwich" Microcontact printing using click chemistry
Journal of Materials Chemistry, 2012Co-Authors: Tobias Kaufmann, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Filip Du Prez, Bart Jan RavooAbstract:This article describes the preparation of spherical Janus particles by Microcontact printing. A set of three different polymer beads (diameter ca. 170 μm), each bearing different functional groups at their surface, are used to covalently attach distinct functional molecules exclusively on opposing poles of the beads. The covalent modification of the beads involves three different types of click chemistry: epoxide ring opening (ERO), copper catalysed azide-alkyne cycloaddition (CuAAC) and thiol-yne addition (TYA). These reactions are compared with regard to their advantages and disadvantages in the context of "sandwich" Microcontact chemistry. The success of surface modification of the beads is verified by fluorescence microscopy and 3D-time of flight secondary ion mass spectrometry measurements and is further supported by reference experiments on planar surfaces bearing the same surface functionality and analysed by X-ray photoelectron spectroscopy, secondary ion mass spectrometry, atomic force microscopy and fluorescence microscopy. Furthermore we demonstrate that sandwich Microcontact printing can also be performed on smaller polymer beads with a diameter of ca. 5 μm. The broad scope of surface chemistry in combination with the simple experimental setup makes this method attractive to a wide range of material science applications, since it combines orthogonality of surface functionalization with high pattern fidelity. This journal is © The Royal Society of Chemistry 2012.
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"Sandwich" Microcontact printing as a mild route towards monodisperse Janus particles with tailored bifunctionality
Advanced Materials, 2011Co-Authors: Tobias Kaufmann, Christian Wendeln, Martin Schneiders, S. A.f. Bon, Filip E. Du Prez, M. Talha Gokmen, Stefan Rinnen, Heinrich F. Arlinghaus, Bart Jan RavooAbstract:A “sandwich” Microcontact printing method is reported. A monolayer of porous epoxy polymer microspheres is transformed into Janus particles with distinct functionality on each face by reaction with amine functional fluorescent dyes, carbohydrates, and magnetic nanoparticles.
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photochemical Microcontact printing by thiol ene and thiol yne click chemistry
Langmuir, 2010Co-Authors: Christian Wendeln, Stefan Rinnen, Heinrich F. Arlinghaus, Christian Schulz, Bart Jan RavooAbstract:This article describes the microstructured immobilization of functional thiols on alkene- and alkyne-terminated self-assembled monolayers on silicon oxide substrates by photochemical Microcontact printing. A photochemical thiol−ene or thiol−yne “click” reaction was locally induced in the area of contact between stamp and substrate by irradiation with UV light (365 nm). The immobilization reaction by photochemical Microcontact printing was verified by contact angle measurements, X-ray photoelectron spectroscopy, atomic force microscopy, and time-of-flight secondary ion mass spectrometry. The reaction rate of photochemical Microcontact printing by thiol−ene chemistry was studied using time dependent contact angle measurements. The selective binding of lectins to galactoside microarrays prepared by photochemical Microcontact printing was also demonstrated. It was found that photochemical Microcontact printing results in a high surface coverage of functional thiols within 30 s of printing even for dilute (mM)...