Publications: Material science

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Real-Time Protein and Cell Binding Measurements on Hydroxyapatite Coatings

Publication year: 2016
Authors: A. M. Vilardell 1 , N. Cinca 1 , A. Jokinen 2, N. Garcia-Giralt 3, S. Dosta 1, I. G. Cano 1 and J. M. Guilemany 1
Published in: Journal of Functional Biomaterials, 2016, Vol. 7(3), p. 23
Although a lot of in vitro and in vivo assays have been performed during the last few decades years for hydroxyapatite bioactive coatings, there is a lack of exploitation of real-time in vitro interaction measurements. In the present work, real-time interactions for a plasma sprayed hydroxyapatite coating were measured by a Multi-Parametric Surface Plasmon Resonance (MP-SPR), [...]

Enzymes as Biodevelopers for Nano- And Micropatterned Bicomponent Biopolymer Thin Films

Publication year: 2016
Authors: Niegelhell K. 1, Süßenbacher M. 1, Jammernegg K. 1, Ganner T. 2, Schwendenwein D. 3, Schwab H. 3, Stelzer F. 1, Plank H. 2, Spirk S. 1,4
Published in: Biomacromolecules, 2016, Vol. 17 (11), p. 3743–3749
The creation of nano- and micropatterned polymer films is a crucial step for innumerous applications in science and technology. However, there are several problems associated with environmental aspects concerning the polymer synthesis itself, cross-linkers to induce the patterns as well as toxic solvents [...]

Topography effects in AFM force mapping experiments on xylan-decorated cellulose thin films

Publication year: 2016
Authors: Ganser Ch. 1,2,3, Niegelhell K. 4, Czibula C. 1,3, Chemelli A. 5, Teichert Ch. 1,3, Schennach R. 3,6, Spirk S. 4,7
Published in: International Journal of the Biology, Chemistry, Physics and Technology of Woo
Xylan-coated cellulose thin films has been investigated by means of atomic force microscopy (AFM) and force mapping experiments. The birch xylan deposition on the film was performed under control [...]

Surface plasmon resonance for characterization of large-area atomic-layer graphene film

Publication year: 2016
Authors: H. Jussila 1,*, H. Yang 1, N. Granqvist 2, Z. Sun 1
Published in: Optica, Vol. 3, Issue 2, p. 151-158
Characterization of large-area thin films with atomic-scale resolution is challenging but in great demand for diverse applications (e.g., nanotechnology and sensing). Here, we use the Surface Plasmon Resonance (SPR) method to characterize both the thickness and refractive index of chemical-vapor-deposition (CVD)-grown graphene films. [...]

Determining Number Concentrations and Diameters of Polystyrene Particles by Measuring the Effective Refractive Index of Colloids Using Surface Plasmon Resonance

Publication year: 2016
Authors: Tuoriniemi J. 1, Moreira B. 1, Safina G. 1,2
Published in: Langmuir, 2016, Vol. 32 (41), p. 10632–10640
The capabilities of surface plasmon resonance (SPR) for characterization of colloidal particles were evaluated for 100, 300, and 460 nm nominal diameter polystyrene (PS) latexes. First the accuracy of measuring [...]

Using electrochemical surface plasmon resonance for in-situ kinetic investigations of solid electrolyte interphase formation in lithium ion battery

Publication year: 2016
Authors: Pradanawati S.A. a, Wang F.-M. a, b, Su Ch.-H. c
Published in: Journal of Power Sources, Vol. 330, 2016, p. 127–131
The solid electrolyte interphase (SEI) significantly affects the energy density and safety performance of lithium ion batteries. Previous studies have shown that conventional analyses cannot characterize the real-time [...]

Interactions between Cellulolytic Enzymes with Native, Autohydrolysis, and Technical Lignins and the Effect of a Polysorbate Amphiphile in Reducing Nonproductive Binding

Publication year: 2015
Authors: Fritz C. 1, Ferrer A. 1, Salas C. 1, Jameel H. 1, Rojas O.J. 1,2
Published in: Biomacromolecules, 2015, Vol. 16(12), p. 3878-88
Understanding enzyme-substrate interactions is critical in designing strategies for bioconversion of lignocellulosic biomass. In this study we monitored molecular events, in situ and in real time, including the adsorption and desorption of cellulolytic enzymes on lignins and cellulose, by using quartz crystal microgravimetry and surface plasmon resonance. [...]

