Search

Your search keyword '"Sommerdijk, Nico A. J. M."' showing total 585 results
Start Over Author "Sommerdijk, Nico A. J. M."
585 results on '"Sommerdijk, Nico A. J. M."'

55. Combinatorial Evolution of Biomimetic Magnetite Nanoparticles

Author

Lenders, Jos J. M., primary, Bawazer, Lukmaan A., additional, Green, David C., additional, Zope, Harshal R., additional, Bomans, Paul H. H., additional, de With, Gijsbertus, additional, Kros, Alexander, additional, Meldrum, Fiona C., additional, and Sommerdijk, Nico A. J. M., additional

Published
2017
Full Text
View/download PDF

56. Photocatalytic activity of exfoliated graphite–TiO2 nanoparticle composites.

Author

Guidetti, Gloria, Pogna, Eva A. A., Lombardi, Lucia, Tomarchio, Flavia, Polishchuk, Iryna, Joosten, Rick R. M., Ianiro, Alessandro, Soavi, Giancarlo, Sommerdijk, Nico A. J. M., Friedrich, Heiner, Pokroy, Boaz, Ott, Anna K., Goisis, Marco, Zerbetto, Francesco, Falini, Giuseppe, Calvaresi, Matteo, Ferrari, Andrea C., Cerullo, Giulio, and Montalti, Marco

Published
2019
Full Text
View/download PDF

64. Microscopic structure of the polymer-induced liquid precursor for calcium carbonate.

Author

Yifei Xu, Tijssen, Koen C. H., Bomans, Paul H. H., Akiva, Anat, Friedrich, Heiner, Kentgens, Arno P. M., and Sommerdijk, Nico A. J. M.

Abstract

Many biomineral crystals form complex non-equilibrium shapes, often via transient amorphous precursors. Also in vitro crystals can be grown with non-equilibrium morphologies, such as thin films or nanorods. In many cases this involves charged polymeric additives that form a polymer-induced liquid precursor (PILP). Here, we investigate the CaCO3 based PILP process with a variety of techniques including cryoTEM and NMR. The initial products are 30-50 nm amorphous calcium carbonate (ACC) nanoparticles with ~2 nm nanoparticulate texture. We show the polymers strongly interact with ACC in the early stages, and become excluded during crystallization, with no liquid-liquid phase separation detected during the process. Our results suggest that "PILP" is actually a polymer-driven assembly of ACC clusters, and that its liquid-like behavior at the macroscopic level is due to the small size and surface properties of the assemblies. We propose that a similar biopolymer-stabilized nanogranular phase may be active in biomineralization. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

66. A roadmap for poly(ethylene oxide)- block-poly-ε-caprolactone self-assembly in water: Prediction, synthesis, and characterization.

Author

Ianiro, Alessandro, Patterson, Joseph, González García, Álvaro, van Rijt, Mark M. J., Hendrix, Marco M. R. M., Sommerdijk, Nico A. J. M., Voets, Ilja K., Esteves, A. Catarina C., and Tuinier, Remco

Subjects
POLYETHYLENE oxide, CAPROLACTONES, MOLECULAR self-assembly, SUPRAMOLECULES, BLOCK copolymers
Abstract

ABSTRACT Numerical self-consistent field (SCF) lattice computations allow a priori determination of the equilibrium morphology and size of supramolecular structures originating from the self-assembly of neutral block copolymers in selective solvents. The self-assembly behavior of poly(ethylene oxide)- block-poly-ε-caprolactone (PEO-PCL) block copolymers in water was studied as a function of the block composition, resulting in equilibrium structure and size diagrams. Guided by the theoretical SCF predictions, PEO-PCL block copolymers of various compositions have been synthesized and assembled in water. The size and morphology of the resulting structures have been characterized by small-angle X-ray scattering, cryogenic transmission electron microscopy, and multiangle dynamic light scattering. The experimental results are consistent with the SCF computations. These findings show that SCF is applicable to build up roadmaps for amphiphilic polymers in solution, where control over size and shape are required, which is relevant, for instance, when designing spherical micelles for drug delivery systems © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 330-339 [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

78. Design and self-assembly of simple coat proteins for artificial viruses

Author

Physical and Colloid Chemistry, Condensed Matter Theory, Statistical and Computational Physics, Sub Cell Biology, Sub Physical and Colloid Chemistry, Sub Algemeen Theoretical Physics, Hernandez-Garcia, Armando, Kraft, Daniela J., Janssen, Anne F J, Bomans, Paul H H, Sommerdijk, Nico A J M, Thies - Weesie, Dominique, Favretto, Marco E., Brock, Roland, de Wolf, Frits A., Werten, Marc W T, van der Schoot, Paul, Stuart, Martien Cohen, de Vries, Renko, Physical and Colloid Chemistry, Condensed Matter Theory, Statistical and Computational Physics, Sub Cell Biology, Sub Physical and Colloid Chemistry, Sub Algemeen Theoretical Physics, Hernandez-Garcia, Armando, Kraft, Daniela J., Janssen, Anne F J, Bomans, Paul H H, Sommerdijk, Nico A J M, Thies - Weesie, Dominique, Favretto, Marco E., Brock, Roland, de Wolf, Frits A., Werten, Marc W T, van der Schoot, Paul, Stuart, Martien Cohen, and de Vries, Renko

