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Join our next training webinar

Xenocs is pleased to welcome you to our new training webinar sessions. Join us for “Measurement of low concentration aqueous solutions. The Low Noise Flow Cell. Part 2." The second part of the webinar will deal with the data reduction process and data analysis. Date:  July, Thursday 18th 2019 Two…
5 July 2019
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsLiquid crystalsMaterialOtherPhase analysisSAXSSurfactantsTechnique

Liquid crystal phantom for validation of microscopic diffusion anisotropy measurements on clinical MRI systems

Nilsson, Markus; Larsson, Johan; Lundberg, Dan; Szczepankiewicz, Filip; Witzel, Thomas; Westin, Carl-Fredrik; Bryskhe, Karin; Topgaard, Daniel

Purpose To develop a phantom for validating MRI pulse sequences and data processing methods to quantify microscopic diffusion anisotropy in the human brain. Methods Using a liquid crystal consisting of water, detergent, and hydrocarbon, we designed a 0.5-L spherical phantom showing the theoretically highest possible degree of microscopic anisotropy. Data…
12 March 2019
Customer publications

Comb-shaped anion exchange membrane to enhance phosphoric acid purification by electro-electrodialysis

Duan, Xiaoling; Wang, Cunwen; Wang, Tielin; Xie, Xiaolin; Zhou, Xingping; Ye, Yunsheng

Comb-shaped polysulfone anion exchange membranes (AEMs) containing various pendant alkyl side chains were synthesized and characterized. Ionic clusters aggregation is observed in transmission electron microscopy (TEM) image and small-angle X-ray scattering (SAXS). The comb-shaped quaternized ammonium polysulfone (Cx-QAPSU) membranes show enhanced dimensional stability and ultra-low membrane area…
12 March 2019
ApplicationCharacterizationCrystalline fractionCustomer publicationsGIWAXSMaterialNanoparticles & colloidsPhase analysisRenewable energySAXSSelf-assembled materialStructural biologyTechniqueThin filmsWAXS

Overcoming efficiency and stability limits in water-processing nanoparticular organic photovoltaics by minimizing microstructure defects

Xie, Chen; Heumüller, Thomas; Gruber, Wolfgang; Tang, Xiaofeng; Classen, Andrej; Schuldes, Isabel; Bidwell, Matthew; Späth, Andreas; Fink, Rainer H.; Unruh, Tobias; McCulloch, Iain; Li, Ning; Brabec, Christoph J.

Water-based semiconducting polymer nanoparticles are eco-friendly and non-toxic but their performance suffers from the surfactants. Here Xie et al. design an approach to minimize the amount of residual surfactant in these nanoparticles and make high-efficiency and stability solar…
12 March 2019
ApplicationCatalystsCharacterizationCustomer publicationsInorganic materialsMaterialMetalsNanoparticles & colloidsParticle size and size distributionParticlesPorous materialSAXSTechnique

Investigating Particle Size Effects in Catalysis by Applying a Size-Controlled and Surfactant-Free Synthesis of Colloidal Nanoparticles in Alkaline Ethylene Glycol: Case Study of the Oxygen Reduction Reaction on Pt

Quinson, Jonathan; Inaba, Masanori; Neumann, Sarah; Swane, Andreas A.; Bucher, J.; Simonsen, Søren B.; Theil Kuhn, Luise; Kirkensgaard, Jacob J. K.; Jensen, Kirsten M. Ø.; Oezaslan, Mehtap; Kunz, Sebastian; Arenz, Matthias

Colloidal platinum nanoparticles are obtained via a surfactant-free polyol process in alkaline ethylene glycol. In this popular synthesis, ethylene glycol functions as solvent and reducing agent. The preparation procedure is known for its reproducibility to obtain 1–2 nm nanoparticles, but at the same time the controlled preparation of larger nanoparticles…
12 March 2019
(Natural) polymersApplicationCharacterizationCustomer publicationsLiquid crystalsMaterialPhase analysisPolymer researchSAXSTechnique

On the morphological behavior of ABC miktoarm stars containing poly(cis 1,4-isoprene), poly(styrene), and poly(2-vinylpyridine)

Chernyy, Sergey; Mahalik, Jyoti P.; Kumar, Rajeev; Kirkensgaard, Jacob Judas Kain; Arras, Matthias M. L.; Kim, Hyeyoung; Schulte, Lars; Ndoni, Sokol; Smith, Gregory S.; Mortensen, Kell; Sumpter, Bobby G.; Russell, Thomas P.; Almdal, Kristoffer

Fundamental understanding of microphase separation in ABC miktoarm copolymers is vital to access a plethora of nonconventional morphologies. Miktoarm stars based on poly(cis 1,4-isoprene) (I), poly(styrene) (S), and poly(2-vinylpyridine) (V) are model systems, which allow systematic studies of the effects of composition, chemical microstructure, and temperature on the thermodynamics of…
12 March 2019
(Natural) polymersApplicationCharacterizationCustomer publicationsLiquid crystalsMaterialOrientation analysisOtherTechniqueWAXS

3D Printing of Liquid Crystal Elastomeric Actuators with Spatially Programed Nematic Order

Kotikian, Arda; Truby, Ryan L.; Boley, John William; White, Timothy J.; Lewis, Jennifer A.

Liquid crystal elastomers (LCEs) are soft materials capable of large, reversible shape changes, which may find potential application as artificial muscles, soft robots, and dynamic functional architectures. Here, the design and additive manufacturing of LCE actuators (LCEAs) with spatially programed nematic order that exhibit large, reversible, and repeatable contraction with…
12 March 2019
Customer publications

Tuning poly(arylene piperidinium) anion-exchange membranes by copolymerization, partial quaternization and crosslinking

Olsson, Joel S.; Pham, Thanh Huong; Jannasch, Patric

Ion exchange membranes with high ionic contents typically suffer from excessive water uptake and dilution effects which compromise both mechanical properties and anion conductivity. In the present work we develop and compare partial quaternization, copolymerization and crosslinking as three different synthetic strategies to balance the ion exchange capacity (IEC), water…
12 March 2019