G. Julius Vancsó

University of Twente

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Mark A. Hempenius

University of Twente

194

Holger Schönherr

University of Siegen

190

Nikodem Tomczak

Agency for Science, Technology and Research

David N. Reinhoudt

University of Twente

Jurriaan Huskens

University of Twente

Peter Schön

Norwegian University of Science and Technology

Edmondo M. Benetti

University of Padua

Joost Duvigneau

University of Twente

Xueling Feng

Donghua University

Rob G. H. Lammertink

University of Twente

Cooperative Institutions

University of Twente

358

Institute of Polymers

Eindhoven University of Technology

Centre National de la Recherche Scientifique

University of Toronto

Agency for Science, Technology and Research

Institute of Nanotechnology

École Polytechnique Fédérale de Lausanne

ETH Zurich

Institute of Materials Research and Engineering

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Poly(ferrocenyldimethylsilanes) for Reactive Ion Etch Barrier Applications

Chemistry of Materials (2001)

Rob G. H. Lammertink Mark A. Hempenius Vanessa Z.-H. Chan Edwin L. Thomas G. Julius Vancsó

The behavior of poly(ferrocenyldimethylsilane) (PFS) under reactive ion etching conditions was investigated. Due to the presence of iron and silicon in the main chain, the polymer was found to be relatively stable toward oxygen plasma etching compared to common organic polymers. Depending on the conditions employed, the etching rate ratio for poly(isoprene) vs poly(ferrocenyldimethylsilane) ranged from 20:1 to 50:1. During etching, a thin iron- and silicon-containing oxide layer was formed at the surface of the organometallic polymer. The oxide layer was characterized by X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) using depth profiling. Iron was found to be more resistant toward removal by oxygen plasma compared to silicon. Iron in the polymer also makes it resistive to CF4/O2 etching. A regular pattern consisting of parallel lines of PFS on a solid substrate was obtained by micromolding in capillaries (MIMIC) (a microcontact printing technique), which could be transferred into the underlying substrate. Under the conditions employed, silicon and silicon nitride substrates were etched at approximately 20 nm/min, whereas no thickness decrease was observed for the poly(ferrocenyldimethylsilane) film, even after etching times exceeding 10 min.

Silicon oxide

Auger electron spectroscopy

10.1021/cm001052q

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Citations (108)

Flame treatment of low-density polyethylene: Surface chemistry across the length scales

Applied Surface Science (2007)

Jing Song Ullrich Gunst Heinrich F. Arlinghaus G. Julius Vancsó

Low-density polyethylene

Chemical state

10.1016/j.apsusc.2007.06.018

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Citations (46)

Efficient and robust coatings using poly(2‐methyl‐2‐oxazoline) and its copolymers for marine and bacterial fouling prevention

Journal of Polymer Science Part A Polymer Chemistry (2015)

Tao He Dominik Jańczewski Satyasankar Jana Anbanandam Parthiban Shifeng Guo

ABSTRACT Molecular design, fabrication, and properties of thin‐film coatings based on poly(2‐methyl‐2‐oxazoline) (PMOX) and its copolymers were investigated to tackle problem of marine and bacterial fouling prevention. The ultraviolet crosslinkable macromonomer poly(2‐methyl‐2‐oxazoline) dimethylacrylate was synthesized by cationic ring‐opening polymerization in a microwave reactor initiated by 1,4‐dibromobutane. In order to study the charge effect of the PMOX coatings on the adhesion of fouling organisms, PMOX surfaces with negative, neutral, and positive ζ‐potential values were prepared by copolymerization with the positively charged monomer [2‐(methacryloyloxy)‐ethyl]trimethylammonium chloride. The coatings were stable in sea water for at least 1 month without significant reduction in the film thickness. The marine antifouling activity was evaluated against barnacle cyprids Amphibalanus amphitrite and algae Amphora coffeaeformis . Results showed that PMOX coatings provide effective reduction of the settlement regardless of the molar mass and surface charge of the polymer. Bacterial adhesion test showed that PMOX coatings effectively reduce Staphylococcus aureus and Escherichia coli adhesion. Owing to its good stability and antifouling activity PMOX has a great potential as antifouling coating for marine antifouling applications. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 275–283

Biofouling

Cationic polymerization

Macromonomer

10.1002/pola.27912

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Citations (45)

Insertion of Individual Dendrimer Molecules into Self-Assembled Monolayers on Gold: A Mechanistic Study

Langmuir (2000)

Arianna Friggeri Holger Schönherr Henk‐Jan van Manen Bart‐Hendrik Huisman G. Julius Vancsó

The insertion process of individual dendrimer sulfide 1 molecules into self-assembled monolayers (SAMs) of 11-mercapto-1-undecanol has been investigated by atomic force microscopy (AFM), wettability, and electrochemical measurements.Immersion of 11-mercapto-1-undecanol SAMs in solutions of increasing concentrations of 1 leads to an increase in the number of dendrimer molecules inserted into the thiol layer.Similarly, longer contact times of the original SAM with the solvent (dichloromethane) also lead to a higher number of inserted dendrimers.However, 11-mercapto-1-undecanol monolayers prepared by immersion into 1 mM solutions of the thiol for 2, 5, 10, 30, 60, 120, and 180 min, followed by a 60 min exposure to a solution of dendrimer 1 did not show significant differences in the number of inserted dendrimers.This indicates that the initial layer quality is not a determining factor for the insertion process.A mechanism consisting of rapid dissociation of surface thiols, possibly as disulfides, followed by slow dendrimer adsorption, is proposed.The rate-determining step of the process is the insertion of the individual dendrimer molecules.For the dissociation step, first-order kinetics for the fraction of covered substrate versus time of exposure to solvent was found, with a rate constant, k, of (8.0 ( 1.5) × 10 -4 min -1 .