Supramolecular Surface Chemistry: Substrate-Independent, Phosphate-Driven Growth of Polyamine-Based Multifunctional Thin Films

Publication year: 2015
Authors: Waldemar A. Marmisollé1, Joseba Irigoyen2, Danijela Gregurec2, Sergio Moya2 and Omar Azzaroni1*
Published in: Advanced Functional Materials, Vol. 25, I. 26, p. 4144–4152
The ability to engineer surfaces at the supramolecular level by controlled integration of specific chemical units through substrate-independent methodologies represents one of the new paradigms [...]

Reversible Switching of Redox-Active Molecular Orbitals and Electron Transfer Pathways in CuA Sites of Cytochrome c Oxidase

Publication year: 2015
Authors: Ulises Zitare, Damián Alvarez Paggi, Marcos N.Morgada, Luciano A.Abriata, Alejadro J.Vila, Daniel H.Murgida
Published in: Angewandte Chemie International Edition (Impact Factor: 11.26). 06/2015; 54(33)
The CuA site of cytochrome c oxidase is a redox hub that participates in rapid electron transfer at low driving forces with two redox cofactors in nearly perpendicular orientations. Spectroscopic and electrochemical characterizations [...]

Effects of charge ratios of xylan-poly(allylamine hydrochloride) complexes on their adsorption onto different surfaces

Publication year: 2015
Authors: Galván MV1,Soledad Peresin M2, Mocchiutti P1, Granqvist N3, Zanuttini MA1, Tammelin T2
Published in: Cellulose, 2015, 22 [5], p. 2955-2970
The adsorption behavior of polyelectrolyte complexes (PECs) of poly(allylamine hydrochloride) (PAH) and 4-O-methylglucuronoxylan (Xyl) onto silica surface, cellulose nanofibrils (CNFs) model surfaces, and unbleached softwood kraft fibers was studied. Different charge ratios and ionic strengths of the liquid medium (q − /q +: 0.3, 0.5 and 0.8 in 1 mM NaCl, and q − /q +: 0.2, 0.3 and 0.5 in 10 mM NaCl), at pH 7.5 were considered. [...]

Lysozyme adsorption at a silica surface using simulation and experiment: effects of pH on protein layer structure

Publication year: 2015
Authors: Karina Kubiak-Ossowska a, Monika Cwieka b, Agnieszka Kaczynska c, Barbara Jachimska b and Paul A. Mulheran, *a
Published in: Phys. Chem. Chem. Phys., 2015,17, p. 24070-24077
Hen Egg White Lysozyme (HEWL) is a widely used exemplar to study protein adsorption on surfaces and interfaces. Here we use fully atomistic Molecular Dynamics (MD) simulations, Multi-Parametric Surface Plasmon Resonance (MP-SPR), contact angle and zeta potential measurements to study [...]

Degradable Polymer with Protein Resistance in a Marine Environment

Publication year: 2015
Authors: Ma J1, Ma C*1, and Zhang G*1,2
Published in: Langmuir, 2015, Vol. 31 [23], p. 6471–6478
Protein resistance is the central issue in marine antibiofouling. We have prepared poly(ε-caprolactone) (PCL)-based polyurethane with 2-(dimethylamino) ethyl methacrylate (DEM) as pendant groups [...]

Chelating Surfaces for Native State Proteins Patterning: The Human Serum Albumin Case

Publication year: 2015
Authors: Giamblanco N., Tuccitto N., Zappalà G., Sfuncia G., Licciardello A., Marletta G.
Published in: ACS Applied Materials & Interfaces, 2015, Vol. 7 (41), p. 23353–23363
The paper reports a new “soft” surface functionalization strategy, based on a highly selective ion metal chelation process. The proposed stepwise methodology implies at first the construction of a monolayer of terpyridine-based thiol (Tpy), whose highly packed [...]

