Publications: Material science

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Homogeneous cellulose thin films by regeneration of cellulose xanthate: properties and characterization

Publication year: 2017
Authors: Weißl M. 1, 2, Niegelhell K. 2, Reishofer D. 2, Zankel A. 3, Innerlohinger J. 4, Spirk S. 2
Published in: Cellulose, 2017, Vol. 25, Issue 1, p. 711-721
The preparation and characterization of cellulose thin films derived from cellulose xanthate is reported. The films are prepared by depositing alkaline aqueous solutions cellulose xanthate onto silicon wafers, followed by [...]

Dangerous liaisons: anion-induced protonation in phosphate-polyamine interactions and their implications for charge states of biologically relevant surfaces

Publication year: 2017
Authors: Laucirica G., Marmisollé W.A., Azzaroni O.
Published in: Physical Chemistry Chemical Physics, 2017, Vol. 19 (12), p. 8612-8620
Although not always considered a preponderant interaction, amine-phosphate interactions are omnipresent in multiple chemical and biological systems. [...]

“Click” access to multilayer functionalized Au surface: A terpyridine patterning example

Publication year: 2017
Authors: F.A. Martin a, D. Marconi a, S. Neamtu a, T. Radu a, M. Florescu b, R. Turcu a, C. Lar c, N.D. Hădade c, I. Grosu c, I. Turcu a
Published in: Materials Science and Engineering: C, 2017, Vol. 75, p. 1343–1350
This work is focused on self-assembled monolayers (SAMs) fabrication, using two types of Au surfaces, by subsequent attachment of different layers in order to develop [...]

Protein Adsorption Tailors the Surface Energies and Compatibility between Polylactide and Cellulose Nanofibrils

Publication year: 2017
Authors: A. Khakalo 1, I. Filpponen 1,2, O.J. Rojas 1,3
Published in: Biomacromolecules, 2017, Vol. 18 (4), p. 1426–1433
The state of dispersion and the interactions between a polymer and a filler in a nanocomposite crucially define its properties and performance.The affinity of polylactide (PLA) [...]

Combining Surface Plasmon Resonance and Quartz Crystal Microbalance To Determine Hydration of Dendrimer Monolayers

Publication year: 2016
Authors: Barbara Jachimska and Karolina Tokarczyk
Published in: Journal of Physical Chemistry C
Polyelectrolytes are abundant in nature and crucial due to their versatility in biological systems. The controlled assembly of polyelectrolytes has potential applications in the formation of nanostructured and microstructured materials of desired structure and functionality. [...]

Adsorption of Xyloglucan onto Cellulose Surfaces of Different Morphologies: An Entropy-Driven Process

Publication year: 2016
Authors: Tobias Benselfelt 1, Emily D. Cranston 2, Sedat Ondaral 3, Erik Johansson 4, Harry Brumer 5, Mark W. Rutland 6, and Lars Wågberg 1
Published in: Biomacromolecules, 2016, Vol. 17(9), p. 2801-11
The temperature-dependence of xyloglucan (XG) adsorption onto smooth cellulose model films regenerated from N-methylmorpholine N-oxide (NMMO) was investigated using surface plasmon resonance spectroscopy, and it was found that the adsorbed amount increased with increasing temperature. [...]

Effect of PEG–PDMAEMA Block Copolymer Architecture on Polyelectrolyte Complex Formation with Heparin

Publication year: 2016
Authors: Välimäki S. 1, Khakalo A. 2, Ora A. 1, Johansson L.-S. 2, Rojas O.J. 2, Kostiainen M.A. 1
Published in: Biomacromolecules, 2016, Vol. 17(9), p. 2891-900
Heparin is a naturally occurring polyelectrolyte consisting of a sulfated polysaccharide backbone. It is widely used as an anticoagulant during major surgical operations. However, the associated bleeding risks require rapid neutralization after the operation. [...]

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 [...]

