Category

SAXS

ApplicationCharacterizationCustomer publicationsFractal dimensionInorganic materialMaterialNanoparticles & colloidsParticlesPhase analysisSAXSShapeSizeTechnique

Unraveling the Role of Alkali Cations in the Growth Mechanism of Gd2O2S Nanoparticles

Larquet, Clément; Carriere, David; Nguyen, Anh-Minh; Le, Thi Kim-Chi; Frogneux-Plé, Xavier; Génois, Isabelle; Le Griel, Patrick; Gauzzi, Andrea; Sanchez, Clément; Carenco, Sophie

Alkali cations are required for the colloidal synthesis of Ln2O2S nanoplates in organic solvent. Based on a thorough experimental analysis using various lanthanides and three alkali ions, we challenge the commonly accepted scenario of partial lanthanide substitution by the alkali, which is supposed to favor the sulfide insertion over the…
sergio.rodrigues@xenocs.com
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsMaterialNanoparticles & colloidsParticle interactionsParticle size and size distributionPolymer researchSAXSShapeSizeTechnique

Effects of Hairy Nanoparticles on Polymer Crystallization Kinetics

Jimenez, Andrew M.; Krauskopf, Alejandro A.; Pérez-Camargo, Ricardo A.; Zhao, Dan; Pribyl, Julia; Jestin, Jacques; Benicewicz, Brian C.; Müller, Alejandro J.; Kumar, Sanat K.

We previously showed that nanoparticles (NPs) could be ordered into structures by using the growth rate of polymer crystals as the control variable. In particular, for slow enough spherulitic growth fronts, the NPs grafted with amorphous polymer chains are selectively moved into the interlamellar, interfibrillar, and interspherulitic zones of a…
sergio.rodrigues@xenocs.com
12 March 2021
ApplicationCharacterizationCustomer publicationsMaterialPorous materialRenewable energySAXSSizeTechnique

Application of Experimental Design to Hydrogen Storage: Optimisation of Lignin-Derived Carbons

Rowlandson, Jemma L.; Coombs OBrien, James; Edler, Karen J.; Tian, Mi; Ting, Valeska P.

Lignin is a significant by-product of the paper pulping and biofuel industries. Upgrading lignin to a high-value product is essential for the economic viability of biorefineries for bioethanol production and environmentally benign pulping processes. In this work, the feasibility of lignin-derived activated carbons for hydrogen storage was studied using a…
sergio.rodrigues@xenocs.com
12 March 2021
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsLipidsMaterialProteins & DNA/RNASAXSSizeStructural biologyTechnique

Ultrastructural modeling of small angle scattering from photosynthetic membranes

Jakubauskas, Dainius; Kowalewska, Lucja; Sokolova, Anna V.; Garvey, Christopher J.; Mortensen, Kell; Jensen, Poul Erik; Kirkensgaard, Jacob J. K.

The last decade has seen a range of studies using non-invasive neutron and X-ray techniques to probe the ultrastructure of a variety of photosynthetic membrane systems. A common denominator in this work is the lack of an explicitly formulated underlying structural model, ultimately leading to ambiguity in the data interpretation.…
sergio.rodrigues@xenocs.com
12 March 2021
ApplicationCharacterizationCustomer publicationsFractal dimensionMaterialOtherPorous materialSAXSSizeTechnique

Cast-and-Use Super Black Coating Based on Polymer-Derived Hierarchical Porous Carbon Spheres

Guo, Jing; Li, Dongdong; Zhao, Han; Zou, Weizhi; Yang, Zhusheng; Qian, Zhenchao; Yang, Shijia; Yang, Meng; Zhao, Ning; Xu, Jian

Super black materials with extremely low reflectance and high absorption of incident light are crucial in various applications with strict optical requirements. However, the existing super black materials suffer from technical complexity in practical use whereas the underlying physics of their ultralow reflectance is still unclear. Herein, hierarchical porous carbon…
sergio.rodrigues@xenocs.com
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialOtherPolymer researchSAXSTechniqueWAXS

