Moritz Buhl

University of Münster

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Bart Jan Ravoo

University of Münster

Martin Körsgen

University of Münster

Heinrich F. Arlinghaus

University of Münster

Sebastian Lamping

University of Münster

Jaume Veciana

Institut de Ciència de Materials de Barcelona

Elena Marchante

Institut de Ciència de Materials de Barcelona

Marta Mas‐Torrent

Institut de Ciència de Materials de Barcelona

Núria Crivillers

Institut de Ciència de Materials de Barcelona

Ulrich Kynast

FH Münster

Matthias Tesch

University of Münster

Cooperative Institutions

University of Münster

Analytisches Laboratorium

Institut de Ciència de Materials de Barcelona

Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine

Center for NanoScience

Universitat Autònoma de Barcelona

Centre for Research on Ecology and Forestry Applications

Delft University of Technology

FH Münster

Advanced Optical Technologies (United States)

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An Electrically Driven and Readable Molecular Monolayer Switch Based on a Solid Electrolyte

Angewandte Chemie (2015)

Elena Marchante Núria Crivillers Moritz Buhl Jaume Veciana Marta Mas‐Torrent

Abstract The potential application of molecular switches as active elements in information storage has been demonstrated through numerous works. Importantly, such switching capabilities have also been reported for self‐assembled monolayers (SAMs). SAMs of electroactive molecules have recently been exploited as electrochemical switches. Typically, the state of these switches could be read out through their optical and/or magnetic response. These output reading processes are difficult to integrate into devices, and furthermore, there is a need to use liquid environments for switching the redox‐active molecular systems. In this work, both of these challenges were overcome by using an ionic gel as the electrolyte medium, which led to an unprecedented solid‐state device based on a single molecular layer. Moreover, electrochemical impedance has been successfully exploited as the output of the system.

Molecular switch

Self-assembled monolayer

Molecular Electronics

10.1002/ange.201508449

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Citations (13)

Preparation of Functional Alternating Polymer Brushes and Their Orthogonal Surface Modification through Microcontact Printing

Chemistry - A European Journal (2016)

Moritz Buhl Matthias Tesch Sebastian Lamping Johanna Moratz Armido Studer

Abstract This paper reports microcontact printing (μCP) to immobilize an alkoxyamine initiator (regulator) on glass and silicon substrates and subsequent surface‐initiated alternating nitroxide‐mediated copolymerization (siNMP) of hexafluoroisopropyl acrylate (HFIPA) and 7‐octenylvinyl ether (OVE). The resulting patterned polymer brushes are analyzed by using atomic force microscopy (AFM). In addition, site‐specific post‐functionalization of the alternating polymer brushes by applying two orthogonal surface reactions is achieved with thiols and amines through μCP. The versatility of this post‐polymerization modification approach is demonstrated by site‐selective immobilization of small organic molecules, fluorophores, and ligands providing a binary bioactive surface. The successful side‐by‐side orthogonal immobilization is verified by using X‐ray photoelectron spectroscopy (XPS) and fluorescence microscopy.

Microcontact Printing

Surface Modification

Polymer brush

10.1002/chem.201603565

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An Electrically Driven and Readable Molecular Monolayer Switch Based on a Solid Electrolyte

Angewandte Chemie International Edition (2015)

Elena Marchante Núria Crivillers Moritz Buhl Jaume Veciana Marta Mas‐Torrent

10.1002/anie.201508449

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Citations (24)

Patterning of Nanoclays on Positively Charged Self-Assembled Monolayers via Micromolding in Capillaries

Langmuir (2017)

Moritz Buhl Mark C. Staniford Sebastian Lamping Martin Körsgen Heinrich F. Arlinghaus

Nanoclays are nanomaterials with versatile adsorptive properties. This contribution describes the generation of micropatterns of a nanoclay ("laponite") on ammonium-terminated, self-assembled monolayers (SAMs) on glass and silicon. Microstructured immobilization of the laponite was performed using micromolding in capillaries (MIMIC). The immobilization was verified using contact angle goniometry, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron microscopy (SEM), time-of-flight secondary ion mass spectrometry (ToF-SIMS), and fluorescence microscopy. Furthermore, laponite was modified with Nile red to generate a fluorescence enhancement-based surface sensor for the vitamin choline.

10.1021/acs.langmuir.6b04618

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On surface O-glycosylation by catalytic microcontact printing

Chemical Communications (2017)

Moritz Buhl Serena Traboni Martin Körsgen Sebastian Lamping Heinrich F. Arlinghaus

Carbohydrate microarrays are made by microcontact printing of glycosyl donors on hydroxyl terminated substrates.

Microcontact Printing

10.1039/c7cc02505j

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Development of a Knudsen-type matrix coater for sample preparation for mass spectrometry imaging

Biointerphases (2018)

Martin Körsgen Bonnie J. Tyler Marcel Heeger Moritz Buhl Heinrich F. Arlinghaus

The use of time-of-flight secondary ion mass spectrometry (SIMS) is of increasing interest for biological and medical applications due to its ability to provide chemical information on a submicrometer scale. However, the detection of larger biomolecules such as phospholipids and peptides is often inhibited by high fragmentation rates and low ionization efficiencies. One way to increase the secondary ion molecular yield is to chemically modify the surface using the matrix-enhanced SIMS approach, where an organic matrix is placed upon the surface. In this study, a Knudsen cell type matrix coater was developed in order to produce well-defined thicknesses of a matrix on a sample in order to study the effect of these matrix layers on the secondary ions. Using this technique, an order of magnitude enhancement of the useful ion yield for lipids was observed and clear enhancement of image contrast for lipids in brain tissue was demonstrated. The study shows that the layer thickness has a great influence on the emission of secondary ions, and therefore, its precise control is important for optimal yield enhancement.

Biomolecule

Matrix (chemical analysis)

Mass spectrometry imaging

Fragmentation

Sample Preparation

10.1116/1.5019247

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Immobilization of Enzymes via Microcontact Printing and Thiol–Ene Click Chemistry

Bioconjugate Chemistry (2015)

Moritz Buhl Benjamin Vonhören Bart Jan Ravoo

This Communication describes a bioconjugation method for the generation of enzyme microarrays on surfaces using photochemical thiol–ene chemistry in combination with microcontact printing. Glucose oxidase and lactase were readily immobilized (i.e., printing time 2 min) on alkene terminated self-assembled monolayers on glass as demonstrated by X-ray photoelectron spectroscopy and fluorescence microscopy. Furthermore, the activity of both immobilized enzymes was confirmed in single enzyme as well as cascade transformations.

Microcontact Printing

Thiol

Ene reaction

10.1021/acs.bioconjchem.5b00282

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Citations (44)