Influence of the sulfation degree of glycosaminoglycans on their multilayer assembly with poly-l-lysine

Publication year: 2016
Authors: Teixeira R. 1,2, Reis R.L. 1,2, Pashkuleva I. 1,2
Published in: Colloids and Surfaces B: Biointerfaces, 2016, Vol. 145, p. 567-575
We report on the build-up and the intrinsic properties of polyelectrolyte multilayer films from poly-l-lysine and glycosaminoglycans (GAGs) with different sulfation degree, i.e. different charge [...]

Dual-Wavelength Surface Plasmon Resonance for Determining the Size and Concentration of Sub-Populations of Extracellular Vesicles

Publication year: 2016
Authors: Rupert D.L.M. 1, Shelke G.V. 2, Emilsson G. 1, Claudio V. 1, Block S. 1, Lässer C. 2, Dahlin A. 1, Lötvall J.O. 2, Bally M. 1,3, Zhdanov V.P. 1,4, Höök F. 1
Published in: Analytical Chemistry, 2016, Vol. 88 (20), p. 9980–9988
Accurate concentration determination of subpopulations of extracellular vesicles (EVs), such as exosomes, is of importance both in the context of understanding their fundamental biological role [...]

Dopamine-assisted deposition and zwitteration of hyaluronic acid for the nanoscale fabrication of low-fouling surfaces

Publication year: 2016
Authors: Huijun Ye b, Yinqiang Xia b, Zhiqiang Liu b, Renliang Huang *a, Rongxin Su *b,c,d, Wei Qi b,c,d, Libing Wang *e, Zhimin He b
Published in: Journal of Materials Chemistry B, 2016, Vol. 4, p. 4084-4091
In this study, we proposed a bioinspired approach for the deposition and zwitteration of hyaluronic acid (HA) with a reduced glutathione (GSH) to form a composite layer that functions as a low fouling coating. [...]

Cellulose nanocrystal interactions probed by thin film swelling to predict dispersibility

Publication year: 2016
Authors: Reid M.S. a, Villalobos M. b, Cranston E.D. *a
Published in: Nanoscale, 2016, Vol. 8, p. 12247-12257
The production of well-dispersed reinforced polymer nanocomposites has been limited due to poor understanding of the interactions between components. Measuring the cohesive particle–particle interactions and the adhesive particle–polymer interactions is challenging due to nanoscale dimensions and poor colloidal stability of nanoparticles in many solvents. [...]

Assembly of citrate gold nanoparticles on hydrophilic monolayers

Publication year: 2016
Authors: Vikholm-Lundin I. a, b, Rosqvist E. c, Ihalainen P. c, Munter T. d, Honkimaa A. e, Marjomäki V. f, Albers W.M. g, Peltonen J. c
Published in: Applied Surface Science, 2016, Vol. 378, p. 519–529
Self-assembled monolayers (SAMs) as model surfaces were linked onto planar gold films thorough lipoic acid or disulfide groups. The molecules used were polyethylene glycol (EG-S-S), N-[tris-(hydroxymethyl)methyl]acrylamide polymers with and without lipoic acid (Lipa-pTHMMAA and pTHMMAA) and a lipoic acid triazine derivative (Lipa-MF). [...]

Lignocellulosic Materials and their Interactions with Proteins and Surface Active Molecules

Publication year: 2016
Authors: Fritz C.
Published in: Doctoral dissertation, North Carolina State University
Lignocellulosic biomass is a highly valuable resource for the development of value-added biobased chemicals and other materials. However, the efficient utilization of this biomass regards on understanding the different interactions [...]

Noncovalent functionalization of solid-state nanopores via self-assembly of amphipols

Publication year: 2016
Authors: Pérez-Mitta G. 1, Burr L. 2, Tuninetti J.S. 1, Trautmann C. 2, Toimil-Molares M.E. 3, Azzaroni O. 4
Published in: Nanoscale, 2016, Vol. 8(3), p. 1470-8
In recent years there has been increasing interest in the development of new methods for conferring functional features to nanopore-based fluidic devices. In this work, we describe for the first time the noncovalent integration of amphoteric-amphipathic polymers, also known as "amphipols", into single conical nanopores in order to obtain signal-responsive chemical nanodevices. [...]