Self-assembled monolayer

10.1021/la000529+

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Citations (35)

Surface Grafted, Single-Chain Macromolecular Motors from Redox Responsive, "Smart" Poly(ferrocenylsilanes)

G. Julius Vancsó Shan Zou Mark A. Hempenius Yujie Ma Holger Schönherr

Chain (unit)

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Morphology control of organometallic domains in phase‐separated poly(styrene‐block‐ferrocenyldimethylsilanes)

Journal of Polymer Science Part A Polymer Chemistry (1998)

Rob G. H. Lammertink Dennis J. Versteeg Mark A. Hempenius G. Julius Vancsó

Morphology

10.1002/(sici)1099-0518(19980915)36:12<2147::aid-pola21>3.3.co;2-#

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Templated Self‐Assembly of Block Copolymers: Effect of Substrate Topography

Advanced Materials (2003)

Jay Cheng C. A. Ross Edwin L. Thomas Henry I. Smith G. Julius Vancsó

Topographical confinement is used to template the formation of nanoscale domains in a self‐assembled block copolymer film. The topographical template controls the row spacings and feature dimensions of the copolymer and can deliberately introduce defects in the arrays (see Figure). For example, a sharp edge feature leads to a missing domain and pins the lateral position of the polymer array. (See also inside cover.)

Position (finance)

Feature (linguistics)

Template

10.1002/adma.200305244

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Citations (229)

Surface energy and stiffness discrete gradients in additive manufactured scaffolds for osteochondral regeneration

Biofabrication (2016)

Andrea Di Luca Alessia Longoni Giuseppe Criscenti Ivan Lorenzo‐Moldero Michel Klein‐Gunnewiek

Swift progress in biofabrication technologies has enabled unprecedented advances in the application of developmental biology design criteria in three-dimensional scaffolds for regenerative medicine. Considering that tissues and organs in the human body develop following specific physico-chemical gradients, in this study, we hypothesized that additive manufacturing (AM) technologies would significantly aid in the construction of 3D scaffolds encompassing such gradients. Specifically, we considered surface energy and stiffness gradients and analyzed their effect on adult bone marrow derived mesenchymal stem cell differentiation into skeletal lineages. Discrete step-wise macroscopic gradients were obtained by sequentially depositing different biodegradable biomaterials in the AM process, namely poly(lactic acid) (PLA), polycaprolactone (PCL), and poly(ethylene oxide terephthalate)/poly(butylene terephthalate) (PEOT/PBT) copolymers. At the bulk level, PEOT/PBT homogeneous scaffolds supported a higher alkaline phosphatase (ALP) activity compared to PCL, PLA, and gradient scaffolds, respectively. All homogeneous biomaterial scaffolds supported also a significantly higher amount of glycosaminoglycans (GAGs) production compared to discrete gradient scaffolds. Interestingly, the analysis of the different material compartments revealed a specific contribution of PCL, PLA, and PEOT/PBT to surface energy gradients. Whereas PEOT/PBT regions were associated to significantly higher ALP activity, PLA regions correlated with significantly higher GAG production. These results show that cell activity could be influenced by the specific spatial distribution of different biomaterial chemistries in a 3D scaffold and that engineering surface energy discrete gradients could be considered as an appealing criterion to design scaffolds for osteochondral regeneration.

Biomaterial

Polycaprolactone

Regenerative Medicine

10.1088/1758-5090/8/1/015014

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Citations (60)

Grafting of Single, Stimuli-Responsive Poly(ferrocenylsilane) Polymer chains to Gold Surfaces

Shan Zou Yue Ma Mark A. Hempenius Holger Schönherr G. Julius Vancsó

Source

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Beaded Electrospun Fibers for Photonic Applications

Macromolecules (2005)

Nikodem Tomczak N.F. van Hulst G. Julius Vancsó

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTBeaded Electrospun Fibers for Photonic ApplicationsNikodem Tomczak, Niek F. van Hulst, and G. Julius VancsoView Author Information Materials Science and Technology of Polymers and Applied Optics group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands Cite this: Macromolecules 2005, 38, 18, 7863–7866Publication Date (Web):August 4, 2005Publication History Received23 May 2005Revised26 June 2005Published online4 August 2005Published inissue 1 September 2005https://pubs.acs.org/doi/10.1021/ma051049yhttps://doi.org/10.1021/ma051049ybrief-reportACS PublicationsCopyright © 2005 American Chemical SocietyRequest reuse permissionsArticle Views733Altmetric-Citations57LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Chromophores,Fibers,Fluorescence,Molecules,Organic compounds Get e-Alerts

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10.1021/ma051049y

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Citations (59)