Adsorption and lubricating properties of HFBII hydrophobins and diblock copolymer poly(methyl methacrylate-b-sodium acrylate) additives in water-lubricated copper vs. a-C:H contacts

Publication year: 2015
Authors: Hakala TJ1, Metsäjoki J1, Granqvist N2, Milani R1, Szilvay GR1, Elomaa O3, Deng M4, Zhang J4, Li F3
Published in: Tribology International, Volume 90, October 2015, Pages 60–66
In a metal forming process the adhesion between the workpiece and the tool needs to be minimised, which can be achieved by use of lubricants and coatings. [...]

pH-responsive ion transport in polyelectrolyte multilayers of poly(diallyldimethylammonium chloride) (PDADMAC) and poly(4-styrenesulfonic acid-co-maleic acid) (PSS-MA) bearing strong- and weak anionic groups

Publication year: 2015
Authors: Maza E. a, Tuninetti J.S. a, Politakos N. b, Knoll W. c, Moya S. b, Azzaroni O. *a
Published in: Physical Chemistry Chemical Physics, 2015,Vol. 17, p. 29935-29948
The layer-by-layer construction of interfacial architectures displaying stimuli-responsive control of mass transport is attracting increasing interest in materials science. In this work, we describe the creation of interfacial architectures [...]

Strongly Stretched Protein Resistant Poly(ethylene glycol) Brushes Prepared by Grafting-To

Publication year: 2015
Authors: Gustav Emilsson †, Rafael L. Schoch ‡, Laurent Feuz , Fredrik Höök †, Roderick Y. H. Lim ‡, and Andreas B. Dahlin *†
Published in: ACS Applied Materials & Interfaces, 2015, 7 (14), pp 7505–7515
We present a new grafting-to method for resistant “non-fouling” poly(ethylene glycol) brushes, which is based on grafting of polymers with reactive end groups in 0.9 M Na2SO4 at room temperature. [...]

Biomimetic collagen I and IV double layer Langmuir–Schaefer films as microenvironment for human pluripotent stem cell derived retinal pigment epithelial cells

Publication year: 2015
Authors: Sorkio AE1, Vuorimaa-Laukkanen EP2, Hakola HM2, Liang H2, Ujula TA3, Valle-Delgado JJ3, Österberg M3, Yliperttula ML4, Skottman H5
Published in: Biomaterials, Volume 1, May 2015, Pages 257-269
The environmental cues received by the cells from synthetic substrates in vitro are very different from those they receive in vivo. In this study, we applied the Langmuir–Schaefer (LS) deposition, a variant of Langmuir–Blodgett technique, to fabricate a biomimetic microenvironment mimicking the structure and organization of native Bruch's membrane for the production of the functional human embryonic stem cell derived retinal pigment epithelial (hESC-RPE) cells. [...]

Effect of Molecular Architecture of PDMAEMA-POEGMA Random and Block Copolymers on Their Adsorption on Regenerated and Anionic Nanocelluloses and Evidence of Interfacial Water Expulsion

Publication year: 2015
Authors: Vuoriluoto M. 1, Orelma H. 1,2, Johansson L.S. 1, Zhu B. 3, Poutanen M. 4, Walther A. 3, Laine J. 1, Rojas O.J. 1
Published in: Journal of Physical Chemistry, 2015, Vol. 119, p. 15275-86
Block copolymers of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) and poly(oligo(ethylene glycol) methyl ether methacrylate) (POEGMA) with varying block sizes were synthesized by consecutive reversible addition-fragmentation chain transfer (RAFT) polymerization and then exposed to cellulose substrates with different anionic charge density. [...]

Study of the interactions of proteins with a solid surface using complementary acoustic and optical techniques

Publication year: 2014
Authors: Diaconu G1, Schäfer T1
Published in: Biointerphases 9, 029015 (2014)
Membrane water treatment processes suffer severely from (bio)fouling phenomena, defined as an undesired deposition and build-up of adsorbed materials, which alters the membrane performance. [...]

Triggering Protein Adsorption on Tailored Cationic Cellulose Surfaces

Publication year: 2014
Authors: Mohan T. 1, Niegelhell K. 4, Pinto Zarth C.S. 2, Kargl R. 3, Köstler S. 5, Ribitsch V. 1, Heinze T. 2, Spirk S. 1,4, Stana-Kleinschek K. 3
Published in: Biomacromolecules, 2014, Vol. 15 (11), p. 3931–3941
The equipment of cellulose ultrathin films with BSA (bovine serum albumin) via cationization of the surface by tailor-made cationic celluloses is described. In this way, matrices for controlled protein deposition are created, whereas the extent of protein affinity to these surfaces is controlled by the charge density and solubility of the tailored cationic cellulose derivative. [...]