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Characterization

Enhancing the accessibility to basic sites of as-synthesized silicas applied in catalytic transesterification

Zapelini, Iago W.; Silva, Laura L.; Oliveira, Cristiano L. P.; Cardoso, Dilson

ApplicationCharacterizationCustomer publicationsMaterialOil & gasParticle interactionsSAXSSurfactantsTechnique

Enhancing the accessibility to basic sites of as-synthesized silicas applied in catalytic transesterification

Zapelini, Iago W.; Silva, Laura L.; Oliveira, Cristiano L. P.; Cardoso, Dilson

Heterogeneous catalysis for biodiesel production is a current challenge due to the low activity of solid catalysts, especially caused by diffusional resistances. Hybrid silicas, containing SiO?CTA+ provide high conversions in the transesterification of oils and model molecules, but this activity is limited to the external surface area. The generation of…
Studying Excipient Modulated Physical Stability and Viscosity of Monoclonal Antibody Formulations Using Small-Angle Scattering

Xu, Amy Yuanyuan; Castellanos, Maria Monica; Mattison, Kevin; Krueger, Susan; Curtis, Joseph E.

ApplicationCharacterizationCustomer publicationsMaterialParticle interactionsProteins & DNA/RNASAXSStructural biologyTechnique

Studying Excipient Modulated Physical Stability and Viscosity of Monoclonal Antibody Formulations Using Small-Angle Scattering

Xu, Amy Yuanyuan; Castellanos, Maria Monica; Mattison, Kevin; Krueger, Susan; Curtis, Joseph E.

Excipients are substances that are added to therapeutic products to improve stability, bioavailability, and manufacturability. Undesirable protein-protein interactions (PPI) can lead to self-association and/or high solution viscosity in concentrated protein formulations that are typically greater than 50 mg/mL. Therefore, understanding the effects of excipients on nonspecific PPI is important for…
Tuning Pore Dimensions of Mesoporous Inorganic Films by Homopolymer Swelling

Reid, Barry; Alvarez-Fernandez, Alberto; Schmidt-Hansberg, Benjamin; Guldin, Stefan

ApplicationCharacteristic dimensionCharacterizationCustomer publicationsGISAXSInorganic materialMaterialOrientation analysisPhase analysisRenewable energySAXSSurface structure and patternsTechniqueThin films

Tuning Pore Dimensions of Mesoporous Inorganic Films by Homopolymer Swelling

Reid, Barry; Alvarez-Fernandez, Alberto; Schmidt-Hansberg, Benjamin; Guldin, Stefan

The functionality and applications of mesoporous inorganic films are closely linked to their mesopore dimensions. For material architectures derived from a block copolymer (BCP) micelle coassembly, the pore size is typically manipulated by changing the molecular weight corresponding to the pore-forming block. However, bespoke BCP synthesis is often a costly…
Tandem catalysis in multicomponent solvent-free biofluids

Atkins, Dylan Luke; Berrocal, José Augusto; Mason, Alexander Francesco; Voets, Ilja Karina

ApplicationCharacterizationCustomer publicationsMaterialProteins & DNA/RNASAXSShapeSizeStructural biologyTechnique

Tandem catalysis in multicomponent solvent-free biofluids

Atkins, Dylan Luke; Berrocal, José Augusto; Mason, Alexander Francesco; Voets, Ilja Karina

Enzymes are widely employed to reduce the environmental impact of chemical industries as biocatalysts improve productivity and offer high selectively under mild reaction conditions in a diverse range of chemical transformations. The poor stability of biomacromolecules under reaction conditions is often a critical bottleneck to their application. Protein engineering or…
A Cross-Method Comparison of Sub-10 nm Nanoparticle Size Distribution

Yang, Ye; Liao, Suiyang; Luo, Zhi; Qi, Runzhang; Mac Fhionnlaoich, Niamh; Stellacci, Francesco; Guldin, Stefan

ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

A Cross-Method Comparison of Sub-10 nm Nanoparticle Size Distribution

Yang, Ye; Liao, Suiyang; Luo, Zhi; Qi, Runzhang; Mac Fhionnlaoich, Niamh; Stellacci, Francesco; Guldin, Stefan

Accurate nanoparticle (NP) size determination is essential across research domains, with many functions in nanoscience and biomedical research being size-dependent. Although transmission electron microscopy (TEM) is capable of resolving a single NP down to the sub-nm scale, the reliable representation of entire populations is plagued by challenges in providing statistical…
Fragmentation of 1,2-Polybutadiene-block-Poly(ethylene oxide) Micelles in Imidazolium-Based Ionic Liquids

Early, Julia T.; Lodge, Timothy P.

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSSelf-assembled materialTechnique

Fragmentation of 1,2-Polybutadiene-block-Poly(ethylene oxide) Micelles in Imidazolium-Based Ionic Liquids

Early, Julia T.; Lodge, Timothy P.

The effect of solvent selectivity on the fragmentation kinetics of spherical micelles formed by a 1,2-polybutadiene-block-poly(ethylene oxide) “BO” copolymer in five 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide-based ionic liquids (ILs), (, where n = methyl, ethyl, butyl, hexyl, and octyl) was investigated by temperature-jump dynamic light scattering (T-jump DLS),…
Reproducible Preparation of Proteopolymersomes via Sequential Polymer Film Hydration and Membrane Protein Reconstitution

Loo, Siew-Leng; Siti, Winna; Thiyagarajan, Monisha; Torres, Jaume; Wang, Rong; Hu, Xiao

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialProteins & DNA/RNASAXSStructural biologyTechnique

Reproducible Preparation of Proteopolymersomes via Sequential Polymer Film Hydration and Membrane Protein Reconstitution

Loo, Siew-Leng; Siti, Winna; Thiyagarajan, Monisha; Torres, Jaume; Wang, Rong; Hu, Xiao

Film rehydration method is commonly used for membrane protein (MP) reconstitution into block copolymer (BCP), but the lack of control in the rehydration step formed a heterogeneous population of proteopolymersomes that interferes with the characterization and performance of devices incorporating them. To improve the self-assembly of polymersomes with simultaneous MP…
Nanofibril Organization in Silk Fiber as Inspiration for Ductile and Damage-Tolerant Fiber Design

Lin, Shihui; Ye, Chao; Zhang, Wenwen; Xu, Anchang; Chen, Shixian; Ren, Jing; Ling, Shengjie

ApplicationCharacterizationCustomer publicationsFibersMaterialOrientation analysisOtherSAXSTechnique

Nanofibril Organization in Silk Fiber as Inspiration for Ductile and Damage-Tolerant Fiber Design

Lin, Shihui; Ye, Chao; Zhang, Wenwen; Xu, Anchang; Chen, Shixian; Ren, Jing; Ling, Shengjie

Ductile and damage-tolerant fibers (DDTFs) are desired in aerospace engineering, mechanical engineering, and biomedical engineering because of their ability to prevent the catastrophic sudden structural/mechanical failure. However, in practice, design and fabrication of DDTFs remain a major challenge due to finite fiber size and limited processing techniques. In this regard,…