Published
2014

79. Enzymatic pH control for biomimetic deposition of calcium phosphate coatings

Author

Nijhuis, Arnold W. G., Nijhuis, Arnold W. G., Nejadnik, M. Reza, Nudelman, Fabio, Walboomers, X. Frank, te Riet, Joost, Habibovic, Pamela, Birgani, Zeinab Tahmasebi, Li Yubao, Bomans, Paul H. H., Jansen, John A., Sommerdijk, Nico A. J. M., Leeuwenburgh, Sander C. G., Nijhuis, Arnold W. G., Nijhuis, Arnold W. G., Nejadnik, M. Reza, Nudelman, Fabio, Walboomers, X. Frank, te Riet, Joost, Habibovic, Pamela, Birgani, Zeinab Tahmasebi, Li Yubao, Bomans, Paul H. H., Jansen, John A., Sommerdijk, Nico A. J. M., and Leeuwenburgh, Sander C. G.

Abstract

The current study examines the enzymatic decomposition of urea into carbon dioxide and ammonia as a means to increase the pH during biomimetic deposition of calcium phosphate (CaP) onto implant surfaces. The kinetics of the enzymatically induced pH increase were studied by monitoring pH, calcium concentration and conductivity of the aqueous solutions as a function of time, urease concentration and initial concentrations of calcium and phosphate ions. Cryogenic transmission electron microscopy was used to study the process of homogeneous CaP precipitation in solution, whereas CaP deposition on conventional acid-etched titanium and micropatterned polystyrene (PS) surfaces was studied using scanning electron microscopy. The data presented in this study confirm that the substrate-enzyme combination urea-urease offers strong control over the rate of pH increase by varying the concentrations of precursor salts and urease. Formation of biomimetic CaP coatings was shown to proceed via formation of ionic polymeric assemblies of prenucleation complexes. The process of deposition and corresponding coating morphology was strongly dependent on the concentration of calcium, phosphate and urease. Finally, it was shown that the substrate-enzyme combination urea-urease allowed for spatial distribution of CaP crystals along the grooves of micropatterned PS surfaces at low concentrations of calcium, phosphate and urease, stressing the sensitivity of the presented method. Acta Materialia Inc.

Published
2014

81. The bis-urea motif as a tool to functionalize self-assembled nanoribbons

Author

Vos, Matthijn R. J., Jardl, Gorka Etxebarria, Pallas, Anna Llanes, Frederick, Peter M., Breurken, Monica, Leclere, Phillip E.L.G., Asselen, Otto L. J. van, Bomans, Paul H. H., Nolte, Roeland J. M., and Sommerdijk, Nico A. J. M.

Subjects
Urea -- Chemical properties, Urea -- Atomic properties, Surface active agents -- Chemical properties, Surface active agents -- Atomic properties, Ammonium chloride -- Chemical properties, Ammonium chloride -- Atomic properties, Ammonium compounds -- Chemical properties, Ammonium compounds -- Atomic properties, Ammonium paratungstate -- Chemical properties, Ammonium paratungstate -- Atomic properties, Hydrogen bonding -- Structure, Chemistry
Abstract

The new bis-ureido surfactant reported, organizes into well-defined ribbon-like aggregates directed by strong hydrogen bonding is demonstrated. The anchoring of different functionalities in a modular approach proved to be using the molecular recognition capabilities of the bis-ureido moiety, opening possibilities to a wide range of applications.

Published
2005

82. Kinetics of avidin-induced clearance of biotinylated bimodal liposomes for improved MR molecular imaging

Author

van Tilborg, Geralda A. F., Strijkers, Gustav J., Pouget, Emilie M., Reutelingsperger, Chris P. M., Sommerdijk, Nico A. J. M., Nicolay, Klaas, Mulder, Willem J. M., Other departments, and Medical Biochemistry

Abstract

Dual labeled liposomes, carrying both paramagnetic and fluorescent lipids, were recently proposed as potent contrast agents for MR molecular imaging. These nanoparticles are coated with poly(ethylene glycol) (PEG) to increase their blood circulation half-life, which should allow extensive accumulation at the targeted site. To eliminate nonspecific blood pool signal from the MR images, the circulating liposomes should ideally be cleared from the circulation when sufficient target-specific contrast enhancement is obtained. To that aim, we designed an avidin chase that allowed controlled and rapid clearance of paramagnetic biotinylated liposomes from the blood circulation in C57BL/6 mice. Avidin-induced alterations in blood clearance kinetics and tissue distribution were studied quantitatively by determination of the Gd content in blood and tissue samples ex vivo. Intrinsic liposomal blood clearance showed bi-exponential behavior with half-lives t(1/2alpha) = 2.1 +/- 1.1 and t(1/2beta) = 15.1 +/- 5.4 hours, respectively. In contrast, the contrast agent was cleared from the blood by the avidin infusion to

Published
2008

83. A classical view on nonclassical nucleation.

Author

Laven, Jozua, Friedrich, Heiner, Sommerdijk, Nico A. J. M., Smeets, Paul J. M., Habraken, Wouter J. E. M., Nudelman, Fabio, De Yoreo, James J., Rodger, P. Mark, and Finney, Aaron R.

