Category

Fractal dimension

(Natural) polymersApplicationCharacterizationCompositesCustomer publicationsFractal dimensionMaterialOtherOtherPolymer researchSAXSSizeTechnique

Phase separation and performance of polyethersulfone/cellulose nanocrystals membranes

Lessan, Fatemeh; Karimi, Mohammad; Bañuelos, Jose Leobardo; Foudazi, Reza

We investigate the effect of cellulose nanocrystals (CNC) as a hydrophilic nanoparticle on the characteristics of polyethersulfone (PES) based membranes. The membranes are fabricated using typical nonsolvent induced phase separation (NIPS) method. We study the radius of gyration and aggregation of PES in dimethylformamide in the presence of CNC, the…
27 January 2020
ApplicationCharacterizationCustomer publicationsFractal dimensionMaterialProteins & DNA/RNASAXSSizeStructural biologyTechnique

Nanoscopic Structure of Complexes Formed between DNA and the Cell-Penetrating Peptide Penetratin

de Mello, Lucas Rodrigues; Hamley, Ian William; Castelletto, Valeria; Garcia, Bianca Bonetto Moreno; Han, Sang Won; de Oliveira, Cristiano Luis Pinto; da Silva, Emerson Rodrigo

One of the most remarkable examples of cell-penetrating peptides (CPPs) is Penetratin, a 16-mer fragment derived from the Drosophila Antennapedia homeobox. Understanding the structure of Penetratin/DNA complexes is a key factor for the successful design of new vectors for gene delivery and may assist in optimizing molecular carriers based on…
27 January 2020
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsFractal dimensionMaterialPhase analysisPorous materialSAXSStructural biologyTechnique

Crystal Chemistry and SAXS Studies of an Octahedral Polyoxoarsenotungstate Nanocluster Encapsulating Four Unprecedented Thorium Arsenate Fragments (Th3As2On – n = 25 or 26)

Dufaye, Maxime; Duval, Sylvain; Stoclet, Grégory; Loiseau, Thierry

The reaction of 8– with the 5f tetravalent thorium cation in presence of an acetate buffer and KCl at pH = 4.7 gives rise to the formation of an octahedral polyoxoarsenotungstate nanocluster 38–. This molecule is constructed around four unprecedented Th3As2On (n = 25 or 26) fragments stabilized by the…
27 January 2020
ApplicationCharacterizationCustomer publicationsFractal dimensionInorganic materialsMaterialMetalsSAXSSizeTechnique

Precipitation in original Duralumin A-U4G versus modern 2017A alloy

Brunet, Magali; Malard, Benoit; Ratel-Ramond, Nicolas; Deshayes, Christophe; Joulié, Sébastien; Warot-Fonrose, Bénédicte; Sciau, Philippe; Douin, Joël; De Geuser, Frédéric; Deschamps, Alexis

Precipitation in Duralumin, a historic quaternary alloy of the type: Al–Cu–Mg–Si, was never fully studied nor observed by current electron microscopy techniques. This article presents the full characterization and comparison of two alloys: a Duralumin (A-U4G) from the 1950s collected on a vintage aircraft and its modern equivalent: a 2017A…
27 January 2020
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionMaterialPolymer researchSAXSSizeTechnique

Reinforcement of polychloroprene by grafted silica nanoparticles

Abbas, Zaid M.; Tawfilas, Massimo; Khani, Mohammed M.; Golian, Karl; Marsh, Zachary M.; Jhalaria, Mayank; Simonutti, Roberto; Stefik, Morgan; Kumar, Sanat K.; Benicewicz, Brian C.

Reversible addition-fragmentation chain transfer polymerization of chloroprene on the surface of silica nanoparticles was performed to obtain polychloroprene-grafted-silica nanoparticles (PCP-g-SiO2 NPs). These particles were dispersed in a commercial polychloroprene matrix to obtain PCP nanocomposites with different silica core loadings (1, 5, 10, and 25?wt%). Two different chain graft densities…
27 January 2020
ApplicationCharacterizationCustomer publicationsFibersFractal dimensionMaterialPhase analysisProteins & DNA/RNASAXSSelf-assembled materialStructural biologyTechniqueWAXS

Aggregation behavior of the amyloid model peptide NACore

Pallbo, Jon; Sparr, Emma; Olsson, Ulf

The aggregation of the 11 residue long NACore peptide segment of ?-synuclein (68-GAVVTGVTAVA-78) has been investigated using a combination of cryogenic transmission electron microscopy (cryo-TEM), small- and wide-angle X-ray scattering, and spectroscopy techniques. The aqueous peptide solubility is pH dependent, and aggregation was triggered by a pH quench from pH…
27 January 2020
(Natural) polymersApplicationCharacterizationCompositesCustomer publicationsFractal dimensionMaterialParticle interactionsParticlesPolymer researchSAXSTechnique

Morphologies of Polyisoprene-Grafted Silica Nanoparticles in Model Elastomers

Bonnevide, Marine; Jimenez, Andrew M.; Dhara, Deboleena; Phan, Trang N.T.; Malicki, Nicolas; Abbas, Zaid M.; Benicewicz, Brian; Kumar, Sanat K.; Couty, Marc; Gigmes, Didier; Jestin, Jacques

We control nanoparticle (NP) dispersion by leveraging the entropic and enthalpic effects associated with mixing silica NPs grafted with polyisoprene (PI) chains into matrices of varying degrees of chemical dissimilarity. Previous work in this area has primarily focused on entropic factors alone, and hence, this work represents a significant advance…
27 January 2020
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionMaterialPolymer researchSAXSTechnique

A highly transparent and ultra-stretchable conductor with stable conductivity during large deformation

Lei, Zhouyue; Wu, Peiyi

Intrinsically stretchable conductors have undergone rapid development in the past few years and a variety of strategies have been established to improve their electro-mechanical properties. However, ranging from electronically to ionically conductive materials, they are usually vulnerable either to large deformation or at high/low temperatures, mainly due to the fact…
25 November 2019
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Simply planarizing nonfused perylene diimide based acceptors toward promising non-fullerene solar cells

Bian, Gao-Feng; Zhao, Feng; Lau, Tsz-Ki; Sheng, Chun-Qi; Lu, Xinhui; Du, Hui; Zhang, Cheng; Qu, Zhi-Rong; Chen, Hongzheng; Wan, Jun-Hua

This work focuses on developing high-efficiency perylene diimide (PDI)-based small molecular nonfullerene acceptors with a simple synthetic strategy. We reported a new electron acceptor, Py-e-PDI, obtained via cross-coupling four PDI units with a planar pyrene core through ethynyl groups. Although the ring-fusion synthetic procedure was omitted, the large planar core…
25 November 2019
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core

Yuan, Jun; Zhang, Yunqiang; Zhou, Liuyang; Zhang, Guichuan; Yip, Hin-Lap; Lau, Tsz-Ki; Lu, Xinhui; Zhu, Can; Peng, Hongjian; Johnson, Paul A.; Leclerc, Mario; Cao, Yong; Ulanski, Jacek; Li, Yongfang; Zou, Yingping

Summary Recently, non-fullerene n-type organic semiconductors have attracted significant attention as acceptors in organic photovoltaics (OPVs) due to their great potential to realize high-power conversion efficiencies. The rational design of the central fused ring unit of these acceptor molecules is crucial to maximize device performance. Here, we report a new…
25 November 2019