Rheological modifiers based on supramolecular block copolymers: From weak associations to interconnected micelles

Goldansaz, Hadi; Jangizehi, Amir; Nikravan, Goolia; Verkinderen, Olivier; Goderis, Bart; Ghaffarian, Seyed Reza; van Ruymbeke, Evelyne; Ahmadi, Mostafa

The rheological spectra of poly(n-butyl acrylate) in the presence of a series of P(nBA-b-HEMA) rheology modifiers show a two-step relaxation process originating from the PnBA matrix and the self-assemblies. The HEMA segments are further grafted with strong, hydrogen bonding UPy groups, which both magnifies and slows down the relaxation of…
sergio.rodrigues@xenocs.com
12 March 2021
(Hydro)gelsApplicationCharacteristic dimensionCharacterizationCosmetics & consumer careCustomer publicationsMaterialSAXSTechnique

The Influence of Structure and Morphology on Ion Permeation Behaviour in Commercial Silicone Hydrogel Contact Lenses

Saez-Martinez, Virginia; Mann, Aisling; Lydon, Fiona; Molock, Frank; Layton, Siân A.; Toolan, Daniel T. W.; Howse, Jonathan R.; Topham, Paul D.; Tighe, Brian J.

The importance of the microstructure on the permeability of silicone hydrogels is widely appreciated but is poorly understood and minimally investigated. In contrast with most conventional hydrogels, the water content and water structuring within silicone hydrogels cannot be solely used to predict their permeability. To ensure comfort and eye health,…
sergio.rodrigues@xenocs.com
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialParticle interactionsPhase analysisPolymer researchSAXSSelf-assembled materialSizeTechnique

Order–Order Phase Transitions Induced by Supercritical Carbon Dioxide in Triblock Copolymer Thin Films

Abate, Anabella A.; Vu, Giang Thi; Piqueras, Cristian M.; del Barrio, María Cecilia; Gómez, Leopoldo R.; Catalini, Gabriel; Schmid, Friederike; Vega, Daniel A.

We study the influence of supercritical carbon dioxide (scCO2) on the phase behavior of a cylinder-forming polystyrene-block-polybutadiene-b-polystyrene triblock copolymer thin film. Solvent annealing with scCO2 can produce patterns with long-range order but these structures become unstable for thin films with small thicknesses. These results are in good agreement with self-consistent…
sergio.rodrigues@xenocs.com
12 March 2021
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsInorganic materialsMaterialMetalsSAXSTechnique

Ambient synthesis of nanomaterials by in situ heterogeneous metal/ligand reactions

S. Chang, Boyce; Thomas, Brijith; Chen, Jiahao; D. Tevis, Ian; Karanja, Paul; Çınar, Simge; Venkatesh, Amrit; J. Rossini, Aaron; M. Thuo, Martin

Coordination polymers are ideal synthons in creating high aspect ratio nanostructures, however, conventional synthetic methods are often restricted to batch-wise and costly processes. Herein, we demonstrate a non-traditional, frugal approach to synthesize 1D coordination polymers by in situ etching of zerovalent metal particle precursors. This procedure is denoted as the…
sergio.rodrigues@xenocs.com
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSSelf-assembled materialTechnique

CO2-Triggered and temperature-switchable crystallization-driven self-assembly of a semicrystalline block copolymer in aqueous medium

Zhu, Rui; Luo, Xinjie; Feng, Yujun; Billon, Laurent

The synthesis of a semicrystalline block copolymer comprising a hydrophilic poly(acrylic acid) (PAA) pure block and an amphiphilic poly(acrylic acid)-r-poly(octadecyl acrylate) (PAA-r-PODA) random block by nitroxide-mediated polymerization (NMP) is reported. The aggregation behavior of the copolymer in aqueous medium was studied by using a MicroCal VP differential scanning calorimeter (VP-DSC)…
sergio.rodrigues@xenocs.com
12 March 2021