Subjects
CALCIUM carbonate, NUCLEATION, CRYSTAL growth, ELECTRON cryomicroscopy, MOLECULAR dynamics
Abstract

Understanding and controlling nucleation is important for many crystallization applications. Calcium carbonate (CaCO3) is often used as a model system to investigate nucleation mechanisms. Despite its great importance in geology, biology, and many industrial applications, CaCO3 nucleation is still a topic of intense discussion, with new pathways for its growth from ions in solution proposed in recent years. These new pathways include the so-called nonclassical nucleation mechanism via the assembly of thermodynamically stable prenucleation clusters, as well as the formation of a dense liquid precursor phase via liquid-liquid phase separation. Here, we present results from a combined experimental and computational investigation on the precipitation of CaCO3 in dilute aqueous solutions. We propose that a dense liquid phase (containing 4-7 H2O per CaCO3 unit) forms in supersaturated solutions through the association of ions and ion pairs without significant participation of larger ion clusters. This liquid acts as the precursor for the formation of solid CaCO3 in the form of vaterite, which grows via a net transfer of ions from solution according to z Ca2+ + z CO32- → z CaCO3. The results show that all steps in this process can be explained according to classical concepts of crystal nucleation and growth, and that long-standing physical concepts of nucleation can describe multistep, multiphase growth mechanisms. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

84. Surface induced selective delamination of amphiphilic ABA block copolymer thin films

Author

Popescu, Daniela C., Rossi, Nicholas A. A., Yeoh, Chert-Tsun, Durand, Geraldine G, Wouters, D., Leclere, P.E.L.G., Thune, P., Holder, Simon J., and Sommerdijk, Nico A. J. M.

Subjects
QD
Abstract

This is the result of an ongoing collaboration with Dr. N. Sommerdijk’s Biomaterials group at the University of Eindhoven (the Netherlands) and illustrates the close collaboration that exists in pursuing the design and application of novel polymeric materials between the two groups. This details work on a physical phenomenon (selective delamination) and key materials (amphiphilic block copolymers) that have subsequently been applied in the design of novel biomaterials. These results have appeared in a larger body of work including Advanced Materials, Angewandtie Chemie International Edition and the Journal of Materials Chemistry.

Published
2004

89. Erratum: Corrigendum: Directed assembly of optoelectronically active alkyl–π-conjugated molecules by adding n-alkanes or π-conjugated species

Author

Hollamby, Martin J., primary, Karny, Maciej, additional, Bomans, Paul H. H., additional, Sommerdijk, Nico A. J. M., additional, Saeki, Akinori, additional, Seki, Shu, additional, Minamikawa, Hiroyuki, additional, Grillo, Isabelle, additional, Pauw, Brian R., additional, Brown, Paul, additional, Eastoe, Julian, additional, Möhwald, Helmuth, additional, and Nakanishi, Takashi, additional

Published
2014
Full Text
View/download PDF

94. Nucleation and Growth of Monodisperse Silica Nanoparticles

Author

Carcouët, Camille C. M. C., primary, van de Put, Marcel W. P., additional, Mezari, Brahim, additional, Magusin, Pieter C. M. M., additional, Laven, Jozua, additional, Bomans, Paul H. H., additional, Friedrich, Heiner, additional, Esteves, A. Catarina C., additional, Sommerdijk, Nico A. J. M., additional, van Benthem, Rolf A. T. M., additional, and de With, Gijsbertus, additional

Published
2014
Full Text
View/download PDF

98. A triptycene based approach for solubilizing carbon-nanotubes and C60

Author

Hammershøj, Peter, Bomans, Paul H.H., Lakshminayaranan, Rajamani, Fock, Jeppe, Jensen, Stig Helmer, Jespersen, Thomas Sand, Brock-Nannestad, Theis, Hassenkam, Tue, Nygård, Jesper, Sommerdijk, Nico A. J. M., Kilså, Kristine, Bjørnholm, Thomas, Christensen, Jørn Bolstad, Hammershøj, Peter, Bomans, Paul H.H., Lakshminayaranan, Rajamani, Fock, Jeppe, Jensen, Stig Helmer, Jespersen, Thomas Sand, Brock-Nannestad, Theis, Hassenkam, Tue, Nygård, Jesper, Sommerdijk, Nico A. J. M., Kilså, Kristine, Bjørnholm, Thomas, and Christensen, Jørn Bolstad

Published
2012

Catalog

Books, media, physical & digital resources
See catalog results